A petroleum well intervention winch system comprising a high pressure confining housing (1) for a drum (2) for a rope (R) to a tool string (T), characterized by said pressure confining housing (1) having a connector (C) with an aperture (A) for said rope (R) to a top of a tool string gate chamber (G) on vertical bore BOP valves on a wellhead (WH) on said petroleum well, said rope from said tool string (T) running through said aperture (A) via a capstan (3) to said drum (2), said capstan (3) driven by a first motor (35) through a first high pressure proof magnetic coupling (34) across a wall of said housing (1), said drum (2) driven by a second motor (25) through a second high pressure proof magnetic coupling (24) across said wall of said housing (1), said capstan (3) subject to a load tension from said rope (R) from said tool string (T) in said well and provided with a hold tension on said rope (R) from said drum (2), said second motor (25) exerting a constant hold tension on rope (R) via drum (2).
Petroleum well intervention winch system
2016-12-22
Patent
Electronic Resource
English
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