Apparatus and methods for operating downhole tools
AssigneeWellbore Integrity Solutions LLC
InventorJacob Lenoir
Life of this patent
Estimating the term…
Abstract
A tool assembly deployed in a wellbore with a running string includes a pressure booster sub. The booster sub is located between a first tool and a second tool. The first tool upstream of the booster sub is exposed to a relatively low pressure via the running string. The pressure booster sub is exposed to the relatively low pressure, and creates a relatively high pressure downstream of the booster sub. The second tool, downstream of the booster sub, is actuated by the relatively high pressure. The booster sub includes a piston. The piston includes a piston head with a first cross-sectional area, and a piston rod with a second cross-sectional area less than the first cross-sectional area.
Claims19
An assembly for use with a downhole tool, the assembly comprising:
- an anchor comprising:
- a first housing;
- an anchor element coupled to the first housing, and movable with respect to the first housing between a retracted position and an extended position;
- a first piston that is coupled to the first housing;
- and
- a booster sub coupled to the anchor, the booster sub comprising:
- a second housing;
- a second piston disposed in the second housing, the second piston isolating a first fluid in the anchor from a second fluid in the booster sub, and the second piston including a first seal and a second seal spaced from the first seal;
- and
- a vent in the second housing that is positioned between the first seal and the second seal,
- wherein when the anchor element is in the retracted position, the second piston is movable relative to the second housing in a first direction and in an opposite second direction, and wherein movement of the second piston in the first direction is configured to move the first piston in the second direction to move the anchor element from the retracted position to the extended position.
An assembly comprising:
- an anchor comprising:
- a first housing containing a first fluid;
- an anchor element coupled to the first housing, and movable with respect to the first housing between a retracted position and an extended position;
- and
- a first piston that is coupled to the first housing and that is configured to move the anchor element from the retracted position to the extended position;
- a booster sub coupled to the anchor, the booster sub comprising:
- a second housing containing a second fluid;
- and
- a second piston disposed in the second housing, and including a pair of seals that are configured to isolate isolating the second fluid from the first fluid, wherein movement of the second piston is configured to cause movement of the first piston;
- and
- a vent in the second housing that is positioned between the pair of seals to prevent pressure lock between the pair of seals;
- a whipstock coupled to the booster sub, the whipstock including a hydraulic line containing the second fluid and fluidically coupled to the booster sub;
- and
- a running tool coupled to the whipstock, the running tool fluidically coupled to the hydraulic line, and comprising:
- a third housing containing a third fluid;
- and
- a barrier disposed in the third housing, the barrier separating the third fluid from the second fluid.
Dependencies are inferred from the claim text.