A method of manufacturing a valve of a tool for use downhole includes changing a flow characteristic of the valve. A load is applied to a first nozzle secured in a housing of the valve via a first release member, wherein a magnitude of the load is greater than a release threshold of the first release member, to release the first release member. The first nozzle is removed from the housing, and a second nozzle is secured in the housing via a second release member.

Disclosed is an apparatus and system, and a method of using the same, comprising An apparatus comprising: a first outer pipe; a central housing attached to the first outer pipe, an annular piston that can impact a brittle barrier, the annular piston comprising an impact surface; a brittle barrier, wherein the brittle barrier is separated from the impact surface by a distance, and wherein the brittle barrier comprises a set of materials; and a second outer pipe attached to the central housing, wherein the central housing is positioned between the first outer pipe and the second outer pipe; wherein the brittle barrier is positioned within one or more of the central housing and the second outer pipe; wherein the annular piston is attached to one or more of the first outer pipe and the central housing via a releasable fastener.

An apparatus for determining a location of an inner string in an outer string includes an axis parallel to a longitudinal axis of the inner string, and a tagging assembly disposed at a tagging location in the outer string, the outer string configured to be deployed into a borehole in a subterranean region, the inner string configured to be advanced through the outer string. The tagging assembly includes a stop component configured to obstruct axial movement of the inner string through the outer string at the tagging location, the stop component configured to be displaced in response to an axial force applied to the stop component by the inner string, to permit the inner string to advance axially beyond the tagging assembly.

A borehole tool can include a frangible degradable alloy that includes an oxidizable base element and at least one alloying element.

Provided is a packer plug. The packer plug, in this example, may include an engagement member having a no go feature configured to engage a no go shoulder of an associated packer assembly. The packer plug, in the example, further includes a nose cone having one or more nose cone openings coupled proximate a downhole end of the engagement member, and a check valve coupled proximate the engagement member. The check valve, engagement member, and nose cone, in this example, create a fluid path between a lower end and an upper end of the packer plug. Further to this example, the check valve is configured to allow downhole fluid to pass uphole through the fluid path as the packer plug is being pushed downhole, but substantially prevent uphole fluid from passing downhole through the fluid path as the packer plug is being pulled uphole.

A downhole tubular system including a tubular defining a wall having an inner radial surface and an outer radial surface, the outer radial surface having a circumferential channel formed therein extending 360 degrees defining a punch portion, the inner radial surface defining an inner bore; a sleeve attachable around the tubular; and at least a portion of a control fluid chamber passageway defined between the sleeve and the outer radial surface, the wall occluding fluidic communication between the control line passageway and the inner bore until the punch portion has been punctured.

A method for wellbore fluid flow control in which a frangible flapper is disposed in a wellbore. The frangible flapper is engaged to a flow tube disposed within the wellbore to keep the frangible flapper in a biased open position to allow fluid flow through the wellbore. The method includes moving the flow tube longitudinally in a first direction within the wellbore and relative to the frangible flapper. The method includes responsive to moving the flow tube longitudinally in the first direction, disengaging the flow tube from the frangible flapper. The method includes responsive to disengaging the flow tube from the frangible flapper, causing the frangible flapper to move from the biased open position to an unbiased shut position. The method includes responsive to the frangible flapper moving to the unbiased shut position, stopping fluid flow within the wellbore from a downhole location downhole of the frangible flapper.

A valve collar for a downhole packer includes a flow path. The flow path includes an opening valve and closing valve. The valve collar further includes a lockout valve piston. The lockout valve piston is positioned such that in an unset position, the flow path is open and in a set position, the flow path is blocked by the lockout valve piston. The lockout valve piston may be adapted to be shifted from the unset position to the set position by a pressure spike inside the valve collar. The lockout valve piston may be held in the unset position by a temporary restraint.

A tool to remove portions of casing from a wellbore. A tool may include a bottom sub-assembly and casing that selectively detach from a sub-assembly. This may allow for tools and casing within the wellbore to be efficiently and effectively removed from the wellbore without having to cut tools down well.

A buoyancy assist tool has an outer case with a rupture disk assembly connected therein. The buoyancy assist tool defines the upper end of a buoyancy chamber in a well casing. A sleeve in the outer case traps the rupture disk membrane after it has ruptured to provide full bore flow through the casing.