A petroleum well intervention winch system includes a high pressure confining housing for a drum for a rope to a tool string. The pressure confining housing has a connector with an aperture for the rope to a top of a tool string gate chamber on vertical bore BOP valves on a wellhead on the petroleum
A petroleum well intervention winch system includes a high pressure confining housing for a drum for a rope to a tool string. The pressure confining housing has a connector with an aperture for the rope to a top of a tool string gate chamber on vertical bore BOP valves on a wellhead on the petroleum well. The rope runs through the aperture via a capstan to the drum. The capstan is driven by a first motor through a first high pressure proof magnetic coupling across a wall of the housing. The drum is driven by a second motor through a second high pressure proof magnetic coupling across the wall of the housing. The capstan is subject to a load tension from the rope and is provided with a hold tension on the rope from the drum. The second motor exerts a constant hold tension on the rope via the drum.
대표청구항▼
1. A petroleum well intervention winch system comprising: a high pressure confining housing for housing a drum for a rope, the rope being connected to a tool string,said pressure confining housing having a connector with an aperture for said rope, the connector being coupled to a top of a tool strin
1. A petroleum well intervention winch system comprising: a high pressure confining housing for housing a drum for a rope, the rope being connected to a tool string,said pressure confining housing having a connector with an aperture for said rope, the connector being coupled to a top of a tool string gate chamber disposed on vertical bore BOP valves on a wellhead of said petroleum well,said rope running from said tool string through said aperture and via a capstan to said drum,said capstan driven by a first motor through a first high pressure proof magnetic coupling across a wall of said housing,said drum driven by a second motor through a second high pressure proof magnetic coupling across said wall of said housing,said capstan subject to a load tension from said rope from said tool string in said well, the rope being provided with a hold tension from said drum, andsaid second motor exerting a constant hold tension on said rope via said drum. 2. The intervention winch system of claim 1, wherein said drum has a vertical axis. 3. The intervention winch system of claim 1, wherein said high pressure confining housing is vertical cylindrical, said aperture being positioned in a bottom portion of said high pressure confining housing. 4. The intervention winch system of claim 1, wherein said rope is laid over a weight wheel with a weight sensor measuring the tension applied from said rope and tool string. 5. The intervention winch system of claim 1, wherein a length of said rope extends into the petroleum well and said rope is laid over a depth counting wheel provided with a counter for measuring the length of the rope extended into said petroleum well. 6. The intervention winch system of claim 1, comprising a high pressure proof, signal connector bulkhead in said high pressure confining housing for conducting sensor signals at least from a weight sensor and from a depth counter. 7. The intervention winch system of claim 6, wherein said connector bulkhead is arranged vertically and in a lower portion of said high pressure confining housing. 8. The intervention winch system of claim 1, wherein said first magnetic coupling has a vertical rotation axis and is arranged in a base portion of said high pressure confining housing. 9. The intervention winch system of claim 1, wherein said second magnetic coupling has a vertical rotation axis and is arranged in a base portion of said high pressure confining housing. 10. The intervention winch system of claim 1, wherein said second motor exerts a constant torque or tension on said drum at least when hauling said rope from said well. 11. The intervention winch system of claim 1, wherein said capstan comprises a first capstan wheel. 12. The intervention winch system of claim 1, wherein said capstan comprises a first capstan wheel and a second capstan wheel. 13. The intervention winch system of claim 12, wherein said second capstan wheel is driven by a chain, a gear or a belt transmission from said first capstan wheel. 14. The intervention winch system of claim 12, wherein said first and second capstan wheels have parallel axes and are generally co-planar. 15. The intervention winch system of claim 12, wherein said first and second capstan wheels are provided with parallel grooves for guiding and separating turns of said rope. 16. The intervention winch system of claim 1, further comprising a first reduction gear between said capstan and said first magnetic coupling. 17. The intervention winch system of claim 16, further comprising a second reduction gear between said drum and said second magnetic coupling. 18. The intervention winch system of claim 17, wherein said first reduction gear has a first, horizontal axle for driving said capstan and a second, vertical axle driven via said second magnetic coupling by said second motor. 19. The intervention winch system of claim 1, wherein said high pressure confining housing is sub-divided into a base portion and a vertical cylindrical portion with a dome top. 20. The intervention winch system of claim 19, wherein said base portion holds: said capstan, said first magnetic coupling, said first motor, said drum with said second magnet coupling, and said second motor. 21. The intervention winch system of claim 19, wherein said base portion holds a signal line bulkhead connector. 22. The intervention winch system of claim 1, wherein said drum is provided with a parallel connected diamond screw with a shuttle with a horizontal axis sheave for guiding said rope from said capstan and a vertical axis sheave for guiding said rope to said drum. 23. The intervention winch system of claim 1, wherein said first motor is arranged replaceably externally on an ambient pressure side of the first magnet coupling. 24. The intervention winch system of claim 1, wherein said rope comprises one or more electrical signal conductors connected via a slip ring of said rotating drum to a static takeoff connected further to a bulkhead connector for allowing communication between the tool string in said well and equipment at an ambient pressure side of said housing. 25. The intervention winch system of claim 1, wherein said rope comprises one or more optical signal conductors. 26. The intervention winch system of claim 1, wherein said first magnetic coupling comprises a cylindrical pressure can forming a high pressure barrier integrated in a wall of said high pressure housing, said first magnetic coupling comprising an inner rotor with inner magnets exerting magnetic forces across a wall of said cylindrical pressure can to outer magnets of a cylindrical outer rotor at a high pressure side, andwherein said outer rotor is further connected directly or indirectly, via a first gear box, to said capstan.
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이 특허에 인용된 특허 (6)
Kreuter Kenneth G. (P.O. Box 809 Osage Beach MO 65065), Capstan winch with fixed internally grooved sleeve.
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