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

1994-06-14

1995-02-28

Novosad, Stephen J.

Wells

With electrical means

166384, 166385, 166 50, 166325, E21B 1922, E21B 33072, E21B 2300, E21B 3400

Patent

active

053928512

ABSTRACT:
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.

REFERENCES:
patent: 4577687 (1986-03-01), Lanmor, II
patent: 4862958 (1989-09-01), Pringle
patent: 5141051 (1992-08-01), Lenhart

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