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.
Claims21
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;
- and
- a booster sub coupled to the anchor, the booster sub comprising:
- a second housing;
- a booster piston disposed in the second housing, the booster piston isolating a first fluid in the anchor from a second fluid in the booster sub, and the booster 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 booster piston is movable relative to the second housing in a first direction and in an opposite second direction.
(canceled)
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;
- a booster sub coupled to the anchor, the booster sub comprising:
- a second housing containing a second fluid;
- a booster piston disposed in the second housing, and including a pair of seals that are configured to isolate the second fluid from the first fluid;
- 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.