Bi-directional grip mechanism for a wide range of bore sizes
AssigneeSchlumberger Technology Corporation
InventorsRoger A. Post, Todor K. Sheiretov, Carl J. Roy, Joseph F. Cordera
Life of this patent
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Abstract
A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising: a first arm; a bi-directional gripping cam rotatably attached to the arm; and an extension and locking device adapted to selectively radially extend the arm from a tool housing to an inside wall of a conduit and adapted to selectively lock the arm in an extended position.
Claims23
A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising:
- a first arm;
- a bi-directional gripping cam rotatably attached to the arm;
- and
- an extension and locking device adapted to selectively radially extend the arm from a tool housing to an inside wall of a conduit and adapted to selectively lock the arm in an extended position.
An apparatus for selectively gripping and releasing the inside wall of a conduit, the apparatus comprising:
- a plurality of linkages, each linkage comprising a first arm having a first end and a second end;
- a second arm having a first end and a second end, the second end of the first arm pivotably attached to the second end of the second arm, and a bi-directional gripping cam rotatably attached to at least one of the second end of the first arm and the second end of the second arm;
- a grip body, the first end of the first arm pivotably attached to the grip body;
- a hub, adapted to slide relative to the grip body, the first end of the second arm pivotably attached to the hub;
- and
- an extension and locking device adapted to selectively slide the hub so as to radially extend the linkages from the grip body and adapted to selectively lock the hub so that the linkages remain locked in an extended position.
A method for conveying a tool body through a conduit, comprising:
- (a) moving a bi-directional gripping cam into contact with an inner wall of a conduit;
- (b) laterally locking a position of the cam;
- and
- (c) moving the tool body axially with respect to the cam in a first direction.
Dependencies are inferred from the claim text.