Slickline conveyed shifting tool system
View Patent ↗A shifting tool is run on slickline and has an on board power supply. Rotary motion of the motor is converted to linear motion of the shifting tool using a ball screw device. The grip is obtained with longitudinal motion of a grip linkage and an on board jar then can do the shifting. Alternatively a linear motor can be used to extend and retract the grip assembly and shift using the jar tool. Optionally the tool can be anchored and linear motion from the on board power source operating a motor can do the shifting.
1. A subterranean tool or tools shifter apparatus, comprising:
a housing and a slickline to suspend said housing downhole;
a power supply in said housing;
an anchor powered by said power supply;
a shifter assembly radially and axially driven with respect to said anchor by a motor in said housing powered by said power supply;
said motor actuated by at least one of manipulation of said slickline, the surrounding subterranean conditions, and a pressure wave.
2. The apparatus of claim 1 , wherein:
said shifter assembly comprises a plurality of shifting keys powered by a ball screw driven by said motor.
3. The apparatus of claim 2 , wherein:
said shifting keys are mounted on a linkage with a bias acting on said linkage to retract said keys radially inwardly where said shifting keys do not extend beyond said housing.
4. The apparatus of claim 3 , further comprising:
said shifting keys selectively extendable and retractable a plurality of times for selective operation of the tool or tools.
5. The apparatus of claim 4 , wherein:
said shifting keys can extend to different dimensions to operate different tools.
6. The apparatus of claim 1 , wherein:
said motor comprises a linear motor.
7. The apparatus of claim 6 , wherein:
said shifter assembly comprises an extending shaft assembly movable in at least one direction to engage the tool while said housing is in contact with the tool to offset a reaction force from shaft movement.
8. The apparatus of claim 7 , wherein:
said shaft assembly comprises a setting piston to selectively open a port through said housing leading to a passage;
a actuating piston in said passage having said port on one side thereof and a variable volume chamber on an opposite side, whereupon movement of said setting piston well fluids
from said port shift said actuating piston to reduce the volume of said chamber for setting of the tool.
9. The apparatus of claim 1 , wherein:
said shifter assembly comprises an extending shaft assembly movable in at least one direction to engage the tool while said housing is in contact with the tool to offset a reaction force from shaft movement.
10. The apparatus of claim 9 , wherein:
said shaft assembly comprises a setting piston to selectively open a port through said housing leading to a passage;
a actuating piston in said passage having said port on one side thereof and a variable volume chamber on an opposite side, whereupon movement of said setting piston well fluids from said port shift said actuating piston to reduce the volume of said chamber for setting of the tool.
11. The apparatus of claim 1 , further comprising:
a sensor package that picks up a depth signal to selectively energize said motor with said power supply at a predetermined depth.