National Oilwell Varco, L.p.

Nov Intervention and Stimulation Equipment US, LLC

Matthew Stephen Lane

Timothy Scott Steffenhagen

Mike Xiaolei Lu

A coiled tubing injector including two or more drive chains each carrying a plurality of grippers for engaging coiled tubing within a grip zone defined between the two or more drive chains, a drive system including at least one hydraulic motor connected to a drive line and a return line forming a drive circuit for fluidly powering the at least one hydraulic motor, and a tension system including at least one hydraulic cylinder for tensioning the two or more drive chains. The tension system can include a reactive chain tension circuit for automatically tensioning the two or more drive chains by maintaining a pressure differential between a fluid pressure within the drive line and a fluid pressure within the at least one hydraulic cylinder.

Coiled tubing injector with reactive chain tension

A coiled tubing injector system may include a coiled tubing injector guide configured for guiding coiled tubing into a coiled tubing injector and a remotely adjustable guide mechanism. The remotely adjustable guide mechanism may include a guide mount configured for adjustably securing the coiled tubing injector guide to a frame of the coiled tubing injector and a drive mechanism configured for remotely adjusting a position of the guide mount relative to the frame.

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Fort Worth, TX, United States of America

Matthew Stephen Lane