Wells – Processes – Placing or shifting well part
Patent
1998-04-01
2000-06-06
Lillis, Eileen Dunn
Wells
Processes
Placing or shifting well part
1662427, 166355, 175321, E21B 1707, E21B 2900
Patent
active
060706708
ABSTRACT:
A wellbore motion control apparatus for controlling the motion of a tubular wellbore string (in one aspect with an additional item and/or apparatus connected thereto) in a wellbore extending from a surface down into the earth has been invented which has, in one aspect, a central mandrel connected to the tubular wellbore string, a housing with a hollow interior and fluid therein, at least one fluid passage apparatus disposable in the hollow interior and having a fluid flow channel extending therethrough, and the at least one fluid passage apparatus secured to the central mandrel, the housing surrounding the central mandrel, the at least one fluid passage apparatus disposed for movement in a chamber defined by an inner surface of the housing and an outer surface of the central mandrel, the at least one fluid passage apparatus positioned within the chamber so that fluid therein is flowable therethrough permitting movement of the fluid passage apparatus within the chamber and thereby controlling movement of the mandrel and therefore of the tubular wellbore string in the wellbore. In one aspect, the apparatus has a first upper piston and a second lower piston, each movably disposed in the chamber, the first upper piston secured to the central mandrel so the central mandrel moves with the first upper piston, each piston having a fluid passage apparatus, the first upper piston movable about at least one rod connected to the second lower piston so that the first upper piston is movable downwardly on the at least one rod as fluid passes therethrough to move to abut the second lower piston. In one aspect the pistons move at different rates.
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Carter Thurman B.
Luke Michael
Roberts John D.
Cho Chong S.
Lillis Eileen Dunn
McClung Guy
Weatherford / Lamb, Inc.
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