发明名称 |
Multi-Sectional Percussive Drill Bit Assembly |
摘要 |
A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket structure and axially limited in travel by means of retaining members.
|
申请公布号 |
US2006278433(A1) |
申请公布日期 |
2006.12.14 |
申请号 |
US20060422625 |
申请日期 |
2006.06.07 |
申请人 |
KEYSTONE DRILL SERVICES, INC. |
发明人 |
WALKER THOMAS A.;SMITH RICHARD K.JR.;MEANS STEPHEN R. |
分类号 |
E21B10/36 |
主分类号 |
E21B10/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|