Coiled tubing injector head

Details Coiled tubing injector head Coiled tubing injector head

2006-03-30

2010-12-28

Neuder, William P (Department: 3672)

Wells

Above ground apparatus

Moving tubing or cable into an existing well

Reexamination Certificate

active

07857042

ABSTRACT:
An improved coiled tubing injector head, comprising a plurality of powered chain loops, each having one practically straight side adjacent to the other chain loop(s) and biased against a tubing running in-between all the loops so as to grip the tubing and allow its transit into and out of a well. The chain loops are assembled from multifunctional links which both transmit drive and also form carriers for replaceable gripper blocks or are the carriers and gripper blocks combined, without need of a roller link chain or chains in addition to the multifunctional links. Three or more chain loops are provided, and the chain loops are driven by electric motors.

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International Search Report dated Jul. 25, 2006 for International application No. PCT/GB2006/001200.
PCT International Preliminary Report on Patentability and Written Opinion issued Oct. 3, 2007 for International application No. PCT/GB2006/001200.

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