Tractor traction control for cased hole
AssigneeHalliburton Energy Service, Inc.
InventorNazareth Sarkis Bedrossian
Life of this patent
Estimating the term…
Abstract
Traction for a downhole tractor in a wellbore. A downhole propulsion system can provide a first traction module; a second traction module; and a controller configured to compare a first input parameter representing operation of the first traction module with a second input parameter representing operation of the second traction module. The controller can adjust a first output parameter of the first traction module and/or a second output parameter of the second traction module based on an input representing slip of the first traction module relative to the second traction module.
Claims18
A downhole propulsion system, comprising:
- a first traction module;
- a second traction module;
- and
- a controller that compares a first input parameter representing operation of the first traction module with a second input parameter representing operation of the second traction module,
- wherein the controller adjusts at least one of a first normal force of the first traction module and a second normal force of the second traction module when a difference between the first input parameter and the second input parameter exceeds a predetermined threshold.
A tool string, comprising:
- a first assembly including a first traction module;
- a second assembly including a second traction module and axially offset from the first traction module;
- at least one downhole tool;
- and
- a controller that compares a first input parameter representing operation of the first traction module with a second input parameter representing operation of the second traction module,
- wherein the controller adjusts at least one of a first normal force of the first traction module and a second normal force of the second traction module when a difference between the first input parameter and the second input parameter exceeds a predetermined threshold.
A method, comprising:
- comparing a first input parameter representing operation of a first traction module with a second input parameter representing operation of a second traction module;
- and
- if a difference between the first input parameter and the second input parameter exceeds a threshold, adjusting at least one of a first normal force of the first traction module and a second normal force of the second traction module.
Dependencies are inferred from the claim text.