发明名称 |
Coring assembly for mounting on the end of a drill string |
摘要 |
There is provided a new and useful coring assembly for mounting on the end of a drill string and comprising a core barrel; abrading means on at least a part of the core barrel; a reaming collar mounted about a lower section of the core barrel and selectable between a first condition in which the collar is rotatable with the barrel and a second condition in which the collar is rotatable relative to and slidable longitudinally relative to the core barrel; a housing suspended from the core barrel; a deflection crank extending between the housing and the core barrel; and means within the housing for transferring power from a power source to the crank for selectively rotating the crank for moving the core barrel between a first position in which the core barrel and the housing are aligned and a second position in which the barrel and the housing are not aligned.
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申请公布号 |
US5103921(A) |
申请公布日期 |
1992.04.14 |
申请号 |
US19910666632 |
申请日期 |
1991.03.08 |
申请人 |
SIDETRACK CORING SYSTEMS INC. |
发明人 |
ZEER, ROBERT L.;MIHAI, ALEX |
分类号 |
E21B4/16;E21B7/06;E21B49/06 |
主分类号 |
E21B4/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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