Matches 101 - 150 out of 219 < 1 2 3 4 5 >
Match Document Document Title
5290126 Antirotation device for subsea wellheads  
A subsea well assembly has an antirotation device to prevent rotation of an inner wellhead housing within an outer wellhead housing. A number of slots are formed in the upper rim of the outer...
5277521 Semi-submersible production platform  
A semi-submersible production platform (10) intended for oil production, water injection and oil and gas export includes a hull (11) of basic rectilinear shape consisting of floats (17) with...
5273376 Back-up connector release tool  
An emergency release tool for operation by a remotely operated vehicle (ROV) for forcefully releasing a riser from a subsea well assembly The tool includes hydraulic cylinders mounted on a frame...
5269629 Elastomeric swivel support assembly for catenary riser  
A method and apparatus is described for installing an export production riser on an offshore production platform that moves in response to ocean waves, wind and currents. The riser is provided with...
H001246 Buoyant cable tether  
A tether for securing a buoyant structure to the ocean floor. The tether includes a cable or a plurality of cables whose weight is at least partially supported by a buoyancy tank.
5256001 Cylindrical system for in-situ treatment of underwater contaminated material  
System including method and apparatus for treating contaminated underwater sediment by lowering a cylindrical casing to an underbed, lowering a power driven Kelly bar with plural blade injecting...
5244313 Ratcheting segments for TLP connector  
A tension leg platform utilizes a top connector for the tendons that has ratcheting segments. Each segment includes a carrier located above and a lower portion containing grooves for engaging the...
5222839 Method and apparatus for underwater reclamation  
An improved method for underwater reclamation is disclosed. Dredged mud sent under pressure by an earth and sand conveying device is treated with solidifying material, and before it is solidified,...
5207534 Method for conducting offshore well operations  
A method is disclosed for conducting offshore well operations from an auxiliary vessel in support of a compliant platform. The auxiliary offshore drilling vessel is restrained with respect to the...
5190411 Tension leg well jacket  
A tension leg well jacket ("TLWJ") is disclosed which is configured to receive well operations support from an offshore drilling vessel docked thereto and to receive the production riser in...
5174687 Method and apparatus for installing tethers on a tension leg platform  
A method and apparatus for installing and tensioning mooring tethers or tendons between a subsea foundation and a tension leg platform. Load bearing porch members secured on the platform columns...
5150986 Process and apparatus for depositing silt on the bottom and slopes of the wet open working or dredging  
Sand and gravel material conveyed from a floating dredger is fed to a treatment installation where silt is separated. The silt arising in the process may be fed over a floating pipe line and...
5147149 Tension leg dewatering apparatus and method  
An apparatus and method are provided for dewatering an interior of a hollow tension leg connecting a tension leg platform to a floor of a body of water. The apparatus includes a pump having a...
5147148 Heave-restrained platform and drilling system  
A Heave-Restrained Platform and Drilling System (HRP/DS) comprises a floating structure having a central buoyancy means, at least three out-rigger columns, and a hybrid mooring system in which a...
5135327 Sluice method to take TLP to heave-restrained mode  
A tension leg platform which can be a heave restrained platform and drilling system (HRP/DS) is taken to the heave restrained mode by rapidly sluicing ballast by gravitational force from a...
5127765 System for in-situ treatment of underwater contaminated material  
System including method and apparatus for treating contaminated underwater sediment by lowering a hollow casing to an underbed, lowering a power driven Kelly bar with injecting and mixing blade fed...
5114276 Apparatus and method for mooring a floating vessel  
An elongated housing having opposite ends is embedded in the sea floor. One end extends downwardly a substantial distance into the sea floor and the other end terminates adjacent the surface of the...
5024557 Method and apparatus for constructing an offshore hollow column  
A method and apparatus for forming a hollow column of concrete on a floating offshore platform by applying successive layers of concrete and reinforcing to a single surface slipform which outlines...
5020942 Alignment device for a tension leg platform tendon top connector  
A tension leg platform top connector will connect a tendon to the platform. The top connector has a housing with a bore containing a conical shoulder. Several segments locate on the conical...
4995762 Semisubmersible vessel with captured constant tension buoy  
A floating drilling and production unit comprising two independently floating bodies: (1) an outer, larger, substantially cylindrical buoyant caisson with an enlarged skirt around its lower...
4968183 Arrangement for anchoring the legs of a marine tension leg platform in a foundation on the sea floor  
In an anchoring arrangement for releasable anchoring of the legs of a marine tension leg platform in a foundation on the sea floor, the lower ends of the tension legs with an end head (1) are...
4943188 Rotating lug anchor connector  
A rotating lug anchor connector (10) is disclosed for anchoring the tether (12) of tension leg platform (14) to the sea floor. The connector includes an anchor latch assembly (18) which is mounted...
4940362 Packing means for a flexible tension leg in a tension leg platform  
A tension leg platform has a flexible tension leg member comprising upper and lower tension leg elements and a casing within which the upper and lower tension leg elements are flexibly joined. The...
4938630 Method and apparatus to stabilize an offshore platform  
Method and apparatus to stabilize a columnar platform for deepwater offshore applications. An added mass stabilizer system is utilized to control first order heave, pitch, roll, surge and sway...
4938632 Tension leg platform and method for installation of the same  
A tension leg platform for drilling and/or production, processing and transporting hydrycarbons from sub sea wells or installations, and methods for installation of such platform. The platform...
4934870 Production platform using a damper-tensioner  
The floating structure has limited heave oscillations. A long member has a lower end coupled to the seabed. An extensible tensioner is coupled between a platform deck and the upper end of the long...
4923337 Prestressed steel tube, in particular for making anchor lines for taut line type production platforms, a method of handling and installing such a tube, and a platform including such a tube  
According to the invention a steel tube is prestressed longitudinally. This prestress is advantageously exerted by cables (20) extending along the tube (10) either inside the tube or outside the...
4923335 Process and device for the production of a marine engineering structure, such as a pier, jetty and the like  
The invention relates to a process and a floating apparatus (1, 2, 18) for the construction of columnlike elements (16, 17), forming part of a pier, a jetty or the like marine structure, in which a...
4913592 Floating structure using mechanical braking  
The floating structure has a structural frame and a long member which has a lower end anchored to the seabed. The structural frame has limited heave motion relative to the long member. An...
4913238 Floating/tensioned production system with caisson  
A floating/tensioned production system for use in deepwater drilling and production operations generally combining a relatively small tension leg platform with a semisubmersible platform. The...
4909671 Method for installation of a buoyant body on a sea bottom  
A method of installing a floatable or buoyant body on the sea floor includes towing the body to an installation site at the sea surface and subsequently submerging the body towards the sea floor by...
4907914 Tether connector for a tension leg platform  
A releasable latch-type connector for a tension leg platform tether. A tether portion of the latch is provided with an annularly arranged set of shear lugs. The tether portion of the latch is...
4906139 Offshore well test platform system  
An offshore well test platform system is positionable above one or more underwater wells and comprises a submerged buoy restrained below the surface of the water by a plurality of laterally...
4895481 Non-rigid marine platform with surface wellheads  
A platform consisting of a rigid structure supporting the deck, floats fixed to the lower part of the rigid structure, and flexible structure formed of piles fixed by their upper ends to the rigid...
4892444 Resilient unit  
A resilient unit able to accomodate a large movement comprises a stack of elastomeric bearing units arranged to be loaded in series and to deform primarily in shear. Preferably a plurality of the...
4878446 Method for the forming and the deposition in a selected place of a bulk  
A method for the forming and the deposition in a selected place of a bulk consisting substantially of loose or lightly cohesive material, such as sand or other ground material, for example for use...
4859117 Reversible mechanical coupling, particularly for tensional anchorages  
A reversible mechanical coupling to be clamped in a suitable seat by means of clamping levers and wedges, in which the clamping levers are pivoted to arms rigid with said wedges by two lateral...
4808035 Pneumatic riser tensioner  
A system for supporting one end of a riser or other elongate element from a marine structure. In the preferred embodiment, a plurality of gas springs are symmetrically disposed about the upper end...
4793738 Single leg tension leg platform  
A single leg tension leg platform is a semi-submersible structure moored at a deep water site by hybrid mooring consisting of a single tension leg or cluster of tendons attached to a central column...
4787778 Method and apparatus for tensioning a riser  
A tensioner system for a riser of a subsea production well. A plurality of at least three tensioners are each pivotally secured to both a lower surface of the production platform and to a tensioner...
4759662 TLP marine riser tensioner  
Several embodiments of a marine riser tensioner (10, 100, 200, 300) are disclosed for use in tensioning a marine riser (12) on a tension leg platform (14) by the use of elastomeric elements. In one...
4741648 Offshore platform structure having at least a superstructure and a substructure made of reinforced concrete, and slipforming means for slipforming supporting columns of such structure  
Slipforming means intended for slipforming inclined, hollow columns of reinforced concrete, comprising a slipform platform (14) including the form work (28, 29), which is supported by and may be...
4674917 Method and device for placing a construction material in a liquid environment  
A continuous linear element is used in the form of a fine fibrous trap, delivered in a continuous manner by an ejector (11) placed in a gaseous atmosphere established in an open-bottomed bell (8)...
4664557 Method and apparatus for constructing an underwater fill  
A method of constructing an underwater fill in a manner which enables the formation of a dense fill pile having steep side slopes and having an improved capability to resist erosion. The method...
4664558 Reversible mechanical coupling for tensional anchorages  
A reversible mechanical coupling for tensional anchorages includes a cylindrical body having a widened portion of conical shape capable of causing a set of clamping levers to be radially expanded...
4664556 Method for building structures in water  
A method of construction is provided in which a casing or assemblage of casings which can be handled as a unit is partly immersed in water to a controlled variable depth and used to mould a...
4636114 Buoyancy-supported struts for ocean platforms  
Buoyancy apparatus is provided which allows two or more air canisters (43,45) to be mounted one above the other on a section (7) of a strut, without touching the delicate sides of the highly...
4630970 Buoyancy system for submerged structural member  
A buoyancy system for a tension leg platform tether 10 or other element extending a significant vertical distance through a body of water. A series of bulkheads 25 divide the interior of the tether...
4619557 Corrosion protection for mooring and riser elements of a tension leg platform  
A flame sprayed aluminum coating of high strength steel components offers excellent seawater corrosion protection, increased fatigue life and uniform low level cathodic protection that avoids...
4611953 TLP tendon bottom connector  
A bottom anchor connector for securing the tension legs of a tension leg platform (10) having a flexible joint (26) between a first body member (22) and a second body member (24) including a latch...
Matches 101 - 150 out of 219 < 1 2 3 4 5 >