Method of performing wireline perforating and pressure measurement using a pressure measurement assembly disconnected from a perforator
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United States of America Patent
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Nov 20, 1990
Grant Date -
N/A
app pub date -
Nov 22, 1989
filing date -
Nov 22, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of perforating includes lowering a perforator and attached pressure measurement gauge assembly into a wellbore on wireline until the gauge assembly touches a bottom of the wellbore. Continued lowering of the wireline into the wellbore produces a slack on the wireline, the slack allowing the perforator to disconnect from the gauge assembly. The perforator is pulled uphole until the perforator is within a predetermined distance from the gauge assembly. Further pulling of perforator uphole ceases. The perforator is ready to be detonated. When well fluid is produced from the formation, the gauge assembly, resting on the wellbore bottom, records the pressure of the well fluid flowing from the formation. The perforator is retrieved from the wellbore. When it is desired to retrieve the gauge assembly from the bottom of the wellbore, a retrieving assembly is lowered into the wellbore by either wireline or sandline, the retrieving assembly connecting to the gauge assembly. The gauge assembly is pulled uphole to the well surface and the pressure measurement records are read and further recorded.
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