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US 2021/0231000 A1Published application
Methods relating to tool face orientation
AssigneeUTI Limited Partnership
InventorsJean Antoine Jacques Roger AURIOL, Roman Jgorevich SHOR
Life of this patent
Estimating the term…
Abstract
Systems and methods for controlling an orientation of a tool face for a drilling rig. Multiple methods are provided that use estimated tool face orientation along with measured parameters to determine inputs to the drilling rig such that, after activation, the tool face has a desired orientation.
Claims7
A method for controlling an orientation of a drilling rig tool face, the method comprising:
- a) stabilizing an angular velocity of a borehole assembly of said drilling rig to an angular velocity reference;
- b) determining an estimated orientation of said tool face;
- c) executing either steps d) to h) or i) to n);
- d) determining a first trajectory that adjusts said estimated orientation of said tool face to a desired orientation;
- e) determining a second trajectory for an angular velocity of said borehole assembly based on said first trajectory;
- f) determining control inputs for said drilling rig to produce said second trajectory;
- g) applying said control inputs to said drilling rig to thereby produce said desired orientation;
- h) ending said method;
- i) adjusting said angular velocity reference for said drill rig by applying a function to said angular velocity reference such that said angular velocity reference smoothly reduces to zero;
- j) determining a new estimated orientation of said tool face, said new estimated orientation being a result of executing step i);
- k) restarting said borehole assembly and stabilizing said angular velocity of said borehole assembly to said angular velocity reference;
- l) continuing operation of said borehole assembly until an orientation of said tool face is equal to a desired orientation plus a difference between said estimated orientation and said new estimated orientation;
- m) applying said function to said angular velocity reference;
- n) repeating steps j)-n) in the event an orientation of said tool face is not equal to said desired orientation.
11 more elements
A method for controlling an orientation of a drilling rig tool face, the method comprising:
- a) stabilizing a velocity of a borehole assembly of said drilling rig to a velocity reference;
- b) prior to a motor of top drive reaching a release torque that causes motion to said tool face, increasing an input to said top drive to cause an increase in torque in said motor, an increase in said input being of a specified value;
- c) determining an initial estimated difference in orientation of said tool face due to said increase in input;
- d) repeating steps a) and b) with said input having a value equal to an immediately preceding input value and said specified value;
- e) determining a second estimated difference in orientation of said tool face due to said input equalling said immediately preceding input value and said specified value;
- f) determining a desired input value to produce said desired orientation based at least on said initial estimated difference and said second estimated difference and said specified value;
- g) repeating step a) and applying said desired input value determined in step f) to produce said desired orientation of said tool face.
4 more elements
A method for controlling an orientation of a drilling rig tool face, the method comprising:
- a) stabilizing a velocity of a borehole assembly of said drilling rig to a velocity reference;
- b) determining an estimated orientation of said tool face;
- c) determining a first trajectory that adjusts said estimated orientation of said tool face to a desired orientation;
- d) determining a second trajectory for a velocity of said borehole assembly based on said first trajectory;
- e) determining control inputs for said drilling rig to produce said second trajectory;
- f) applying said control inputs to said drilling rig to thereby produce said desired orientation.
3 more elements
A method for controlling an orientation of a drilling rig tool face, the method comprising:
- a) stabilizing a velocity of a borehole assembly of said drilling rig to a velocity reference;
- b) determining an estimated orientation of said tool face;
- c) adjusting said velocity reference for said drill rig by applying a function to said velocity reference such that said velocity reference smoothly reduces to zero;
- d) determining a new estimated orientation of said tool face, said new estimated orientation being a result of executing step c);
- e) restarting said borehole assembly and stabilizing said velocity of said borehole assembly to said velocity reference;
- f) continuing operation of said borehole assembly until an orientation of said tool face is equal to a desired orientation plus a difference between said estimated orientation and said new estimated orientation;
- g) applying said function to said velocity reference;
- h) repeating steps d)-h) in the event an orientation of said tool face is not equal to said desired orientation.
5 more elements
Dependencies are inferred from the claim text.