Methods for operating wellbore drilling equipment based on wellbore conditions
First Claim
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1. A method, comprising:
- acquiring annular pressure data from a wellbore, wherein the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period;
identifying at least first and second values from the annular pressure data;
comparing the variation between first and second values to a first threshold, wherein the first threshold follows a trend over a plurality of different drill pipe connections of variations of annular pressure data, wherein the trend is a function of length of uncased wellbore; and
increasing at least one of drill string hoisting speed, and drill string hoisting acceleration based on the comparison with the first threshold.
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Abstract
A method, comprising acquiring annular pressure data from a wellbore where the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period. At least first and second values are identified from the annular pressure data and the variation between the first and second values are compared to a first threshold. Drilling equipment is operated based on the comparison with the first threshold.
13 Citations
20 Claims
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1. A method, comprising:
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acquiring annular pressure data from a wellbore, wherein the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period; identifying at least first and second values from the annular pressure data; comparing the variation between first and second values to a first threshold, wherein the first threshold follows a trend over a plurality of different drill pipe connections of variations of annular pressure data, wherein the trend is a function of length of uncased wellbore; and increasing at least one of drill string hoisting speed, and drill string hoisting acceleration based on the comparison with the first threshold. - View Dependent Claims (2, 3, 4)
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5. A method, comprising:
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acquiring annular pressure data from a wellbore, wherein the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period; computing equivalent densities based upon the acquired annular pressure data; determining a first threshold by correlating the equivalent densities to drilling efficiency; and determining a second threshold by correlating the equivalent densities to drilling efficiency, wherein the second threshold is different from the first threshold; measuring annular pressure data within the wellbore; identifying at least first and second values from the measured annular pressure data; comparing the variation between first and second values to the first threshold and the second threshold; and operating drilling equipment based on the comparison with the first threshold and the second threshold. - View Dependent Claims (6, 7, 8, 9, 13, 14, 15, 19, 20)
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10. A method comprising:
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determining an equivalent density of a drilling fluid at a plurality of locations within a wellbore; correlating the equivalent densities to drilling efficiency so as to determine a first threshold; correlating the equivalent densities to drilling efficiency so as to determine a second threshold different from the first threshold; acquiring annular pressure data from a location within the wellbore, wherein the annular pressure data is acquired over a time interval and at least a portion of the annular pressure data is acquired during a pumps-off period; identifying at least first and second values from the annular pressure data; comparing the variation between first and second values to the first threshold and the second threshold; and operating drilling equipment based on the comparison with the first threshold and the second threshold. - View Dependent Claims (11, 12, 16, 17, 18)
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Specification