Tension Leg Platform Patents (Class 405/223.1)
  • Patent number: 10843907
    Abstract: A hoisting system for the installation of a wind turbine wherein said hoisting system comprises measures to achieve a load bearing connection to the tower of the wind turbine and comprises measures to move the hoisting system up and down along the tower wherein the hoisting system, when it is fixed to an already installed part of the wind turbine tower with said load bearing connection, is arranged to install or remove any of a tower segment, a nacelle, a generator, a hub, and a blade in one or more combined hoists or in a single hoist.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: November 24, 2020
    Assignee: LAGERWEY WIND B.V.
    Inventors: Hendrik Lambertus Lagerweij, Andre Heinz Pubanz, Aart Van De Pol, Albért Waaijenberg, Gustave Paul Corten
  • Patent number: 9415842
    Abstract: This floating support (1) for an offshore structure, in particular such as a wind turbine, of the type including means in the form of a support mast (2), the upper part of which is associated with the structure and the lower part of which is associated with means in the form a float (3), is characterized in that the means in the form a float (3) comprise means in the form of a cage (9, 10, 11) for receiving buoyancy tanks (12).
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: August 16, 2016
    Assignee: DCNS
    Inventors: Philippe Thieffry, Cyrille Jacques Moiret
  • Patent number: 9187269
    Abstract: Polymeric pipe loaders and polymeric pipe loading methods are disclosed. A polymeric pipe loader may include a support frame, a positioning platform coupled to the support frame, and a vacuum lift mechanism coupled to the support frame, the positioning platform, or both. A polymeric pipe loading method may include extruding a length of polymeric pipe, cutting the length of polymeric pipe, receiving the length of polymeric pipe on a conveyor chain of a positioning platform, engaging the length of polymeric pipe with a vacuum lift mechanism, and transferring the length of polymeric pipe to a bundling cart.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: November 17, 2015
    Assignee: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventor: Andrew G. Womack
  • Patent number: 9180935
    Abstract: A hawser system between a tension leg platform (TLP) and another vessel employs two lines, oriented in a V-shape, to restrict the vertical motion of a hawser near the bow of the other vessel which may be a semi-submersible tender assisted drilling vessel (TAD). Drilling operations may be performed from the TLP while the semi-submersible provides the supporting services for the drilling operation, e.g. drilling fluid and drill pipe storage. The restricted vertical motion of the hawsers significantly reduces the possibility of the hawsers contacting each other. A hawser system according to the invention couples the semi-submersible TAD vessel to the TLP and may be implemented without passing the hawsers through sheaves.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: November 10, 2015
    Assignee: Seahorse Equipment Corp
    Inventors: Oriol R. Rijken, Robert M. Kipp
  • Patent number: 9139260
    Abstract: A floating construction having a base, a tensioning member extending from the sea bed in the direction of the base, a connector at an upper end of the tensioning member and attachment elements on the base for attaching to the connector, characterized in that, the attachment elements include a guide member for lowering a tensioning member section by a predetermined distance, which tensioning member section at a free end is provided with a complementary connector for attaching to the connector on the upper end of the tensioning member, the tensioning member section including at an upper end a stopper for engaging with the base and for fixing and/or adjusting the upper end in a vertical direction, the floating construction including a pulling device attached to the tensioning member section, for lowering the tensioning member section along the guide member towards the tensioning member.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: September 22, 2015
    Assignee: Single Buoy Moorings, Inc.
    Inventor: Jack Pollack
  • Patent number: 9068550
    Abstract: An assembly for generating energy from sea currents comprises a main floating body to be oriented across the direction of the sea current, a rotor assembly depending from the main floating body, at least one stabilising member extending substantially sideways from the main floating body and mooring lines for anchoring the assembly. Each stabilizing member is attached to the main floating body at a position substantially corresponding with the position of attachment of a mooring line. Further an assembly for generating energy from sea currents comprises a main floating body to be oriented in parallel to the direction of the sea current, at least two outriggers extending substantially sideways in opposite directions from the main floating body, a rotor assembly depending from the outrigger means and mooring lines for anchoring the assembly. The mooring lines are attached to the main floating body at or near the opposite frontal ends thereof.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: June 30, 2015
    Assignee: Bluewater Energy Services B.V.
    Inventors: Willem Sievert Ganzinga, Robert Kamp, Anne Lourens Sijtstra
  • Publication number: 20150129234
    Abstract: An offshore drilling unit includes a main body configured to be bottom supported in shallow water. Also included is an anchoring assembly secured to a sea floor. Further included is a tensioning system operatively coupled to the main body and the anchoring assembly, wherein the tensioning system is configured to apply a downward force on the main body to resist ice loads imposed on the offshore drilling unit.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: Peter NOBLE, Randall S. SHAFER
  • Patent number: 9022693
    Abstract: A floating production system includes a jacket and a deck supported by the jacket. The jacket includes a plurality of legs and a plurality of braces connected between the plurality of legs. The plurality of braces are connected between the legs along substantially the entire length of each leg to provide a stiffened space frame. Two or more of the plurality of legs may further include a longitudinally oriented launch cradle.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: May 5, 2015
    Assignee: The Williams Companies, Inc.
    Inventor: Stafford J. Menard
  • Patent number: 8967912
    Abstract: A method of installing a production buoy at a subsea anchoring location is disclosed. The method includes floating a production buoy over a subsea anchoring location. Then, hanging at least a tether off the production buoy such that the or each tether extends from the production buoy towards the subsea anchoring location occurs. The method includes submerging the production buoy to a depth which allows connection of the or each tether to the subsea anchoring location. An apparatus suitable for use with this method is also provided.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 3, 2015
    Assignee: Subsea 7 Limited
    Inventors: Julek Romuald Tomas, Arnbjorn Joensen
  • Publication number: 20150037103
    Abstract: Tendon systems described herein may include a cellular tendon main body system having at least two essentially parallel pipe strings and may be used to moor a floating structure to a seabed. Hybrid tendon systems may include one or more tendon modules, where at least one tendon module includes a cellular tendon main body system. Where more than one module is used, the modules may be different types or designs of tendon systems, such as conventional single-string tendon or cellular tendon, according to the performance requirements of the module. Cellular tendon main body systems described herein enable the overall tendon, and subsequently the floating structure, to be used in ultra-deep waters and/or with heavy topsides.
    Type: Application
    Filed: December 12, 2013
    Publication date: February 5, 2015
    Applicant: WORLEYPARSONS GROUP, INC.
    Inventors: Zhuoming Jim Yu, Chunfa Wu
  • Publication number: 20150016892
    Abstract: A TLP design with improved motion characteristics and that is drawn to a means of reducing the required tendon stiffness and thereby reducing the overall cost of deepwater TLPs. The invention reduces the hydrodynamic added mass of the TLP hull. The horizontal pontoons that connect the vertical columns of the TLP are shaped to reduce the hydrodynamic added mass of the structure in the vertical direction.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventors: Edmund Otto Muehlner, Guibog Choi, Surya Prakash Banumurthy
  • Patent number: 8807874
    Abstract: A deep draft semi-submersible production and drilling platform unit with dry trees is described. The platform unit preferably comprises four columns, a ring pontoon, a two-axis symmetrical hull with draft in the range of 100 to 155 feet, top-tensioned risers with push or pull tensioners of preferred combined vertical stiffness of 10% to 30% of the platform water plane stiffness, a wellbay with a well spacing in the range of 12 to 18 feet, a riser guiding system supported by the pontoons or at an elevated level, topside facilities supported by a box type of deck structure, mooring lines, and catenary risers.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: August 19, 2014
    Assignee: Aker Solutions Inc.
    Inventors: Yijian Zeng, Leiv Gunnar Wanvik, Tao Wang, Stein Rasmussen, Renjian Lu
  • Publication number: 20140205383
    Abstract: The invention relates generally to a method for supporting non-buoyant offshore drilling units that are anchored to the sea floor and are subject to heavy lateral loads. Specifically, tension tendons are attached to piled foundations to prevent jack-ups from being overturned by the loads. Tension can also be applied to the tendons to provide additional hold down forces to the offshore units.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 24, 2014
    Applicant: CONOCOPHILLIPS COMPANY
    Inventors: Peter NOBLE, Randall Scott SHAFER
  • Patent number: 8764346
    Abstract: A tension-based tension leg platform (TBTLP) for use in ultra deepwater applications to support dry-tree oil and gas production utilizes a tension base or artificial seabed that simplifies tendon design at deepwater locations in harsh environment and has a truss pontoon structure that reduces vertical and horizontal wave loadings. The platform may include a riser support tower that makes production risers feasible in 8,000 ft water depths without riser pretension to the hull and reduces or eliminates vortex induced vibration problems.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: July 1, 2014
    Inventor: Nagan Srinivasan
  • Patent number: 8690483
    Abstract: A tendon is assembled in a horizontal orientation using connectors or by welding at a weld station on a barge or other vessel located at or near the installation site of a tension leg platform. During assembly, the tendon is pulled away from the assembly vessel and tensioned by a tug or offshore work vessel. When fully assembled, the tendon may be up-ended in a manner similar to a wet-towed tendon, and then either pre-installed using floats or passed over to a TLP which is on-site and ready to receive tendons.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: April 8, 2014
    Assignee: Seahorse Equipment Corp
    Inventor: Steven John Leverette
  • Patent number: 8683935
    Abstract: A mooring leg connector for use with a mooring leg extending up from the sea floor to connect a floating structure to be moored to the seabed wherein disconnection and connection of the mooring leg is done by pulling in and out a connector elongated body extending in the mooring leg direction. The connector has a latch mechanism for fixation of the mooring leg to the floating structure to be moored and preventing movement in the direction of the seabed, and a flexible part with a double articulation axis located at the bottom of the connector body above the attachment member, the connector body being received in a housing which is fixed to a part of the structure to be moored, wherein the latch mechanism includes guiding elements and followers or orientation pins between the body of the connector and the housing.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 1, 2014
    Assignee: Single Buoy Moorings, Inc.
    Inventors: Christian Raymond Bauduin, Jean Braud, Jean Pierre Benoit
  • Patent number: 8662793
    Abstract: A floating wind farm includes a plurality of floating rafts connected with one another and being disposed in a body of water below the water by a predetermined distance; a plurality of wind turbines connected to the floating rafts respectively and being configured to be driven by wind and thereby generate power; a power generator connected to the floating rafts; a plurality of anchors connected to the floating rafts respectively and disposed in the body of water for confining the location of the floating rafts. Each of the floating rafts includes at least three pipes and a plurality of ballast blocks attached to the pipes. The pipes are configured to store air compressed by the power generated by the wind turbines. The power generator is configured to generate and output electricity from the compressed air stored in the pipes.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 4, 2014
    Inventors: Carlos Wong, Livia Wong
  • Patent number: 8657534
    Abstract: The floating platform (2) according to the invention is provided with anchors (9-11) which are arranged vertically below connecting locations (20, 21, 22) on a floating support structure (7). Mooring cables (26, 27, 28) extend from each anchor (9-11) vertically upward to corresponding connecting locations while other mooring cables (29) to (34) extend at an angle upward to connecting locations arranged beyond the center (19). As a result, a stable floating platform with high load-carrying capacity is obtained.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: February 25, 2014
    Assignee: Gicon Windpower IP GmbH
    Inventor: Jens Jähnig
  • Publication number: 20140044492
    Abstract: A tendon is assembled in a horizontal orientation using connectors or by welding at a weld station on a barge or other vessel located at or near the installation site of a tension leg platform. During assembly, the tendon is pulled away from the assembly vessel and tensioned by a tug or offshore work vessel. When fully assembled, the tendon may be up-ended in a manner similar to a wet-towed tendon, and then either pre-installed using floats or passed over to a TLP which is on-site and ready to receive tendons.
    Type: Application
    Filed: October 18, 2013
    Publication date: February 13, 2014
    Applicant: Seahorse Equipment Corp
    Inventor: Steven John Leverette
  • Patent number: 8628274
    Abstract: Floating construction (1) having a base (2), a tensioning member (17, 18) extending from the sea bed in the direction of the base, a connector (27, 28) at an upper end (16,19) of the tensioning member and attachment means on the base for attaching to the connector, characterized in that, the attachment means comprise a guide member (14, 15) for lowering a tensioning member (12, 13) section by a predetermined distance (D2), which tensioning member section at a free end (23, 24) is provided with a complementary connector (25, 26) for attaching to the connector on the upper end of the tensioning member, the tensioning member section comprising at an upper end a stopper (31, 32) for engaging with the base and for fixing and/or adjusting the upper end in a vertical direction, the floating construction comprising a pulling device (36, 37, 38, 39) attached to the tensioning member section, for lowering the tensioning member section along the guide member towards the tensioning member.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: January 14, 2014
    Assignee: Single Buoy Moorings Inc.
    Inventor: Jack Pollack
  • Patent number: 8608408
    Abstract: A tension leg platform for use in offshore hydrocarbon production and drilling operations, wherein the tension leg platform can include a plurality of column pairs. Each column pair can include a primary column connected with a secondary column and a secondary pontoon between the primary column and secondary column. The primary columns can be configured to support a deck, and the secondary columns can be connected with the primary column below the draft of the tension leg platform. The tension leg platform can also include a plurality of primary pontoons for connecting the primary columns to one another.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: December 17, 2013
    Assignee: Houston Offshore Engineering, LLC
    Inventors: Jun Zou, Philip Poll, John Chianis
  • Patent number: 8585326
    Abstract: A tendon is assembled in a horizontal orientation using connectors or by welding at a weld station on a barge or other vessel located at or near the installation site of a tension leg platform. During assembly, the tendon is pulled away from the assembly vessel and tensioned by a tug or offshore work vessel. When fully assembled, the tendon may be up-ended in a manner similar to a wet-towed tendon, and then either pre-installed using floats or passed over to a TLP which is on-site and ready to receive tendons.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: November 19, 2013
    Assignee: Seahorse Equipment Corp.
    Inventor: Steven John Leverette
  • Patent number: 8573891
    Abstract: An offshore structure comprises a base configured to be secured to the sea floor. In addition, the offshore structure comprises an elongate stem having a longitudinal axis, a first end distal the base and a second end pivotally coupled to the base. Further, the offshore structure comprises an upper module coupled to the first end of the stem. The upper module includes a variable ballast chamber. Still further, the offshore structure comprises a first ballast control conduit in fluid communication with the variable ballast chamber of the upper module. The first ballast control conduit is configured to supply a gas to the variable ballast chamber of the upper module and vent the gas from the variable ballast chamber of the upper module. Moreover, the offshore structure comprises a deck mounted to the upper module.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: November 5, 2013
    Assignee: Horton Wison Deepwater, Inc.
    Inventors: Edward E. Horton, III, James McCelvey
  • Publication number: 20130287502
    Abstract: A floating, offshore drilling and/or production platform such as a tension leg platform, semi-submersible, spar or the like is equipped with a ballast tank system that comprises the traditional tank and a shaft that runs typically vertically from top-of-hull level to the top of the tank. This shaft is large enough to allow the ballast pipe, sounding lines, instrumentation piping, etc. to be installed within it. In certain embodiments, the shaft itself functions as a vent line.
    Type: Application
    Filed: April 30, 2013
    Publication date: October 31, 2013
    Applicant: Seahorse Equipment Corp
    Inventors: Oriol R. Rijken, Edward Sean Large, Sjoerd Hoekstra
  • Publication number: 20130230358
    Abstract: 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.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 5, 2013
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: David Cain, William F. Puccio, Shian J. Chou
  • Patent number: 8430602
    Abstract: The disclosure provides a tension leg platform (“TLP”) with a plurality of buoyant pontoons suitable for highly disturbed seas that can expand the stability of the tension leg platform by extending at least one buoyant pontoon beyond an intersection of two pontoons. In at least one embodiment, the location of the column can be decoupled from the customary end of the pontoon. The tendons can be located at the ends of the pontoons extending beyond the intersection. In some embodiments, such as four-column TLPs, the pontoons can be extended orthogonally relative to an adjacent pontoon. The extending pontoon increases a buoyancy of the pontoon, increases a pitch stability of the TLP, and increases quayside stability. The extended pontoon can be structurally intersected with the adjacent pontoon to strengthen the extended pontoon and reduce the failure mode of such structure.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: April 30, 2013
    Assignee: TECHNIP France
    Inventors: Qi Xu, Michael Y. H. Luo, Steven Barras, James O'Sullivan
  • Patent number: 8398339
    Abstract: A self-tensioning tendon for pulling a tension leg platform (TLP) down to a desired draft position. The self-tensioning tendon can be utilized with either a co-installation process or a pre-installation process and connects to an assembled tendon joint. The self-tensioning tendon comprises a hydraulically controlled Length Adjustment Joint (LAJ) that further comprises an integral cylinder with external threads and a piston rod. The self-tensioning apparatus has features that advantageously reduce the time required to ballast the hull of the TLP. A hydraulic source actuates the integral cylinder to pull the TLP down to the target draft position, significantly reducing the time needed to ballast the hull of the TLP with millions of gallons of water. A Top Tendon Connector (TTC) ratchets down along the cylinder to lock the TLP at the final draft position.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: March 19, 2013
    Assignee: Vetco Gray Inc.
    Inventor: Jesse B. Riha
  • Publication number: 20130000540
    Abstract: A hull, suitable for use as a tension leg platform (TLP) or as a semi-submersible vessel, comprises columns having a generally polygonal transverse cross section at least one axis of which is generally radially aligned with the central vertical axis of the hull. Buoyant, subsurface pontoons interconnect adjacent columns. The pontoons are generally rectangular in cross section and the outboard, generally vertical surface of each pontoon is connected to a side surface of an adjoining column at a location which is substantially inboard of the outermost face of the column. In certain embodiments of the invention, tendon porches (configured to receive the upper tendon connectors of a TLP) are mounted to the outboard surface of one or more pontoons.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 3, 2013
    Applicant: SEAHORSE EQUIPMENT CORP
    Inventors: Oriol R. Rijken, Xiaoqiang Bian, Edward Sean Large, Steven John Leverette
  • Patent number: 8196539
    Abstract: An offshore platform includes a buoyant hull comprising three or more interconnected pontoons and a plurality of support columns. The support columns support a deck or structure that supports equipment and/or payloads above a water surface. The support columns extend upwardly from respective ends of the pontoons to the deck or structure supported above the water surface. Anchoring members anchor the platform to the seabed.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: June 12, 2012
    Assignee: Seahorse Equipment Corporation
    Inventors: Steven J. Leverette, Oriol R. Rijken, Peter A. Lunde, Stephen E. Kibbee, John O. Telders
  • Patent number: 8182176
    Abstract: A pipe comprising a flexible membrane that is disposed over a plurality of spaced-apart tendons is disclosed.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: May 22, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Stephen L. Bailey, Alan K. Miller
  • Publication number: 20120099930
    Abstract: Riser management systems, apparatus, and methods to maintain a selected range of tension on a plurality of risers extending between subsea well equipment and a floating vessel, are provided. A riser management system can include a mono-buoyancy can platform operably coupled to a plurality of risers extending between subsea well equipment and a moored floating vessel, and a plurality of tensioner units each connected to a top portion of a separate one of the risers to provide tension to each of the risers. The mono-buoyancy can platform can provide tension to each of the risers sufficient to compensate for a relative vertical offset between the risers and the vessel due to vessel movement, which generally affects each of the risers equally, within tolerances, while the tensioner units can simultaneously provide tension to compensate for one or more additional factors which can affect each riser differently.
    Type: Application
    Filed: October 21, 2010
    Publication date: April 26, 2012
    Applicant: VETCO GRAY INC.
    Inventors: Joe Pallini, Steve Wong, Fife B. Ellis
  • Patent number: 8087849
    Abstract: A tension leg platform includes a deck supported on the upper ends of three or more columns interconnected at the lower ends thereof by horizontally disposed connecting members. The columns are battered inwardly and upwardly from the platform base to the deck. Tendons connected at the columns anchor the platform to the seabed. The footprints of the base of the battered columns and the tendons are larger than the footprint of the deck supported on the upper ends of the columns.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: January 3, 2012
    Assignee: Seahorse Equipment Corporation
    Inventors: Steven J. Leverette, Oriol R. Rijken, Peter A. Lunde, Stephen E. Kibbee
  • Publication number: 20110262230
    Abstract: A tendon is assembled in a horizontal orientation using connectors or by welding at a weld station on a barge or other vessel located at or near the installation site of a tension leg platform. During assembly, the tendon is pulled away from the assembly vessel and tensioned by a tug or offshore work vessel. When fully assembled, the tendon may be up-ended in a manner similar to a wet-towed tendon, and then either pre-installed using floats or passed over to a TLP which is on-site and ready to receive tendons.
    Type: Application
    Filed: April 27, 2011
    Publication date: October 27, 2011
    Applicant: SEAHORSE EQUIPMENT CORP.
    Inventor: Steven John Leverette
  • Patent number: 8021081
    Abstract: 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.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: September 20, 2011
    Assignee: Technip France
    Inventors: Gerald Crotwell, Alan Yu
  • Publication number: 20110206466
    Abstract: A tension leg platform that is stable with a quayside-integrated deck without the use of temporary stability modules or specialized installation techniques. The hull preferably consists of four radially-oriented vertical corner columns connected with four central ring pontoon segments. The vertical columns are fixed to the outer periphery of the central pontoon. The columns are characterized by a major radial axis and a minor transverse axis. The mooring system includes tendons supported at tendon porches directly at the four column outboard lower corners, without additional radially-extending tendon support structures.
    Type: Application
    Filed: February 25, 2010
    Publication date: August 25, 2011
    Inventors: William S. Rawles, II, Andrew C. Kyriakides, Sheng-Chyi Li, Qi Ling, Gang Miao
  • Patent number: 7980787
    Abstract: A method for tensioning for oil and natural gas floating platforms and floating vessels using a plurality of self contained dual pressure cylinders for adjusting simultaneously low and high pressures in low pressure and high pressure channels. The method can be used on a floating structure to dampen the effects of sea waves and wind load between casing from a well and the floating structure.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: July 19, 2011
    Assignee: ATP Oil & Gas Corporation
    Inventors: David Trent, Robert Magee Shivers, III, Charles C. Trent
  • Patent number: 7980786
    Abstract: A tensioner system is described for oil and natural gas floating platforms and floating vessels having a plurality of self contained dual pressure cylinders for adjusting simultaneously low and high pressures in low pressure and high pressure channels, wherein the tensioner system is disposed on a floating structure to dampen the effects of sea waves and wind load between casing from a well and the floating structure due to movement of the sea and movement based on wind.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: July 19, 2011
    Assignee: ATP Oil & Gas Corporation
    Inventors: David Trent, Robert Magee Shivers, III, Charles C. Trent
  • Patent number: 7976247
    Abstract: A self contained dual pressure cylinder for use in tensioner assemblies for oil and natural gas floating vessels. The self contained dual pressure cylinder can have a high pressure outer barrel surrounding a high pressure inner barrel, forming a high pressure gas channel, a low pressure outer barrel surrounding a low pressure inner barrel, forming a low pressure fluid channel. A high pressure gas port connected to a high pressure gas reservoir, a low pressure fluid port connected to a low pressure gas reservoir, a low pressure fluid compression area connected to the low pressure fluid port, a hollow rod slidingly engaged each inner barrel, a dual pressure capture plate with moveable rod seals and moveable rod wear, a piston a low pressure elastomeric seal, a low pressure/high pressure separator, and a high pressure elastomeric seal.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: July 12, 2011
    Assignee: ATP Oil & Gas Corporation
    Inventors: David Trent, Robert Magee Shivers, III, Charles C. Trent
  • Patent number: 7976245
    Abstract: A mooring (10) for connecting an ocean energy capturing device (51) to a seabed (16) is disclosed. The mooring (10) comprises a base (12) adapted for connection to the ocean energy capturing device (51). A plurality of anchor bolts (18) are each connected at a first end to the base (12) and have a second end adapted to be embedded in the seabed (16) for attaching the base (12) to the seabed (16). A method of securing the ocean energy capturing device (51) to the seabed (16) is also disclosed. The method involves passing a tensile transmission line (46) through a guide opening (44) in the base (12) and drawing the tensile transmission line (46) through the guide opening (44) to drag the ocean energy capturing device (51) toward the base (51).
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: July 12, 2011
    Assignee: Sykei Pty. Ltd.
    Inventor: Timothy Donegal Finnigan
  • Publication number: 20110164927
    Abstract: The disclosure provides a tension leg platform (“TLP”) with a plurality of buoyant pontoons suitable for highly disturbed seas that can expand the stability of the tension leg platform by extending at least one buoyant pontoon beyond an intersection of two pontoons. In at least one embodiment, the location of the column can be decoupled from the customary end of the pontoon. The tendons can be located at the ends of the pontoons extending beyond the intersection. In some embodiments, such as four-column TLPs, the pontoons can be extended orthogonally relative to an adjacent pontoon. The extending pontoon increases a buoyancy of the pontoon, increases a pitch stability of the TLP, and increases quayside stability. The extended pontoon can be structurally intersected with the adjacent pontoon to strengthen the extended pontoon and reduce the failure mode of such structure.
    Type: Application
    Filed: January 6, 2010
    Publication date: July 7, 2011
    Applicant: TECHNIP FRANCE
    Inventors: Qi XU, Michael Y.H. LUO, Steven BARRAS, James O'SULLIVAN
  • Publication number: 20110100639
    Abstract: A floating structure includes a riser support system. The riser support system includes multiple carts, each suitable for moveably connecting a risers to the riser support system. A cart includes a support frame and one or more riser tensioners for connecting the support frame to a riser. Each cart is designed for being supported by a cart support structure in a production dock and in a drilling dock, and for being transferred by a crane between the production dock and the drilling dock. Thus, the riser support system enables transferring risers and their riser tensioners within the moonpool from a production dock to a drilling dock without the need of disconnecting and/or reconnecting the risers to extra riser tensioners for support in the drilling dock or during transport.
    Type: Application
    Filed: April 28, 2009
    Publication date: May 5, 2011
    Applicant: ITREC B.V.
    Inventors: Joop Roodenburg, Pieter Dirk Melis Van Duivendijk
  • Patent number: 7914234
    Abstract: A tendon top connector for a moored, floating structure such as a tension leg platform, a tension leg buoy or the like has a bowl-shaped extension on the member which transfers the tension of the tendon to the flex connector. A dome-shaped structure at least partially surrounds the bowl-shaped extension but is spaced apart from it to permit at least some rotational movement of the connector. The dome-shaped structure may be attached by clamps or other mounting means to a flange member affixed to the tendon porch. This arrangement provides a load path when the tendon top connector is reverse loaded that extends from the tendon length adjustment joint, through slips, through the bowl-shaped extension, through the dome-shaped structure, through the segmented clamps, and finally into a flange attached to the tendon porch. In this way, detachment of the tendon top connector is prevented if a reverse load is applied such as may occur during extreme metocean conditions.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: March 29, 2011
    Assignee: Seahorse Equipment Corporation
    Inventors: Edward Sean Large, Christopher Paul Hutchinson
  • Publication number: 20110052327
    Abstract: Floating construction (1) having a base (2), a tensioning member (17, 18) extending from the sea bed in the direction of the base, a connector (27, 28) at an upper end (16,19) of the tensioning member and attachment means on the base for attaching to the connector, characterized in that, the attachment means comprise a guide member (14, 15) for lowering a tensioning member (12, 13) section by a predetermined distance (D2), which tensioning member section at a free end (23, 24) is provided with a complementary connector (25, 26) for attaching to the connector on the upper end of the tensioning member, the tensioning member section comprising at an upper end a stopper (31, 32) for engaging with the base and for fixing and/or adjusting the upper end in a vertical direction, the floating construction comprising a pulling device (36, 37, 38, 39) attached to the tensioning member section, for lowering the tensioning member section along the guide member towards the tensioning member.
    Type: Application
    Filed: August 18, 2008
    Publication date: March 3, 2011
    Applicant: SINGLE BUOY MOORINGS INC.
    Inventor: Jack Pollackj
  • Patent number: 7854570
    Abstract: A pontoonless tension leg platform (TLP) has a plurality of buoyant columns connected by an above-water deck support structure. The design eliminates the need for subsea pontoons extending between the surface-piercing columns. In certain embodiments, the buoyancy of the columns is increased by the addition of subsea sections of increased diameter (and/or cross-sectional area) to provide the buoyancy furnished by the pontoons of the TLPs of the prior art. A pontoonless TLP has a smaller subsea projected area in both the horizontal and vertical planes than a conventional multi-column TLP of equivalent load-bearing capacity having pontoons between the columns. This reduction in surface area produces a corresponding reduction in the platform's response to ocean currents and wave action and consequently allows the use of smaller and/or less costly mooring systems.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: December 21, 2010
    Assignee: Seahorse Equipment Corporation
    Inventor: Amir Homayoun Heidari
  • Publication number: 20100290838
    Abstract: A Fractal Column Offset Tension Leg Platform (COTLP) consists of a semi-submersible hull type, tension moored to the seabed. The Fractal COTLP advances the state of technology by utilizing fractal arrangements of repeated, similar structural units, consisting of continuous pontoons and intermittent columns, to provide better construction, operation, stability, payload and service life advantages over existing Tension Leg Platform (TLP) types. Varying, fractal-like geometric arrangements also provide for sizing and configuration advantages and the capability to work in greater water depths than existing TLP technology. Furthermore, fractal arrangements and inter-column spacing can also be optimized to minimize platform hydrodynamic response to waves, thereby reducing mooring and hydrodynamic loads and consequently achieving an optimal and safer platform structure with a longer fatigue life.
    Type: Application
    Filed: May 18, 2009
    Publication date: November 18, 2010
    Inventors: Steffen Allan Shelley, Yura Iginiamre
  • Publication number: 20100254767
    Abstract: A riser tensioner configured to apply a tension to a riser. The riser tensioner includes a frame configured to be fixedly attached to the riser; plural cylinder assemblies spaced around the riser, each cylinder assembly having a cylinder and a piston configured to slidably move inside the cylinder, the piston being configured to connect to the frame; a guide roller support stationarily mounted to and extending from the frame; at least one bearing fixedly attached to the guide roller support; and a guide member configured to be in rolling engagement with the at least one bearing as the cylinder moves relative to the frame.
    Type: Application
    Filed: June 14, 2010
    Publication date: October 7, 2010
    Applicant: VETCO GRAY INC.
    Inventors: Joseph W. Pallini, Edward A. Mendoza
  • Publication number: 20100232886
    Abstract: A self-tensioning tendon for pulling a tension leg platform (TLP) down to a desired draft position. The self-tensioning tendon can be utilized with either a co-installation process or a pre-installation process and connects to an assembled tendon joint. The self-tensioning tendon comprises a hydraulically controlled Length Adjustment Joint (LAJ) that further comprises an integral cylinder with external threads and a piston rod. The self-tensioning apparatus has features that advantageously reduce the time required to ballast the hull of the TLP. A hydraulic source actuates the integral cylinder to pull the TLP down to the target draft position, significantly reducing the time needed to ballast the hull of the TLP with millions of gallons of water. A Top Tendon Connector (TTC) ratchets down along the cylinder to lock the TLP at the final draft position.
    Type: Application
    Filed: September 1, 2009
    Publication date: September 16, 2010
    Applicant: Vetco Gray Inc.
    Inventor: Jesse B. Riha
  • Patent number: 7766581
    Abstract: A tendon or riser connector has a separate lock-down device that overrides the connector's ability to unlock if the riser or tendon goes slack. The connector has a lock ring that engages a groove profile on a receptacle and is prevented from accidentally unlocking with a cam ring and set of blocks. The blocks are movably positioned between engaged and disengaged positions that correspond to the locked and unlocked positions of the lock ring.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: August 3, 2010
    Assignee: Vetco Gray Inc.
    Inventors: Brian N. Munk, Ed Mendoza
  • Publication number: 20100129160
    Abstract: A pipe comprising a flexible membrane that is disposed over a plurality of spaced-apart tendons is disclosed.
    Type: Application
    Filed: November 20, 2009
    Publication date: May 27, 2010
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Stephen L. Bailey, Alan K. Miller
  • Patent number: 7708498
    Abstract: 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.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: May 4, 2010
    Assignee: Vetco Gray Inc.
    Inventors: Fife Baker Ellis, Kevin Edward O'Dell