E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/52
E21B 19/08 (2006.01) E21B 19/22 (2006.01)
Patent
CA 1265998
ABSTRACT Apparatus for injecting pipe or tubing into a well bore having a frame, a pair of opposed endless drive chains arranged in a common plane in opposed spaced apart relation defining a tubing and pipe pathway between the chains, the chains being movable toward and away from the pathway to grip and release the pipe or tubing as needed. Upper and lower spaced apart pressure beams are mounted within the drive chains and are actuatable independently for alternately pressing upper and lower portions of the chains together for injecting pipe and to permit passage of pipe joints. The apparatus includes means for limiting the travel of the pressure beams so that when the device is used without large obstructions passing through it, such as a quill or pipe joints, the travel time required maybe reduced, and thus, the speed of injecting a pipe or tube increased. The device is mounted on a wellhead for injection pipe or tubing into a well. When injecting coupled pipe, the lower pressure beams are moved together to move the pipe and coupling downwardly between the upper and lower pressure beams. The lower pressure beams are then opened and the upper pressure closed to continue pipe injection moving the pipe coupling through the lower portion of the endless chains into the well. Prior art injectors do not include either the upper and lower pressure beam apparatus for passing pipe obstructions such as joint or the pressure beam travel limiting devices for improving the speed of operation.
517809
Otis Engineering Corporation
Riches Mckenzie & Herbert Llp
LandOfFree
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