| 摘要 |
A method for operating a progressive cavity pump in a borehole comprising mounting a stator to a tubing string and inserting the stator and tubing string into a borehole wherein the stator has at least first and second active stator sections that are at different locations on the stator, then performing a first operating phase involving inserting a first rotor into the tubing string until the first rotor is located at a selected downhole position, wherein the first rotor has a first active rotor section that is aligned with the first active stator section when the first rotor is in the selected downhole position, and rotating the first rotor relative to the stator such that the aligned first active rotor and stator sections generate a pumping force. The method also comprises a second operating phase involving removing the first rotor from the borehole, and inserting a second rotor into the tubing string until the second rotor is located at a selected downhole position, wherein the second rotor has a second active rotor section that is aligned with the second active stator section when the second rotor is in the selected downhole location, and rotating the second rotor relative to the stator such that the aligned second active rotor and stator sections generate a pumping force. |
