Downhole hydraulic pipe cutter
AssigneeBaker Hughes Incorporated
InventorsFreeman L. Hill, Douglas W. Spencer, Jerry E. Miller, Chris Walter
Life of this patent
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Abstract
The casing cutter disclosed herein is useful for severing downhole tubulars and comprises a body, slips, a cutting head, cutting blades, and actuators for operating the cutting head and cutting blades. The casing cutter can be anchored within casing wellbore with the slips to provide anchoring support during the cutting operation. Cutting is accomplished by rotatingly actuating the cutting head with an associated motor, and then radially extending the cutting blades away from the cutting head. The cutting blades are actuated by a hydraulic motor operatively coupled to the cutting blades by a series of gears.
Claims29
A tubular cutting device comprising:
- a head;
- a cutting element disposed on said head;
- a first actuator coupled with said head;
- and
- a second actuator coupled with said cutting element, wherein said second actuator comprises a hydraulic system in operative cooperation with a gear arrangement, wherein the hydraulic system and gear arrangement are configured to extend the cutting element away from the head into cutting contact with a tubular.
A cutting device useful in severing tubular members comprising:
- a housing;
- a motor disposed within said housing;
- a cutting member slidingly disposed on said housing and selectively moveable perpendicular to the axis of said housing;
- and
- a hydraulic system in mechanical cooperation with said cutting member through a gear arrangement, wherein the gear arrangement is configured to move the cutting member away from the housing into a cutting position, wherein implementation of said hydraulic system enables said cutting member to respond to variations in the material of the tubular member being severed.
Dependencies are inferred from the claim text.