System, program products, and methods for controlling drilling fluid parameters
First Claim
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1. A method of controlling drilling fluid pressures, the method comprising the steps of:
- for each of a plurality of longitudinally separated locations of interest within a drilling system extending within a wellbore;
forming pressure volume and pressure volume time curves for the respective longitudinally separated location of interest responsive to measured fluid pressure data and measured volume data;
determining a change in fluid volume for fluid circulating portions of the drilling system, the change in fluid volume attributable to at least one of the following;
fluid kick and drilling system component breathing and ballooning;
differentiating between fluid kick and drilling system component breathing and ballooning when performing drilling operations responsive to the respective pressure volume and pressure volume time curves and earth formation compressibility data at a respective one of the plurality of locations of interest and at each longitudinally prior one of the plurality of locations of interest; and
responsive to the step of differentiating, controlling drilling system downhole pressure realtime when performing the drilling operations.
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Abstract
Embodiments of systems, program product, and methods for controlling drilling fluid pressures are provided. These embodiments, for example, can provide dynamic density control with highly adaptive, real-time, process-control and are scalable to any rig, large or small, on land or water. Combined static and dynamic stresses and displacements can be determined continuously at strategic locations in and around the wellbore of a well so that insitu and operational induced pressure window limitations at specific weak-points or other locations of interest are controlled.
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Citations
36 Claims
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1. A method of controlling drilling fluid pressures, the method comprising the steps of:
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for each of a plurality of longitudinally separated locations of interest within a drilling system extending within a wellbore;
forming pressure volume and pressure volume time curves for the respective longitudinally separated location of interest responsive to measured fluid pressure data and measured volume data;determining a change in fluid volume for fluid circulating portions of the drilling system, the change in fluid volume attributable to at least one of the following;
fluid kick and drilling system component breathing and ballooning;differentiating between fluid kick and drilling system component breathing and ballooning when performing drilling operations responsive to the respective pressure volume and pressure volume time curves and earth formation compressibility data at a respective one of the plurality of locations of interest and at each longitudinally prior one of the plurality of locations of interest; and responsive to the step of differentiating, controlling drilling system downhole pressure realtime when performing the drilling operations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. Dynamic density control program product to control drilling pressures, the program product comprising a set of instructions, stored on a tangible computer readable medium, that when executed by a computer, cause the computer to perform the operations of:
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for each of a plurality of longitudinally separated locations of interest within a drilling system extending within a wellbore;
forming pressure volume and pressure volume time curves for the respective longitudinally separated location of interest responsive to measured fluid pressure data and measured volume data;determining a change in fluid volume for fluid circulating portions of the drilling system, the change in fluid volume attributable to at least one of the following;
fluid kick and drilling system component breathing and ballooning;differentiating between fluid kick and drilling system component breathing and ballooning when performing drilling operations responsive to the respective pressure volume and pressure volume time curves and earth formation compressibility data at a respective one of the plurality of locations of interest and at each longitudinally prior one of the plurality of locations of interest; and responsive to the operation of differentiating, providing data to control drilling system downhole pressure realtime when performing the drilling operations. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system for controlling drilling fluid pressures, the system comprising:
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a dynamic density control computer including a processor and memory associated with the processor; and dynamic density control program product stored in the memory of the dynamic density control computer and including instructions that when executed by the processor of the dynamic density control computer, cause the computer to perform the operations of; for each of a plurality of longitudinally separated locations of interest within a drilling system extending within a wellbore;
forming pressure volume and pressure volume time curves for the respective longitudinally separated location of interest responsive to measured fluid pressure data and measured volume data,determining a change in fluid volume for fluid circulating portions of the drilling system, the change in fluid volume attributable to at least one of the following;
fluid kick and drilling system component breathing and ballooning,differentiating between fluid kick and drilling system component breathing and ballooning when performing drilling operations responsive to the respective pressure volume and pressure volume time curves and earth formation compressibility data at a respective one of the plurality of locations of interest and at each longitudinally prior one of the plurality of locations of interest, and responsive to the operation of differentiating, providing data to control drilling system downhole pressure realtime when performing the drilling operations. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification