Methods and systems for drilling
AssigneeShell Oil Company
InventorsDavid Alston Edbury, Jose Victor Guerrero, Duncan Charles MacDonald, James Bryon Rogers, Donald Ray Sitton
Life of this patent
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Abstract
A method of steering a drill bit to form an opening in a subsurface formation, comprises a) determining a distance from design of a well, and b) determining an angle offset from design of the well wherein angle offset from design is the difference between the inclination and azimuth of the hole and the inclination and azimuth of plan, c) wherein at least one distance from design and at least one angle offset from design are determined in real time based, at least in part, on a position of the hole at the last survey, a position at a projected current location of the bit, and a projected position of the bit.
Claims13
A method of steering a drill bit to form a hole having an inclination and an azimuth in a subsurface formation using a planned well path and at least first and second surveys, comprising:
- a) determining a distance from design of a well, wherein the distance from design is the difference between the position of the bit at the second survey and the planned well path;
- b) determining an angle offset from design of the well wherein angle offset from design is the difference between the inclination and azimuth of the hole and the inclination and azimuth of the planned well path,
- c) wherein at least one distance from design and at least one angle offset from design are determined in real time based, at least in part, on a position of the hole at the first survey, a position at a projected current location of the bit, and a projected position of the bit.
Dependencies are inferred from the claim text.