Drill stem testing with tubing conveyed perforation.

摘要

A well test string (148) includes an annulus pressure responsive tester valve (160) and a tubing conveyed perforating gun (172) including a tubing pressure actuated time delay firing mechanism (170). A compression set packer (10A) is disposed in the test string between the tester valve (160) and the perforating gun (172). The packer includes a bypass valve (90) for communicating the well (178) below the packer with the tubing bore (158). The bypass valve (90) is operably associated with the packer (10A) 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 (10A) also includes a one-way equalizer valve (92) for allowing one-way fluid flow from the well (178) below the packer to the tubing bore (158). The equalizer valve (92) is operably associated with the bypass valve (90) 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. <IMAGE>