Tubing insertion and withdrawal apparatus for use with a live we

Details Tubing insertion and withdrawal apparatus for use with a live we Tubing insertion and withdrawal apparatus for use with a live we

1998-02-12

1999-08-17

Schoeppel, Roger

Wells

Above ground apparatus

Moving tubing or cable into an existing well

166 854, 166 855, E21B 3368, E21B 1922

Patent

active

059379430

ABSTRACT:
A coiled tubing injector for inserting and withdrawing a continuous length of tubing from a well, the coiled tubing injector having a tubing insertion and withdrawal assembly with a tubing conveyor assembly moving the tubing upward for withdrawal from the well and downward for insertion into the well. The tubing conveyor assembly has a fixed conveyor and an opposing floating conveyor each with a plurality of gripper blocks that engage the tubing. Each gripper block has a groove having a radius of curvature substantially that of the tubing to provide a close mating relationship of the gripper blocks and the tubing. The floating conveyor is moveable away from the fixed conveyor to create a gap therebetween, and the frame is provided an opening aligned with the gap between the fixed and floating conveyors so that a medial portion of the tubing can pass through the opening into the gap. A conveyor stabilizing assembly draws the floating conveyor toward the fixed conveyor to provide stabilizing support to the floating conveyor, and a grip adjustment assembly draws the fixed and floating conveyors together to close the gap and exert a gripping force on the tubing.

REFERENCES:
patent: 4585061 (1986-04-01), Lyons, Jr. et al.
patent: 5029642 (1991-07-01), Crawford
patent: 5188174 (1993-02-01), Anderson, Jr. et al.
patent: 5291956 (1994-03-01), Mueller et al.
patent: 5309990 (1994-05-01), Lance
patent: 5411085 (1995-05-01), Moore et al.
patent: 5454419 (1995-10-01), Vloedman

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