Abstract: A packer assembly includes a tubing string disposed in a wellbore and a packer releasably coupled to the tubing string. The packer includes a housing releasably coupled to the tubing string, a packer slip, a flexible sealing element, a piston coupled to the housing, a locking member, and a mandrel disposed inside the housing. The piston moves to activate the packer slip and the flexible sealing element to set the packer on a wall of the wellbore. The locking member engages the piston to constrain movement of the piston to keep the packer set on the wall of the wellbore. The mandrel connects to the tubing string when the tubing string is released from the housing. The locking member is collapsible to disengage the piston to unset the packer slip and the flexible sealing element responsive to shear force applied by the mandrel to the locking member.

Abstract: A downhole tool includes a streamlined housing sized to freely move through a wellbore formed from a terranean surface to a subterranean formation; an explosive material enclosed within an interior volume of the housing, the explosive material sufficient to cut at least a portion of a tubular positioned in the wellbore upon detonation; a detonator coupled to the explosive material; and a detonator control system communicably coupled to the detonator and configured to activate the detonator with a detonation signal to detonate the explosive material.

Abstract: A fluid management device includes a seal and a piston coupled to the seal and movable to an activated position to adjust the seal to an activated state. The seal includes first sealing elements extending radially inward towards a central axis of the fluid management device and second sealing elements extending radially inward towards the central axis, the first and second sealing elements together defining an opening sized to surround first and second pipes disposed within a wellbore containing wellbore fluid. In the activated state, the first sealing elements contact each other within the opening between the first and second pipes and seal against a first inner portion of the first pipe and a second inner portion of the second pipe to close the opening between the first and second pipes and a closed state of the opening prevents the wellbore fluid from exiting the wellbore through the opening.

Abstract: A well tool for cementing a portion of a well includes a cement retainer assembly and a capsule connected to the cement retainer assembly. The cement retainer assembly is configured to be disposed within a wellbore, and includes a ported sub and a cement retainer. The ported sub includes a port to flow cement out of the cement retainer assembly and into an annulus of the wellbore. The capsule includes a body defining an interior chamber of the capsule, where the interior chamber is configured to retain a fluid, and the capsule is configured to be disposed at a location within the wellbore and downhole of the cement retainer assembly.

Abstract: A wellhead assembly that includes a wellhead disposed at a surface of a wellbore, a production tree fluidically coupled to the wellhead, and a telescopic adaptor assembly residing between and fluidically coupled to the wellhead and the production tree. The telescopic adaptor assembly extends or retracts to change an elevation of the production tree with respect to the wellhead and rotates to change a radial position of the production tree with respect to the wellhead. The telescopic adaptor assembly includes a flange attached to the wellhead and a first pipe rotationally coupled to the flange. The first pipe is rotational about a longitudinal axis of the first pipe. The telescopic adaptor assembly includes a second pipe attached to the production tree and is disposed concentrically inside the first pipe. The second pipe is movable along the longitudinal axis with respect to the first pipe.

Abstract: A hollow milling-bit defines a first interior flow passage. A junk catcher sub is connected to the hollow milling-bit and positioned between the hollow milling-bit and the uphole end. A junk recovery tube is connected to the junk catcher sub and positioned between the junk catcher sub and the uphole end. A reverse circulation diverter sub is connected to the junk recovery tube and positioned between the junk recovery tube and the uphole end. The reverse circulation diverter sub includes a ball seat configured to receive a ball. The first recirculation passage fluidically connects the interior flow passage to an outer surface of the tool. The second recirculation passage fluidically connects the interior flow passage to an outer surface of the tool. A catch basket that defines openings is connected to a downhole end of the reverse circulation diverter sub and positioned in the third interior flow passage in-line.

Abstract: A subsurface safety valve assembly has a valve body with an axially oriented valve bore and a valve cavity that intersects the valve bore. A disk valve member is positioned within the valve cavity and has a disk bore. A piston member is moveable between a contracted position and an extended position, such that in the contracted position the disk valve member is in a valve closed position with the disk bore offset from the valve bore, and in the extended position the disk valve member is in a valve open position with the disk bore axially aligned with the valve bore. An uphole seal member circumscribes the valve bore, forming a seal between the uphole side of the disk valve member and the valve body. A downhole seal member circumscribes the valve bore, forming a seal between the downhole side of the disk valve member and the valve body.

Abstract: A cellar around a wellbore is formed or deepened with an excavating system that is capable of being assembled around an existing wellbore. The system includes an excavating unit having an annular body with a cutting surface that excavates cuttings from ground around the wellbore. The cuttings are directed up through a slot in the body, and are collected inside a receptacle set in a recess of the body. An opening is formed in a side of the receptacle when in the body, and through which the cuttings pass from the slot into the receptacle. The receptacle is removable from within the recess and cuttings collected within are emptied. When the receptacle is removed from the recess, the opening is automatically covered to retain the cuttings inside the receptacle. Another cellar around a different wellbore is formed by disassembling the excavating system and relocating it to the different wellbore.

Abstract: A method of plugging a formation fracture includes drilling, with a drill string configured to flow drilling fluid, a wellbore, where, at a downhole location, the drilling fluid is lost through a formation fracture. The method also includes deploying, through the drill string, a plugging assembly to the downhole location of the wellbore. The plugging assembly includes a flexible fiber sheet releasably coupled to a pumpable dart such that when the plugging assembly reaches the downhole location, the flexible fiber sheet is released from the dart to flow, with the drilling fluid, to the formation fracture to at least partially overlay the formation fracture. The method also includes adding, to the drilling fluid, lost circulation material configured to accumulate on a portion of the flexible fiber sheet to at least partially fluidically plug the formation fracture.

Abstract: An apparatus includes a housing, engagement slips, a tubular, a taper tap, a pin, and a slip activation member. The housing includes a profile that defines a path including a first end and a second end. The engagement slips are attached to the housing. The tubular passes through an opening of the housing. The taper tap is rotatable and connected to the housing. The pin is connected to the tubular and received by the profile of the housing. The tubular is translatable with respect to the housing based on the pin translating along the path defined by the profile. The slip activation member is connected to the tubular. The slip activation member is configured to move each of the engagement slips radially outward with respect to the housing when the pin translates to the second end of the path.

Abstract: A sidetrack window is cut in a cased wellbore by disposing a sidetracking assembly within the cased wellbore. A first ball is deployed into a drill string of the sidetracking assembly. The first ball leaves the drill string and lands on a ball seat of a cement retainer to block fluid outlet of the cement retainer. Then, the cement retainer is set and a second fluid outlet of the cement retainer is exposed. Cement is flowed through the drill string to the portion of the cased wellbore downstream of the cement retainer to plug the portion of the wellbore. The whipstock assembly is separated from the cement retainer. A second ball is deployed inside the drill string to land on the seat of the whipstock assembly to block a fluid outlet of the whipstock assembly. The whipstock assembly is anchored in the cased wellbore and the milling system is actuated to begin cutting the sidetrack window.

Abstract: A cutting assembly is housed within a main body. The cutting assembly includes a rotary blade mounted vertically within the main body. A blade motor is coupled to the rotary blade. The blade motor is configured to rotate the rotary blade with sufficient speed and torque to cut through a wellbore tubular. The blade motor is supported by a blade motor mount. A lead screw is coupled to the blade motor mount. The lead screw is rotatable to control a vertical position of the rotary blade. A lead screw motor is rotably coupled to the lead screw. The lead screw motor is configured to rotate the lead screw to adjust the vertical position of the rotary blade. A guide is located within the main body. The guide includes a profile that controls a horizontal position of the blade based on the vertical position of the rotary blade.

Abstract: A downhole tool assembly including a bridge plug and a cement retainer in tandem to be deployed into a wellbore on the same run or trip for remedial cementing of the wellbore.

Abstract: A subsurface safety valve assembly has a valve body with an axially oriented valve bore and a valve cavity that intersects the valve bore. A disk valve member is positioned within the valve cavity and has a disk bore. A piston member is moveable between a contracted position and an extended position, such that in the contracted position the disk valve member is in a valve closed position with the disk bore offset from the valve bore, and in the extended position the disk valve member is in a valve open position with the disk bore axially aligned with the valve bore. An uphole seal member circumscribes the valve bore, forming a seal between the uphole side of the disk valve member and the valve body. A downhole seal member circumscribes the valve bore, forming a seal between the downhole side of the disk valve member and the valve body.

Abstract: A downhole tool assembly including a bridge plug and a cement retainer in tandem to be deployed into a wellbore on the same run or trip for remedial cementing of the wellbore.

Abstract: One downhole-type tool of a set of interchangeable downhole-type tools is interchangeably received by a pump-down adapter. The downhole-type tool is positioned by the pump-down adapter within a wellbore tubular. The downhole-type tool is released by the pump-down adapter.

Abstract: A well tool for cementing a portion of a well includes a cement retainer assembly and a capsule connected to the cement retainer assembly. The cement retainer assembly is configured to be disposed within a wellbore, and includes a ported sub and a cement retainer. The ported sub includes a port to flow cement out of the cement retainer assembly and into an annulus of the wellbore. The capsule includes a body defining an interior chamber of the capsule, where the interior chamber is configured to retain a fluid, and the capsule is configured to be disposed at a location within the wellbore and downhole of the cement retainer assembly.

Abstract: A kick detection system includes an apparatus configured to be retrievably attached to a production tubing in a well. The apparatus includes a housing, a first pressure sensor, a second pressure sensor, and a flow detection device. The first and second pressure sensors are configured to sense respective local pressure of downhole fluid flowing through the housing. The flow detection device is configured to detect a direction of downhole fluid flowing through the housing. The kick detection system includes a computer configured to determine one or more downhole well properties of the downhole fluid based on respective signals received from the first pressure sensor, the second pressure sensor, and the flow detection device. The computer is configured to determine whether a kick is occurring in the well based on the determined one or more downhole well properties of the downhole fluid.

Abstract: A hollow milling-bit defines a first interior flow passage. A junk catcher sub is connected to the hollow milling-bit and positioned between the hollow milling-bit and the uphole end. A junk recovery tube is connected to the junk catcher sub and positioned between the junk catcher sub and the uphole end. A reverse circulation diverter sub is connected to the junk recovery tube and positioned between the junk recovery tube and the uphole end. The reverse circulation diverter sub includes a ball seat configured to receive a ball. The first recirculation passage fluidically connects the interior flow passage to an outer surface of the tool. The second recirculation passage fluidically connects the interior flow passage to an outer surface of the tool. A catch basket that defines openings is connected to a downhole end of the reverse circulation diverter sub and positioned in the third interior flow passage in-line.

Abstract: A well tool for cementing a portion of a well includes a cement retainer assembly and a capsule connected to the cement retainer assembly. The cement retainer assembly is configured to be disposed within a wellbore, and includes a ported sub and a cement retainer. The ported sub includes a port to flow cement out of the cement retainer assembly and into an annulus of the wellbore. The capsule includes a body defining an interior chamber of the capsule, where the interior chamber is configured to retain a fluid, and the capsule is configured to be disposed at a location within the wellbore and downhole of the cement retainer assembly.