Invention Grant
- Patent Title: Method of disconnecting a drill string at a drill rig
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Application No.: US14891602Application Date: 2014-04-09
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Publication No.: US10167688B2Publication Date: 2019-01-01
- Inventor: Johan Jelgert , Lars-Erik Larsson , Per Vilen , Kent Evermark
- Applicant: SANDVIK INTELLECTUAL PROPERTY AB
- Applicant Address: SE Sandviken
- Assignee: SANDVIK INTELLECTIAL PROPERTY AB
- Current Assignee: SANDVIK INTELLECTIAL PROPERTY AB
- Current Assignee Address: SE Sandviken
- Agent Corinne R. Gorski
- Priority: EP13168189 20130517
- International Application: PCT/EP2014/057157 WO 20140409
- International Announcement: WO2014/183931 WO 20141120
- Main IPC: E21B19/16
- IPC: E21B19/16 ; E21B19/10 ; E21B19/07 ; E21B19/20 ; E21B3/02 ; E21B7/04 ; E21B17/00 ; B25B17/00 ; E21B19/08 ; E21B7/02
Abstract:
A method and apparatus for disconnecting an end rod from a drill string coupled together by a threaded connection is provided. A rod handling apparatus includes a gripper unit having a floating sled with a sensor unit configured to monitor relative axial position of the sled relative to a frame of the gripper unit to determine a decoupling of the threaded connection and a separation of an end rod from the drill string.
Public/Granted literature
- US20160097245A1 METHOD OF DISCONNECTING A DRILL STRING AT A DRILL RIG Public/Granted day:2016-04-07
Information query
