Gripper block for coiled tubing injectors
AssigneeHalliburton Energy Services, Inc.
InventorVladimir A. Avakov
Life of this patent
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Abstract
A gripper block for use in grippingly engaging coil tubing, pipe, rod, cable, or like objects having various outside dimensions for ultimately applying a longitudinal load thereto. The subject gripper block has an attachment point preferably at or near the center of the block body to enable attachment to at least one endless chain of an injector apparatus. The gripper block further has a pair of gripper surfaces formed thereon, these gripper surfaces are generally planar and tilted away from each other so as to diverge away from the tubing to be gripped at approximately 90 degrees. The gripper surfaces thus preferably provide a V-shaped engagement configuration which is quite effective in gripping objects of differing outside dimensions with no or minimal scarring of such objects.
Claims9
A gripper block for use in connection with a device having at least one gripper chain for moving a rod, pipe, coiled tubing, cable, or like elongated object, the gripper block comprising:
- a) a block body having a longitudinal axis and a single generally centrally located lateral axis having a bore coincident thereto, a first end having a tongue, a second end having a recessed region for accommodating a tongue of an adjacent gripper block;
- b) a laterally oriented means of attaching the block body onto a chain coincident to the single generally centrally located lateral axis of the block body;
- c) a gripping region means for engaging the tubing and transmitting injection and extraction forces upon the elongated object;
- d) the gripping region having a pair of opposing surfaces being carried on the block body, the surfaces extending perpendicularly from the longitudinal axis of the block body and generally diverging with respect to the longitudinal axis of the block body;
- and
- e) the opposing surfaces of the gripping region having ridges defined by alternating crests and roots.
Dependencies are inferred from the claim text.