发明名称 Sliding sleeve with ball guide
摘要 A downhole tool 10 comprises a body 20 having a passage 22 provided in the body and a sleeve member slidably mounted to the body such that the first sleeve member is movable between a first position in which the sleeve member extends from the body and a second position in which the sleeve member is substantially retracted into the fluid passage of the body. A guide means such as a second sleeve 50 is provided to guide an object such as a drop ball 200 traveling within the first downhole fluid passage to the sleeve member. A secondary fluid passage may be provided between the fluid passage and an outer surface of the body and the sleeve adapted to close the secondary passage when in either the first or second positions. Also disclosed is a downhole tool having retention means such as a shearing ring for maintaining a sliding sleeve in first or second positions.
申请公布号 GB2449662(A) 申请公布日期 2008.12.03
申请号 GB20070010276 申请日期 2007.05.30
申请人 HAMDEEN INCORPORATED LIMITED 发明人 RICHARD KEITH BOOTH
分类号 E21B34/14;E21B21/10;E21B34/06;E21B37/00;E21B41/00 主分类号 E21B34/14
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