发明名称 Cementing swivel and retainer arm assembly and method
摘要 A cementing swivel includes an outer stationary member having a cement port, an inner rotating member with a bore therethrough, and a torque indicating member coupled to the outer stationary member and configured to provide a visual indication that a predetermined torque load has been reached.
申请公布号 US8491013(B2) 申请公布日期 2013.07.23
申请号 US20070854283 申请日期 2007.09.12
申请人 PEER RICHARD D.;COSTO, JR. ROBERT J.;SMITH INTERNATIONAL, INC. 发明人 PEER RICHARD D.;COSTO, JR. ROBERT J.
分类号 E21B33/05;F16L27/00 主分类号 E21B33/05
代理机构 代理人
主权项
地址