A seal assembly for sealing between an inner surface of a bore and an outer surface of a mandrel includes at least one annular seal including a channel disposed in an axial end thereof with a locking shoulder facing axially away from an opening end of the channel. The annular seal has an innermost diameter that is smaller than an outer diameter of the mandrel and has an outermost diameter that is larger than an inner diameter of the bore. An annular locking ring includes a locking member at a first axial end that is received in the channel of the at least one annular seal and having a ledge portion engaged with the locking shoulder of the annular seal. The ledge portion includes at least one slot extending axially there through.

A downhole liner delivery tool includes a housing with a flow path; a detachable nose assembly coupled to the housing and fluidly coupled to the flow path and including one or more retractable grips; a flexible wellbore liner including a first end coupled to the detachable nose assembly and a second end coupled within the housing and stored within the flow path of the housing; a seat formed in the flow path and configured to receive a member dropped in a wellbore to increase a fluid pressure of a fluid resin pumped through the flow path to anchor the one or more retractable grips to a wellbore wall and detach the detachable nose assembly from the housing, the fluid resin further pumped through the flow path to deploy the flexible wellbore liner from the housing and seal the flexible wellbore liner against the wellbore wall.

A downhole liner delivery tool includes a housing with a flow path; a detachable nose assembly coupled to the housing and fluidly coupled to the flow path and including one or more retractable grips; a flexible wellbore liner including a first end coupled to the detachable nose assembly and a second end coupled within the housing and stored within the flow path of the housing; a seat formed in the flow path and configured to receive a member dropped in a wellbore to increase a fluid pressure of a fluid resin pumped through the flow path to anchor the one or more retractable grips to a wellbore wall and detach the detachable nose assembly from the housing, the fluid resin further pumped through the flow path to deploy the flexible wellbore liner from the housing and seal the flexible wellbore liner against the wellbore wall.

A method including precipitating a precipitate including one or more divalent cation carbonates from a solution including the divalent cation of each of the one or more divalent cation carbonates, and storing at least a portion of the precipitate downhole by placing the at least the portion of the precipitate downhole via a well. Precipitating can include contacting the solution with a gas, such as atmospheric air, including carbon dioxide (CO.sub.2). The method can further include separating the precipitate from the solution, and forming a slurry including the at least a portion of the precipitate. Placing the at least the portion of the precipitate downhole via the well can include pumping the slurry downhole via the well. A system is also provided. Via the system and method, CO.sub.2 can be sequestered downhole.

A method including precipitating a precipitate including one or more divalent cation carbonates from a solution including the divalent cation of each of the one or more divalent cation carbonates, and storing at least a portion of the precipitate downhole by placing the at least the portion of the precipitate downhole via a well. Precipitating can include contacting the solution with a gas, such as atmospheric air, including carbon dioxide (CO.sub.2). The method can further include separating the precipitate from the solution, and forming a slurry including the at least a portion of the precipitate. Placing the at least the portion of the precipitate downhole via the well can include pumping the slurry downhole via the well. A system is also provided. Via the system and method, CO.sub.2 can be sequestered downhole.

A downhole perforation tool includes an upper sub-assembly configured to couple to a downhole conveyance within a wellbore that is formed from a terranean surface toward a subterranean formation; a plurality of perforation sub-assemblies, where each perforation sub-assembly includes one or more perforation guns, and one or more ports configured to fluidly couple the wellbore with a bore that extends from the one or more ports to the upper sub-assembly; a main wellbore seal positioned between the upper sub-assembly and the plurality of perforation sub-assemblies, the main wellbore seal actuatable to anchor the downhole perforation tool to a casing in the wellbore; and at least one secondary wellbore seal positioned between adjacent perforation sub-assemblies of the plurality of perforation sub-assemblies, the at least one secondary wellbore seal actuatable to fluidly isolate a portion of an annulus of the wellbore from another portion of the annulus of the wellbore.

An overshot apparatus includes a tubular housing and a grapple disposed within a bore of the tubular housing. The grapple has a central opening to receive a fish and is operable to grip an outer diameter of the fish. A stinger is supported in the bore by an adapter attached to an upper end of the tubular housing. The stinger is positioned to be inserted into the fish received in the central opening of the grapple. A packing element is positioned on an external surface of the stinger to engage an inner diameter of the fish when the stinger is inserted into the fish and the fish is received within the central opening of the grapple. The adapter and stinger have conduits for passage of fluid into the fish.

A downhole tool, provided with: a downhole-tool member containing a reactive metal; a downhole-tool member containing a degradable resin composition that promotes degradation of the reactive metal, preferably a degradable resin composition containing a degradable resin that generates an acid by degradation or a degradable resin composition containing a degradable resin and an inorganic substance or organic substance that promotes degradation of the reactive metal; and, as desired, a degradable rubber member. Moreover, a well-drilling method using this downhole tool.

Systems and methods are disclosed for a well tool. The well tool system includes a receiving tool including two ends positioned in a wellbore tubular in a predetermined orientation. The receiving tool is configured to transition from an inactive state to an active state in response to a triggering signal. The well tool system further includes a transmitting tool at a surface and proximate to the receiving tool. The transmitting tool is configured to wirelessly transmit the triggering signal to the receiving tool using inductive coupling based on the predetermined orientation.

Systems and methods are disclosed for a well tool. The well tool system includes a receiving tool including two ends positioned in a wellbore tubular in a predetermined orientation. The receiving tool is configured to transition from an inactive state to an active state in response to a triggering signal. The well tool system further includes a transmitting tool at a surface and proximate to the receiving tool. The transmitting tool is configured to wirelessly transmit the triggering signal to the receiving tool using inductive coupling based on the predetermined orientation.