发明名称 |
Non-rotating plug set |
摘要 |
The plug set of the present invention comprises an upper plug having a non-rotation insert retained therein and a lower plug having two non-rotation inserts retained therein. The present invention further includes the use of a non-rotation insert in the floating equipment with which the plug set of the present invention is used.
|
申请公布号 |
US4858687(A) |
申请公布日期 |
1989.08.22 |
申请号 |
US19880266413 |
申请日期 |
1988.11.02 |
申请人 |
HALLIBURTON COMPANY |
发明人 |
WATSON, BROCK W.;FREEMAN, T. AUSTIN |
分类号 |
E21B29/00;E21B33/12;E21B33/16 |
主分类号 |
E21B29/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|