US 2014/0174716 A1Published application

Petroleum well intervention winch system

AssigneeCapwell AS

InventorsMorten Talgø, John Helvik

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Abstract

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.

Claims26

Dependent claims

A petroleum well intervention winch system comprising:

a high pressure confining housing for a drum for a rope to a tool string,
said pressure confining housing having a connector with an aperture for said rope to a top of a tool string gate chamber on vertical bore BOP valves on a wellhead on said petroleum well,
said rope from said tool string running through said aperture 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 and provided with a hold tension on said rope from said drum, and
said second motor exerting a constant hold tension on said rope via said drum.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/235,410Filed 10 Sep 2012
Priority: NO 201112198 Sep 2011
Published: 26 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

E21B 23/14
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells: for displacing a cable or a…
E21B 19/008
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables: winding units,…
E21B 33/076
Having provision for introducing objects or fluids into, or removing objects from, wells: specially adapted for underwater installations
E21B 41/0007
Equipment or details not covered by groups E21B15/00 - E21B40/00: for underwater installations