Wells – Above ground apparatus – Moving tubing or cable into an existing well
Patent
1981-12-21
1984-03-20
Novosad, Stephen J.
Wells
Above ground apparatus
Moving tubing or cable into an existing well
166 775, 175 5, E21B 720
Patent
active
044375158
ABSTRACT:
A jacking mechanism for lowering a string of casing or other well pipe into a well includes two structures which extend generally vertically beneath the floor of a drilling rig and which have portions functioning as power operated actuating units for moving one of two pipe supporting units upwardly and downwardly relative to the other, with the two specified generally vertical structures being offset circularly about the well axis from the location of a tubular mousehole element, and with one or more blowout preventers beneath the rig floor having a portion projecting outwardly away from the well axis at a location circularly between one of the generally vertical structures of the jacking mechanism and the mousehole.
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Boyadjieff George I.
Campbell Andrew B.
Green William P.
Neuder William P.
Novosad Stephen J.
Varco International, Inc.
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