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| Number | Title | Issue Date |
| 4862426 | Method and apparatus for operating equipment in a remote location An improved method and apparatus for operating or setting equipment within a subsea marine wellhead from the surface having an indicating signal provided at the surface of the successful completion of such operation. The steps of the method include the lo... | 08/29/1989 |
| 4848471 | Method and apparatus for transporting unprocessed well streams System for the transport of an unprocessed well stream comprising a multiphase, multicomponent mixture over long distances from one or several subsea wells A to a terminal F. The well stream, which is transported in one or several pipelines (10), running ... | 07/18/1989 |
| 4848475 | Sea bed process complex A sea bed oil producing and processing complex has a template with three bays housing pairs of modules, viz, well, gas and oil production modules. The complex includes a separator for separating oil and gas and a pump for the produced oil, and bars having... | 07/18/1989 |
| 4784526 | Arctic offshore structure and installation method therefor An arctic offshore platform adapted for use in hydrocarbon exploration and production operations conducted in relatively shallow waters with low to moderate ice environments. The arctic offshore platform of the present invention includes one or more suppo... | 11/15/1988 |
| 4719937 | Marine riser anti-collapse valve A marine riser anticollapse valve is disclosed for preventing a marine riser from collapsing under external sea water pressure in the event of a sudden loss of internal drilling fluid pressure. An external valve structure is provided for each of a plurali... | 01/19/1988 |
| 4658903 | Method for handling wellhead assembly A method for handling an underwater wellhead assembly by means of an offshore jack-up drilling rig or platform wherein the wellhead assembly is prepared on the shore or quay and is carried on the drilling rig to a preselected drilling location and lowered... | 04/21/1987 |
| 4646839 | Method and apparatus for through-the-flowline gravel packing Methods of gravel packing a subterranean well located subsea utilizing through-the-flowline techniques are disclosed in which a sand slurry is pumped downwardly through one pipe of a dual pipe string and outwardly through an H-type crossover member (14, 1... | 03/03/1987 |
| 4612993 | Riser position indication apparatus Apparatus for use in drilling a well from a floating vessel by means of a riser, which connects the vessel's drilling equipment to a wellhead assembly adjacent to the ocean floor. The riser moves substantially vertically in relation to the vessel, as the ... | 09/23/1986 |
| 4570717 | Anti-twist control system for deviated conductor driving systems A system for controlling the deviation of the path of oil or gas well conductor casing at a desired angle, curvature and orientation in the sea bottom stratum through which it is driven from an offshore platform involving the use of conductor guide(s) equ... | 02/18/1986 |
| 4558744 | Subsea caisson and method of installing same A subsea caisson or silo for housing wellhead equipment and methods of installing it is disclosed. A caisson which is sized to receive equipment that is to remain subsea has a closed top and open bottom. The caisson is lowered to the seabed and hydrostati... | 12/17/1985 |
| 4526232 | Method of replacing a corroded well conductor in an offshore platform A method of replacing a corroded well conductor positioned in an oil production platform at an offshore location. After shutting in or killing the well, the wellhead is removed and the sections of the casing and tubing strings within the well conductor ab... | 07/02/1985 |
| 4519727 | Offshore well head protector and method of installation A well head protector for a well which is located at the floor of an offshore body of water. The protector includes a plurality of discrete sub-assemblies which, for installation purposes, are initially transported to a drilling vessel and positioned abov... | 05/28/1985 |
| 4474243 | Method and apparatus for running and cementing pipe A jet shoe, connected to the lowermost end of a large diameter pipe to be placed in a subsea formation, comprises a cylindrical housing in which is arranged an inner tubular receptacle, a check valve permitting downward flow but preventing upward flow and... | 10/02/1984 |
| 4456072 | Ice island structure and drilling method An off-shore ice island structure for location over a submerged drill site in waters which normally freeze in winter. The structure includes a buoyant protective caisson which freezes in position over the drill site upon onset of winter. A barge floats on... | 06/26/1984 |
| 4286658 | Isolation packer and methods of cementing from a floating vessel The extended length isolation packer of the present invention comprises upper and lower tubular body assemblies which are interconnected by a middle body. The upper tubular body assembly has an upper packer assembly and a closing positioner attached to it... | 09/01/1981 |
| 4134461 | Marine structure and method of drilling a hole by means of said structure A bottom-positioned well drilling platform is provided with an enclosure in the lower part thereof which forms a chamber into which returning drilling mud and cuttings can be discharged. A pump and separate return line raise the mud alone from the chamber... | 01/16/1979 |
| 4112687 | Power source for subsea oil wells Disclosed are methods and apparatus for generating electric and hydraulic power adjacent an undersea oil well for use in operating the well-head equipment. The difference in the temperature of the oil being extracted from the well and the temperature of t... | 09/12/1978 |
| 4110628 | Solar sea power system Described is an ocean thermal energy conversion system wherein floating, submerged and fixed drilling platforms installed offshore primarily for exploration and/or production of hydrocarbons serve also as working and supportive bases for means for produci... | 08/29/1978 |
| 4109478 | Unitized conductor guide and frame for offshore drilling and production A novel guide member and guide member support arrangement for guiding a drill conductor from a deck portion of an offshore platform into the bottom of a body of water is disclosed. The guide member is snugly nestled against and positioned within the guide... | 08/29/1978 |
