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| Number | Title | Issue Date |
| 4919892 | Apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream An apparatus for detecting oil and other lighter-than-water contaminants in an effluent stream in a sewage system. The apparatus includes a disposable detector which floats in the effluent stream and detects oil and other contaminants having a specific gr... | 04/24/1990 |
| 4911244 | Marine casing suspension apparatus An improved wellhead casing hanger for suspension of successive casing strings with particularly small annular spacings having an adapter sleeve of double wall construction which is utilized with a load bearing shoulder on the inside of the inner member f... | 03/27/1990 |
| 4881598 | Blow-out preventor test tool Apparatus and methods are provided for testing a blow-out preventor system of a well, which blow-out preventor system is designed to close upon both a smaller drill pipe string and a larger drill pipe string. The apparatus includes a first elongated cylin... | 11/21/1989 |
| 4817724 | Diverter system test tool and method A method and apparatus for testing a blowout preventer packer element of a diverter system on an offshore drilling rig utilizes an inflatable packer. The packer has a tubular member than extends upward through the diverter packer element. The packer has a... | 04/04/1989 |
| 4554976 | Test tool for subsea blowout preventer stack A test tool adapted for use during pressure testing of a subsea blowout preventer stack is disclosed. The tool has an upper and a lower body connected in a first connection by left hand threads. A check valve landed in the bore of the tool prevents downwa... | 11/26/1985 |
| 4405016 | Underwater Christmas tree cap and lockdown apparatus A cap for an underwater Christmas tree having locking probes to lock down the operating rods of a connector connecting the Christmas tree to an underwater wellhead housing. The tops of the operating rods are housed within hollow canisters at the top of th... | 09/20/1983 |
| 4167215 | Guidelineless subsea wellhead entry/reentry system A guidelineless subsea wellhead system includes TV/sonar guidance components which direct operating and/or service equipment into a position adjacent a subsea wellhead. An offset funnel mounted on the wellhead is used to guide a probe, which is mounted on... | 09/11/1979 |
| 4130161 | Underwater Christmas tree An underwater Christmas tree for controlling flow from an offshore well is disclosed as having a master valve which is controlled by fluid pressure within a flow-line extending from a production bore of the tree, and means for receiving and releasably ret... | 12/19/1978 |
| 4126183 | Offshore well apparatus with a protected production system An offshore well apparatus so constructed and arranged to minimize chances of pollution of sea water by production fluids which may be released as a result of damage to the well apparatus resulting from natural causes, such as, action of masses of ice at ... | 11/21/1978 |
| 4046192 | Method and apparatus for installing a control valve assembly on an underwater well head A method of installing a valve-bearing assembly on an underwater oil well head and for checking the sealing-tightness of the pipes connected thereto, in a single operation without the use of a diver, comprises coupling the assembly to a tool connected to ... | 09/06/1977 |
| 3974875 | Underwater well completion method and apparatus Extended casing method and apparatus for completing an underwater well whereby complete and continuous pressure control is maintained at the surface drilling platform. A conductor casing is installed in the floor of a body of water with a casing head and ... | 08/17/1976 |
| 3971576 | Underwater well completion method and apparatus Extended casing method and apparatus for completing an underwater well whereby complete and continuous pressure control is maintained at the surface drilling platform. A conductor casing is installed in the floor of a body of water with a casing head and ... | 07/27/1976 |
