公开(公告)号：WO2016112385A1

公开(公告)日：2016-07-14

申请号：PCT/US2016/012866

申请日：2016-01-11

Applicant: WEATHERFORD TECHNOLOGY HOLDINGS, LLC

Inventor： ROBISON, Clark E. ,  THOMAS, Benson ,  LANE, William C. ,  YAKIMCHUK, Darius John ,  LEMBCKE, Jeffrey John ,  PAULET, Bryan A. ,  CAIN, Brandon M. ,  CHRISTIAN, Sean M. ,  SMITH, Paul L.

IPC: E21B43/12 ,  F04B47/02 ,  F04B47/14

CPC classification number: E21B43/126 ,  F04B17/03 ,  F04B17/05 ,  F04B47/02 ,  F04B47/14 ,  F16F15/023 ,  F16F15/027 ,  F16F15/03

Abstract: A sucker rod lifting system generally includes a surface drive mechanism, a sucker rod string, and a downhole pump. One such surface drive mechanism is known as a long-stroke pumping unit. The long-stroke pumping unit includes a counterweight which travels along a tower during operation thereof. Should the sucker rod string fail, there is a potential that the counterweight assembly will free fall and damage various parts of the pumping unit as it crashes under the force of gravity. The sudden acceleration of the counterweight assembly may not be controllable using the existing long-stroke pumping unit. The present disclosure generally relates to a braking system or an arrestor system for the counterweight assembly of a long-stroke pumping unit.

Abstract translation: 抽油杆提升系统通常包括表面驱动机构，抽油杆柱和井下泵。 一种这样的表面驱动机构被称为长行程抽吸单元。 长行程泵送单元包括在其操作期间沿着塔架行进的配重。 如果抽油杆杆失效，则当重力作用下碰撞时，配重组件会自由下落并损坏泵送单元的各个部件。 配重组件的突然加速可能不能使用现有的长行程泵送单元来控制。 本公开总体上涉及用于长行程泵送单元的配重组件的制动系统或避雷器系统。