System for controlled drilling of boreholes along planned profile
First Claim
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1. A system for controlled drilling of a borehole, comprising:
- means for drilling a borehole;
means positioned in said borehole for storing a planned borehole path;
means positioned in said borehole for obtaining instantaneous downhole information relating to the depth of said drilling means within said borehole for providing a profile of an actual drilled path of said borehole;
means positioned in said borehole for comparing said actual drilled path with said planned path and for generating a correction signal representing the difference between said actual drilled path and said planned path; and
means responsive to said correction signal to cause said drilling means to drill said borehole along a corrected path to cause the drilled borehole path to coincide with said planned path.
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Abstract
An improved method and apparatus for automatically controlling the direction of advance of a rotary drill to produce a borehole profile substantially as preplanned with minimal curvature while maintaining optimum drilling performance. The system is capable of storing a planned path for the borehole. Information relating to the profile of the actual drill path is compared to the planned path and an appropriate correction signal is generated and used to cause the borehole to be drilled in accordance with the planned path.
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Citations
22 Claims
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1. A system for controlled drilling of a borehole, comprising:
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means for drilling a borehole; means positioned in said borehole for storing a planned borehole path; means positioned in said borehole for obtaining instantaneous downhole information relating to the depth of said drilling means within said borehole for providing a profile of an actual drilled path of said borehole; means positioned in said borehole for comparing said actual drilled path with said planned path and for generating a correction signal representing the difference between said actual drilled path and said planned path; and means responsive to said correction signal to cause said drilling means to drill said borehole along a corrected path to cause the drilled borehole path to coincide with said planned path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for controlled drilling of a directional borehole, comprising,
means for drilling a borehole; -
means for controlling the direction of said drilling means; means positioned in said borehole for storing a planned path for a borehole; means positioned in said borehole for obtaining information relating to the instantaneous depth of said drilling means within said borehole; means positioned in said borehole for obtaining information relating to the instantaneous direction of said borehole; means for utilizing said depth information and said direction information to provide a profile of the drilled path; means for comparing said drilled path with said planned path and for generating a correction signal representing the difference between said drill path and said planned path; calculation means operable connected to said means for controlling the direction of said borehole, said calculation means being capable of receiving an updated planned borehole path from the surface, said calculation means comprising means for implementing adaptive directional control based on parametric directional control equations; and means responsive to said correction signal to cause said drilling means to calculate a corrected path to cause the drilled borehole path to coincide with said planned path. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system for controlled drilling of a borehole comprising:
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means for drilling a borehole; means positioned in said borehole for storing a planned borehole path; means positioned in said borehole for obtaining information relating to the depth of said drilling means within said borehole; means positioned in said borehole for calculating the actual drilled path of said borehole; means positioned in said borehole for comparing said actual drilled path with said planned path and for generating a signal representing the difference between said actual drilled path and said planned path; and means responsive to said signal to cause said drilling means to drill said borehole along said planned path. - View Dependent Claims (21, 22)
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Specification