A plug system including: a plug tubular including a tubular body, an upstream tubular connection, and a downstream tubular connection; wherein: the upstream tubular connection and the downstream tubular connection are openings at opposite ends of the tubular body; and a plug assembly arranged in a housing including: a plug; a breaker object; and a seat; wherein: the plug is supported by the seat; the plug assembly has a first position and a second position; wherein in the first position, the plug intact; and in the second position the plug has been broken by the breaker object; wherein: the plug is stationary with respect to the housing in both the first and second position; there is a fluid connection between the upstream tubular connection and the downstream tubular connection: and the tubular body is a single continuous piece; and wherein the plug assembly is entirely arranged within the plug tubular.

A plug system including: a plug tubular including a tubular body, an upstream tubular connection, and a downstream tubular connection; wherein: the upstream tubular connection and the downstream tubular connection are openings at opposite ends of the tubular body; and a plug assembly arranged in a housing including: a plug; a breaker object; and a seat; wherein: the plug is supported by the seat; the plug assembly has a first position and a second position; wherein in the first position, the plug intact; and in the second position the plug has been broken by the breaker object; wherein: the plug is stationary with respect to the housing in both the first and second position; there is a fluid connection between the upstream tubular connection and the downstream tubular connection: and the tubular body is a single continuous piece; and wherein the plug assembly is entirely arranged within the plug tubular.

A bottom hole assembly comprising a downhole tool known as a cutting tool is provided for use within a subterranean well for severing tubulars. The cutting tool comprises a fluid source, a gas-driven rotatable motor and a cutting head including one or more cutters. The fluid source supplies pressurized fluid and thereby energy to the gas-driven rotatable motor which is disposed to generate thrust to set the gas-driven rotatable motor in motion. The cutting head is coupled to the gas-driven rotatable motor and rotates while cutting the tubular. The cutting tool can be deployed in a subterranean well by a variety of deployment methods, and the pressurized fluid may be supplied from a surface system, generated inside the cutting tool or bottom hole assembly, or input within the cutting tool or bottom hole assembly prior to deployment.

The invention further relates to associated methods.

A shaped charge assembly for selectively expanding a wall of a tubular includes a housing comprising an outer surface facing away from the housing and an opposing inner surface facing an interior of the housing. First and second explosive units each includes a predetermined amount of explosive sufficient to expand, without puncturing, at least a portion of the wall of the tubular to form a protrusion extending outward into an annulus adjacent the wall of the tubular.

A shaped charge assembly for selectively expanding a wall of a tubular includes a housing comprising an outer surface facing away from the housing and an opposing inner surface facing an interior of the housing. First and second explosive units each includes a predetermined amount of explosive sufficient to expand, without puncturing, at least a portion of the wall of the tubular to form a protrusion extending outward into an annulus adjacent the wall of the tubular.

A tumbler ring apparatus, method, and system for deployment in a subterranean well at a setting location. The tumbler ring may have a generally oval shape with a major axis and a minor axis. The major axis defining a major diameter of the ring and the minor axis defining a minor diameter of the ring. The major diameter of the ring being larger than the inner diameter of the subterranean well at the setting location, and the minor diameter of the ring being smaller than the inner diameter of the subterranean well at the setting location. The ring is further configured to substantially deform to the inner circumference of the subterranean well at the setting location when tumbled by reducing the major diameter of the ring to cause the ring to generally take the shape of the inner circumference of the subterranean well.

A tumbler ring apparatus, method, and system for deployment in a subterranean well at a setting location. The tumbler ring may have a generally oval shape with a major axis and a minor axis. The major axis defining a major diameter of the ring and the minor axis defining a minor diameter of the ring. The major diameter of the ring being larger than the inner diameter of the subterranean well at the setting location, and the minor diameter of the ring being smaller than the inner diameter of the subterranean well at the setting location. The ring is further configured to substantially deform to the inner circumference of the subterranean well at the setting location when tumbled by reducing the major diameter of the ring to cause the ring to generally take the shape of the inner circumference of the subterranean well.

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.

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.

A method, system, and apparatus for determining the location of a tool traveling down a wellbore by measuring a first borehole magnetic anomaly with respect to time at two known locations on a tool, comparing the time difference between the two measurements, then calculating the velocity of the tool based on the comparison, then further calculating the distance traveled by the tool in the wellbore based on the velocity calculation, then executing a series of commands at a predetermined location in the wellbore.