发明名称 |
Shock isolation sub for use with downhole explosive actuated tools |
摘要 |
The present disclosure is directed to a shock absorbing device for threading in a tubing string for running delicate instruments into a well borehole where they are in near proximity to explosives which might otherwise be detonate. This particularly is important in a well borehole which is filled with a standing column of liquid which transmits the shock waves quite readily. This is a separate assembly which can be threaded in the tubing string and has a pin and box connection for that. Moreover, it is formed of an outer mandrel surrounding connected inner upper and inner lower mandrels; the inner mandrels define annular spaces for receiving shock absorbers defined by alternating thin layers of metal and rubber; the metal and rubber washers have different shock wave impedances and tend therefore to absorb shock waves traveling either upwardly or downwardly in the well borehole.
|
申请公布号 |
US5188191(A) |
申请公布日期 |
1993.02.23 |
申请号 |
US19910803881 |
申请日期 |
1991.12.09 |
申请人 |
HALLIBURTON LOGGING SERVICES, INC. |
发明人 |
TOMEK, MARTIN L. |
分类号 |
E21B17/07;E21B47/01;F16F1/40 |
主分类号 |
E21B17/07 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|