| 摘要 |
Fluid wells, particularly oil wells, exert heavy shock loads on the string of sucker rods extending down to the fluid pump located adjacent to the producing formation. A conventional rocker arm must lift the sucker rods the column of oil in the casing plus the weight of the fluid pump, overcome the inertial load and then come to a stop before reversing the stroke. The employment of linear induction motors to reciprocate the oil well rocker arm and then operate as a generator on the reverse stroke reduces the shock loading and the returns the generated electrical energy to the well pumping system. The instant invention greatly reduces the maintenance costs of a conventional oil well and provides greater efficiency of the well pumping system. |
