| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 405224200 | By riser pipe | 64 |
| 20080213048 | Method for fabricating and transporting an integrated buoyancy system - A buoyancy system includes a plurality of buoyancy joints distributed along a riser system. Each joint can include a riser pipe, an external frame disposed around a riser and a vessel, and a buoyant cladding disposed between the vessel and the frame. | 09-04-2008 |
| 20080304916 | PULL-STYLE TENSIONER SYSTEM FOR A TOP-TENSIONED RISER - A tensioner system for a top-tensioned riser in a floating platform includes a hydro-pneumatic tensioner assembly resiliently mounted to the floating platform, and a riser support conductor surrounding the riser coaxially, wherein the support conductor conveys a pull-type tensional force from the hydro-pneumatic tensioner assembly to the riser through a riser conductor coupling assembly that engages the tensioner assembly and the riser support conductor to convey the tensional force. A riser tension joint support assembly conveys the tensional force from the riser support conductor to a riser tension joint on the riser. The tensioner assembly compensates for relative platform motion including pitch, heave, and yaw. Also a reactive load assembly is mounted to the platform and reacts to a two-point dynamic bending moment imposed on the riser support conductor, while resisting riser support conductor rotation. | 12-11-2008 |
| 20090080982 | Bend Stiffener - A bend stiffener ( | 03-26-2009 |
| 20090208295 | Drilling rig riser identification apparatus - A riser having a riser body having an interior surface, an exterior surface, and two spaced-apart ends, at least one identification assembly on the riser body, the identification assembly having an assembly body and a wave energizable apparatus in the body, the assembly body having an interior surface, an exterior surface, and a channel therethrough in which is positioned part of the riser body, the assembly body releasably secured on the riser body, and the wave energizable apparatus positioned within the assembly body. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b). | 08-20-2009 |
| 20090297277 | Hybrid riser tower and method of installation thereof - A method of installing a subsea structure, such as a hybrid riser tower ( | 12-03-2009 |
| 20100014922 | VIV AND/OR DRAG REDUCTION DEVICE INSTALLATION SYSTEMS AND METHODS - There is disclosed a system comprising a structural element; a transport tool carrying a plurality of VIV and/or drag reduction devices; and an installation tool adapted to remove a VIV and/or drag reduction device from the transport tool and to install the device around the structural element. | 01-21-2010 |
| 20100028086 | GUIDE ARRANGEMENT - Guide arrangement for marine risers, in particular for offshore oil and gas operations. The guide arrangement has at least one guide structure ( | 02-04-2010 |
| 20100086365 | SYSTEM AND METHOD FOR DEPLOYMENT OF A COLD WATER PIPE - A cold water pumping system comprises a center tube and a cold water pipe surrounding the center tube. The cold water pipe is supported from a bottom end of the center tube and an impeller is coupled to the bottom end of the center tube. The impeller is operable to move water through the cold water pipe, wherein the cold water pipe is comprised of a plurality of segments. Each segment of the cold water pipe comprises at least two frame sections configured to be coupled together to surround the center tube and a removable skin configured to be inserted throughout the perimeter of the at least two sections. | 04-08-2010 |
| 20100111614 | UNDERWATER BUOY WITH MODULAR MEMBERS - An underwater buoy for hanging a duct between a sea bed and the surface, the buoy including a frame and a plurality of modular members mounted in the frame, the modular members extending between their two opposite modular-member ends, the frame including a longitudinal body for receiving the extended tubular duct, and retainers mounted on the body for maintaining the modular members substantially parallel to the body. The retainers include two retaining structures spaced from each other along the body. The retaining structures are maintained in a fixed position relative to each other in order to hold at least one modular member. | 05-06-2010 |
| 20100172699 | Hybrid Riser Tower and Methods of Installing Same - Disclosed is a riser comprising a plurality of pipelines. In one example there are three such pipelines, extending from the seabed toward the surface and having an upper end supported at a depth below the sea surface, wherein, in one embodiment a first of said pipelines acts as a central structural core, the other pipelines being arranged around said first pipeline. In another embodiment three pipelines are arranged around a structural core. In each case, the first of said pipelines may be a fluid injection line, said other pipelines being production lines. Also disclosed is a riser having buoyancy along at least a part of its length, said buoyancy resulting in said riser having a generally circular cross-section, the circumference of which being non-contiguous. Methods of installing such risers are also are also described. | 07-08-2010 |
| 20100284750 | REMOVABLE IMPACT COVER FOR A MARINE RISER BUOYANCY MODULE - A removal impact cover ( | 11-11-2010 |
| 20110052328 | APPARATUS AND METHOD FOR PERFORMING AN INTERVENTION IN A RISER - An apparatus and method are provided for performing an intervention in a flexible riser that extends between topside and subsea locations. The method generally includes providing a composite tube and inserting a leading end of the composite tube into the flexible riser so that the composite tube extends through the flexible riser from the topside location toward the subsea location. The composite tube can be configured to deliver a material into the flexible riser, e.g., to remove a blockage formed in the riser. | 03-03-2011 |
| 20110129305 | RISER SUPPORT SYSTEM - A riser system for offshore oil and gas production for communicating systems located on the seabed with floating facilities suitable for accommodating floating facility static and dynamic offsets and motions. The riser system comprises a riser extending from the seabed to a floating facility that is supported by a hybrid support system. | 06-02-2011 |
| 20110142546 | Self-Standing Riser System Having Multiple Buoyancy Chambers - A multi-tiered self-standing riser system includes one or more intermediate buoyancy chambers configured to provide an upward lifting force on strings of associated riser assemblies. The intermediate chambers have either an open-bottomed or closed container design. The chambers can further include an auxiliary buoyant material designed to either mix with or contain pressurized fluids injected into the chambers. The self-standing riser system further includes a lower riser assembly affixed to a primary well-drilling fixture. The system also includes an upper riser assembly and one or more additional buoyancy chambers disposed in either direct or indirect communication with one another, as well as with drilling, production and exploration equipment as required by associated operations. | 06-16-2011 |
| 20110229271 | VENTING GAS - Apparatus and a method are disclosed for venting gas from an annulus region of a flexible pipe. The method includes the steps of depressurising a bore region of a flexible pipe and via at least one vent flow fluid communication path, venting gas from an annulus region of the flexible pipe into the bore region. | 09-22-2011 |
| 20110280667 | HYBRID RISER TOWERS AND FABRICATION THEREOF - Disclosed is a riser tower structure including a plurality of elongate objects. The riser tower structure is provided with blocks preferably of buoyant material, along at least part of its length. The blocks provide the riser tower with a substantially circular cross-sectional profile, wherein one or more strakes are provided on the outside of the blocks. the strakes in a main embodiment are helical. Also disclosed is a corresponding method of constructing such a riser tower structure. | 11-17-2011 |
| 20110286806 | Docking and Drilling Stations for Running Self-Standing Risers and Conducting Drilling, Production and Storage Operations - A sea vessel exploration and production system is provided, wherein the system includes a drilling station formed from at least one section of a first sea vessel hull; and a docking station, which is also formed from at least one section of a second sea vessel hull. A mooring system suitable for connecting the drilling station to the docking station is also provided. Means for anchoring the vessels to the seafloor, and for attaching them to turret buoys, are also considered. Various exploration and production packages, as well as equipment required to deploy and control a self-standing riser system in either deep or shallow waters, are also described. | 11-24-2011 |
| 20110318114 | METHOD AND APPARATUS FOR FASTENING A BLOWOUT PREVENTER (BOP) STACK CONTAINMENT ASSEMBLY TO AN OCEAN FLOOR - A valve assembly is described for containing an oil spill caused by a defective blowout preventer. The valve assembly may include a hollow cavity having a floor, a ceiling and a wall, and a valve that protrudes through the ceiling and the floor of the hollow cavity. The hollow cavity may be configured to be reinforced by filling the hollow cavity with cement. The valve assembly may have a cylindrical geometric configuration. The valve may be configured to be maintained in an open position while the valve assembly is lowered below a surface of an ocean. The valve assembly may be positioned above a blowout preventer located on a floor of the ocean. | 12-29-2011 |
| 20120282036 | UNDERWATER STRUCTURE, CONSTRUCTION METHOD THEREFOR, AND DESIGN METHOD AND RENOVATION METHOD OF UNDERWATER-SIDE STRUCTURE - This underwater-side structure is installed at the sea bed, and supports an above-water structure that is provided above the water, being provided with a first support member made of steel that extends from the sea bed to above the water and that has a first space therein; and a filling material being filled in a portion of the first space. | 11-08-2012 |
| 20130223937 | Retractable chain connector - A mooring leg connector for use with a mooring leg ( | 08-29-2013 |
| 20130230359 | Retractable chain connector - A mooring leg connector ( | 09-05-2013 |
| 20130266381 | Transfer System - A transfer system is described comprising a subsea installation ( | 10-10-2013 |
| 20140044493 | Subsea Conduit System - A subsea conduit system comprises a conduit extending between a surface vessel and a subsea support, and a load arrangement connected between a subsea anchor and the conduit at a region of connection which is intermediate the vessel and the subsea support to apply a force on the conduit. The conduit is configured such that the applied force generates axial tension in the conduit between the region of connection and the vessel, and between the region of connection and the subsea support. | 02-13-2014 |
| 20140186124 | RISER ASSEMBLY AND METHOD - A riser assembly and method of producing a riser assembly are disclosed. The riser assembly includes a riser having a plurality of buoyancy elements provided at predetermined intervals along the length of the riser for supporting the riser, and at least one further buoyancy element arranged to support the riser in a configuration for accommodating tension changes in the riser due to vessel movement. | 07-03-2014 |
| 20140328631 | PULL TUBE STRESS JOINT FOR OFFSHORE PLATFORM - The present disclosure provides a system and method for supporting a catenary riser coupled to an offshore platform system including a pull tube and a pull tube stress joint for girth weld stress reduction and improved fatigue performance. A pull tube sleeve is coupled around a welded connection of the pull tube. The sleeve has a larger inside diameter than an outer diameter of the pull tube, and a hardenable fill material is filled into the space between the sleeve and the pull tube so that there is no annular gap between the sleeve and the pull tube. The fill material provides a supportive coupling between the sleeve and the pull tube. The sleeve, the pull tube, or both can also have one or more gripping surfaces formed in or on their surfaces to retain the fill material within the space between the sleeve and the pull tube. | 11-06-2014 |
| 20180022427 | TWIN-HULL OFFSHORE STRUCTURE COMPRISING AN INTERCONNECTING CENTRAL DECK | 01-25-2018 |
| 405224300 | Having flexible segment | 5 |
| 20100129161 | HYBRID RISER SYSTEMS AND METHODS - There is disclosed a floating system positioned in a body of water having a water bottom, the system comprising a host member floating on a surface of the water; a flotation module floating under the surface of the water; a flexible hose connecting the host member to the flotation module; and an elongated underwater line structure, comprising a top portion connected to the flotation module; a bottom portion extending to the water bottom and adapted to connect to a flowline lying on the water bottom; and at least one of the top portion and the bottom portion comprising a catenary configuration. | 05-27-2010 |
| 20130022406 | FREESTANDING HYBRID RISER SYSTEM - A free standing hybrid riser system including: a vertical section including an upper strengthening joint; a buoyant unit; a top riser assembly (TRA) below the buoyant unit and connected at a first connection point on the TRA to the upper strengthening joint; the buoyant unit is connected to the TRA at a second connection point on the TRA; and a flexible jumper is connected to the TRA at a third connection point on the TRA; wherein a first bending moment is applied about the first connection point to the TRA by the buoyant unit, and a second bending moment is applied about the first connection point to the TRA by the flexible jumper, wherein the first and second bending moments oppose each other. | 01-24-2013 |
| 20130216317 | RISER SUPPORT - Apparatus and method for supporting a riser are disclosed. The apparatus includes an anchoring element ( | 08-22-2013 |
| 20140199124 | BUOYANCY ELEMENT, RISER ASSEMBLY INCLUDING A BUOYANCY ELEMENT AND A METHOD OF SUPPORTING A RISER - A buoyancy element, riser assembly including a buoyancy element and a method of supporting a riser are disclosed. The buoyancy element includes a body of at least partly flexible structure having a volume that is adjustable between an expanded and contracted position, and an entry port for fluid to be supplied to and/or removed from the body to thereby adjust the volume of the body. | 07-17-2014 |
| 20160168920 | HYBRID REVERSE TRANSFER SYSTEM | 06-16-2016 |
| 405224400 | Having tensioner | 33 |
| 20080205992 | Soft Stop for Maximum Riser Tensioner Stroke - A riser is connected to subsea well equipment and extends to a vessel. A tubular conductor is mounted stationarily to and around the riser, the conductor passing through an opening in the vessel. A set of rollers is mounted to the vessel around the opening for engagement with the conductor as the vessel moves relative to the riser. Hydro-pneumatic cylinder units are connected between the riser and the vessel for applying tension to the riser. An external flange is located on a lower portion of the conductor. A shock absorber is positioned around the conductor and mounted to the vessel for movement relative to the conductor. The shock absorber absorbs shock when the cylinder units are in an extreme stroke position. | 08-28-2008 |
| 20090304454 | Workover Riser Compensator System - A tensioning apparatus for applying a substantially constant tension to a workover riser ( | 12-10-2009 |
| 20100047024 | RISER TENSIONER RESTRAINT DEVICE - An apparatus to restrain a riser tensioner of an offshore drilling rig includes a restraint cone configured to fit within hydraulic cylinders of the riser tensioner, a hoist configured to extend and retract the restraint cone, and a tension member extending from a lower end of the restraint cone, the tension member configured to engage a lower end of the riser tensioner and maintain a wedging action between the restraint cone and the hydraulic cylinders. | 02-25-2010 |
| 20100098498 | Anchor system for offshore dynamically positioned drilling platform - An anchor system may reduce stress on anchor cables when an offshore drilling platform weathervanes. The anchor system may hold the platform in a set position above the sea floor during drilling operations. The anchor system includes anchor cables that pass through a split bearing. Clamps may be connected to the bearing to hold the anchor cables in tension. | 04-22-2010 |
| 20100143047 | Ram Style Tensioner With Fixed Conductor and Floating Frame - A riser tensioner for an offshore floating platform has a frame stationarily mounted to the upper portion of the riser. Pistons and cylinders are spaced circumferentially around the riser and connected between the frame and the floating platform. A tubular guide member is mounted to the floating platform for movement in unison in response to waves and currents. The riser extends through the guide member. A guide roller support is mounted to and extends downward from the frame around the guide member. At least one set of guide rollers is mounted to the guide roller support in rolling engagement with the guide member as the guide member moves in unison with the platform. | 06-10-2010 |
| 20100158615 | Riser Tensioner with Shrouded Rods - A surface assembly that communicates with subsea structures and includes a working deck on a floating structure. The working deck has an aperture extending axially therethrough. A riser extends from a subsea location to the working deck and through the aperture. The surface assembly includes a frame extending circumferentially around the riser so that the frame moves axially with the riser. The assembly also includes a tensioner assembly connected between the working deck and the frame. The tensioner assembly includes a piston slidably carried in a piston chamber, a piston rod extending from the piston and away from the piston chamber, and a shroud enclosing the piston rod. The shroud has a plurality of segments with at least one of the shroud segments being movable in unison with the piston rod. | 06-24-2010 |
| 20100183376 | System, Method and Apparatus for Sleeved Tensioner Rod with Annular Adhesive Retention - A corrosion-resistant alloy tube is formed and bonded to a pre-machined steel alloy rod to form a riser tensioner cylinder rod. During assembly, an epoxy is injected into an annular space between the tube and rod and then cured. The bonded tube is ground to a desired surface finish prior to installation and utilizes a double seal arrangement that prevents external pressure or corrosive fluids from entering the cured epoxy in the annular space. | 07-22-2010 |
| 20100260556 | Ram Style Tensioner with Fixed Conductor and Floating Frame - A riser tensioner for an offshore floating platform has a frame stationarily mounted to the upper portion of the riser. Pistons and cylinders are spaced circumferentially around the riser and connected between the frame and the floating platform. A tubular guide member is mounted to the floating platform for movement in unison in response to waves and currents. The riser extends through the guide member. A guide roller support is mounted to and extends downward from the frame around the guide member. At least one set of guide rollers is mounted to the guide roller support in rolling engagement with the guide member as the guide member moves in unison with the platform. | 10-14-2010 |
| 20110170955 | Tensioning a Riser - A riser tensioner system for tensioning a riser at an offshore vessel includes a frame adapted to affix to the vessel. An elongate riser joint is provided for coupling into the riser. The riser joint has an axial flange portion projecting laterally outward therefrom from and extending axially along a length of the riser joint. Ram pistons are arranged about the frame to couple to the riser and to support the riser in tension. Centralizer arms are arranged on the frame to extend into proximity to the flange portion of the riser joint when the riser joint is received through the frame. | 07-14-2011 |
| 20110200397 | Ram Style Tensioner with Fixed Conductor and Floating Frame - A riser tensioner for an offshore floating platform has a frame stationarily mounted to the upper portion of the riser. Pistons and cylinders are spaced circumferentially around the riser and connected between the frame and the floating platform. A tubular guide member is mounted to the floating platform for movement in unison in response to waves and currents. The riser extends through the guide member. A guide roller support is mounted to and extends downward from the frame around the guide member. At least one set of guide rollers is mounted to the guide roller support in rolling engagement with the guide member as the guide member moves in unison with the platform. | 08-18-2011 |
| 20110280668 | Hang-Off Adapter for Offshore Riser Systems and Associated Methods - Hang-off adapters for use in offshore riser systems are provided that seat in a tension ring while allowing for relative rotation between the tension ring and the riser. In one embodiment, the hang-off adapter may comprise a tension ring interface configured to engage an inner landing of a tension ring, the tension ring interface being in the shape of a ring. | 11-17-2011 |
| 20120134755 | METHOD FOR INSTALLING AN OPERATING RIG FOR A FLUID IN A BODY OF WATER WITH A TRACTION UNIT - This method comprises connecting a downstream point ( | 05-31-2012 |
| 20120201611 | METHOD AND APPARATUS FOR FACILITATING HANG OFF OF MULTIPLE TOP TENSION RISER OR UMBILICALS FROM A COMPENSATED TENSIONING DECK - The disclosure provides a deck tensioning system, supporting multiple risers, that is coupled to an offshore platform and compensated for heave and horizontal movement. Such a tensioning system provides simplified access to the production trees on the risers. The tensioning system provides tensioning for a tensioning deck to which the multiple risers are coupled, while reducing the tensioning cylinders for individual risers. The deck tensioning system further provides a simplified tension flex connector (“TFC”) with an intermediate movable member for each riser. The TFC assists in absorbing and/or adjusting for forces that may cause the tensioning deck to pitch and roll from the interactions between the multiple risers coupled to the tensioning deck as a unitary structure. If a fire or other event causes damage to the tension flex connector, the tension flex connector is designed to maintain a supporting connection with the riser without the intermediate movable member. | 08-09-2012 |
| 20120207550 | MARINE RISER TENSIONER - A push-up tensioner for maintaining a tensile force in a riser having an axis couples to a floating platform and maintains the tensile force while the riser tilts variably from the vertical. The tensioner includes a plurality of cylinders having a lower end pivotally coupled to the deck. The cylinders are substantially perpendicular to the deck in the running position and at an angle to the deck in the tensioning position. After running of the riser, a placement assembly moves the cylinders from the running position to the tensioning position. A tensioner ring is run on the riser proximate to an upper end of the cylinders, and the cylinders are then automatically coupled to the tensioner ring. | 08-16-2012 |
| 20130022407 | Riser tensioner - A riser tensioner that tensions a riser extending to the seabed from a drilling ship which drills for submarine resources such as oil. The riser tensioner is disposed under a drilling ship to tension a riser used for drilling operation of submarine resources and includes a plurality of cylinders. The riser tensioner further includes: an injection nozzle for injecting water to a surface of a piston rod exposed from each of the cylinders; and a scraper unit which removes salt or seawater from the surface of the piston rod by scrapping the surface of the piston rod to prevent salt from accumulating on the surface of the piston rod. | 01-24-2013 |
| 20130022408 | Riser tensioner having oil collecting means - A riser tensioner that includes an oil collecting means and tensions a riser extending to the seabed from a drilling ship which drills for submarine resources. The riser tensioner further includes a piston rod partially inserted into each of the cylinders and reciprocating within the cylinder, a piston seal disposed between a head of the piston rod and a wall of the cylinder to provide fluid sealing, an oil collection passage extending from the head of the piston rod to an outside of the cylinder through the piston rod to allow oil leaking into the cylinder through the piston seal to be discharged from the cylinder to the outside of the cylinder through the oil collection passage, and an oil leakage detection sensor which detects oil leakage positioned on the head of the piston rod. | 01-24-2013 |
| 20130022409 | RISER TENSIONER HAVING AN EMERGENCY SEAL - A riser tensioner has an emergency seal and tensions a riser extending to the seabed from a drilling ship which drills for submarine resources such as oil. The riser tensioner is disposed under a drilling ship to tension a riser used for drilling operation of submarine resources and including a plurality of cylinders into which oil is supplied. The riser tensioner further includes a piston rod partially inserted into each of the cylinders and reciprocating within the cylinder, a piston seal disposed between a head of the piston rod and a wall of the cylinder to provide fluid sealing therebetween; an oil leakage detector detecting oil leakage through the piston seal, and an emergency seal disposed in a groove formed at an upper portion of the head of the piston rod to be compressed towards the wall of the cylinder and protrude from the head of the piston rod to prevent oil leakage through the wall of the cylinder when the oil leakage detector detects oil leakage. | 01-24-2013 |
| 20130115012 | Tensioner Cylinder Connections with Multiaxial Degrees of Freedom - A coupler having two degrees of axial freedom couples a hydro-pneumatic cylinder to a tensioner ring of a riser tensioner mounted to a platform. A post extends along an axis of the cylinder and an intermediate sleeve is disposed around the post to form a post annulus. An outer sleeve is secured to the tensioner ring and defines a cavity into which the post and intermediate sleeve are inserted so that an annulus is formed between the sleeve and the outer sleeve. The Outer sleeve is coupled to the intermediate sleeve so that the outer sleeve may pivot on the coupling between the outer sleeve and the intermediate sleeve relative to the intermediate sleeve. The intermediate sleeve is coupled to the post so that the intermediate sleeve may pivot on the coupling between the intermediate sleeve and the post relative to the post. | 05-09-2013 |
| 20130189039 | RISER SYSTEM FOR A SLACKED MOORED HULL FLOATING UNIT - A riser tensioning system with an individual riser unit on an oil or gas platform. The platform has a traveling trolley structure with at least one trolley bearing and a centralizer. The trolley bearing is coupled to at least one guide rail configured to allow vertical movement of said traveling trolley structure. The traveling trolley structure is coupled to a riser collar configured to support a top of the riser. The riser tensioning system has at least one cylinder coupled to the traveling trolley structure on one end and secured on an opposite end such that the cylinder is adapted to push or pull the traveling trolley structure vertically. | 07-25-2013 |
| 20130195559 | SEAFASTENING APPARATUS FOR A TENSIONER ASSEMBLY - A seafastening apparatus includes a movable frame having an opening configured for receiving and at least partially supporting an equipment unit. A locking device is configured for selective locking and releasing of the equipment unit and hence controlling lateral movements of the equipment unit relative to the apparatus. The locking device includes wires configured for connection to the equipment unit and tensioners configured for controlling the tension in each wire, and a pair of extendible and retractable arms are configured for conveying and guiding at least on of the wires. | 08-01-2013 |
| 20130330132 | TENSION FRAME - A tension frame ( | 12-12-2013 |
| 20140010596 | HYBRID TENSIONING OF RISER STRING - An enhanced riser control system may employ electrical tensioners coupled to a drilling riser by wires. The electrical tensioners may provide quick response to a tension controller to handle positioning of the drilling riser. The electrical tensioners of the enhanced riser control system may be combined with hydro-pneumatic tensioners in a riser hybrid tensioning system. A controller within the enhanced riser control system may be configured to distribute tension to electrical tensioners and to control electrical tensioners to adjust the length of the first and second wires. The electrical tensioners may be used, for example, to suppress vortex-induced-vibration (VIV) and control drilling riser recoil. | 01-09-2014 |
| 20140010597 | Top-Tensioned Riser System - A top-tensioned riser (TTR) is supported by a tensioning system on the deck of a floating platform. The tension ring may include an elastomeric layer which permits small angular and lateral displacements of the tension joint. The tension joint comprises a tapered section to resist the bending moment and shear imposed by the vessel's motion. The riser tension joint may be supported laterally by rollers below the tension ring. The rollers react on the tapered section when the riser strokes up and down. The tapered section may be engineered to maximize the use of the tension joint, and to reduce bending moment and shear loads imposed on the tensioning system. In certain embodiments, there may be a small gap between the rollers and the tapered section. In certain other embodiments, the rollers may be spring-loaded to increase the stability of surface equipment on the upper terminus of the riser. | 01-09-2014 |
| 20140050536 | Riser Tensioner Frame Assembly - A riser tensioner for maintaining a tensile force on a riser extending through an opening in a deck of a floating platform includes a frame assembly that may be quickly bolted together in the field. The frame assembly includes a plurality of tensioner legs that may be installed on an un-level deck yet still provide a level support of the riser. Lower leg mounting assemblies include a slip ring for mounting directly to the deck and a deck mounting member received in the slip ring at a variable angle and having an upwardly extending shaft passing into a bore in a lower end of a tensioner leg. | 02-20-2014 |
| 20140169887 | TENSIONER LATCH WITH PIVOTING SEGMENTED BASE - A tensioner assembly for applying tension to a tubular member, such as a riser, can include an upper latch connected to the tubular member, a platform with a bore, and a plurality of lower latch segments, each having a base that is pivotally connected to the platform. After applying tension to the tubular member, the segments pivot inward to form an annular lower latch ring having an inner diameter less than an outer diameter of the upper latch. The assembly can include a locking mechanism that prevents axial movement of the upper latch, relative to the lower latch ring, after engagement. The upper latch can self-center on the lower latch as it is moved into the latching position. | 06-19-2014 |
| 20140186125 | RESTRAINING DEVICE FOR A TENSIONER ASSEMBLY - An apparatus for restraining an assembly suspended by a structure on an offshore platform or vessel, includes a movable carrier configured for controllable movement on a structure of the platform or vessel. A restraining member is movably connected to the carrier via a joint and the restraining member includes an abutment region for abutment with at least one element of the assembly. An assembly-locking device is provided for selectively and releasably locking at least one element of the assembly to the restraining member. A restraining device for a tensioner assembly which is suspended by a structure on an offshore platform or vessel and extending into a moonpool, includes a pair of restraining apparatuses, arranged on opposite sides of the moonpool and individually movable on respective rails by a traction device in interaction with respective racks. | 07-03-2014 |
| 20150315853 | BUNDLED, ARTICULATED RISER SYSTEM FOR FPSO VESSEL - A method and apparatus for bundling flexible risers uses a vertically-hanging riser support shaft extending below the turret of a turret-moored FPSO to manage the motions of the risers. The risers may transition to a catenary configuration as they exit a bottom structure at the lower end of the riser support shaft and connect to wellheads or flowlines on the seafloor. Certain embodiments are suitable for use with a disconnectable buoyant turret mooring system while other embodiments may be used with spread-moored FPSOs. | 11-05-2015 |
| 20150337514 | Offshore System with Subsea Riser - An offshore system with a subsea riser, including a floating platform and a subsea riser made up of sections of pipe. A riser tension system compensates for movement of the platform while providing tension to the riser. At least two of the riser sections are connected with a connector such that a portion of the riser is able to be placed in compression without buckling. | 11-26-2015 |
| 20150368992 | Marine Riser Tensioner With Load Transferring Centralization - A tensioner for maintaining a tensile force in a riser extending from a subsea wellhead assembly to a deck of a floating platform includes a hydro-pneumatic assembly having a first section secured to the deck and a second section secured to a support frame. A pivot joint is coupled to the riser and to the support frame, so that the riser is retained axially static with respect to the support frame and is pivotable with respect to the support frame. A guide assembly has at least two guide elements, the guide elements being axially spaced from each other so that when the deck and the support frame move axially relative to each other, the guide assembly restricts relative rotational movement between the deck and the support frame. | 12-24-2015 |
| 20160024853 | DEFLECTION ABSORBING TENSIONER FRAME - An example deflection absorbing tensioner frame for a platform of an offshore vessel may include at least one metal beam supporting a tensioner. A deflection absorber may be coupled to at least one metal beam. The deflection absorber may be configured to absorb axial, rotational, and lateral deflections in a platform deck coupled to the deflection absorber. | 01-28-2016 |
| 20160145951 | ENHANCED RAM-STYLE RISER TENSIONER CYLINDER - In accordance with embodiments of the present disclosure, a ram-style riser tensioner cylinder assembly includes an outer cylinder barrel and an inner rod barrel disposed within and extending in a first direction from the outer cylinder barrel. The cylinder assembly also includes a high pressure seal disposed along a sliding interface between an end of the inner rod barrel and an inner wall of the outer cylinder barrel. In addition, the cylinder assembly includes a cap coupled to an end of the inner rod barrel extending from the outer cylinder barrel, and a fluid reservoir disposed in the cap. The fluid reservoir may be used to store and communicate fluid from the fluid reservoir to the high pressure seal for lubricating the seal. | 05-26-2016 |
| 20160194925 | HYBRID TENSIONING OF RISER STRING OPERATING WITH ENERGY STORAGE DEVICE | 07-07-2016 |
| 20160376854 | METHODS AND SYSTEMS FOR TENSIONER CONNECTION - Improved methods and systems for connecting a riser tensioner system to a riser are disclosed. A system for coupling a tensioner cylinder to a riser includes a top pin connection disposed at a first distal end of the tensioner cylinder. The top pin connection couples the tensioner cylinder to a platform. The tensioner cylinder includes an extension rod and a bottom pin connection is disposed at a second distal end of the tensioner cylinder on the extension rod. A tension ring is coupled to the riser. An adjustable linkage system is coupled to the tensioner cylinder and includes an attachment mechanism and a positioning mechanism. The adjustable linkage system is operable to couple the tensioner cylinder to the tension ring. | 12-29-2016 |
