Packing type energy-saving oil production pump

Abstract

The invention relates to a packing type energy-saving oil production pump which comprises a pump cylinder, a hollow plunger and a packer. A fixed one-way valve is arranged at the bottom end of the pump cylinder. The packer is arranged in the pump cylinder and is fixedly connected with the pump cylinder. The hollow plunger is fixedly arranged at the bottom end of a hollow sucker rod in a sleeving manner, and the hollow sucker rod is inserted in the packer and is connected with the packer in a sliding manner. The hollow plunger is inserted in the pump cylinder and is connected with the pump cylinder in a sliding manner. A moving one-way valve is arranged in the hollow sucker rod. During work, an oil pumping unit upwards lifts the hollow sucker rod and drives the hollow plunger to synchronously move upwards, output liquid is sucked into a work cavity between the hollow plunger and the fixed one-way valve, the oil pumping unit only needs to provide power needed by the hollow plunger and the hollow sucker rod and does not need to provide power needed by sucking the output liquid, and therefore the great majority of energy is saved; and afterwards, the output liquid in the work cavity can be pumped into an oil pipe through through holes in the hollow plunger and the hollow sucker rod simply under the gravity of the sucker rod.

Description

technical field [0001] The invention relates to the technical field of oil pumping, in particular to a sealed energy-saving oil recovery pump. Background technique [0002] Traditional rod-type oil extraction pumps are generally used in oil extraction operations at the present stage. This pump has the characteristics of simple structure, convenient installation, and long service life. [0003] The traditional rod type oil production pump does work when it goes up, but does not do work when it goes down. That is, when the plunger goes up, the plunger directly sends the production fluid to the ground. For the work stroke, the force it has to overcome is the sum of the pressure of the production fluid on the plunger and the gravity of the sucker rod. The power of the pumping unit that needs to be equipped is relatively large. Large; when the plunger goes down, the production fluid is sent to the tubing, and the traditional rod well pump does not have the energy-saving function...

AI Technical Summary

Problems solved by technology

That is, when the plunger goes up, the plunger directly sends the production fluid to the ground. For the work stroke, the force it has to overcome is the sum of the pressure of the production fluid on the plunger and the gravity of the sucker rod. The power of the pumping unit that needs to be equipped is relatively large. Large; when the plunger goes down, the production fluid is sent to the tubing, and the traditional rod well pump does not have the energy-saving function because of the non-working stroke.

Images