Wellbore fluid sampling apparatus

Details Wellbore fluid sampling apparatus Wellbore fluid sampling apparatus

1987-04-10

1988-08-30

Novosad, Stephen J.

Wells

Receptacles

Bottom receiving and side discharge valves

166169, 166264, E21B 4908

Patent

active

047669551

ABSTRACT:
A wellbore fluid sampling apparatus includes an elongated tubular housing having a floating piston disposed therein and dividing a bore in the housing into first and second chambers, one of the chambers being in communication with ports in the sidewall of the housing for receiving a sample of wellbore fluid in response to movement of the piston to enlarge the one chamber. The other chamber is charged with a liquid to prevent displacement of the piston until a control valve in the housing allows charging fluid to escape into a reservoir chamber whereby the piston moves to receive the fluid sample under wellbore pressure. The floating piston actuates a rod connected to a closure member to close off the bore in the fluid sampling chamber when a suitable fluid sample is obtained. A detent locks the actuating rod and the closure member in the closed position to capture the fluid sample for retrieval and analysis.

REFERENCES:
patent: 2911047 (1959-11-01), Henderson
patent: 3254531 (1966-06-01), Briggs, Jr.
patent: 3294170 (1966-12-01), Warren et al.
patent: 4417622 (1983-11-01), Hude
patent: 4502537 (1985-03-01), Carter, Sr.
patent: 4597439 (1986-07-01), Meek

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