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| Number | Title | Issue Date |
| 4521135 | Pressurized gas filled tendons Pressurized gas filled tubular tendons provide a means for detecting leaks therein. Filling the tendon with a gaseous fluid provides increased buoyancy and reduces the weight supported by the buoyant structure. The use of a corrosion inhibiting gaseous fl... | 06/04/1985 |
| 4498814 | Releasable anchor connector for tension leg platform A releasable anchor connector for a tension leg platform in which a tether with a bore is locked in a template insert at the seabed by means of a series of locking fingers acting through a ring and a resilient connector. The tether is unlocked by locating... | 02/12/1985 |
| 4491439 | Tendon latch A latch connects tendons run from a floating platform to a socket in a foundation on the sea floor. The latch includes a latch body having a plurality of dogs disposed within and urgible outward from the latch body. A piston is releasably disposed within ... | 01/01/1985 |
| 4470724 | Tying system for offshore terminal A tying arrangement is described for use with an offshore terminal wherein a transfer structure near the sea surface is anchored by a group of anchor lines extending at downward inclines to the sea floor. A bumper line extends between a pair of anchor lin... | 09/11/1984 |
| 4470721 | Crane assembly for floatable oil/gas production platforms A floatable oil/gas production platform assembly has a deck, disposed beneath the deck a zone including a plurality of adjacent stations for support of oil/gas flowlines/risers originating from beneath the platform, and a crane disposed in a space above t... | 09/11/1984 |
| 4437794 | Pyramidal offshore structure Tethered or bottom-ballasted offshore platforms preferably have a pyramidal configuration. Struts connect the apexes of a polyhedron configuration to form a triangle defining each face. The pyramidal configuration can be ballasted to the bottom in relativ... | 03/20/1984 |
| 4432670 | Combination connector and flex joint for underwater tension elements Combination tension connector and flex joint for underwater tension elements, such as the tension elements of a leg of a tension leg platform. The flex joint is of generally ball and socket type, with the ball member connected to the lower end of the tens... | 02/21/1984 |
| 4422806 | Sliding tension leg tower A compliant offshore drilling and producing structure is disclosed. Axial piles extend from the sea floor above the water's surface and are enveloped by sleeves extending downwardly from a rigid platform. Buoyant chambers attached to the sleeves provide a... | 12/27/1983 |
| 4421436 | Tension leg platform system A tension leg platform system for use in drilling wellbores into the floor of an offshore body of water. Included in the system is a buoyancy control vessel having a plurality of pull down cables attached thereto which extend to the ocean floor. A plurali... | 12/20/1983 |
| 4395160 | Tensioning system for marine risers and guidelines A double rack and pinion device (17) is used to maintain substantially constant upward tension on a marine riser (16) that extends from stationary equipment (11) on the ocean floor to a floating structure (10) on the ocean surface. A preferred embodiment ... | 07/26/1983 |
| 4386874 | Method for installation of a mooring cable A method of mooring a vessel to an anchoring structure connected into the floor of a body of water wherein a drum containing a coiled mooring cable is lowered down to the anchoring structure, a first end of the coiled mooring cable is attached to the anch... | 06/07/1983 |
| 4374630 | Anchor connector for tension leg An anchor connector with a latch segment retainer body (28) having a lost motion connection to the connector body (36) which has a downwardly-extending skirt (38). Latch segments (30) pivotally connected to the retainer body are free to swing outwardly wh... | 02/22/1983 |
| 4367982 | Safety device for anchored marine structure A fail-safe guy line system for marine structures. In the event of cable failure near the water surface, a braking device, such as a cable clamp, can be wedged into a sheave or fairlead to prevent loss of the guy line.... | 01/11/1983 |
| 4364323 | Vertical stressed mooring tether in a floating oil platform A floating platform intended to be anchored to the sea bed incorporates a substantially vertical tether. The tether is fitted with a gas-operated tension spring device capable of generating an elastic tensile force in the tether. Means is provided for var... | 12/21/1982 |
| 4358219 | Method for confining an uncontrolled flow of hydrocarbon liquids Method for confining and collecting a flow of hydrocarbon fluids which are uncontrollably issuing from a source thereof at the floor of a body of water. A tension leg type floating vessel is positioned above the source of hydrocarbon fluid. An enclosure m... | 11/09/1982 |
| 4320993 | Tension leg platform mooring tether connector A connector apparatus for connecting a tension leg platform mooring tether to a subsea foundation, the apparatus comprising: a plug positioned on the lower end of the mooring tether for mating union with a receptacle positioned in the foundation so that t... | 03/23/1982 |
| 4285615 | Corrosion resistant tension leg cables A tension leg cable is connected between a floating structure and a seafloor anchor means. The cable is a multi-strand cable having voids between adjacent strands. A fluid tight vulcanized rubber sheath is provided covering an outer surface of the cable. ... | 08/25/1981 |
| 4281613 | Method of and apparatus for mooring a floating structure A tension mooring system for a floating structure such as a drilling or production platform having a plurality of permanent mooring lines extending upwardly from a plurality of bottom anchors and terminating below the water level and having buoys connecte... | 08/04/1981 |
| 4198179 | Production riser A riser for production of oil and gas in a marine location with the riser connected to the casing supported at the mud line of a body of water and extending upward in the water to a tension moored floating structure. The riser includes a flexible joint ne... | 04/15/1980 |
| 4185694 | Marine riser system A marine riser system is provided which extends between a floating offshore platform and well means in a seabed formation and which has riser end portions connected in novel manner to the floating platform and to wellhead structure at the well hole. Each ... | 01/29/1980 |
| 4174628 | Marine riser measuring joint A marine pipe riser, through which wells may be drilled during offshore drilling operations, is provided with an instrumented section equipped with stress-measuring elements so that loads and stress on the pipe riser may be measured.... | 11/20/1979 |
| 4114393 | Lateral support members for a tension leg platform Apparatus and method for mooring a tension leg platform at an offshore location wherein the tensioned cables of the platform legs are laterally supported by a plurality of rigid, fixed-dimensioned support members which interconnect the legs and are vertic... | 09/19/1978 |
| 4062313 | Installation of vertically moored platforms This invention relates to the installation of a Vertically Moored Platform over a selected well site. The platform or structure is supported on a buoyant gravity base and floated to a position over the subsea well site. The gravity base is then ballasted ... | 12/13/1977 |
| 4048945 | Removable anchor having retrievable ballast Method and apparatus which provides a retrievable anchor for a floating vessel. The apparatus includes a ballast chain secured to a winch located on the vessel. The chain is lowered into a submergible anchor shell which together with the chain forms the a... | 09/20/1977 |
| 4040262 | Ice anchor An anchor frozen into an ice sheet is used primarily for propelling arctic vehicles by providing a stationary structure toward which the vehicle can be winched. The anchor includes a band of high tensile strength material formed in a closed, curved config... | 08/09/1977 |
| 3986471 | Semi-submersible vessels An apparatus for damping vertical movement of a semi-submersible vessel having a small waterplane area, whose buoyancy is provided substantially completely by submerged pontoon means and which includes at least one submerged damper plate having valves or ... | 10/19/1976 |
| 3983706 | Marine structure with hydraulic tensioner A tension leg marine structure or working platform is floatably positioned above an offshore working site, being maintained in place by a plurality of tension cables that connect to anchors at the sea floor. A riser which extends between the structure and... | 10/05/1976 |
| 3983828 | Vertically moored platform installation This invention relates to the installation of a vertically moored platform over a selected well site. The platform or structure is supported on a buoyant gravity base and floated to a position over the subsea wall site. The gravity base is attached or hel... | 10/05/1976 |
| 3982401 | Marine structure with detachable anchor Semisubmersible marine structure for operation in offshore waters, comprising a work deck which is supported by a buoyant substructure. The latter includes a separably connected anchor unit which can be controllably lowered to the floor of the offshore si... | 09/28/1976 |
| 3982492 | Floating structure An improved floating structure suitable for use as a floating drilling platform, production platform or other moored floating structure having a vertical tension mooring system with a plurality of anchors, ballasting and deballasting means, and a pluralit... | 09/28/1976 |
| 3976021 | Installation of vertically moored platform This invention relates to the installation of a Vertically Moored Platform and equipment and apparatus used in effecting such installation. The floating structure, anchored only by essentially parallel and vertical elongated members under tension, is posi... | 08/24/1976 |
| 3934528 | Means and methods for anchoring an offshore tension leg platform An apparatus and method for anchoring an offshore tension leg platform which includes a platform supported above an ocean surface by buoyant supports comprising at least three vertical buoyant support members. Each vertical support member includes a centr... | 01/27/1976 |
