Class / Patent application number | Description | Number of patent applications / Date published |
166241100 | GUIDE FOR DEVICE OR CONDUIT | 89 |
20100059218 | DOWNHOLE APPARATUS AND METHOD OF FORMING THE SAME - The present invention relates to a method of forming downhole apparatus. The method comprises disposing a plastics material ( | 03-11-2010 |
20100276138 | Low Friction Centralizer - A centralizer for a downhole system, such as but not limited to a casing system. In some embodiments, the centralizer has a tubular body and a plurality of roller ball assemblies circumferentially spaced about the tubular body. Each roller ball assembly includes a plurality of rotatable balls adapted to engage a surface radially offset from the centralizer and rotate relative to the surface in any direction. | 11-04-2010 |
20100288489 | SEQUENCE VALVE AND A DOWNHOLE TRACTOR - The invention relates to a sequence valve for use in a hydraulic plant, which sequence valve has a pressure-controlled slide valve ( | 11-18-2010 |
20110000665 | Hydraulically Locking Stabilizer - A downhole tool includes a pressure housing deployed in the bore of a drill collar. At least three fins are deployed on the housing and in the tool annulus. At least one of the fins includes a floating blade deployed thereon. The blade includes a plurality of radial pistons deployed therein. The pistons are configured such that the surface area of the radially outward facing piston surfaces is greater than the surface area of the radially inward facing piston surfaces. This piston configuration causes the surface area of the radially outward facing blade surface to be less than the radially inward facing blade surface. In operation, hydrostatic pressure exerts a differential force on the pistons and the floating blade thereby urging the pistons radially inward towards the housing and the blade radially outward towards the drill collar. | 01-06-2011 |
20110114307 | OPEN HOLE NON-ROTATING SLEEVE AND ASSEMBLY - A non-rotating downhole sleeve adapted for open hole drilling and/or casing centralization. The sleeve includes a tubular body made of hard plastic with integrally formed helical blades positioned around its outer surface and an inner surface configuration which allows drilling fluid circulation to form a non-rotating fluid bearing between the sleeve and the drill pipe or casing. The helical blades reduce sliding and rotating torque while drilling, with minimal obstruction to drilling fluid passing through the borehole between the blades. In one embodiment, improvements are provided during casing exit when drilling in open hole environments. In another embodiment, improvements are provided in the sleeve's resistance to compressive loading. | 05-19-2011 |
20110290474 | CENTRALISING TOOL AND METHOD OF FORMING - The invention relates to a centralizing tool, and to a method of forming a centralizing tool. A disclosed method of assembling a wellbore centralizer includes the step of providing a plurality of centralizing members, each centralizing member being of unitary construction and having a first circumferential part, a second circumferential part, and a longitudinal part disposed between the first and second circumferential parts. A first collar is formed by welding the first circumferential parts into a ring. A second collar is formed by welding the second circumferential parts into a ring. | 12-01-2011 |
20120006533 | Wellbore Centralizer for Tubulars - A tubular centralizer is secured to the tubular for run in. The profile for run in is small so that damage to the centralizer is minimized during run in. When the string is in position the centralizer is actuated to change shape or volume to engage the surrounding borehole to centralize the tubular for subsequent operations such as cementing or in the case of screens for gravel packing. The centralizer can be a shape memory material that is initially compressed at above its transition temperature to hold the smaller shape. At the desired location after run in it is brought above the transition temperature and changes back to the original shape or volume to centralize the tubular string. The structure can be spaced ring segments or a cohesive ring structure with an undulating profile or radiating blades to create flow spaces in the annulus where it is deployed for flow of a sealing material or gravel, for example. | 01-12-2012 |
20120073802 | COMPLEX TOOL FOR WELL MONITORING - A complex tool according to the invention comprises a cylindrical housing, a lever centralizer aligning the tool along the well axis and having at least six levers and a fluid flow temperature sensor and inflow temperature indicator located on the tool axis. A fluid phase composition sensors are located on the centralizer levers and distributed along the well bore circumference. An additional fluid phase composition sensor is located on the tool axis. At least one additional fluid flow temperature sensor and at least one additional inflow temperature indicator disposed on each lever and distributed along the well bore circumference and located on the same line with the phase composition sensors parallel to the tool axis. There is an additional upper lever centralizer in the tail part. | 03-29-2012 |
20120073803 | DUAL ROTARY CENTRALIZER FOR A BOREHOLE - The present invention relates to an apparatus for use in a wellbore, which comprises two rotating bodies | 03-29-2012 |
20120103597 | Overpull Indicator - An outer wellhead member has a bore with a first profile portion and an annular recess. A tubular inner wellhead member with a centralizer/overpull ring is lowered into the outer wellhead member. The centralizer/overpull ring is biased to expand outward to engage the bore of the outer wellhead member to center the inner wellhead member within the bore as the inner wellhead member is lowered through the bore. The recess of the outer wellhead member is adapted to receive the centralizer/overpull ring and oppose axial movement of the centralizer/overpull ring to enable an upward test pull of the inner wellhead member. | 05-03-2012 |
20120193089 | Sucker Rod Centralizer - A coupling assembly is disclosed for connecting and centralizing a first threaded-end member and a second threaded-end member, the coupling assembly comprising: a mandrel having a rotor receiving surface bounded by a first stop and a second stop, the mandrel having a first threaded pin at a first end for connection to a first threaded box coupling for the first threaded-end member, and a second threaded pin at a second end for connection to a second threaded box coupling for the second threaded-end member; each of the first stop and the second stop having respective outer diameters and the respective outer diameters being less than or equal to the respective outer diameters of the first threaded box coupling and the second respective box coupling; and a rotor with raised fins mounted on the rotor receiving surface between the first stop and the second stop. | 08-02-2012 |
20120241146 | Wireless downhole tool positioning system - A free falling drop sub carries an explosive tool such as a shaped charge pipe cutter or well perforator. The drop sub includes an aperture plugging element to isolate an upper pipe string from a lower pipe string. An upper pipe string fluid pressure actuated valve element retained by shear pins is released to admit the upper string pressure against a pressure displaced firing pin. Displacement of the firing pin initiates detonation of the explosive tool. | 09-27-2012 |
20130255935 | Expansion Tool for Non-Cemented Casing-Casing Annulus (CCA) Wellbores - The present invention relates to expansion tools used to centralize a casing-casing annulus in a wellbore. One embodiment provides an elongate body having a first force multiplier case coupled to an expansion tool case. A piston may be arranged within the first force multiplier case and configured to translate axially therein. A ram may be arranged within the expansion tool case, the ram being coupled to the piston and configured to translate axially within the expansion tool case in response to a force applied by the piston. One or more lug assemblies are arranged within the expansion tool case and configured to radially expand once engaged by the ram as the ram translates axially. | 10-03-2013 |
20140174722 | Extended Reach Well System - A system and methodology facilitates extending the reach of coiled tubing during a well operation. The technique employs tubing which is deployed along wellbore. A plurality of extended reach devices is positioned along the tubing. Each extended reach device has at least one internal guide member oriented for extension into an interior of the tubing. The guide member engages and guides the coiled tubing during movement of the coiled tubing along the interior of the tubing, thus enabling an extended reach during a wellbore servicing application. | 06-26-2014 |
20140251595 | ROLLED TUBULAR CENTRALIZER - A method of forming a centralizer where a flat plate is created into a tubular where the flat plate is typically rolled so that two sides of the plate contact one another and are then linked, typically by welding. Openings are then created in the tubular such that there are no corners or other points that stress cracks may originate. Once the openings are created the remaining material between adjacent openings forms ribs. The openings created in the tubular are generally aligned with the long axis of the tubular. The material at the upper and lower end of the flat plate where openings were not created serve as circumferential collars. The ribs may be radially outwardly expanded in order to provide adequate stand-off. In many instances the ribs will also be hardened by heat treating or other hardening processes. | 09-11-2014 |
20140262215 | CASING CENTRALIZER - A casing centralizer comprising a cylindrical base and a plurality of blades extending from the cylindrical base, wherein the plurality of blades and the cylindrical base are compression molded as a single piece from a mineral filled, glass and specialty fiber reinforced polyester molding compound. | 09-18-2014 |
20140305632 | Coil Tube Injector System - A coil tube injector head comprising at least two gearbox units, wherein each gearbox unit drives a gripper assembly comprising a plurality of gripper assembly links. The gripper assembly links comprise a gripper surface that engages a length of coil tubing and one or more roller bearings that engage a bearing plate. The coil tube injector head further comprises a skid plate that is coupled to the bearing plate and receives pressure from one or more traction cylinders. The assembly of the claimed embodiments further allows for ease of maintenance and service of the coil tube injector by operators in the field of oil and gas production. | 10-16-2014 |
20140367085 | MODIFIED TUBULAR - A positioning member ( | 12-18-2014 |
20150060049 | Retractable Collet Assembly for Liner String Installation in a Wellbore - A collet assembly for installing a liner string having a profile in a wellbore. The collet assembly has a generally cylindrical collet collar with a plurality of collet fingers extending therefrom each having a collet head on a distal end thereof. In a first position, the collet fingers are in a radially outwardly flexed state such that the collet finger extend substantially parallel with the central axis of the collet collar. In a second position, the collet fingers are in a radially relaxed state such that the collet fingers extend from the collet collar to the collet heads at an angle toward the central axis of the collet collar. | 03-05-2015 |
20150060050 | CHROMIUM-FREE THERMAL SPRAY COMPOSITION, METHOD, AND APPARATUS - A composition, method for depositing the composition on a downhole component, and a downhole tool. The composition includes about 0.25 wt % to about 1.25 wt % of carbon, about 1.0 wt % to about 3.5 wt % of manganese, about 0.1 wt % to about 1.4 wt % of silicon, about 1.0 wt % to about 3.0 wt % of nickel, about 0.0 to about 2.0 wt % of molybdenum, about 0.7 wt % to about 2.5 wt % of aluminum, about 1.0 wt % to about 2.7 wt % of vanadium, about 1.5 wt % to about 3.0 wt % of titanium, about 0.0 wt % to about 6.0 wt % of niobium, about 3.5 wt % to about 5.5 wt % of boron, about 0.0 wt % to about 10.0 wt % tungsten, and a balance of iron. | 03-05-2015 |
20150122484 | MODIFIED TUBULAR - A positioning member for a tubular is formed using a prefabricated fibre-reinforced resin shell positioned upon a surface of the tubular and bonded to provide a protrusion upon the surface of the tubular. In a disclosed method a fibre-reinforced resin shell is secured to an external surface of a tubular thereby enclosing a cavity between the shell and the surface of the tubular; a bonding agent is introduced through inlet ports in a surface of the fibre-reinforced resin shell to fill a cavity between the shell and the surface of the tubular ( | 05-07-2015 |
20150144329 | DOWNHOLE FORCE GENERATING TOOL - The disclosure of this application is directed to a downhole tool comprising a central element/member and a sleeve that is rotatably and orbitally disposed around the central element/member. The sleeve rotates and orbits around the central element/member responsive to fluid flowing through the downhole too. The disclosure is also related to a method of advancing the downhole tool in a well by flowing fluid through the tool. | 05-28-2015 |
20150354281 | DOWNHOLE FORCE GENERATING TOOL - The disclosure of this application is directed to a downhole tool comprising a central element/member and a sleeve that is rotatably and orbitally disposed around the central element/member. The sleeve rotates and orbits around the central element/member responsive to fluid flowing through the downhole too. The disclosure is also related to a method of advancing the downhole tool in a well by flowing fluid through the tool. | 12-10-2015 |
20150354282 | DOWNHOLE FORCE GENERATING TOOL - The disclosure of this application is directed to a downhole tool comprising a central element/member and a sleeve that is rotatably and orbitally disposed around the central element/member. The sleeve rotates and orbits around the central element/member responsive to fluid flowing through the downhole too. The disclosure is also related to a method of advancing the downhole tool in a well by flowing fluid through the tool. | 12-10-2015 |
20160145971 | Alignment Apparatus for a Sliding Sleeve Subterranean Tool - An alignment device for a sliding sleeve in a housing in a tubular string features a patterned alignment ring that remains stationary. The sliding sleeve in one of its end positions has a mating profile such that profile misalignment results in profile alignment as the sliding sleeve is axially advanced toward the alignment ring. In a choke application the fully closed position of the choke brings the profiles together to induce relative rotation into an aligned configuration of the ports on the sliding sleeve with the ports on the surrounding housing. Misalignment can occur when tools are run through the sliding sleeve for other downhole operations and the design parameters for the choke prevent the use of alignment lugs in axial slots. The mating profiles do not reduce the drift dimension through the sliding sleeve and allow higher housing pressure ratings for deep set applications with large operating differential pressures. | 05-26-2016 |
166241200 | On sucker or pump rod | 8 |
20120186807 | Multi-Tasking Rod Guide - A multi-tasking downhole rod guide for centralizing a downhole pump rod production tubing within production tubing, while simultaneously reducing abrasion and deterioration of the production tubing and engendering auxiliary pump-boosting functions—with minimal energy consumption. The rod guide is configured with an elongate helix having a continuous trough-like channel through hydrocarbons flow upwardly under high pressure. As the pressurized hydrocarbons flow through a succession of plates at each equidistant helical level, the elongate helix rotates synchronously with the upwardly flowing hydrocarbons within the production tubing string. A multi-tasking downhole rod guide for centralizing downhole production tubing within a well casing, while simultaneously reducing abrasion and deterioration of the tubing and engendering auxiliary pump-boosting functions—with minimal energy consumption. The rod guide is configured with an elongate helix at each equidistant level which rotates in synchronization with the production string. | 07-26-2012 |
166241300 | Rotatable or having a rotatable element | 3 |
20090183869 | PC rod guide with rotor ridges - A rod guide is provided for use in a rotating rod string ( | 07-23-2009 |
20090260802 | CENTRALIZER FOR TUBULAR ELEMENTS - A centralizer for tubular elements is provided which includes an inner part formed by a first material having high mechanical performance and chemical stability and an outer part arranged on said inner part, formed by a second material. The second material may be an autolubricating material. The second material may further possess a low coefficient of friction. The second material may additionally possess lower mechanical performance and chemical stability than the first material. | 10-22-2009 |
20120145380 | ALIGNMENT OF DOWNHOLE STRINGS - A downhole system includes a downhole string insertable within a subterranean wellbore and a roller assembly coupled with the string. The roller assembly includes rollers mounted on lateral sides of the downhole string for reducing the resistance of deploying the string within the wellbore. The string is rotatable about its axis with respect to the roller assembly; bearing surfaces, or low torque surfaces, are included in the roller assembly to further reduce rotational friction so the string precisely positions itself to a designated orientation. | 06-14-2012 |
166241400 | Surrounding existing rod | 4 |
20120168149 | Progressive Cavity Pump Rod Guide - A rod guide receiver is molded directly onto the sucker rod and a rod guide or spinner is then molded directly onto the rod guide receiver, the spinner having a plurality of blades or fins molded as an integral part of a spinner body that is free to turn about the rod guide receiver. The rod guide receiver serves in the manner of a bearing race, having a pair of opposing stops to retain the spinner subsequently molded thereon. The spinner may also be referred to herein as a centralizing sleeve. The rod guide receiver and the spinner are both formed of polymeric materials, but of materials different from one another so that the rod guide is free to rotate about the rod guide receiver. Further, the vanes of the rod guide are formed in a zig-zag pattern to enhance the strength and effectiveness of the vanes in bearing against the inside surface of the well tubing. | 07-05-2012 |
20120292021 | Rod Guide With Wrapping Vanes - A sucker rod guide includes a pair of vanes, offset from one another by 180°, with each vane wrapping approximately 180° around the rod guide. The vanes wrap around the body of the guide, and are neither spiral nor helical because the surfaces of the vanes extending radially outwardly from the body of the rod guide define two dimensional planar surfaces, i.e. flat planes. The vane thickness varies from a maximum at each end of the vane to a minimum at a midway point along the vane. This shape assists in moving fluid up the production tubing when the guide is applied to a rotary system, such as a progressive cavity pump. This shape also enhances the erodable volume of the vanes at the extremities, while providing a less inhibiting path for the flow of fluid in reciprocating applications. | 11-22-2012 |
20130098601 | Sucker Rod Guide - A polymeric rod guide for a sucker rod, said polymeric rod guide having a body surrounding and coaxial with the sucker rod and molded in fixed contact with the rod. The body having a polygonal cross-section and a plurality of blades longitudinally disposed and extending from the body, each blade having a pair of planar longitudinal side walls and an exterior longitudinal edge, each of said blades having a first blade face disposed between a first terminal end of the blade and the exterior longitudinal edge and a second blade face disposed between a second terminal end of the blade and the exterior longitudinal edge, and an area of the body between the longitudinal side wall of a first blade and the longitudinal side wall of an adjacent second blade defines a trough having a plurality of planar surfaces. | 04-25-2013 |
20140027107 | CONTINUOUS ROD CENTRALIZER - A continuous rod centralizer has a cylindrical centralizer body with a first end, a second end, an interior surface defining a bore which receives the continuous rod, and vanes extending radially from the exterior surface. A first rod clamp clamps onto the continuous rod at the first end of the body to confine movement of the body along the continuous rod in a first direction. A second rod clamp clamps onto the continuous rod at the second end of the body to confine movement of the body along the continuous rod in a second direction. | 01-30-2014 |
166241500 | For a wireline operation | 11 |
20090301709 | Flexible Sinker Bar With Electrically Conductive Wires - An assembly including a flexible sinker bar ( | 12-10-2009 |
20100012315 | WIRELINE TRACTOR DEVICE - A device for a wireline tractor includes at least one driving wheel positioned on a displacement mechanism connected to the wireline tractor, in which the displacement mechanism is arranged so as to hold the driving wheel in a biasing manner against a well wall. The displacement mechanism at least is rotatable or movable between a first position at which the driving wheel bears against the well wall on one side of the wireline tractor, and a second position at which the driving wheel bears against the well wall on the opposite side of the wireline tractor. | 01-21-2010 |
20110030945 | CENTRALIZER APPARATUS - A centralizer for an instrument such as an in-place inclinometer is described. The centralizer has a clamp with an inner receptacle configured for coupling to the instrument housing, and a plurality of elongate fingers extending from the clamp that center the instrument in the casing. The fingers carry rollers that fit into grooves in the instrument casing. The fingers are arcuate and provide a spring-like contact force that causes the rollers to abut the instrument casing and stabilize the instrument. | 02-10-2011 |
20110290475 | TUBULAR DRILL STRING COMPONENT AND CORRESPONDING DRILL STRING - Tubular drill string component for drilling a hole with circulation of a drilling fluid around said component and in a direction going from a drill hole bottom to the surface. The component includes a first end including a female threading, a second end including a male threading, and a substantially tubular central zone. The component includes a communication tube arranged at least in the central zone and in contact with a bore of the central zone. A signal transmission cable is arranged in the tube. The communication tube includes a body formed from at least one metal strip arranged with an annular component. The body includes, in section along a plane passing through the axis of the tube, at least two axially elongated lengths, partially overlapping one another with an axial play selected to accommodate the maximum elastic deformation of the component under axial compressive and/or bending stress. | 12-01-2011 |
20120018145 | Wireline Standoff - Disclosed are devices that can be used for improving wireline cable performance during logging operations in a variety of boreholes. An embodiment includes a wireline standoff that may ameliorate the effects of wireline cable differential sticking, wireline cable key seating, and high cable drags by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. An embodiment includes a wireline standoff. The wireline standoff may comprise a pair of opposing assemblies. The opposing assemblies may each comprise a half shell, a cable insert configured to be disposed in the half shell, and external fins coupled to the half shell. The wireline standoff may further comprise one or more fasteners configured to couple the opposing assemblies to one another. | 01-26-2012 |
20120031609 | Low Friction Wireline Standoff - The low friction wireline standoff improves wireline cable performance during borehole logging operations. The use of low friction wireline standoffs ameliorates the effects of wireline cable differential sticking, wireline cable key-seating, and high wireline cable drags, by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. The low friction wireline standoff comprises external wheels mounted on two finned half shells that clamp onto the wireline with precision cable inserts which are manufactured to fit a wide range of logging cables. The wheels reduce the cable drag down-hole resulting in lower surface logging tensions, aiding conveyance in deep and deviated wells. | 02-09-2012 |
20120241147 | REELABLE SUPPORT - A reelable slickline for use in downhole or subsea operations has a structural core comprising a plurality of non-metallic fibres in a matrix. The fibres represent in the region of 30 to 50% of the volume of the core. | 09-27-2012 |
20120247756 | Fluid-Saving Pump Down Tool - A fluid saver tool for deploying in a wireline string comprises a main shaft having a concentric seat attached to a lower end of the main shaft and a variable-diameter piston assembly concentrically disposed on the main shaft and seated against the concentric seat. A concentric thrust bushing is installed on the main shaft in contact with an upper end of variable diameter piston opposite from the concentric seat. The tool enables the deployment operation to be accomplished with much less water, lower pump pressures and energy losses, and substantially less time required to complete the operation. | 10-04-2012 |
20150322734 | ORIENTING HANGER ASSEMBLY FOR DEPLOYING MWD TOOLS - An orienting hanger comprises a generally tubular inner hanger, a generally tubular outer collar, and a cylindrical tool adapter. Box and pin connections at the ends of the outer collar enable the orienting hanger assembly to be threadably inserted into a BHA. One end of the tool adapter is disposed to threadably engage the inner hanger, and the other end is disposed to threadably receive an MWD tool. The inner hanger is disposed to be received into the outer collar such that annular shoulders abut, whereupon the MWD tool is suspended from the inner hanger. The inner hanger provides structure to enable the high side of the MWD tool to be aligned with the zero degrees tool face on the BHA and then locked into that position within the outer collar. | 11-12-2015 |
20160108684 | Low Friction Wireline Standoff - The low friction wireline standoff improves wireline cable performance during borehole logging operations. The use of low friction wireline standoffs ameliorates the effects of wireline cable differential sticking, wireline cable key-seating, and high wireline cable drags, by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. The low friction wireline standoff comprises external wheels mounted on two finned half shells that clamp onto the wireline with precision cable inserts which are manufactured to fit a wide range of logging cables. The wheels reduce the cable drag down-hole resulting in lower surface logging tensions, aiding conveyance in deep and deviated wells. | 04-21-2016 |
20160108685 | Articulated Wireline Hole Finder - The articulated wireline hole finder is a modular device which attaches to the bottom of a wireline logging tool-string to aid conveyance down irregular shaped and/or deviated boreholes which possess features such as ledges, washouts, and contractions, that might otherwise terminate full descent of the tool-string to the bottom of the borehole and thereby compromise the wireline data acquisition objectives. Elements of the articulated wireline hole finder may include a low friction roller nose assembly and spacer sub, an articulated spring joint, that transfers tool-string weight and directs lateral movement of the roller nose towards hole center, and a pair of five arm centralizers that possess a wide dynamic range. | 04-21-2016 |
166241600 | Surrounding existing device or tubing | 45 |
20080210419 | Centralizer - A centraliser having a body with an inner surface provided with a friction-reducing slider, typically located in an annular recess on the inner surface of the body of the slider, spaced from the ends of the body. The slider can be formed separately from a body of the centraliser and subsequently attached thereto on the inner surface so that it is adapted to bear between the outer surface of the tubing to be centralised and the inner surface of the centraliser. This reduces rotational torque transmitted between the centraliser and the tubing, and assists in maneuvering of the tubular string into the desired position in the well. | 09-04-2008 |
20080223573 | Passive Centralizer - A passive centralizer for stably centering within a well. The centralizer may be of a retracted profile for advancement within the well and deployable for centralization upon reaching an operation site. Deployment may be achieved in an automated manner without the requirement of operator interaction therefor. Furthermore, the centralizer may be truly passive in that energy for deployment may be stored entirely within the passive centralizer prior to its insertion within the well. The passive centralizer may also be compressed following centralization by any number of downhole restrictions. In this manner the passive centralizer may also be readily withdrawn from the well. | 09-18-2008 |
20090008086 | Centering Structure for Tubular Member and Method of Making Same - An apparatus and method for manufacture of a unitary centralizer forming Apertures are formed in a blank to create an intermediate blank having bow spring elements within a unitary centralizer and expanding a medial portion of the bow spring elements. An expansion element is inserted into the intermediate blank. An expansive force is applied to the expansion element, thereby expanding the medial portion of the bow spring elements. Mandrels placed against the upper and lower surfaces of the expansion element receive a compressive force for transfer to the expansion element. Set screw holes are placed on the unitary centralizer for attachment. | 01-08-2009 |
20090151931 | Well String Centralizer and Method of Forming - Centralizers including at least a portion formed of a first material and at least one end band secured to the first material and formed of a second material. The end band being installed to resist detachment from the portion formed of the first material. | 06-18-2009 |
20090166027 | WELLBORE PIPE CENTRALIZER HAVING INCREASED RESTORING FORCE AND SELF-SEALING CAPABILITY - A centralizer includes a first stop collar configured to be affixed to an exterior surface of a pipe. A second stop collar is spaced apart from the first stop collar and is configured to be affixed to the exterior surface of the pipe. A plurality of circumferentially spaced apart longitudinal spacers is included and each is coupled at each longitudinal end to one of the stop collars. A first plurality of circumferentially spaced apart bow springs is each coupled at one longitudinal end thereof to the first stop collar and at an opposite longitudinal end thereof to a first floating collar disposed between the first and second stop collars. A second plurality of circumferentially spaced apart bow springs is each coupled at one longitudinal end thereof to the second stop collar and at an opposite longitudinal end thereof to a second floating collar disposed between the first and second stop collars. | 07-02-2009 |
20090272525 | DOWNHOLE APPARATUS WITH A SWELLABLE CENTRALISER - A downhole apparatus, for example a centraliser, comprises a swellable material which expands upon contact with at least one predetermined fluid. In a first aspect of the invention, a centraliser comprises a body and a plurality of formations upstanding from the body. In another aspect, a downhole apparatus comprises a throughbore configured to receive a tubular, a swellable member, and a rigid assembly integrally formed with the swellable member. The rigid assembly provides stand off to the apparatus in use. In a further aspect, the downhole apparatus has a first condition before expansion of the swellable member in which a rigid assembly defines a maximum outer diameter of the apparatus. In a second condition after expansion of the swellable member, the swellable member defines a maximum outer diameter of the apparatus. In a preferred embodiment, the rigid assembly is designed to flex or deform under an axial or radial load. | 11-05-2009 |
20090314486 | Device for Centering a Well Casing | 12-24-2009 |
20100018698 | Tubing centralizer - A tubing centralizing apparatus has a centralizer body including opposing end portions, a central passage extending through the opposing end portions, and a plurality of apertures extending therethrough between its exterior side surface and the central passage. The apertures are uniformly spaced about a longitudinal axis of the central passage. Bow springs are mounted on the exterior side surface of the centralizer body such that a central portion of each one of the bow springs is bowed away from the centralizer body. The tubing sub is slideably positioned within the central passage of the centralizer body. One of the tubing joint collars is attached to each end portion of the tubing sub. The tubing joint collars and the centralizer body are jointly configured such that the tubing joint collars engage the centralizer body for constraining the tubing sub within the central passage of the centralizer body. | 01-28-2010 |
20110079385 | CENTRALISER SEGMENT AND CENTRALISER - A centraliser segment ( | 04-07-2011 |
20110139438 | SLEEVE ASSEMBLY FOR DOWNHOLE TOOLS - An example method comprises securing a sleeve around at least a portion of a downhole tool, deploying the sleeve and the downhole tool into a wellbore penetrating a subterranean formation, and retrieving the sleeve and the downhole tool from the wellbore. The step of securing the sleeve around the at least portion of the downhole tool may be performed at the well site. | 06-16-2011 |
20110146971 | Low Clearance Centralizer and Method of Making Centralizer - A bow-spring centralizer ( | 06-23-2011 |
20110168388 | BOREHOLE CASING CENTRALISER - A centraliser segment ( | 07-14-2011 |
20110186289 | Expandable Centralizer For Expandable Pipe String - A close-tolerance expandable bow spring centralizer | 08-04-2011 |
20110214854 | ATTACHMENT OF CONTROL LINES TO OUTSIDE OF TUBULAR - Disclosed is a downhole apparatus including a tubular and at least one line passage extending along an outer surface of the tubular. At least one end clamp is located at least one end of the line passage. The at least one end clamp includes a clamp body and at least one standoff located between the clamp body and the outer surface of the tubular defining a clamp protected space therebetween. Further disclosed is a downhole tubular system including a least two tubular apparatus, each tubular apparatus including at least one tubular and at least one line passage extending along an outer surface of the tubular. At least one end clamp is located at least one end of the line passage. The tubular system further includes at least one coupling clamp disposed at a coupling of the at least two tubular apparatus. | 09-08-2011 |
20120037358 | Stroker Device - A stroker device for use in a borehole in the ground is disclosed. The stroker at least comprises an actuator arranged for displacing a tool in a longitudinal direction of the borehole, and grippers arranged to anchor the stroker to the wall of the borehole, alternatively to a pipe wall, wherein the stroker is provided with driving wheels or driving belts for propulsion. | 02-16-2012 |
20120061076 | Stop Collar for Tubulars - Embodiments of the disclosure may provide a stop collar for tubulars, wherein the collar includes an annular stop collar member formed from at least one collar segment, and a weld joint attaching each of the at least one collar segments together, each of the weld joint(s) having a head and stem, wherein in certain embodiments the head has a width that is generally greater than the stem. | 03-15-2012 |
20120138288 | RIGID CENTRALIZER - Embodiments of the disclosure provide a rigid centralizer having at least one annular band with radially extending embossed flutes spaced around an outer surface of the at least one annular band and a plurality of elongated connecting posts welded to an inner surface of the at least one annular band to form a tubular receiving annulus. | 06-07-2012 |
20120138289 | DOWNHOLE CENTRALISER - A downhole centraliser arranged to receive a downhole tubular has a tubular body with opposed ends and is formed of plastics material A respective end ring is mounted in the or each opposed end and is formed of a plastics material having a Youngs Moldulus no greater than that of the tubular body. | 06-07-2012 |
20120186808 | Composite Bow Centralizer - A centralizer comprises a first collar, a second collar, a plurality of bow springs coupling the first collar to the second collar, and a plurality of particulates disposed on an outer surface of at least one bow spring. One or more of the first collar, the second collar, and the bow springs comprises a composite material. In some embodiments, the centralizer comprises a third collar, wherein the plurality of bow springs comprise a first portion of bow springs and a second portion of bow springs, and wherein the first portion of the bow springs couple the first collar to the third collar and the second portion of the bow springs couple the second collar to the third collar. | 07-26-2012 |
20120205093 | Instrument for Centering Tools Within a Wellbore - A downhole controller for aligning downhole tools including a body extending between an upstream portion and a downstream portion, wherein a longitudinal axis of the body is coincident with the longitudinal axis of a borehole. First and second springs are disposed proximate the upstream and downstream portions, respectively. A first bulkhead is disposed around the upstream portion and a second bulkhead is disposed around the downstream portion. The first bulkhead having a first plurality of ribs extending outwardly therefrom to define an upper recess spaced from a middle recess and the second bulkhead having a second plurality of ribs extending outwardly therefrom to define a bottom recess. A linkage bar system is coupled to the upper, middle, and bottom recesses disposed around the body, wherein the linkage bar system includes first through third linkage bars, a roller support plate, and a roller. A coupling is coupled to the body and adapted to suspend a tool from the body, wherein the linkage bar system is adapted to compress of at least one of the first and second springs when the roller is obstructed by an interval in a borehole. | 08-16-2012 |
20120227959 | EXPANDABLE CENTRALIZER FOR EXPANDABLE PIPE STRING - A close-tolerance expandable bow spring centralizer | 09-13-2012 |
20120285679 | METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE - A centralizer for an oil well drill casing including at least one strip of ceramic or plastic material applied onto an outer wall of the casing. | 11-15-2012 |
20130081802 | INTEGRAL CENTRALISER - A method of providing at least one projection ( | 04-04-2013 |
20130153208 | Downhole Tool Retainer And Guide Ring And Methods Of Fabricating The Same - A retainer and guide ring includes a first ring half and a second ring half that when placed adjacent to one another forms a complete ring. The retainer and guide ring also includes a kerf that is formed between ends of each of the first and second ring halves, which ranges from about zero inches to about 0.010 inches. In some exemplary embodiments, the retainer and guide ring is formed by obtaining two identical rings and making a cut along an edge of the diameter on each ring thereby forming a larger ring arc and a smaller ring arc for each of the rings. The two larger ring arcs are used to form the retainer and guide ring. In another exemplary embodiment, the retainer and guide ring is formed by obtaining a single ring and making a cut along the diameter. | 06-20-2013 |
20130160993 | WEDGE RING FOR ATTACHING CENTRALIZERS - A wedge ring is provided for securing a centralizer or other structure to a tubular element. The wedge ring comprises a first surface comprising a plurality of teeth configured to engage a surface of the tubular element. The wedge ring also comprises a second surface that is threaded to engage a complementary threaded surface of the centralizer or other structure. | 06-27-2013 |
20140034295 | METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE - A centralizer for an oil well drill casing including at least one strip of ceramic or plastic material applied onto an outer wall of the casing. | 02-06-2014 |
20140151026 | CASING CENTRALIZER AND METHOD OF MANUFACTURING SAME - A casing centralizer and method according to which a body covers at least a portion of a frame. In an exemplary embodiment, the body is overmolded around the frame. In an exemplary embodiment, the casing centralizer centralizes a casing within a wellbore to facilitate oil and gas exploration and production operations. | 06-05-2014 |
20140182839 | LOW-CLEARANCE CENTRALIZER AND METHOD OF MAKING CENTRALIZER - A stop collar and a centralizer assembly including the stop collar are provided. The collar includes a first portion, and a second portion coupled with the first portion such that the first and second portions are slidable one relative to the other along a longitudinal axis of the collar. The collar is axially expandable by sliding the first portion relative to the second portion. The collar also includes an anchor coupled with the second portion. The anchor defines one or more anchor windows extending therethrough and configured to expose a portion of a tubular when the tubular is received through the collar. The anchor is configured to bear on an anchoring material received radially inwards through the one or more anchor windows. The anchor does not force the anchoring material into engagement with the tubular when the tubular is received through the collar, the anchoring material being coupled with the tubular. | 07-03-2014 |
20140262216 | FRICTION REDUCING DOWNHOLE ASSEMBLIES - A friction reducing assembly has a substantially cylindrical body member having an outer surface and friction reducing elements, such as ball transfer units or other omni-directional rolling-element bearing assemblies, disposed along such outer surface. The friction reducing assembly can take many different configurations including a rolling sub assembly, a mule shoe assembly or a centralizer assembly having an adjustable outer diameter. | 09-18-2014 |
20140338893 | Composite Bow Centralizer - A centralizer comprises a first collar, a second collar, a plurality of bow springs coupling the first collar to the second collar, and a plurality of particulates disposed on an outer surface of at least one bow spring. One or more of the first collar, the second collar, and the bow springs comprises a composite material. In some embodiments, the centralizer comprises a third collar, wherein the plurality of bow springs comprise a first portion of bow springs and a second portion of bow springs, and wherein the first portion of the bow springs couple the first collar to the third collar and the second portion of the bow springs couple the second collar to the third collar. | 11-20-2014 |
20140345853 | Composite Bow Centralizer - A centralizer can be produced from a process comprising forming a plurality of composite bow spring from a fiber and a resin, curing the composite bow springs in a desired shape to form a plurality of cured bow springs, disposing a first portion of a resin-wetted fiber about a cylindrical mandrel to form a plurality of collars, disposing the plurality of cured bow springs onto the mandrel with the bow spring ends in contact with the first portion of resin-wetted fiber, disposing a second portion of the resin-wetted fiber about the cylindrical mandrel, curing the collars to form a cured centralizer, and pressing the mandrel out of the cured centralizer. | 11-27-2014 |
20150129200 | SLIM-LINE CASING CENTRALIZER - A casing centralizer having a multiplicity of support fingers positioned on a body of the casing centralizer each finger formed into a collapsible spring configured to support a predetermined load at an apex of the finger, each finger having a leading forward angle positioned downhole and a following aft angle positioned uphold and a landing tab positioned on an end of the finger adjacent the aft angle, the body includes a finger pocket which guides the landing tab with the finger collapses due to side loads. | 05-14-2015 |
20150354291 | EASY-START CENTRALIZER WITH ASYMETRICAL BOW SPRINGS - An easy-start centralizer having asymmetrical bow springs defining a more gradual lead-in angle and a steeper retreat angle to reduce the required insertion and running forces. The reduced-slope approach of the bow spring centralizer provides for smoother, more controlled compression and engagement of the bow springs with the casing opening or other wellbore restriction. | 12-10-2015 |
20150361732 | INDEXABLE TUBING STABILIZER AND PROTECTOR - An indexable tubing stabilizer and protector to support a plurality of elongated structures around a portion of production tubing comprising an elongated body, where the elongated body includes a pair of lateral portions and a central portion; a clamp within each lateral portion, where the clamp is C-shaped and envelops the production tubing; a central clamp within the central portion, where the central clamp receives the production tubing; and an opening running along the elongated body, within the pair of lateral portions and the central portion, where the opening receives the plurality of elongated structures to protect them from wear against the production tubing. | 12-17-2015 |
20150368990 | CENTRALIZER WITH COLLABORATIVE SPRING FORCE - A centralizer for centralizing a pipe is provided which collaborates the spring force of its bow springs. The centralizer includes a pair of end collars, and at least one center collar. Each of the collars has a center hole for coaxially receiving a pipe. In addition, the centralizer includes a plurality of longitudinally extending and arcuate bow springs having ends which affix to the end collars. The centralizer includes linkage arms which connect the center collar to the bow springs. The linkage arms may provide additional outward spring force against the bow springs. Preferably, the centralizer includes a mechanism for forcing the bow springs radially inward from their at rest position. | 12-24-2015 |
20150368991 | WELL CENTRALIZER - A centralizer assembly having a tubular body member with upper and lower channels extending around the external surface of said central tubular body member. A bow spring assembly having bow spring members is installed around the outer surface of the tubular body member and can rotate about the outer surface of the central tubular body member. Bow spring heel supports prevent the bow spring members from contacting the outer surface of the central tubular member when compressed. Non-abrasive materials prevent damage to wellhead or other polished bore receptacles. A robust bolster frame protects the centralizer assembly during shipping, storage or other periods of non-use. | 12-24-2015 |
20160060973 | CENTRALIZER - A centralizer having a hollow cylindrical body that includes an exterior surface. The centralizer includes a first centralizer blade protruding from the exterior surface of the hollow cylindrical body and has a first contact pad defined by a region of peak protrusion, wherein the first contact pad is positioned at a first vertical position on the body. The first centralizer blade is a ridge having a flat top. The centralizer includes a second centralizer blade protruding from the exterior surface of the hollow cylindrical body and has a second contact pad defined by a region of peak protrusion positioned at a second vertical position on the body, wherein the second vertical position does not vertically overlap with the first vertical position of the first contact pad. | 03-03-2016 |
20160060974 | CENTRALIZER AND ASSOCIATED DEVICES - A centralizer, a device and a system are disclosed. The centralizer has a longitudinal axis, and comprises first and second opposing end collars positioned around the axis of the centralizer, and a plurality of spring bows extending from the first end collar via a generally convex curved portion to the second end collar, wherein a radial distance from an outwardly facing portion of the first end collar to the axis is: greater than a radial distance from a first outwardly facing portion of a spring bow of the plurality of spring bows, at a longitudinal axial position where the spring bow extends from the first end collar, to the axis, and less than a radial distance from a second outwardly facing portion of the spring bow, at a longitudinal axial position between the first end collar and the second end collar that is farthest from the axis, to the axis. | 03-03-2016 |
20160160579 | SUCKER ROD GUIDE - A sucker rod guide includes a body defining an axial aperture surface defining screw threads for engagement with screw threads of a rod insertable into the aperture. | 06-09-2016 |
20160177635 | Coupling Mounted Spin-through Rod Centralizer | 06-23-2016 |
20160186505 | TURNED-DOWN CENTRALIZER SUB ASSEMBLY - A centralizer assembly and method for manufacturing a centralizer assembly. The centralizer assembly includes a mandrel including a first raised region having a first diameter, and a turned-down region having a second diameter, the second diameter being smaller than the first diameter. The centralizer assembly also includes a first stop segment extending at least partially around the mandrel in the turned-down region, and a centralizer disposed at least partially in the turned-down region. The first stop segment is received between axial extents of the centralizer, to limit a range of motion of the centralizer relative to the mandrel. | 06-30-2016 |
20220136340 | PRECISION-CUT CASING TUBULAR FOR CENTRALIZER ASSEMBLY - A method and downhole tool assembly, of which the method includes measuring a thickness and a location of an outer diameter surface of the tubular at a plurality of transverse planes of the tubular, simulating a cutting process to determine a position for the outer diameter surface of the tubular in a lathe, such that, after the cutting process that was simulated is conducted, the thickness of the tubular is greater than a minimum thickness and an outer diameter defined by the outer diameter surface of the tubular is less than or equal to a maximum diameter, positioning the tubular in the lathe based on the simulation of the cutting process, cutting the outer diameter surface of the tubular to reduce the outer diameter thereof to at most the maximum diameter and thereby form a turned-down region, and positioning the downhole tool on the tubular in the turned-down region. | 05-05-2022 |
166241700 | Removably secured by a fastener (e.g., pin) parallel to tubing | 3 |
20080264629 | Field-Assemblable Bow-Spring Casing Centralizer and Method of Making A Centralizer - A casing centralizer is provided that may be shipped unassembled and is then assemblable at a well site. According to one embodiment, first and second collars each have a plurality of circumferentially spaced aligning slots and a corresponding plurality of threaded, extruded through-holes. A plurality of bow-springs each have a foot at each end. Each bow-spring axially extends between the first and second collars. The foot at one end of each bow-spring is disposed in one of the aligning slots of the first collar, and the foot at the other end is disposed in one of the aligning slots on the second collar. A plurality of threaded fasteners corresponding in number to the threaded extruded through-holes secure the ends of the bow-springs to the threaded extruded through-holes. The extruded through-holes have a flange height greater than a collar thickness adjacent to the extruded through-holes. The increased flange height allows more threads to be formed within the extruded holes, resulting in a stronger threaded connection with the threaded fasteners, and a correspondingly stronger, more durable centralizer. The foot is retained within the aligning slot to reinforce the coupling between the bow-spring and the collar. A method of manufacturing the casing centralizer is also provided. | 10-30-2008 |
20140345854 | METHOD FOR MAKING CENTRALIZERS FOR CENTRALISING A TIGHT FITTING CASING IN A BOREHOLE - A centralizer for an oil well drill casing including at least one strip of ceramic or plastic material applied onto an outer wall of the casing. | 11-27-2014 |
20150083396 | TOOL ASSEMBLY APPARATUS AND METHOD - An apparatus, comprising a body extending in an axial direction, a sleeve for the body, and locking means for locking the body and the sleeve. The body and the sleeve comprise complementary mating protrusions and recesses configured to positively interlock the body and the sleeve in the axial direction and configured to positively interlock the body and the sleeve rotationally by the locking means positively engaging the recesses in both the body and the sleeve. A method for fixing axially and rotationally a sleeve to a body, wherein the body extends in an axial direction, comprising the steps of: sliding in the axial direction the sleeve onto the body, positively interlocking the body and the sleeve in the axial direction by rotating the sleeve relative to the body, and positively interlocking the body and the sleeve rotationally by sliding in the axial direction locking means into the body and the sleeve, the locking means comprising extensions positively engaging recesses in both the body and the sleeve. Use of the apparatus or method as above for attaching external tool elements or tool components for operations done in connection with open holes, risers, marine risers, wellbores, casings, or liners. | 03-26-2015 |