Well construction display
AssigneeSchlumberger Technology Corporation
InventorsShunfeng Zheng, Vishwanathan Parmeshwar
Life of this patent
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AssigneeSchlumberger Technology Corporation
InventorsShunfeng Zheng, Vishwanathan Parmeshwar
Estimating the term…
A method for steering a downhole tool in a wellbore includes measuring a tool face when the drill bit is off-bottom, measuring an angular position of a drill string when the drill bit is off-bottom, and measuring a torque on the drill string when the drill bit is off-bottom. Measuring the tool face when the drill bit is on-bottom and measuring the torque on the drill string when the drill bit is on-bottom. Determining a transfer function comprising the angular position of the quill, the difference between the tool face when the drill bit is on-bottom and off-bottom, and the difference between the torque when the drill bit is on-bottom and off-bottom. The angular position of the drill string is varied at the surface, based upon the transfer function, to reduce an angle between the tool face when the drill bit is on-bottom and a target tool face.
A method for steering a downhole tool in a wellbore, comprising:
A system for steering a downhole tool in a wellbore, comprising:
Dependencies are inferred from the claim text.