Development and application of new surface jar;
一种新型地面震击器的开发与应用
The common surface jar cannot realize the normal resetting due to small hook weight in the shallow well below 3000 m.
针对某些3000m以内的浅井,因大钩悬重小,采用常规地面震击器无法实现正常复位的问题,研制了一种新型地面震击器。
