Drill stem testing with tubing conveyed perforation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 29, 1994
Grant Date -
N/A
app pub date -
Jan 23, 1992
filing date -
Jan 23, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A well test string includes an annulus pressure responsive tester valve and a tubing conveyed perforating gun including a tubing pressure actuated time delay firing mechanism. A compression set packer is disposed in the test string between the tester valve and the perforating gun. The packer includes a bypass valve for communicating the well below the packer with the tubing bore. The bypass valve is operably associated with the packer so that the bypass valve is open prior to setting the packer and so that the bypass valve is closed as the packer is set. The compression set packer also includes a one-way equalizer valve for allowing one-way fluid flow from the well below the packer to the tubing bore. The equalizer valve is operably associated with a bypass valve so that the equalizer valve is inoperable when the bypass valve is open, and so that the equalizer valve is operable when the bypass valve is closed.
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