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经营范围
发明名称
UNIVERSAL JOINT
摘要
A universal joint for use in a downhole drill string includes a planetary gear to convert eccentric rotation in the drill string to axial rotation.
申请公布号
CA2934331(A1)
申请公布日期
2017.01.24
申请号
CA20162934331
申请日期
2016.06.29
申请人
ULTERRA DRILLING TECHNOLOGIES, L.P.
发明人
MAW, JASON;ST. PIERRE, BEAU J.;CASAD, CHRISTOPHER M.
分类号
E21B17/05;F16D3/16
主分类号
E21B17/05
代理机构
代理人
主权项
地址
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