Method and apparatus to adjust weight-on-bit/torque-on-bit sensor bias
AssigneeBaker Hughes Incorporated
InventorsTu Tien Trinh, Eric Sullivan
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Abstract
Apparatuses and methods for adjusting weight-on-bit/torque-on-bit sensor bias in a drill bit. The apparatus may include a bit adjustment device disposed at least partially in a cavity in a bit shank. The bit adjustment device includes electronics and sensors for estimating a weight-on-bit/torque-on-bit bias. The method includes adjusting the weight-on-bit/torque-on-bit sensor bias of a drill bit. The method may include adjusting force on a bit adjustment device to adjust weight-on-bit/torque-on-bit sensor bias. The method may also include securing the bit adjustment device within the cavity of the bit shank after the desired weight-on-bit/torque-on-bit sensor bias has been achieved.
Claims14
An apparatus for adjusting sensor bias, comprising:
- a sensor body comprising:
- an upper portion configured to be operatively coupled with a bias adjustment device,
- a lower portion configured to be attached to a bit shank, and
- a sensing portion disposed between the lower portion and the upper portion, wherein the sensing portion includes at least one load cell, the load cell configured to indicate a magnitude of a force on the bit shank.
A method for adjusting sensor bias, comprising:
- disposing a sensor within a cavity in a bit shank;
- operatively coupling a bias adjustment device to the sensor;
- applying a plurality of force inputs to the sensor;
- and
- selecting the force input of the plurality of force inputs where the sensor indicates a desired bias.
A method for adjusting sensor bias, comprising:
- selecting a force input to a sensor that causes the sensor to indicate a desired bias, the sensor disposed within a cavity in a bit shank and at least partially surrounded by a securing member, wherein the force input is one of a plurality of force inputs applied to the sensor by a bias adjustment device.
Dependencies are inferred from the claim text.