| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166550200 | Perforating or splitting cutter | 21 |
| 20090071640 | Device for cutting a vertical slot-like unloading opening - A device is provided for creating vertical slot-like unloading openings approximate to a well, comprising: a casing pipe enclosed into the well, a generator of abrasive hydro-jets, a column for delivering the hydro-jets, a hydraulic brake, a perforator descended into the casing pipe including a pair of nozzles for creating the hydro-jets, a pair of centralisers mounted on the perforator, and a pair of cutting rotating discs, mounted under the pair of nozzles on racks, partially springly retractable and projectable depending on hydro-jet pressure. Additional embodiments include: designing turnable racks, mounting the centralisers on similar projectable and retractable racks, installing an additional pair of centralisers, selecting their installation places, setting predetermined ranges of the racks projection and retraction in static and perforation modes. The innovations allow for accelerated cutting of the casing pipe, improving accuracy of the openings, and increasing durability and reliability of the device. | 03-19-2009 |
| 20090084535 | APPARATUS STRING FOR USE IN A WELLBORE - An apparatus string for use in a wellbore is disclosed comprising a plurality of activation modules having first and second ends and containing devices to be activated/initiated downhole. An apparatus string according to the present invention also comprises a plurality of initiator modules where at least initiator is operatively connected to each activation module and is addressable. Each initiator module may comprise a safety initiator which when the initiator module is addressed initiates the firing of the shaped charges in the gun module to which it is operatively connected. A wireless transmitter is provided which is operatively connected in and integral to the apparatus string for use in transmitting signals to address any initiator module in the apparatus string. An apparatus string according to the present invention may be especially useful in perforating operations. | 04-02-2009 |
| 20090229813 | SYSTEM FOR INJECTING A SUBSTANCE INTO AN ANNULAR SPACE - A system for injecting a substance into the annular space surrounding a well tubular with an assembly to be inserted into a well tubular. The assembly includes a cutting part capable of making a hole through a well tubular; a substance chamber for storage of the substance and a substance injecting part capable of injecting the substance into the annular space. The system includes a cutting part having a chamber with a first end and a second end and having a wall surrounding the chamber and including at least one entrance for substance at the first end and including an exit for delivery through the well tubular and into the annular space at the second end. | 09-17-2009 |
| 20100276136 | INTERNALLY SUPPORTED PERFORATING GUN BODY FOR HIGH PRESSURE OPERATIONS - A perforating system having a perforating gun with a high pressure gun body. The gun body can be thickened so that no empty space is present between it and a corresponding gun tube. Alternatively, the gun body could be a solid cylinder with slots radially formed therein to receive a shaped charge. In another embodiment, a flowable material, such as foam, fluid, sand, ceramic beads, eutectic metal, and combinations thereof, is provided in the space between the gun body and gun tube. | 11-04-2010 |
| 20100300673 | SIDE TRACK BIT - A drill bit for cutting casing employing a plurality of discrete, abrasive particulate-impregnated cutting structures having TSP cutting structures therein extending upwardly from abrasive particulate-impregnated blades, which define a plurality of fluid passages therebetween on the bit face. Additional cutting elements may be placed in the inverted cone of the bit surrounding the centerline thereof. | 12-02-2010 |
| 20110088889 | PERFORATING CHARGE FOR USE IN A WELL - A perforating charge for use in a wellbore includes an explosive and a liner to be collapsed by detonation of the explosive. The liner includes at least a first liner portion and a second liner portion which have different cohesiveness. | 04-21-2011 |
| 20110120695 | PERFORATING GUN GRAVITATIONAL ORIENTATION SYSTEM - A perforating gun gravitational orientation system includes a perforating gun and a swivel device connected to the perforating gun to permit rotation of the perforating gun within casing, and the perforating gun spaced apart from the casing by the swivel device. Another perforating gun gravitational orientation system includes the swivel device having an axis of rotation which is spaced apart from a center of gravity of the perforating gun. Yet another perforating gun gravitational orientation system includes the swivel device having an axis of rotation which is spaced apart from a center axis of the perforating gun. | 05-26-2011 |
| 20110272134 | HIGH FREQUENCY SURFACE TREATMENT METHODS AND APPARATUS TO EXTEND DOWNHOLE TOOL SURVIVABILITY - A downhole device with compressive layer at the surface thereof. Such devices may be particularly well suited for survivability in the face of potentially long term exposure to a downhole environment. Techniques for forming protective compressive layers at the surfaces of such devices may include positioning devices within a chamber for bombardment by high frequency particles. As a manner of enhancing the compressive layer thickness and effectiveness, low temperature conditions may be applied to the device during the high frequency treatment. | 11-10-2011 |
| 20120118557 | Methods and Devices for One Trip Plugging and Perforating of Oil and Gas Wells - A tubing conveyed tool for use in perforating a well bore utilizing abrasive perforating techniques. The perforating tool is particularly useful in non-vertical wells. The perforating tool is designed to permit running and setting a bridge plug, and then perforating the well bore without requiring the removal of the tool string. An eccentric weight bar can also be used to allow for directional perforating in non-vertical wells. The eccentric weight bar uses gravity to cause the bar to rotate to a predetermined position. | 05-17-2012 |
| 20120138286 | PERFORATING SAFETY SYSTEM AND ASSEMBLY - Perforating assemblies and perforating safety systems capable of being disposed in a wellbore for hydrocarbon fluid production are described. The perforating assemblies can include an isolation device that is capable of preventing a denotation train when the assemblies are in a first orientation and allowing a denotation train when the perforating assemblies are in a second orientation. The isolation device can be automatically reoriented or reconfigured upon a change in the orientation of the perforating assembly. | 06-07-2012 |
| 20130008639 | ELECTROMECHANICAL ASSEMBLY FOR CONNECTING A SERIES OF PERFORATING GUNS FOR OIL AND GAS WELLS - Mechanical connector for the connection and assembly of guns used in the perforation of petroleum producing wells. Each gun has a hollow cylindrically shaped housing whose ends have threaded joints. Explosive shipped-charges are radially set in respective peripheral slots of the gun. Guns are coaxially joined in vertical position within the casing of the well, forming an assembly that includes the firing head and a bottom sub. The joints between consecutive guns and between the bottom sub and the lowermost gun, include tubular adaptor pieces and intermediaries that have respectively a threaded joint end and an opposing end constituted by a bayonet-type locking joint formed by a single reinforced latching bayonet locking tab. | 01-10-2013 |
| 20130319651 | CUTTING UNIT OF A HYDROMECANICAL SLOT PERFORATOR - The proposed hydro-mechanical slot-type perforator enables simultaneously performing at least two slots in a production column. The perforator includes a casing, upper and lower pistons movable within the casing, a cutting unit driven by the pistons and carrying extendable cutting tools, and, optionally, a retractable mechanism fixing the perforator for transportation. The extension is provided by rotatable shackles, or balance beams, or a combination thereof. The lower piston is moved by pressurized fluid supplied through hydraulic channels or a hydraulic system, made in the casing. The shackles rotate around axles being spaced apart, or coincided. The cutting tools can be mounted on the shackles' movable parts, and, when mutually interacted, oppositely extend the cutting tools during countermovement of the pistons. The cutting tools can be mounted in the balance beam's shoulders, or can represent sharp edges thereof. The shackles and balance beams can have wedge-shaped portions, grooves, and connecting rods. | 12-05-2013 |
| 20140060802 | METHOD AND APPARATUS FOR DELIVERING HIGH POWER LASER ENERGY OVER LONG DISTANCES - Workover and completion systems, devices and methods for utilizing 10 kW or more laser energy transmitted deep into the earth with the suppression of associated nonlinear phenomena. Systems and devices for the laser workover and completion of a borehole in the earth. These systems and devices can deliver high power laser energy down a deep borehole, while maintaining the high power to perform laser workover and completion operations in such boreholes deep within the earth and at highly efficient rates. | 03-06-2014 |
| 20140083674 | CUTTING UNIT OF A SLOT PERFORATOR (VARIANTS) - A cutting unit for a slot-type perforator is mounted in a casing, driven by a pusher, containing cutting tools with an extension mechanism for extending thereof, including a holder fixed to the pusher and another holder fixed to the casing. The holders are capable of rotating, causing an extension and retraction of the cutting tools from and to the casing. The extension mechanism includes a balance beam, having shoulders for placing the cutting tools and being assembled in the casing between the holders. The beam rotates around an axle during interaction with the holders. The axle is adapted to move along the longitudinal axis of the casing, e.g. in a groove arranged therein. The cutting unit may include at least two balance beams sequentially mounted between the holders. The cutting unit can be equipped with a retractable mechanism bringing parts thereof into a transportation position and fixing them therein. | 03-27-2014 |
| 20140096947 | Cutting and Pulling Tool with Double Acting Hydraulic Piston - A cutting and pulling tool has a piston responsive to flow therethrough with an orifice to create backpressure to drive the piston uphole to rotate the blades outwardly such as in an expanded section of tubular below a transition from a smaller tubular dimension. The extended cutters are pulled to the transition and an overpull determines that the desired location has been reached. The overpull force is removed and fluid flow and rotation is commenced to cut. The blades extend to a position perpendicular to the tool axis so that they are supported off a radial housing surface as the weight of the cut string above is supported on the blades. The string is pulled up and supported with slips on a rig floor at which point weight is slacked off and a plug is landed in the top of the piston to push it down to remove the tool. | 04-10-2014 |
| 20140124191 | DOWNHOLE TUBING CUTTER TOOL - The present invention relates to a downhole tubing cutter tool for submerging into a casing in a wellbore and separating an upper part of the casing from a lower part of the casing by cutting the casing from within, the tool extending in a longitudinal direction, comprising a tool housing having a first and a second housing part, 100 a cutting arm which is pivotably connected with the first housing part and has a cutting edge in a first end, said arm being movable between a retracted position and a projected position in relation to the tool housing, an arm activation assembly for moving the cutting arm between the retracted position and the projected position, and a rotatable shaft arranged in the second housing part and connected with the first housing part for rotating the cutting arm. | 05-08-2014 |
| 20140231065 | PERFORATING SAFETY SYSTEM AND ASSEMBLY - Perforating assemblies and perforating safety systems capable of being disposed in a wellbore for hydrocarbon fluid production are described. The perforating assemblies can include an isolation device that is capable of preventing a detonation train when the assemblies are in a first orientation and allowing a detonation train when the perforating assemblies are in a second orientation. The isolation device can be automatically reoriented or reconfigured upon a change in the orientation of the perforating assembly. | 08-21-2014 |
| 20150337613 | METHOD AND APPARATUS FOR MILLING A ZERO RADIUS LATERAL WINDOW IN CASING - A flexible milling assembly for milling an orifice through a well casing. The milling assembly can include a drive yoke, and a plurality of straight and split yoke assemblies—all linked together and to a cutter head with universal blocks that enable the components to pivot relative to each other. A string of joint tubing connected to a prime mover on the surface is used to lower the milling assembly into a well and supply the driving torque. A split shoe coupled to a guide tube is positioned within the well casing where the orifice is to be milled. The milling assembly is guided through a curved passage within the split shoe to bring the cutter head into contact with the well casing. A protector assembly can be provided to enclose and protect the milling assembly when it is tripping into and out of the well casing. | 11-26-2015 |
| 166550300 | Wedge or cam actuated | 3 |
| 20090211745 | Non-explosive tubing perforator - An improved perforating apparatus that creates drain holes in well tubing without the use of explosives. A hydraulically-activated apparatus created from machined metal pipes and solid metal bars that form four main sections, a hollow metal pipe | 08-27-2009 |
| 20130312949 | CUTTING UNIT OF A HYDROMECHANICAL SLOT PERFORATOR - A cutting unit for a slot-type perforator is mounted in a casing having a specific edge, driven by a piston or plunger. The cutting unit includes cutting tools associated with a first holder immovable relative to the piston, and a second holder, including a recess, cooperating with the casing's edge, immovable relative to the casing. The holders move relative to each other causing extending and retracting the cutting tools in opposite directions, during piston's movements. The cutting unit includes a retractable mechanism to bring its parts into a transportation position and to fix them therein. The retractable mechanism includes a guide groove made in the second holder, and a connecting rod attached to the first holder. The rod moves through the groove ensuring the return of the second holder into the transportation position, wherein it is fixed absent pressure upon the piston, caused by interaction of the edge and recess. | 11-28-2013 |
| 20140311729 | HYDROMECHANICAL SLOT PERFORATOR (VARIANTS) - The proposed hydro-mechanical slot perforator for well drilling is a device designed for opening productive formations in at least two projections forming high quality slots. The perforator includes a casing, housing a piston-pusher, and a cutting assembly, located below the piston-pusher, including extendable cutting tools and a mechanism for extending thereof, formed as a double-arm (lower and upper) lever (or a balance beam), whose arms hold the cutting tools. A deflecting wedge is mounted on a mobile shaft under the lever. The shaft rotates when the lower arm interacts with the wedge, while the piston-pusher moves down. The piston-pusher is designed as a wedge-piston acting on the upper arm, extending the top cutting tools out, resulting in the wedge-piston and the deflecting wedge creating oppositely directed forces acting simultaneously upon the upper and lower arms. Another embodiment is proposed where an augmented cutting assembly includes more than two cutting tools. | 10-23-2014 |
