| 摘要 |
<p>Well testing apparatus for running on a single-conductor electric cable for gathering reservoir information, the apparatus utilizing two pressure gages and a valve, the valve being landable in a downhole receptacle and being operable to shut in the well or to open it for flow by tensioning or relaxing the electric cable, one of the gages sensing well pressures below the valve and the other gage sensing pressures above the valve, both pressure gages sending signals to the surface corresponding to the pressures sensed thereby both while the well is shut in and while it is flowing, the pressure signals being processed by surface readout equipment for real-time display, recording and/or printout, the apparatus including, if desired, a temperature sensor which sends appropriate signals to the surface which not only indicate the well temperatures sensed but the temperatures are used by a computer and its software to automatically correct the pressure readings for temperature affects. Well testing methods are disclosed as are, also, electronic toggling and sequencing devices for use in downhole test tools for switching power from instrument to instrument in the test tool string in predetermined sequence in order to receive signals from each such instrument in turn.</p> |
