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US 7,644,763 B2Granted
Downhole cutting tool and method
AssigneeBaker Hughes Incorporated
InventorAndreas Peter
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a downhole cutting tool. The downhole cutting tool including, a cutting member mounted on a rotatable shaft, a shaft-deflecting device in operable communication with the shaft, and a motor in operable communication with the shaft.
Claims31
A downhole cutting tool, comprising:
- a cutting member mounted on a rotatable shaft;
- a motor in operable communication with the shaft;
- and
- a shaft-deflecting device in operable communication with the shaft configured to be actuated downhole to deflect the shaft with respect to the motor, the shaft-deflecting device comprising:
- a rotatable body with an axial through hole receptive of the shaft, the through hole being transversely elongated such that a first portion of the through hole is concentric with the rotatable body and a second portion of the through hole is eccentric with the rotatable body;
- and
- a piston located at the rotatable body and laterally extendable into the first portion in a direction toward the second portion.
4 more elements
A downhole cutting tool, comprising:
- a cutting member mounted on a rotatable shaft:
- a motor in operable communication with the shaft:
- a shaft-deflecting device in operable communication with the shaft configured to be actuated downhole to deflect the shaft with respect to the motor;
- and
- a sealable housing receptive of the shaft-deflecting device and the motor and sealable to the rotatable shaft.
2 more elements
A method of cutting a downhole tubular structure, comprising:
- inserting a cutting tool into a downhole tubular structure;
- rotating a shaft of the cutting tool with a cutting member attached thereto;
- deflecting the shaft with respect to a motor in operable communication therewith, with a shaft-deflecting device to thereby laterally deflect the cutting member to cuttingly engage a tubular structure;
- rotating the shaft-deflecting device at least one complete revolution;
- and
- sealing the shaft-deflecting device from downhole fluids.
3 more elements
A method of cutting a downhole tubular structure, comprising:
- inserting a cutting tool into a downhole tubular structure;
- rotating a shaft of the cutting tool with a cutting member attached thereto;
- deflecting the shaft with respect to a motor in operable communication therewith, with a shaft-deflecting device to thereby laterally deflect the cutting member to cuttingly engage a tubular structure;
- rotating the shaft-deflecting device at least one complete revolution;
- and
- pressurizing a piston to forcibly deflect the shaft.
3 more elements
Dependencies are inferred from the claim text.