Modeling Vibration Effects Introduced By Mud Motor
AssigneeSchlumberger Technology Corporation
InventorsJahir A. Pabon, Yong Chang, Nathaniel Wicks, Richard Harmer, Yingyu Fang, Xiaoyan Shi
Life of this patent
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Abstract
Torsional, axial and lateral vibrations introduced when a mud motor is used with a drilling tool to drill a borehole are calculated using a model. The model includes different computational modules for each of three distinct motor sections: power, transmission and bearing. The resulting calculated vibration effects are used to enhance the drilling tool and drilling operation.
Claims32
A method for modeling vibration introduced to a drilling tool by a mud motor, comprising:
- separately computing at least one vibration effect for each one of a plurality of sections of the mud motor;
- computing interactions between ones of the sections to produce modeled vibration effects;
- and
- controlling an aspect of drilling based at least in part on the modeled vibration effects.
Apparatus for enhancing drilling with a drilling tool, comprising:
- a mud motor;
- at least one sensor that collects raw vibration data proximate to the mud motor;
- a device that operates in response to the vibration data from the at least one sensor to separately compute at least one vibration effect for the each one of a plurality of sections of the mud motor, compute interactions between ones of the sections to produce modeled vibration effects, and control an aspect of drilling based at least in part on the modeled vibration effects.
A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for modeling vibration effects introduced to a drilling tool by a mud motor, said method comprising:
- separately computing at least one vibration effect for each one of a plurality of sections of the mud motor;
- computing interactions between ones of the sections to produce modeled vibration effects;
- and
- controlling an aspect of drilling based at least in part on the modeled vibration effects.
A method for enhancing a drilling plan comprising:
- building a model based on a proposed tool design and anticipated drilling conditions;
- computing performance of the proposed tool, including dynamic effects introduced by a mud motor;
- and
- if computed performance is not satisfactory, modifying at least one of the drilling plan and the proposed tool design.
A method for enhancing a tool model comprising:
- building a model based on a proposed tool design and anticipated drilling conditions;
- computing performance of the proposed tool design, including dynamic effects introduced by mud motor;
- collecting data from operation of a tool corresponding to the proposed tool design;
- comparing computed performance with collected data;
- and
- if performance of the model is not satisfactory, modifying the tool model.
Dependencies are inferred from the claim text.