Method for determining preferred drill bit design parameters and drilling parameters using a trained artificial neural network, and methods for training the artificial neural network
First Claim
1. A method for selecting a design parameter for a drill bit, comprising:
- entering a value of at least one property of an earth formation to be drilled by said bit into a trained neural network, said neural network trained by selecting data from drilled wellbores, said data comprising values of said at least one formation property for formations through which said drilled wellbores penetrated, and corresponding thereto values of at least one drilling operating parameter, said drill bit design parameter, and values of a rate of penetration and a rate of wear of a drill bit used on each said formation;
entering said data from said wellbores into said neural network; and
selecting said design parameter based on output of said trained neural network.
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Abstract
A method for selecting a design parameter for a drill bit is disclosed. The method includes entering a value of at least one property of an earth formation to be drilled into a trained neural network. The neural network is trained by selecting data from drilled wellbores. The data comprise values of the formation property for formations through which the drilled wellbores have penetrated. Corresponding to the values of formation property are values of at least one drilling operating parameter, the drill bit design parameter, and values of a rate of penetration and a rate of wear of a drill bit used on each of the formations. Data from the wellbores are entered into the neural network to train it, and the design parameter is then selected based on output of the trained neural network.
218 Citations
37 Claims
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1. A method for selecting a design parameter for a drill bit, comprising:
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entering a value of at least one property of an earth formation to be drilled by said bit into a trained neural network, said neural network trained by selecting data from drilled wellbores, said data comprising values of said at least one formation property for formations through which said drilled wellbores penetrated, and corresponding thereto values of at least one drilling operating parameter, said drill bit design parameter, and values of a rate of penetration and a rate of wear of a drill bit used on each said formation;
entering said data from said wellbores into said neural network; and
selecting said design parameter based on output of said trained neural network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
entering said data from said wellbores into said neural network.
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8. A method for optimizing an economic performance of a drill bit, comprising:
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entering a value of at least one property of an earth formation to be drilled by said bit into a trained neural network;
entering at least one design parameter of said drill bit into said trained neural network; and
adjusting a value of at least one drilling operating parameter in response to output of said trained neural network so as to optimize a value of a parameter related to said economic performance of said bit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
entering said data from said wellbores into said neural network.
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19. The method as defined in claim 8 further comprising determining said value of said at least one formation property during drilling of a wellbore, and adjusting said value of said at least one drilling operating parameter in response to changes in said value of said at least one formation property, said value of said at least one formation property determined during drilling by entering values of said at least one formation property with respect to depth from nearby wellbores into said neural network so as to train said neural network to calculate expected values of said at least one formation property in said wellbore being drilled at corresponding stratigraphic depths therein.
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20. The method as defined in claim 8 wherein said economic performance parameter comprises a cost to drill a selected portion of a wellbore.
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21. The method as defined in claim 8 wherein said economic performance parameter comprises a distance drilled by a single drill bit.
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22. The method as defined in claim 8 wherein said economic performance parameter comprises an amount of damage to a producing earth formation.
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23. The method as defined in claim 8 wherein said economic performance parameter comprises degree of departure from a planned wellbore trajectory.
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24. The method as defined in claim 8 further comprising changing said at least one drill bit design parameter in response to the output of said trained neural network so as to optimize said value of said parameter related to economic performance.
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25. A method for estimating change in economic performance of a drill bit in response to change in an input parameter, comprising:
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entering a value of at least one property of an earth formation to be drilled by said bit into a trained neural network;
entering at least one design parameter of said bit into said trained neural network;
entering at least one drilling operating condition into said trained neural network; and
varying at least one of said at least one property of said earth formation, said at least one design parameter and said at least one drilling operating condition and determining a change in a value of at least one parameter related to said economic performance of said bit. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
entering said data from said wellbores into said neural network.
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33. The method as defined in claim 25 wherein said economic performance parameter comprises cost to drill a selected portion of a wellbore.
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34. The method as defined in claim 25 wherein said economic performance parameter comprises a distance drilled by a single drill bit.
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35. The method as defined in claim 25 wherein said economic performance parameter comprises an amount of damage to a producing earth formation.
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36. The method as defined in claim 25 wherein said economic performance parameter comprises degree of departure from a planned wellbore trajectory.
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37. The method as defined in claim 25 further comprising changing said at least one drill bit design parameter in response to the output of said trained neural network so as to optimize said value of said parameter related to economic performance.
Specification