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US 6,601,658 B1Granted
Control method for use with a steerable drilling system
AssigneeSchlumberger WCP LTD
InventorGeoff Downton
Life of this patent
Estimating the term…
Abstract
A control method for use with a steerable drilling system comprises the steps of inputting parametric model data representative of drilling conditions and using the data to determine achievable drilling directions.
Claims11
A method of controlling the operation of a steerable drilling system comprising:
- inputting parametric model data representative of drilling conditions;
- calculating build and turn gain, cross-coupling and bias values using the parametric model data;
- using the calculated build and turn gain, cross-coupling and bias values to derive build and turn responsiveness values;
- using the derived build and turn responsiveness values in controlling the operation of a steerable drilling system;
- wherein an output signal is produced which is used to control a display to provide an operator with information for use in controlling the operation of the drilling system and wherein the display is in graphic form of build rate response against turn rate response upon which is plotted an envelope indicating the achievable responses for one or more sets of operating conditions.
2 more elements
A method of controlling the operation of a steerable drilling system comprising the steps of:
- inputting parametric model data representative of drilling conditions;
- calculating build and turn gain, cross-coupling and bias values using the parametric model data;
- using the calculated build and turn gain, cross-coupling and bias values to derive build and turn responsiveness values;
- using the derived build and turn responsiveness values to calculate a range of achievable drilling directions.
1 more element
A method of controlling the operation of a steerable drilling system comprising:
- inputting parametric model data representative of drilling conditions;
- inputting data representative of a desired drilling direction;
- calculating build and turn gain, cross-coupling and bias values using the parametric model data;
- using the parametric model data and the data representative of the desired drilling direction to produce an output signal;
- and
- using the output signal to control a display to provide an operator with information in a graphic form for use in controlling the operation of the drilling system,
- wherein the display is in the form of a graph of build rate response against turn rate response upon which is plotted an envelope indicating achievable responses for one or more sets of operating conditions.
4 more elements
Dependencies are inferred from the claim text.