发明名称 |
METHOD OF DISCONNECTING A DRILL STRING AT A DRILL RIG |
摘要 |
Method and apparatus for disconnecting an end rod (115) from a drill string (100) coupled together by a threaded connection (604, 605). Rod handling apparatus (102) comprises a gripper unit (106) having a 'floating'sled (206) with a sensor unit (208) configured to monitor relative axial position of the sled relative to a frame (205) of the gripper unit to determine a decoupling of the threaded connection and a separation of an end rod from the drill string. |
申请公布号 |
CA2911679(A1) |
申请公布日期 |
2014.11.20 |
申请号 |
CA20142911679 |
申请日期 |
2014.04.09 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
LARSSON, LARS-ERIK;JELGERT, JOHAN;VILEN, PER;EVERMARK, KENT |
分类号 |
E21B7/02;E21B19/15;E21B19/16;E21B19/20;E21B19/24 |
主分类号 |
E21B7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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