| 摘要 |
<p>A test tool including a locking device and a sleeve valve with a recording instrument attached, for use in testing wells as for the purpose of gathering data for reservoir evaluation, the test tool is installed in a landing receptacle in a well and, preferably near the reservoir to be evaluated, the test tool being run into the well on a conventional wireline tool string and an operating tool and locked and sealed in the landing nipple. The sleeve valve of the test tool is left open during running and is generally left open for a period during which the well is flowed, after which the valve is then closed by a pull on the wire line attached to the operating tool and left closed to allow pressure to build up below the test tool. Slacking the wire line causes the test tool to open. The test tool can be cycled between open and closed positions as many times as desired. When the last cycle has been performed, the valve is closed and the operating tool is retrieved from the well. A second trip with the wireline tools is necessary to retrieve the test tool. Well test systems utilizing such test tools are also disclosed. After retrieving the test tool from the well, the recorded data are obtained from the instrument. A reverse acting valve for the test tool is also disclosed.</p> |
