公开(公告)号：US20110083859A1

公开(公告)日：2011-04-14

申请号：US12575999

申请日：2009-10-08

申请人： Joseph D. Scranton ,  Kamil Iftikhar ,  Colin Longfield

发明人： Joseph D. Scranton ,  Kamil Iftikhar ,  Colin Longfield

IPC分类号： E21B34/10 ,  E21B34/00

CPC分类号： E21B34/06 ,  E21B34/10

摘要： A tool that is usable with a well includes a valve element, a mechanical operator, a pressure chamber and a regulator. The valve element has a first state and a second state. The mechanical operator responds to a predetermined signature in an annulus pressure relative to a baseline level of the annulus pressure to transition the valve element from the first state to the second state. The pressure chamber exerts a chamber pressure to bias the mechanical operator to transition from the second state to the first state. The baseline level is capable of varying over time, and the regulator regulates the chamber pressure based on the baseline level.

摘要翻译： 可用于井的工具包括阀元件，机械操作器，压力室和调节器。 阀元件具有第一状态和第二状态。 机械操作者响应相对于环形空间压力的基准水平的环空压力的预定签名，以将阀元件从第一状态转换到第二状态。 压力室施加腔室压力以偏压机械操作者从第二状态转换到第一状态。 基线水平能够随时间变化，并且调节器基于基线水平来调节室压力。