Pressure-controlled well tester adapted to be selectively retained in a predetermined operating position
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United States of America Patent
Stats
-
Aug 16, 1994
Issued Date -
N/A
app pub date -
Oct 9, 1991
filing date -
Oct 27, 1988
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In the present invention a testing tool having an axial flow passage is arranged to be connected in a pipe string and placed in a well bore. Communication through the flow passage is controlled by a valve member which is cooperatively arranged in the body to be moved back and forth for selectively opening and closing communication through the flow passage. The testing tool further includes upper and lower mandrels that are selectively coupled together by a unique clutch mechanism that enables the valve member to be successively opened and closed as the well bore pressure is increased and decreased a predetermined number of times in a testing cycle. The clutch mechanism is thereafter operable for temporarily uncoupling the mandrels to enable the valve member to be retained in its open position as the well bore pressure is increased and decreased in a subsequent operating cycle of the test valve before resuming the testing operation.
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Family
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Cited Art Landscape
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