Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1980-09-29
1982-11-02
Chambers, A. Michael
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251121, 251266, 138 44, 138 45, 277235A, F16K 4704
Patent
active
043569978
ABSTRACT:
A flow control mechanism for high pressure wells comprises a body structure having inlet and outlet passages and adapted for connection to a wellhead in such manner that a metering device meters the flow of production fluid through the inlet and outlet passages. The body structure defines an access opening that is ordinarily maintained closed by a closure element received within the access opening. An annular sealing element is received within an annulus defined between the body structure and the closure element and is formed to define a frusto-conical sealing surface that engages a frusto-conical seat surface defined by the closure element and establishes a high pressure seal between the body structure and closure element. The sealing element is composed of a hard metal such as steel and the sealing surface defined thereby is of slightly differing angle as compared to the angle of the seat surface, thus causing the sealing element to yield radially outwardly upon assembly by virtue of a camming activity to provide a seal both against the seat surface and with respect to the body structure. The sealing element is partially impregnated and coated with a friction-resistant polymer such as polytetrafluoroethylene.
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Chambers A. Michael
Quality Valve and Machine Works, Inc.
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