Method and system for predicting performance of a drilling system for a given formation
First Claim
1. An apparatus for controlling a drilling system having an automatic drilling mode comprising:
- a first input device for receiving data representative of a geology characteristic of a formation per unit depth, the geology characteristic including at least rock strength;
a second input device for receiving data representative of specifications of proposed drilling equipment of the drilling system for use in drilling of a well bore in the formation, the specifications including at least a specification of a drill bit;
a measurement device processor operatively connected to said first and second input devices;
the processor operable to determine predicted drilling mechanics in response to the specifications data of the proposed drilling equipment as a function of the geology characteristic data per unit depth according to a drilling mechanics model and outputting data representative of the predicted drilling mechanics, the predicted drilling mechanics including at least one selected from the group consisting of bit wear, mechanical efficiency, power, and operating parameters;
a computer controller operable to provide drilling operation control signals responsive to the predicted drilling mechanics data to control a parameter in drilling of the well bore with the drilling system, the parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics;
the measurement device processor operable for outputting control parameter data responsive to the predicted drilling mechanics data;
the control parameter data adaptable for use in recommended controlling of a control parameter in drilling of the well bore with the drilling system in the automatic drilling node; and
the control parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics.
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Abstract
A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.
209 Citations
35 Claims
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1. An apparatus for controlling a drilling system having an automatic drilling mode comprising:
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a first input device for receiving data representative of a geology characteristic of a formation per unit depth, the geology characteristic including at least rock strength; a second input device for receiving data representative of specifications of proposed drilling equipment of the drilling system for use in drilling of a well bore in the formation, the specifications including at least a specification of a drill bit; a measurement device processor operatively connected to said first and second input devices; the processor operable to determine predicted drilling mechanics in response to the specifications data of the proposed drilling equipment as a function of the geology characteristic data per unit depth according to a drilling mechanics model and outputting data representative of the predicted drilling mechanics, the predicted drilling mechanics including at least one selected from the group consisting of bit wear, mechanical efficiency, power, and operating parameters; a computer controller operable to provide drilling operation control signals responsive to the predicted drilling mechanics data to control a parameter in drilling of the well bore with the drilling system, the parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics; the measurement device processor operable for outputting control parameter data responsive to the predicted drilling mechanics data; the control parameter data adaptable for use in recommended controlling of a control parameter in drilling of the well bore with the drilling system in the automatic drilling node; and the control parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for controlling a drilling system comprising:
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receiving data representative of a geology characteristic of a formation per unit depth, the geology characteristic including at least rock strength; receiving data representative of specifications of proposed drilling equipment of the drilling system for use in drilling a well bore in the formation, the specifications including at least a specification of a drill bit; determining a predicted drilling mechanics in response to the specifications data of the proposed drilling equipment as a function of the geology characteristic data per unit depth according to a drilling mechanics model and outputting data representative of the predicted drilling mechanics, the predicted drilling mechanics including at least one selected from the group consisting of bit wear, mechanical efficiency, power, and operating parameters; controlling automatically a parameter in a drilling of the well bore with the drilling system in response to the predicted drilling mechanics data, the parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics; selecting at least one characteristic from the group consisting of rock strength, log data, lithology, porosity, and shale plasticity; selecting at least one proposed drilling equipment specification from the group consisting of a drill bit, drill string, down hole motor, top drive motor, rotary table assembly, mud system, and mud pump; and selecting at least one operating parameter from the group consisting of weight-on-bit, rotary revolutions-per-minute, cost, rate of penetration, and torque. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A computer program stored on a computer-readable medium for execution by a computer for controlling a drilling system, said computer program comprising:
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instructions for receiving data representative of a geology characteristic of a formation per unit depth, the geology characteristic including at least rock strength; instructions for receiving data representative of specifications of proposed drilling equipment for use in drilling of a well bore in the formation, the specifications including at least a specification of a drill bit; instructions for determining a predicted drilling mechanics in response to the specifications data of the proposed drilling equipment as a function of the geology characteristic per unit depth according to a drilling mechanics model and outputting data representative of the predicted drilling mechanics, the predicted drilling mechanics including at least one selected from the group consisting of bit wear, mechanical efficiency, power, and operating parameters; and instructions for determining a control parameter data in response to the predicted drilling mechanics data, the control parameter data being adaptable for use in a recommended automatic control of a control parameter in drilling of the well bore with the drilling system, the control parameter including at least one selected from the group consisting of weight-on-bit, rpm, pump flow rate, and hydraulics. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification