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1. WO2020112080 - SYSTEM AND METHOD FOR CONTROLLING A DOWNHOLE OPERATION USING A CLUTCH TOOL

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[ EN ]

CLAIMS

What is claimed is:

1. A clutch tool for controlling torque transfer between first and second sections of a work string, the clutch tool comprising:

a housing that is non-rotatable with respect to the first section of the work string and comprising inner grooves;

an inner mandrel that is non-rotatable with respect to the second section of the work string, the inner mandrel comprising:

outer grooves that extend along only an axial portion of the inner mandrel; and a torque transition area opening from the outer grooves and extending completely around the inner mandrel;

a torque sleeve comprising inner protrusions engageable with the outer grooves and outer protrusions engageable with the outer grooves, the outer protrusions being angled;

a biasing device to bias the inner protrusions of the torque sleeve into engagement with the outer grooves;

wherein the biasing device is configured to bias the torque sleeve into engagement with both the inner and outer grooves such that torque is transferred between the housing and the inner mandrel;

wherein torque transfer between the housing and the inner mandrel overcomes the bias of the biasing device to move the torque sleeve axially along the inner mandrel; and

wherein when the torque exceeds a threshold, the torque sleeve is moved into the torque transition area, disengaging the torque sleeve from the outer grooves and preventing transmission of torque between the housing and the inner mandrel.

2. The clutch tool of claim 1, wherein the biasing device biases the torque sleeve in an uphole direction.

3. The clutch tool of claim 1, comprising an uphole sub coupled to the housing, wherein torque is transferred to the housing via the uphole sub.

4. The clutch tool of claim 1, comprising a downhole sub coupled to the inner mandrel, wherein torque is transferred from the inner mandrel via the downhole sub.

5. The clutch tool of claim 1, wherein an outer diameter of the torque transition area matches an outer diameter of the outer grooves.

6. The clutch tool of claim 1, wherein the torque sleeve is axially moveable from disengagement with the outer grooves to engagement with the outer grooves by the biasing device in response to a torque applied to the torque sleeve falling below the threshold torque.

7. The clutch tool of claim 5, wherein the threshold torque is below a torque rating of the second section of the work string.

8. The clutch tool of claim 1, wherein a first side of each of the outer grooves extends further along a length of the inner mandrel than a second side of each of the outer grooves.

9. The clutch tool of claim 1, wherein an outer diameter of the first section is greater than the second section.

10. The clutch tool of claim 1, wherein the inner grooves and the outer grooves are helical grooves.

11. A method for controlling torque between sections of a work string through a clutch tool, the method comprising:

transferring torque between a housing that is non-rotatable with respect to a first section of the work string and an inner mandrel that is non-rotatable with respect to a section of the work string via a torque sleeve engaged with and located between the housing and the inner mandrel;

increasing the amount of torque transferred through the torque sleeve above a threshold amount to axially move the torque sleeve against a biasing force in a first direction to a torque transition area where the torque sleeve and the housing are rotatable with respect to the inner mandrel and thus cease the transfer of torque; and

reestablishing torque transfer through the torque sleeve by axially moving the torque sleeve with the biasing force in a second direction out of the torque transition area by lowering torque applied to the torque sleeve below the threshold amount.

12. The method of claim 11, wherein biasing the torque sleeve comprises biasing the torque sleeve in an uphole direction.

13. The method of claim 11, wherein axially moving the torque sleeve into the torque transition area comprises disengaging from outer grooves of the inner mandrel, and the torque transition area has an outer diameter that matches an outer diameter of the outer grooves, and the torque transition area extends around the inner mandrel.

14. The method of claim 11, comprising transferring torque between the housing and the first section via an uphole sub coupled to the housing.

15. The method of claim 11, comprising transferring torque between the inner mandrel and the second section via a downhole sub coupled to the inner mandrel.

16. The method of claim 11, wherein a first side of each of the outer grooves extends further along a length of the inner mandrel than a second side of each of the outer grooves.

17. The method of claim 11, wherein the threshold torque is below a torque rating of the second section of the work string.

18. The method of claim 11, wherein an outer diameter of the first section is greater than an outer diameter of the second section.

19. The method of claim 11, wherein the inner grooves and the outer grooves are helical grooves.

20. A downhole work string comprising:

a first section comprising a first torque rating;

a second section rotatable with respect to the first section and comprising a second torque rating that is less than the first torque rating; and

a clutch tool for controlling torque transfer between the first and second sections of the work string, the clutch tool comprising:

a housing that is non-rotatable with respect to the first section of the work string and comprising inner grooves;

an inner mandrel that is non-rotatable with respect to the second section of the work string, the inner mandrel comprising:

outer grooves that extend along only an axial portion of the inner mandrel; and

a torque transition area opening from the outer grooves and extending completely around the inner mandrel and with an outer diameter that matches the outer diameter of the outer grooves; a torque sleeve comprising inner protrusions engageable with the outer grooves and outer protrusions engageable with the outer grooves, the outer protrusions being angled;

a biasing device to bias the inner protrusions of the torque sleeve into engagement with the outer grooves;

wherein the biasing device is configured to bias the torque sleeve into engagement with both the inner and outer grooves such that torque is transferred between the housing and the inner mandrel;

wherein torque transfer between the housing and the inner mandrel overcomes the bias of the biasing device to move the torque sleeve axially along the inner mandrel; and

wherein when the torque exceeds a threshold, the torque sleeve is moved into the torque transition area, disengaging the torque sleeve from the outer grooves and preventing transmission of torque between the housing and the inner mandrel.