Tubing hanger

Details Tubing hanger Tubing hanger

1995-03-03

1998-01-13

Schoeppel, Roger J.

Wells

Above ground apparatus

Inner member anchor or seal with valve

166 884, 166 7514, E21B 3304

Patent

active

057068933

ABSTRACT:
A tubing hanger is provided with a production bore and an annulus bore spaced radially outwardly of the production bore. The annulus bore is closed by a valve member in the form of an annular disc that is rotatable by a piston provided in the tubing hanger to move between a position in which the aperture in the valve member is aligned with the annulus bore and a position in which spaced parallel upper and lower surfaces of the valve member close the annulus bore.

REFERENCES:
patent: 3536342 (1970-10-01), Hull et al.
patent: 3603401 (1971-09-01), Nelson et al.
patent: 3834460 (1974-09-01), Brun et al.
patent: 3897824 (1975-08-01), Fisher
patent: 4067062 (1978-01-01), Baugh
patent: 4958686 (1990-09-01), Putch

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