Method of and system for optimizing rate of penetration in drilling operations
AssigneeNoble Drilling Services Inc.
InventorsCharles H. King, Mitchell D. Pinckard
Life of this patent
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Abstract
A method of and system for optimizing bit rate of penetration while drilling substantially continuously determine an optimum weight on bit necessary to achieve an optimum bit rate of penetration based upon measured conditions and maintains weight on bit at the optimum weight on bit. As measured conditions change while drilling, the method updates the determination of optimum weight on bit.
Claims27
A method of optimizing bit rate of penetration while drilling, which comprises the steps of:
- substantially continuously determining an optimum drilling control variable value to achieve an optimum bit rate of penetration;
- and
- maintaining said drilling control variable at said optimum drilling control variable value.
A method of optimizing bit rate of penetration in drilling operations, which comprises the steps of:
- substantially continuously determining bit rate of penetration as function of a drilling control variable value for a set of conditions;
- periodically, while drilling, calculating a target drilling control variable value to produce a desired bit rate of penetration for said set of conditions;
- and,
- maintaining a current drilling control variable value equal to said target drilling control variable value during drilling.
A method of optimizing bit rate of penetration in drilling operations, which comprises the steps of:
- (a) substantially continuously determining weight on bit and bit rate of penetration;
- (b) periodically, while drilling, determining an optimum weight on bit to achieve said optimum rate of penetration.
A drilling system, which comprises:
- means for displaying current weight on bit;
- means for displaying a target bit weight;
- and,
- means for controlling weight on bit so that a driller can attempt to match said displayed current bit weight to said target bit weight.
A drilling system, which comprises:
- means for substantially continuously determining current weight on bit while drilling;
- means for substantially continuously determining current bit rate of penetration while drilling;
- and
- means for periodically determining a target weight on bit while drilling.
A drilling method, which comprises the steps of:
- substantially continuously determining current weight on bit while drilling;
- substantially continuously determining current bit rate of penetration while drilling;
- and
- periodically determining a target weight on bit while drilling based upon determined weights on bit and bit rates of penetration.
Dependencies are inferred from the claim text.