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US 2016/0130904 A1Published application
Downhole machining system and method
AssigneeWelltec A/S
InventorTomas Sune ANDERSEN
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AssigneeWelltec A/S
InventorTomas Sune ANDERSEN
Estimating the term…
The present invention relates to a downhole machining system (1) for machining a casing (2) in a borehole in a well having a top. The downhole machining system comprises a first tool part (4) having an axial extension (5) and an anchoring section (6); a second tool part (7) adapted to rotate and move axially in relation to the first tool part, the second tool part comprising a machining bit (8) being movable in a direction radial in relation to the axial extension; a first actuator (10) comprising an electrical motor (11A) for axially moving the second tool part in relation to the first tool part; a second actuator (12) comprising an electrical motor (13) for rotating the second tool part in relation to the first tool part; and a third actuator (14) comprising an electrical motor (11b) for rotating the bit. At least one of the actuators comprises a gear (15) for changing a rotational speed of a rotor of the motor.
A downhole machining system for machining a casing in a borehole in a well having a top, comprising:
A downhole machining system according to any of the preceding claims, wherein the bit is moved radially in a bit housing, the bit has a sharp end facing the casing and a piston end, and the bit is moved radially in relation to the axial extension by means of an electrical motor driving a hydraulic cylinder which is in fluid communication with the bit housing pressing onto the piston end.
(canceled)
Dependencies are inferred from the claim text.