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7451821 |
Blow out preventer transfer platform
An offshore well drilling assembly includes a drilling facility or support platform for location at sea. A drilling platform connects to the support platform so the drilling platform is...
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7410326 |
Auxiliary reaction frame system for cantilevered jack-up rigs, and method therefore
A retractable stern reaction frame for reinforcing self elevating platform cantilever beams. The preferred embodiment contemplates a support framework mounted on a self elevating platform transom...
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7377335 |
Method and apparatus for movement of drilling equipment between adjacent locations
An apparatus and method for the movement of drilling equipment between topographically adjacent drilling locations comprises positioning a transportable planar surface over the adjacent drilling...
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7234896 |
Vertically folding service arm for a movable platform offshore drilling or servicing rig
An apparatus and method for maintaining electrical and hydraulic connections between a junction box (or junction boxes) located on or near an offshore platform's floor and a movable drilling rig...
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7101117 |
Minimized wave-zone buoyancy platform
Minimized Wave-zone Buoyancy is a new approach to oil and gas platform design with superior construction and performance characteristics compared to state-of-art off-shore drilling and production...
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7083004 |
Cantilevered multi purpose tower and method for installing drilling equipment
A drilling rig having a deck capable of being used offshore and a method for commissioning a well using the drilling rig and a method for decommissioning a well using the drilling rig, wherein the...
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6997647 |
Active hold down system for jack-up drilling unit
A cantilever beam of a jack-up unit is provided with constant force restraining members mounted on a deck of a jack-up unit forward from conventional hold-down cantilever beam clamp. A modified...
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6729804 |
Cantilevered tower for jack-up platform
A Jack Up drilling rig having a deck capable of being used offshore made of a cantilever which is mounted so as to be moveable in a first direction and a second direction, a Multi Purpose Tower...
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6491477 |
Self-elevating drilling unit
A self-elevating drilling unit has dual cantilever assemblies that move longitudinally and transversely in relation to the jack-up platform to allow drilling operation to be performed from two...
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6481931 |
Cantilever supported drilling rig
The derrick is configured to place the lift axis of the crown block toward the aft end of the rig floor. Major floor loads such as draw works are moved closer to the platform. The spare line spool...
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6406222 |
Mooring construction
A floating construction ( 11 ) such as for instance a SPAR buoy, which is connected to the seabed ( 32 ) by tethers and/or risers ( 15, 16 ). At the top part the floating construction ( 11 )...
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6390732 |
Jack-up, movable drilling platform having a telescoping outrigger
A jack-up, movable drilling platform comprises a telescopic outrigger structure which is movable between a retracted position where it is located above the drilling platform's deck and an extended...
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6217258 |
Dual hoist derrick system for deep sea drilling
A dual hoist derrick system for deep sea drilling, capable of elevating a very long and massive heavy object involved in a drilling for deep sea, is provided with a normal drilling hoisting system...
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6210076 |
Offshore deck installation
A method and apparatus that eliminates the need for a derrick barge to lift the deck into place on a floating offshore structure. A connector is used to connect the transport barge to the floating...
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6171027 |
Cantilevered jack-up platform
A drilling rig, in particular for the offshore industry, in the form of a jack-up platform on which a cantilever is mounted so as to be movable at least substantially horizontally and in a first...
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6161358 |
Modular mobile drilling system and method of use
A modular mobile drilling system and method of use supports land-based drilling operations on remote sites. Plural support boxes fixedly deployed in first and second rows define a drilling zone. A...
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6030148 |
Method for improving the feasibility of a drilling rig of jack-up type and a drilling rig of jack-up type
A method and apparatus for an improved drilling rig of jack-up type is provided. The drilling rig has a frame part comprising a working deck and an essentially plane-shaped bottom. Three feet are...
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5997217 |
Shallow water well-drilling apparatus
A submergible vessel for use in shallow-water oil drilling includes a pair of spaced pontoons selectively submergible and raisable in water by the admission and expulsion of water, a main deck, a...
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5492436 |
Apparatus and method for moving rig structures
Disclosed is an improved apparatus and method of moving a large, heavy structure or piece of machinery, such as an oil rig structure on an offshore platform. A plurality of load bearing plates are...
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5407302 |
Method and apparatus for skid-off drilling
A different approach to tender assisted drilling which has the flexibility to be used with multiple jack-up rigs, and nearly any type of fixed offshore production platform. A skid base includes...
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5290128 |
Method and apparatus for transferring a drilling apparatus from a movable vessel to a fixed structure
A skidbase 16 and a drilling structure 18 are adapted for transfer between a jack-up platform 12 and a fixed platform 14. The jack-up platform 12 is moved into position adjacent the fixed platform...
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5139367 |
System for moving drilling module to fixed platform
A system for aligning a drilling module on a jack-up rig with a drilling module support surface on a fixed rig wherein the angular disposition of the drilling module is varied by moving a portion...
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5051035 |
Bearing system for a turning means
A device for supporting a turntable (1) on a vessel, especially a vessel for use in connection with drilling for and production of oil, which vessel is anchored to the sea floor, via the turntable...
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4973198 |
Offshore drilling rig transfer
Method and apparatus for transferring a derrick from a jack-up rig to an offshore platform are disclosed which include positioning the rig and platform next to each other, providing an elevator pad...
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4913591 |
Mobile marine platform and method of installation
A mobile marine drilling assembly has a horizontally disposed pontoon which floats on or is submerged below the surface of a marine environment. A first vertically disposed column is secured to the...
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4848966 |
Arrangement in a production platform
A production platform for offshore exploitation of hydrocarbons comprises a truss tower (1) which rests on the sea floor (2) and supports a deck structure (3) provided with a drilling module (5)....
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4823870 |
Cantilever drilling structure
A cantilevered drilling structure including a base unit having a side positionable generally adjacent a well head, and a drilling rig mast assembly positioned generally above and supported by the...
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4716972 |
Floating drilling platform
A floating semisubmersible off-shore drilling platform or the like comprises an upper working level portion and a lower pontoon portion. When the platform is transported from one place to another,...
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4630681 |
Multi-well hydrocarbon development system
A multi-well hydrocarbon development system is economically established and operated by drilling cluster wells through the piles securing the base structure which supports a semisubmersible tension...
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4609306 |
Ice-breaking off-shore drilling and production structure
An ice-breaking structure having a platform member adapted to be flexibly connected to an off-shore fixed well shaft in a manner which allows the platform to lift and/or tilt relative to the shaft...
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4574241 |
Marine surveying apparatus and method for locating pipelines buried under the seabed
A marine pipeline surveying apparatus useful for locating buried pipelines includes a barge having a work deck with a dolly mounted on the work deck for movement on the deck upon a provided track....
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4483644 |
Cantilevered mobile marine rig with hydraulic load equalizer
Disclosed is a cantilever mobile marine rig with hydraulic load equalizer. The rig includes a deck structure and a cantilever assembly slidingly mounted on the deck structure. The hydraulic load...
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4422791 |
Universal joint construction for use in anchoring a surface platform to a sea bed
The universal joint construction for use at the bottom of a connection between a surface platform and a foundation anchored on the bottom of the sea comprises an outer top ball cup which is adapted...
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4401398 |
Support structure for mudline suspension wellhead
A support structure (20) for supporting the freestanding portion of a mudline suspension wellhead includes first and second support arms (56) attached to and extending from an offshore drilling...
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4389141 |
Marine structure having a deck or work platform supported by absorbing mechanisms
A support arrangement for a platform held in suspension from an offshore frame structure which provides damping between the structures in inverse proportion to the magnitude of a seismic shock. The...
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4295758 |
Working platform for oil drilling operations in ice covered sea areas
A working platform for oil drilling operations in ice covered sea areas, which essentially comprises oil drillig equipment, an oil drilling pipe connecting the oil drilling equipment to the sea...
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4288177 |
Walking platform construction
A walking platform construction comprises a barge or work platform and a plurality of legs movable in a vertical direction and securable with respect to the barge or platform. The barge or platform...
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4208158 |
Auxiliary offshore rig and methods for using same
An auxiliary offshore rig adapted to be used for relieving the primary offshore rig on an offshore platform of well activities relating to tubular member or cable operations. The auxiliary offshore...
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4161376 |
Offshore fixed platform and method of erecting the same
Disclosed is an improved fixed offshore platform and method of erecting the same. The platform has an open truss structure with upper and lower deck levels. The upper deck has removable floor...
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4134702 |
Arrangement of platform deck for oil rigs or the like
An upper deck structure which contains the equipment necessary for operation of an oil rig is positioned on top of the main deck of the rig, the main deck being supported by vertical pilings or...
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4103503 |
Drilling substructure transfer system
An apparatus and method for providing a drilling rig substructure on a fixed platform which includes the transfer of the drilling rig substructure from a movable jack-up type rig to an adjacent,...
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4090368 |
Offshore platforms
An offshore platform including a deck with an aperture formed through it and a number of clamping means carried by the deck. The clamping means, which may comprise opposed doors, are mounted so as...
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4081932 |
Platform crane
A mobile crane for use on an offshore oil well platform, comprising parallel base beams adapted to span the capping beams of the platform, and a pedestal and a rotating upper works movably mounted...
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4068487 |
Method and apparatus for conducting subaqueous operations in ice conditions
An improved platform for performing subaqueous operations in ice conditions. A substructure on the platform supports the equipment for performing the subaqueous operation and straddles an aperture...
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4033056 |
Spud guide means in a dredging vessel
A dredging vessel has a vertically elongated spud guide in a well in the vessel, the guide being supported for horizontal movement in the well and for swinging movement in a vertical plane....
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3955521 |
Tension leg platform with quick release mechanism
A tension leg marine structure in which a buoyant vessel is maintained in a partially submerged condition by a plurality of hold-down cables. Each cable is fastened to the floating portion of the...
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3871184 |
POSITION AND ANCHORING SYSTEM FOR OFF-SHORE DRILLING PLATFORM
A monopad drilling structure in which the bottom of the structure is a flat surface resting on the ocean floor. A submerged cellar structure is emplaced over the drill site. Cables extend from the...
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3769802 |
WALKING LIFT BARGE
A walking lift barge includes a platform having a rotatable member rotatably mounted thereon. A pair of spaced-apart substantially vertical legs extend through the rotatable member. The legs are...
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3700014 |
APPARATUS FOR TRANSFERRING FLUID FROM AN UNDERWATER STORAGE UNIT TO A FLOATING VESSEL
Apparatus for transferring fluid between an underwater storage unit and a floating vessel has a rigid elongated member with its lower end connected to the storage unit through a universal joint, a...
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3693363 |
EQUIPMENT FOR MOVING STEP BY STEP A STRUCTURE CARRYING OUT OPERATIONS SUPPORTED ON A SEA-BED OR THE LIKE
A mobile marine platform can be supported on as few as three legs, with the legs vertically and horizontally adjustable so as to move the platform laterally, by surrounding each leg with an...
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