Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1994-08-23
1995-11-14
Schoeppel, Roger J.
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166382, E21B 3410
Patent
active
054657946
ABSTRACT:
An annular wellhead member has an inner mating surface. The wellhead member has a hydraulic fluid passage with an inboard opening at the inner mating surface. A tubing hanger is landed concentrically within the wellhead member. The tubing hanger has an outer mating surface which mates with the inner mating surface of the wellhead member. A production fluid passage through the tubing hanger places the production tubing string in communication with a production line. A hydraulic line extends from a hydraulically operated downhole safety valve to the tubing hanger. A tubing hanger hydraulic fluid passage has a first opening and an outboard opening. The first opening is connected to the hydraulic line. The outboard opening is located on the outer mating surface of the tubing hanger and registers with the inboard opening of the wellhead member hydraulic fluid passage. The wellhead member hydraulic fluid passage is connected to a hydraulic supply line. An alignment device aligns the outboard opening of the tubing hanger hydraulic fluid passage and the inboard opening of the wellhead member hydraulic fluid passage. A seal ring is concentrically located around the openings. Hydraulic fluid is supplied from the exterior of the wellhead member to the downhole safety valve.
REFERENCES:
patent: 4219223 (1980-08-01), Schulte
patent: 4333526 (1982-06-01), Watkins
patent: 4449583 (1984-05-01), Lawson
patent: 4458903 (1984-07-01), Tohill
patent: 4607691 (1986-08-01), Bridges
patent: 4616857 (1986-10-01), Woodman et al.
patent: 4796922 (1989-01-01), Prichard
patent: 5372199 (1994-12-01), Cegielski et al.
Brammer Norman
Gariepy James A.
McConaughy Brett R.
ABB Vetco Gray Inc.
Bradley James E.
Schoeppel Roger J.
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