Slickline conveyed tubular cutter system
View Patent ↗A tubular cutter is run in on slickline. It features onboard power to selectively actuate an anchor and to initiate a tubular cutting operation with a cutter that is extendable and rotatable on its axis and the axis of the tool that carries an on board power supply.
1. A tubular cutter assembly for downhole use, comprising:
a housing and a slickline to suspend said housing downhole;
a power supply in said housing;
an anchor assembly on said housing selectively powered by said power supply;
a cutter assembly on said housing selectively powered by said power supply, said cutter assembly comprising a plurality of rotating cutters mounted on a motor driven mechanical linkage for selective radial movement toward and away from the tubular to control the rate of cutting and to retract said cutters when the cutting is complete;
said anchor assembly and said cutter assembly are actuated to start by a control system powered by said power supply on the occurrence of one of a time delay or a sensing of depth in the wellbore.
2. The assembly of claim 1 , wherein:
said cutter assembly further comprises at least one cutter radially extendable and supported on a rotatable housing.
3. The assembly of claim 1 , wherein:
said anchor assembly is powered by a different motor than said cutter assembly.
4. The assembly of claim 3 , wherein:
said anchor assembly comprises a plurality of grippers selectively radially extendable using a ball screw mechanism.
5. A tubular cutter assembly for downhole use, comprising:
a housing and a slickline to suspend said housing downhole;
a power supply in said housing;
an anchor assembly on said housing selectively powered by said power supply;
a cutter assembly on said housing selectively powered by said power supply;
said anchor assembly and said cutter assembly are actuated to start by a control system powered by said power supply on the occurrence of one of a time delay or a sensing of depth in the wellbore;
said cutter assembly further comprises at least one cutter radially extendable and supported on a rotatable housing;
said cutter and said rotatable housing are driven by a common cutter motor powered by said power supply.
6. The assembly of claim 5 , wherein:
said cutter is radially moved using a linkage connected to a ball screw drive assembly powered by said cutter motor.
7. The assembly of claim 6 , wherein:
said rotatable housing is powered by said cutter motor through gears.
8. The assembly of claim 7 , wherein:
said cutter is articulated to extend radially as said rotatable housing turns.
9. The assembly of claim 3 , wherein:
said cutter motor rotation is reversed by a control system upon a predetermined radial extension of said cutter.