公开(公告)号：US20140079560A1

公开(公告)日：2014-03-20

申请号：US14023229

申请日：2013-09-10

申请人： Chris Hodges ,  Tim Hankerd ,  Lance Mehegan ,  Nathan Terry ,  Walter Phillips

发明人： Chris Hodges ,  Tim Hankerd ,  Lance Mehegan ,  Nathan Terry ,  Walter Phillips

IPC分类号： F04B17/05

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： 提供液压油井泵送系统。 该系统使用泵对井筒上的往复活塞施加液压。 活塞连接到杆柱和井下泵，用于从井筒泵送油。 该系统包括电子控制系统，其通过在（i）“上行”状态之间循环液压系统来控制活塞在上下杆位置之间的运动，其中泵将油通过油管泵送到液压 气缸以将活塞移动到其上杆位置，以及（ii）“中性”状态，其中泵不再将油泵送到液压缸中，而是允许油响应于重力下降而返回通过油管线 活塞。 控制系统被编程为基于气缸中的液压油的体积计算而循环，而不参考沿着井口的位置传感器。 井口条件或液压缸在井筒内的放置可能会禁止在井口处连接物理传感器。 本文还提供了使用这种系统从井眼泵送油的方法。