Apparatus and method utilizing a coiled tubing injector for remo

Details Apparatus and method utilizing a coiled tubing injector for remo Apparatus and method utilizing a coiled tubing injector for remo

1998-02-25

1999-11-02

Bagnell, David

Wells

Above ground apparatus

Moving tubing or cable into an existing well

166 771, 166 772, 226172, 254372, E21B 1908, E21B 1922

Patent

active

059752033

ABSTRACT:
Apparatus and method for pulling or inserting jointed pipe sections (18) having upset ends (20) within a well utilizing a coiled tubing injector (26). The coiled tubing injector (26) has a pair of opposed endless chains (50, 52) including gripper blocks (58) for gripping the pipe sections (18). An axial gap (G) is provided in chains (50, 52) between adjacent gripper blocks (58) to receive the upset ends (20). To align accurately upset ends (20) with gap (G), a sensing mechanism (100, FIGS. 11 and 12) is provided to sense the location of upset end (20) and a sensing mechanism (110, 112, FIGS. 13 and 14) is provided to sense the location of gap (G). An operator in response to signals from the sensors accurately aligns upset ends (20) with gap (G).

REFERENCES:
patent: 3285485 (1966-11-01), Slator
patent: 4655291 (1987-04-01), Cox
patent: 5775417 (1998-07-01), Council
patent: 5918671 (1999-07-01), Bridges et al.

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