"One-stop Multi-wells" Hydraulic Drainage Systems Coordinated Control And Simulation Technology Research

With the oil and gas exploration is becoming increasingly difficult, the wells of the major oil fields utilizing inclined shaft mining are increasing, Using conventional rod pumping equipment to inclined shaft mining expose a lot of problems, As the eccentric wear between oil bars and poles exist, it can not only cause the sucker rod broken off frequently and increase the amount of work and operating costs, but also easily lead to stop the pumps, which affect the production of crude oil in the production process. Although the major oil field has taken many anti-friction wear measures, it can not fundamentally solve the eccentric wear issues between oil bars and poles. In this industrial context, people began to seek new oil production equipment and technology, the rodless pumping device based on water-based power, which is designed by China Petroleum Engineering Design Co., Ltd is one of new oil extraction equipments. Water-based power rodless pumping device can largely overcome severe eccentric wear, high energy consumption and improve the efficiency of the pump. But because of its special structure, The ground drive system hydraulic station only do useful work in the upstroke of pumping, and do idle work in the downstroke (counterweight block weight, power cylinder and gravity making them down). In response to these problems, the subject carried out "one-stop multi-wells" hydraulic drainage systems coordinated control and simulation technology research, Which provide a method to drive multiple wells coordination at the same time through a ground the hydraulic station drive system.Based on the composition and specific process of the water-based power rodless pumping system, this article described the working principle of the "one-stop one well" hydraulic drainage and gas systems in detail, and then extended to the process principles of "one-stop multi-wells" hydraulic drainage and gas systems. Besides, the paper put forward the calculation method of two important parameters, which are the ground power fluid driving pressure and downhole counterweight. At the same time, combined with the engineering fluid mechanics, the article constructed stress analysis model of the underground moving parts in hydraulic drainage and gas systems, competing software flow charts of the ground power fluid driving pressure and downhole counterweight block calculation method, and developing a counterweight calculation templates Software. According to relevant process parameters provided by the oil field, we make multiple calculations for the ground power fluid driving pressure and downhole counterweight block. After analyzing the impact of various important parameters on the calculated results carefulness, we learned that the calculated results and the actual value are in good agreement.In addition, based on the process of "one-stop multi-wells" hydraulic drainage and gas systems, we built the coordination control model of "one-stop multi-wells" hydraulic mining systems and built simulation software experimental platform. We also put forward the "variable priority" and optimal valve coordination control algorithm. The software flow charts of priority reasoning algorithms and coordinated control algorithm were given, and the simulation software were developed. Finally, we accomplished simulation experiments using different process parameters in the different combinations, which include the number of the wells and the number of the maximum upstroke wells. The simulation results show that the effect of the coordinated control is perfect, which verify the feasibility of the "one-stop multi-wells" hydraulic mining system coordination control model and coordinated control algorithm.