Abstract: A downhole apparatus for use in a tubular include a mandrel, a first slip, a cone, and a seal element. The mandrel, which can be permanent or temporary, has a first end shoulder. The first slip is disposed on the mandrel adjacent the first end shoulder, and the cone is disposed on the mandrel adjacent the first slip. The cone is movable relative to the first end shoulder to engage the first slip toward the tubular. The seal element is disposed on the mandrel adjacent the cone. At least a portion of the seal element is composed of a dissolvable metallic material and is expandable outward from the mandrel. The expanded portion of the seal element forms a metal seal against the tubular and seals off fluid communication in the annular space between the seal element and the tubular.

Abstract: A bottom hole assembly having a packing element, a lower cone disposed below the packing element, and a lower slip disposed below the packing element. The bottom hole assembly also includes a setting tool removably attached to the plug, the setting tool having a mandrel and a setting sleeve connected to the mandrel. Also, a method for sealing a well including disposing a bottom hole assembly having a plug and a removable setting tool in a well. The method further includes applying pressure to a setting sleeve, contacting an inner diameter of the well with a lower slip, locking the lower slip against an inner diameter of the well, shearing a shear mechanism, disconnecting the removable setting tool from the well, dropping a ball into the well, contacting the ball with the packing element, and separating the well into at least two sections.

Abstract: A plug is engageable with a ball for seating in a tubular having an internal profile. The plug's body has a bore with a seat. Blocks disposed on the body are temporarily held in a retracted condition, but the blocks are biased outward to an expanded condition for engaging inside the tubular. The plug sets in the tubular with the blocks released from the retracted condition to the expanded condition. With the ball dropped downhole, the seat engages the ball so that fluid pressure is sealed from uphole to downhole through the bore. With applied fluid pressure against the seated ball, the plug can move through the tubular until the blocks seat in the internal profile of the tubing, sliding sleeve, or other component. A seal on the plug can then seal inside the tubular while the blocks seat in the profile and applied pressure pushes on the seated ball on the plug's mandrel.

Abstract: A downhole apparatus for use in a tubular include a mandrel, a first slip, a cone, and a seal element. The mandrel, which can be permanent or temporary, has a first end shoulder. The first slip is disposed on the mandrel adjacent the first end shoulder, and the cone is disposed on the mandrel adjacent the first slip. The cone is movable relative to the first end shoulder to engage the first slip toward the tubular. The seal element is disposed on the mandrel adjacent the cone. At least a portion of the seal element is composed of a dissolvable metallic material and is expandable outward from the mandrel. The expanded portion of the seal element forms a metal seal against the tubular and seals off fluid communication in the annular space between the seal element and the tubular.

Abstract: A bottom hole assembly having a packing element, a lower cone disposed below the packing element, and a lower slip disposed below the packing element. The bottom hole assembly also includes a setting tool removably attached to the plug, the setting tool having a mandrel and a setting sleeve connected to the mandrel. Also, a method for sealing a well including disposing a bottom hole assembly having a plug and a removable setting tool in a well. The method further includes applying pressure to a setting sleeve, contacting an inner diameter of the well with a lower slip, locking the lower slip against an inner diameter of the well, shearing a shear mechanism, disconnecting the removable setting tool from the well, dropping a ball into the well, contacting the ball with the packing element, and separating the well into at least two sections.

Abstract: A torsionally compliant sprocket system includes a first sprocket (250); a second sprocket (230) mounted in side-by-side relation to the first sprocket (250); a resilient member (270) that resiliently couples the second sprocket (230) to the first sprocket (250) to allow limited angular rotation of the second sprocket (230) with respect to the first sprocket (250); and a locking structure (300, 600, 700) that is biased toward an engaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is restrained and moves in response to rotation of the first sprocket (250) to a disengaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is permitted.

Abstract: A torsionally compliant sprocket system includes a first sprocket (250); a second sprocket (230) mounted in side-by-side relation to the first sprocket (250); a resilient member (270) that resiliently couples the second sprocket (230) to the first sprocket (250) to allow limited angular rotation of the second sprocket (230) with respect to the first sprocket (250); and a locking structure (300, 600, 700) that is biased toward an engaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is restrained and moves in response to rotation of the first sprocket (250) to a disengaged position in which angular motion of the second sprocket (230) with respect to the first sprocket (250) is permitted.

Abstract: A downhole apparatus for use in a tubular include a mandrel, a first slip, a cone, and a seal element. The mandrel, which can be permanent or temporary, has a first end shoulder. The first slip is disposed on the mandrel adjacent the first end shoulder, and the cone is disposed on the mandrel adjacent the first slip. The cone is movable relative to the first end shoulder to engage the first slip toward the tubular. The seal element is disposed on the mandrel adjacent the cone. At least a portion of the seal element is composed of a dissolvable metallic material and is expandable outward from the mandrel. The expanded portion of the seal element forms a metal seal against the tubular and seals off fluid communication in the annular space between the seal element and the tubular.

Abstract: A plug is engageable with a ball for seating in a tubular having an internal profile. The plug has a body with a bore with a seat. One or more blocks disposed on the body are temporarily held in a retracted condition, but the one or more blocks are biased outward to an expanded condition for engaging inside the tubular. A seal is disposed on the body for sealing inside the tubular. The plug sets in the tubular with the one or more blocks released from the retracted condition to the expanded condition. With the ball dropped downhole, the seat engages the ball so that fluid pressure is sealed from uphole to downhole through the bore. With applied fluid pressure against the seated ball, the plug can move through the tubular until the blocks seat in the internal profile of the tubing, sliding sleeve, or other component. The seal on the plug can then seal inside the tubular while the blocks seat in the profile and applied pressure pushes on the seated ball on the plug's mandrel.