High and low tubing pressure actuated well safety valve

Details High and low tubing pressure actuated well safety valve High and low tubing pressure actuated well safety valve

1978-02-23

1979-07-24

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137461, 137463, 137466, 166323, F16K 1700

Patent

active

041619609

ABSTRACT:
A well safety valve adapted to be positioned in a well tubing and close on either a predetermined high tubing pressure or a predetermined low tubing pressure. The valve closure member in the valve body moves between an open and closed position in response to longitudinal movement of a tubular member. The tubular member has an open bore for alignment with the bore of the well tubing to provide straight through flow through the safety valve. In addition, the tubular member has a plurality of telescoping sections and releasable and resettable locking means normally securing the plurality of sections together. A predetermined high tubing pressure or a predetermined low tubing pressure acting on the tubular member causes the valve to close.

REFERENCES:
patent: 2733729 (1956-02-01), Wolfe
patent: 3765443 (1973-10-01), Young

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