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在低丰度、低渗透、低产量油田的小井眼井上采用无油管抽油泵或无油管螺杆泵采油系统 ,普遍达不到设计要求 ,新开发的小井眼无油管空心抽油泵采油系统的应用有效地解决了这些技术难题。该系统的地面部分仍采用常规的地面驱动设备 ,井下部分则采用空心抽油泵取代常规的管式抽油泵 ,以套管与空心抽油杆之间的环形空间作为出液通道 ,利用空心抽油杆内腔以及空心泵的中间通道测试井下参数 ,出液通道也可作为油井清蜡和加药的通道。由于省去了油管柱 ,可降低设备与维修总投资的 2 0 %～ 3 0 %。
In the low-abundance, low-permeability, low-yielding oil wells in the slim hole wells using oil-free pipe pump or oil-free pipe screw pump oil production system generally failed to meet the design requirements, the newly developed slim borehole oil pipe hollow pumping system is effective Solve these technical problems. The ground part of the system is still using conventional ground-driven equipment, the underground part of the hollow pumping pump instead of the conventional tubular pump, hollow casing and hollow rod between the annular space as a liquid passage, the use of hollow pumping Rod cavity and the hollow channel of the middle of the channel test parameters of the well, the liquid channel can also be used as the well of wax and dosing channels. Due to the omission of tubing strings, 20% ~ 30% of the total investment in equipment and maintenance can be reduced.