公开(公告)号：EP2895687A4

公开(公告)日：2016-06-22

申请号：EP13836940

申请日：2013-09-13

申请人： HYDRAULIC ROD PUMPS INTERNAT

发明人： HODGES CHRIS ,  MEHEGAN LANCE A ,  TERRY NATHAN J ,  HANKERD TIMOTHY L ,  PHILLIPS WALTER

IPC分类号： E21B43/12 ,  E21B43/16 ,  E21B47/008 ,  F04B47/02

CPC分类号： E21B43/121 ,  E21B43/126 ,  E21B43/129 ,  F04B17/05 ,  F04B19/22 ,  F04B23/02 ,  F04B47/026 ,  F04B47/04 ,  F04B49/002 ,  F04B49/22

摘要： A hydraulic oil well pumping system is provided. The system uses a pump to exert hydraulic pressure against a reciprocating piston over a wellbore. The piston is connected to a rod string and downhole pump for pumping oil from a wellbore. The system includes an electronic control system that controls movement of the piston as it moves between the upper and lower rod positions by cycling the hydraulic system between (i) an “upstroke” condition wherein the pump is pumping oil through the oil line into the hydraulic cylinder to move the piston to its upper rod position, and (ii) a “neutral” condition wherein the pump is no longer pumping oil into the hydraulic cylinder, but is allowing oil to flow back through the oil line in response to gravitational fall of the piston. The control system is programmed to cycle based upon a volumetric calculation of hydraulic oil in the cylinder without reference to position sensors along the wellhead. Wellhead conditions or placement of the hydraulic cylinder inside the wellbore may prohibit attaching physical sensors at the wellhead. A method for pumping oil from a wellbore using such a system is also provided herein.

摘要翻译： 一种液压油井泵送系统被提供。 该系统使用一个泵来施加液压抵抗往复运动的活塞在一个井孔中。 活塞连接至杆柱和用于从井筒抽油井下泵。 该系统包括在电子控制系统做了，因为它通过循环之间（i）所述的液压系统，以“上冲程”条件worin泵通过油管线泵送油到液压上下棒位置之间移动活塞的控制移动 气缸的活塞移动到其上杆的位置，和（ii）“中性”条件worin泵不再泵送油到液压缸，但允许油通过油管线响应流回的重力落下 活塞。 所述控制系统被编程以基于液压油的缸中的体积计算周期不参考沿着井口位置传感器。 井口条件或液压缸放置在井筒内可禁止在井口安装物理传感器。 一种用于从使用寻求系统因此在提供井筒泵送油的方法。