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公开(公告)号：US06550538B1
公开(公告)日：2003-04-22
申请号：US09717979
申请日：2000-11-21
IPC分类号： E21B4300
CPC分类号： E21B47/18
摘要： A system that is usable with a subterranean well includes a downhole assembly and an apparatus. The downhole assembly is adapted to respond to a command that is encoded in a stimulus that is communicated downhole. The apparatus is adapted to change a pressure of a gas in communication with the well to generate the stimulus.
摘要翻译： 可与地下井一起使用的系统包括井下组件和装置。 井下组件适于响应于在井下传达的刺激中编码的命令。 该装置适于改变与井相连通的气体的压力以产生刺激。
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公开(公告)号：US5010958A
公开(公告)日：1991-04-30
申请号：US533624
申请日：1990-06-05
申请人： Dale E. Meek , Merlin D. Hansen
发明人： Dale E. Meek , Merlin D. Hansen
IPC分类号： E21B33/126 , E21B33/128 , E21B33/129 , E21B33/134
CPC分类号： E21B33/134 , E21B33/126 , E21B33/1265 , E21B33/128 , E21B33/1292
摘要： A bridge plug for sealing a well casing comprises a plurality of cups which tightly interfit together when a compressive load is applied to both opposite ends of the plurality of cups. Application of the compressive load to both opposite ends of the cups forces a first cup to fit into a second cup, the second cup to fit into a third cup, and the third cup to fit into a fourth cup, etc., thereby producing a single unitary plug which includes a plurality of tightly interfit cups. Further application of the compressive load to both opposite ends causes transverse expansion of the plurality of interfit cups to occur. When the cups contact the well casing wall, a permanent seal is achieved between the cups and the well casing wall. Anchor elements on both sides of the cups contact the well casing wall and permanently hold the interfitting cups in their compressed condition.
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公开(公告)号：US06389890B1
公开(公告)日：2002-05-21
申请号：US09663372
申请日：2000-09-12
IPC分类号： E21B4400
CPC分类号： E21B23/14
摘要： A hydraulic strain sensor for use with a downhole tool includes a housing having two chambers with a pressure differential between the two chambers. A mandrel is disposed in the housing. The mandrel is adapted to be coupled to the tool such that the weight of the tool is supported by the pressure differential between the two chambers. A pressure-responsive sensor in communication with the one of the chambers is provided to sense pressure changes in the chamber as the tool is accelerated or decelerated and to generate signals representative of the pressure changes.
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公开(公告)号：US06550322B2
公开(公告)日：2003-04-22
申请号：US10091200
申请日：2002-03-05
IPC分类号： E21B4400
CPC分类号： E21B23/14
摘要： A hydraulic strain sensor for use with a downhole tool includes a housing having two chambers with a pressure differential between the two chambers. A mandrel is disposed in the housing. The mandrel is adapted to be coupled to the tool such that the weight of the tool is supported by the pressure differential between the two chambers. A pressure-responsive sensor in communication with the one of the chambers is provided to sense pressure changes in the chamber as the tool is accelerated or decelerated and to generate signals representative of the pressure changes.
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