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US 2026/0071537 A1Published application
Mitigating drill string hfto
AssigneeSchlumberger Technology Corporation
InventorsAshley Bernard Johnson, Riadh Boualleg, Ross Lowdon
Life of this patent
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Abstract
Wellbore operations include rotating a drill string in a wellbore. The drill string includes a rotary steerable system having at least three pads configured to contact the wellbore wall to steer a direction of drilling. The pads are simultaneously actuated while rotating the drill string to mitigate high frequency torsional oscillations.
Claims20
A wellbore operation comprises:
- rotating a drill string in a wellbore, the drill string including a rotary steerable system having at least three pads configured to contact the wellbore wall to steer a direction of drilling;
- measuring a high frequency torsional oscillation (HFTO) amplitude while rotating;
- comparing the measured HFTO amplitude with an HFTO threshold;
- and
- simultaneously actuating the at least three pads to mitigate HFTO oscillations when the measured HFTO amplitude exceeds the HFTO threshold.
2 more elements
A wellbore operation comprises:
- rotating a drill string in a wellbore, the drill string including a rotary steerable system having at least three pads configured to contact the wellbore wall to steer a direction of drilling;
- determining operational conditions or times during the wellbore operation at which the drill string is susceptible to high frequency torsional oscillations (HFTO);
- and
- simultaneously actuating the at least three pads to mitigate HFTO oscillations at the determined operational conditions or times when the drill string is susceptible to HFTO.
1 more element
A rotary steerable system comprising:
- a rotary steerable system body including at least three pads deployed therein and configured to contact a wellbore wall to steer a direction of drilling;
- a control unit including a processor and at least one sensor configured to measure a high frequency torsional oscillation (HFTO) amplitude;
- and
- wherein the processor is configured to cause the at least one sensor to measure the HFTO amplitude and simultaneously actuate the at least three pads to mitigate HFTO when the HFTO amplitude exceeds a corresponding threshold.
1 more element
Dependencies are inferred from the claim text.