Gripper block for coiled tubing injector with variable...

Details Gripper block for coiled tubing injector with variable... Gripper block for coiled tubing injector with variable...

2005-05-17

2005-05-17

Walker, Zakiya (Department: 3672)

Wells

Above ground apparatus

With assembly or disassembly means

C166S077300, C226S173000

Reexamination Certificate

active

06892810

ABSTRACT:
An improved V-style gripper block to better accommodate a variable outer diameter material (e.g. cable, plastic, wire, or pipe). The gripper block comprises a block body being connectable to a gripper chain in an injector apparatus, a gripper plate having arcuate and/or angled gripping surfaces for engaging tubing of various outer diameters, and a flex layer disposed between the gripper plate and the block body to allow the gripping surface of the gripper plate to move relative to the block body to which it is attached. This relative movement allows the gripping surface of the gripper block to rapidly conform to changes in the outer diameter of coiled tubing. In various embodiments, the flex layer may be formed of elastomeric materials including natural or synthetic rubber; an encapsulated gel or liquid within a flexible membrane; or mechanical means such as springs.

REFERENCES:
patent: 5094340 (1992-03-01), Avakov
patent: 5309990 (1994-05-01), Lance
patent: 5553668 (1996-09-01), Council et al.
patent: 5853118 (1998-12-01), Avakov
patent: 6173769 (2001-01-01), Goode
patent: 6230955 (2001-05-01), Parks
patent: 6367557 (2002-04-01), Rosine et al.

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