Wireline cable head for use in coiled tubing operations

Details Wireline cable head for use in coiled tubing operations Wireline cable head for use in coiled tubing operations

E - Fixed Constructions

21

B

E21B 41/00 (2006.01) E21B 17/20 (2006.01) E21B 21/10 (2006.01)

Patent

CA 2150159

The invention is a wireline cable head adapted to be used on a wireline tool string which is conveyed into a wellbore by a coiled tubing. The cable head comprises a biased, piston-type check valve which enables fluid circulation from the tubing into the wellbore, but prevents fluid flow from the wellbore into the coiled tubing. The biasing means maintains a minimum differential pressure which must be pumped into the coiled tubing to enable fluid circulation from the coiled tubing into the wellbore. The cable head also comprises a bulkhead for maintaining hydraulic integrity of the cable head after the cable is extracted from the cable head.

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