A device, system, and/or method for hanging a casing in a borehole operation are provided. A gripping feature may be included on an inner surface of a larger casing. Then, a smaller casing is positioned within the larger casing, and the outer diameter of the smaller casing or the hanging mechanism is expanded to contact the larger casing's gripping feature. The result is a secure engagement between the two casings. This gripping feature may comprise grooves cut into the inner surface of the larger casing wherein the grooves may have a groove density, an uphole groove angle, a downhole groove, an orientation, and other features that improve the engagement between the two casings.

A method of selectively expanding a wall of a tubular includes assembling an expansion tool comprising a plurality of bi-directional boosters, arranging a predetermined number of explosive pellets a serially-arranged column between the bi-directional boosters, positioning a duel end firing explosive column tool within the tubular, and detonating the bi-directional boosters to simultaneously ignite opposing ends of the serially-arranged column to form two shock waves. The shock waves collide to create an amplified shock wave that travels radially outward to impact the tubular and expand a portion of the tubular wall radially outward, without perforating or cutting through the portion of the wall, to form a protrusion of the tubular at the portion of the wall. The protrusion extends into an annulus adjacent an outer surface of the wall of the tubular.

The present invention relates to a downhole packer assembly for expansion of a metal sleeve, such as a metal patch, in a well downhole in a well tubular metal structure, comprising a body part and an expandable tubular element surrounding the body part and each end of the expandable tubular element being connected with the body part, providing an expandable space therebetween, the expandable space being fillable with liquid during expansion, the expandable tubular element having an outer face and an inner face, the expandable tubular element comprising an elastomeric or rubber material having a friction coefficient, wherein the expandable tubular element comprises a friction-enhancing material providing a higher friction coefficient of the outer face than the friction coefficient of the elastomeric or rubber material. The invention also relates to a downhole system comprising the downhole packer assembly and a positive displacement pump for expanding the expandable tubular element.

A method and an apparatus for sealing perforations or cracks found in an oil well casing. The apparatus includes a hydraulic cylinder with an oil supply section at one end and a rod at another end, a cylindrical liner at least a portion of which is a malleable metal and a receiver, the liner with an outer diameter suitable for entry in to the well casing; and a frusto-conical wedge being disposed at a lower end of the liner and fixedly connected to the rod, the frusto-conical wedge having a section with a diameter larger than an inner diameter of the liner. The method includes lowering the apparatus into the well casing and increasing hydraulic pressure to the hydraulic cylinder sufficient to pull the frusto-conical shaped wedge into the liner providing sufficient lateral force to force sufficient liner material into the perforations or cracks of the well casing to seal the well casing wall

A casing patch system comprising a base tubular with two anchor/seals coupled to the base tubular and an expansion tool comprising two expansion devices positioned such that upon expansion of the first anchor/seal, the second expansion device engages the second anchor/seal, which allows reduction of the expansion forces due to sequential expansion and reduces the length of the displacement necessary for setting the casing patch, eliminating the need for resetting the thruster, which allows deployment and setting of the casing patch on a wireline. In another embodiment, the expansion device comprises two swages coupled to a shaft at a distance between them approximately equal to the length of the anchor/seal. The swage diameters are selected such that the expansion forces of the anchor/seal by front and back swages are approximately equal, resulting in significantly less expansion force compared to the expansion force necessary for expansion by a single swage, which allows a high degree of anchor/seal expansions unachievable by single swage expansion devices.

A downhole tool includes a top sub-assembly that couples to a downhole conveyance and a housing. The housing includes a bore that extends through the housing from the top sub-assembly to a downhole end of the housing opposite the uphole end, and a plurality of compartments fluidly coupled to the bore. The downhole end of the housing including a tapered portion. At least one of the plurality of compartments includes at least one piston configured to extend away from the housing to forcibly expand at least a portion of a wellbore tubular based at least in part on a fluid pressure in the at least one compartment. The tool includes at least one hydraulic swage coupled to the housing and configured to expand to forcibly expand at least the portion of the wellbore tubular based at least in part on a fluid pressure in the bore.

Provided, in one aspect, is an anchor for use with a downhole tool in a wellbore. The anchor, according to this aspect, may include a base pipe; and one or more expandable chambers positioned radially about the base pipe. The one or more expandable chambers may, in some aspects, be configured to move from a first collapsed state to a second activated state; and the one or more expandable chambers may be operable to handle at least 20.7 Bar of internal pressure in the second activated state to engage a wall of a wellbore.

A string includes a pipe that is connected to an expansion mechanism and a retrieval tool that is connected to the pipe above the expansion mechanism. The retrieval tool includes a carrier that can selectively latch on an expandable liner and one or more actuators. The retrieval tool can ensure latching of the carrier while the expandable liner is above the Blow-out Preventer. The retrieval tool can prevent accidental latching of the carrier on the expandable liner during the expansion of the liner. By manipulating the pipe, the retrieval tool can force the carrier's release from the expandable liner.

A workstring apparatus for creating an annular seal in a wellbore is described. Workstring comprises at least one packer apparatus comprising a body portion and an elastomeric packer element which is deformable into an outwardly deployed condition to deform wellbore casing. A fluid accumulator is provided to hold fluid to actuate at least one hydraulic cylinder of the packer apparatus. An electrically powered pump is operable to pump fluid from accumulator into the hydraulic cylinders of packer apparatus to deform the elastomeric packer element outwardly. A wireline connects the workstring to the surface and provides electrical power to the workstring. Wireline may be an electrical feed such as a composite rod or e-coil.

A system may include a processing device and a memory device that includes instructions to receive real-time data including wellhead pressure, a new sand measurement, and a new erosion rate for a wellbore. A model including an available reference sand rate for the wellbore based on the wellhead pressure and at least one of the new sand measurement or the new erosion rate of the wellbore may be calibrated. The model may be applied to determine a calibrated sand rate is within a pre-determined threshold. A new sand production rate for the wellbore based on the model may be determined.