Apparatus and method for tool face control using pressure data
AssigneeBaker Hughes Incorporated
InventorThorsten Schwefe
Life of this patent
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Abstract
A method, apparatus and computer-readable medium for drilling a wellbore is disclosed. A fluid is pumped to rotate a drilling assembly at an end of a drill string in the wellbore. A plurality of measurements of pressure of the fluid is obtained. A standard deviation of the mud pressure is estimated from the plurality of fluid pressure measurements, and a variation of a tool face angle of the drilling assembly to the pumped fluid is estimated from a comparison of the estimated standard deviation of pressure to a selected criterion. A drilling parameter can be altered to drill the wellbore based on the estimated variation of the tool face angle.
Claims20
A method of drilling a wellbore, comprising:
- supplying a fluid to a drilling assembly in the wellbore;
- obtaining a plurality of measurements of fluid pressure of the supplied fluid;
- estimating a standard deviation of the fluid pressure from the plurality of the measurements of the fluid pressure;
- estimating a variation of a tool face angle of the drilling assembly using the estimated standard deviation of the fluid pressure;
- and
- altering a drilling parameter based on the estimated variation of the tool face angle to drill the wellbore.
An apparatus for drilling a wellbore, comprising:
- a drilling assembly in the wellbore;
- a pressure sensor configured to obtain measurements of pressure of a fluid flowing through the drilling assembly;
- and
- a processor configured to:
- estimate a standard deviation of the pressure measurements of the fluid flowing through the drilling assembly,
- estimate a variation of a tool face angle of the drilling assembly from the estimated standard deviation, and
- alter a drilling parameter based on the estimated variation of the tool face angle to drill the wellbore.
A computer-readable medium having instructions stored therein which enable a processor having access to the instructions to perform a method of drilling a wellbore, the method comprising:
- receiving measurements of pressure of a fluid supplied to a drilling assembly deployed in the wellbore;
- estimating a standard deviation of the measurements of pressure;
- estimating a variation of a tool face angle of the drilling assembly from the estimated standard deviation of measurements of pressure;
- and
- altering a drilling parameter based on the estimated variation of the tool face angle of the drilling assembly to drill the wellbore.
A method of estimating a variation of a tool face angle of a drilling assembly in a wellbore, comprising:
- obtaining pressure measurements of a fluid flowing through the drilling assembly using a sensor;
- estimating a standard deviation of the pressure measurements, and
- estimating a variation of the tool face angle of the drilling assembly from the estimated standard deviation.
Dependencies are inferred from the claim text.