Lifting apparatus and method for oil field related services

Details Lifting apparatus and method for oil field related services Lifting apparatus and method for oil field related services

2005-01-11

2005-01-11

Bagnell, David (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S085400, C254S285000, C254S286000, C254S385000

Reexamination Certificate

active

06840326

ABSTRACT:
Apparatus and method are provided for lifting heavy loads beneath the floor of a drilling rig or a platform. A base skid supports tables to which winch bases are attached. Winches, usually four in number, are placed on the winch bases and the cables of the winches are placed through sheaves and attached to a double line bar. Sheaves are attached to a load, such as a blowout preventer. Cradle lines may support a blowout preventer. Load cells may be used with the winch cables.

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patent: 6318931 (2001-11-01), Khachaturian

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