发明名称 TILTED DRIVE SUB
摘要 <p>A tilted drive sub is disclosed with a center line of the internal diameter (ID) offset at an angle from the center line of the outer diameter (OD) starting at a point near to a top end of the tilted drive sub. This results in the ID being at an angle to the OD, with the OD of the tilted drive sub remaining straight. The offset ID has the same threads of a mud motor without a tilted drive sub. The tilted drive sub replaces the outer bearing housing of a normal performance mud motor.</p>
申请公布号 EP2321488(A1) 申请公布日期 2011.05.18
申请号 EP20090800673 申请日期 2009.07.22
申请人 HUNTING ENERGY SERVICES (DRILLING TOOLS), INC. 发明人 BLAIR, PARIS, E.;FICKEN, JOSEPH, L.
分类号 E21B7/04;E21B7/08;E21B15/04 主分类号 E21B7/04
代理机构 代理人
主权项
地址