Ultra deep low leakage plunger oil pump

Many oil fields in our country have entered the mid to late stage of development, and the formation pressure has decreased, resulting in many oil fields having to adopt small pump deep pumping technology. But as the pump hanging deepens, the working environment of the oil well pump becomes even worse. Under the action of high pressure difference between the inside and outside of the pump barrel (some oil well pump barrels have a pressure difference of nearly 20MPa or even higher), the pump barrel will expand and deform, causing the actual leakage of the oil well pump during operation to exceed the theoretical leakage, and an increase in leakage will reduce pump efficiency. The series of ultra deep low leakage plunger pumps developed by our company can achieve zero internal and external pressure difference in the pump barrel during operation, greatly improving the working environment of the oil well pump and reducing actual leakage.

Structural characteristics

The pump is equipped with a load-bearing outer pipe on the basis of a regular full cylinder pump, with the bottom of the pump cylinder fixed to the outer pipe and the upper end suspended. When the oil pump is working, the annular space between the pump barrel and the outer pipe will be filled with oil, and the pressure difference between the inside and outside will be balanced, greatly improving the working environment of the pump barrel.

a、 The pressure difference between the inside and outside of the pump barrel is zero, and the pump barrel will no longer expand or deform under stress. Reduced leakage and improved pump efficiency.

b、 Reduced the probability of complete pump failure caused by deformation of pump components under stress.

c、 The structure is simple, and the homework process will not increase the workload.

d、 Improving the depth of the oil pump into the well is particularly suitable for the exploitation of ultra deep wells.

Main technical parameters