Hydraulic circuit use in wireline formation tester

Details Hydraulic circuit use in wireline formation tester Hydraulic circuit use in wireline formation tester

1989-01-26

1989-12-05

Chapman, John

Measuring and testing

Borehole or drilling

Downhole test

7386301, 7386463, 166264, E21B 4910

Patent

active

048844390

ABSTRACT:
A formation tester is set forth. It incorporates a probe having a surrounding elastomeric seal and snorkel for extension into formations. The probe connects with a sample line into the formation tester. On the sample line, a pressure sensor responds to pressure observed in the sample line and provides a signal for use in control of a motor controller opening and closing relative to hard valve elements and valve seats in a choking action to control flow in the sample line. The sample line then goes to a soft seat valve assembly having a valve element and a seat which delivers controlled sample flow into a chamber for storage within the formation tester.

REFERENCES:
patent: 4339948 (1982-07-01), Hallmark
patent: 4375164 (1983-03-01), Dodge et al.
patent: 4593560 (1986-06-01), Purfurst
patent: 4676096 (1987-06-01), Bardsley et al.
patent: 4829835 (1989-05-01), Welker

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