Coiled tubing injector head
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United States of America Patent
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Dec 28, 2010
Issued Date -
N/A
app pub date -
Mar 30, 2006
filing date -
Mar 30, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
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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