Semi-tubular double cavity rod pump extraction technology

Recently, the 5-inch half-tube double-cavity rod pump extraction technology independently developed by scientific research personnel of Shengli Oil Production Research Institute has been successfully applied to the wells of piles 1-22, which is the second successful application after the Well 84-Ping 2 Wells indicate that the technology is becoming mature and will enter the stage of scale promotion.

With the continuous development of Shengli Oilfield, nearly 1,000 5-inch half-casing oil wells have entered the high water cut development stage in the integral and fault block reservoirs represented by Jidong, Gudao, Shengtuo and Zhuangxi oil fields. The main problem they face is that they need to increase the amount of liquid discharged, but they are also limited by the smaller diameter casing restrictions and are powerless. Although the electric submersible pump lift can meet the requirements of large displacement pumping, it has high input costs and large pumping energy consumption.

In response to this problem, the scientific research personnel of the Institute of Mining Machinery have devoted themselves to the research and development and have independently developed a 5-inch half-casing oil well double chamber parallel rod pump extraction technology. This technology utilizes a double-pump parallel structure with a rod pump. Under the auxiliary pump, the technology of anti-bending, optimization of process parameters, and anti-corrosion and anti-offset grinding techniques are applied. It can not only increase the discharge volume without increasing the outer diameter of the pump and the low stroke times. , And can replace the vast majority of electric pump production, to achieve energy-saving production.

Compared with conventional pumps, the new pump can discharge more than 200 cubic meters/day in a 5-inch half-pipe. This technology achieves large-displacement lifting of the rod pump within the small casing, which at least gives rise to the “upgrading” of the production of 1000 small casing wells in Shengli Oilfield.