A plugging assembly includes a plug and a setting tool attached directly to the plug, wherein the plug includes an elongate core with an uphole end and a downhole end opposite the uphole end, a sealing element disposed fully around the core to seal against the casing, an anchoring system for anchoring the plug to the casing in a fixed position, a compression fitting disposed around the core at or near the uphole end of the core, a nose at the downhole end of the core, and the setting tool includes an elongate housing extending between an uphole end and a downhole end opposite the uphole end, an open passageway extending from the uphole end to the downhole end of the housing, and the downhole end of the housing is aligned to directly engage the compression fitting of the plug.

A cut-to-release packer can include a bottom sub, a wedge assembly, a mandrel, and a load diverting snap ring. The mandrel extends within the wedge assembly. The mandrel can include a support portion with a first cross-sectional thickness and a cut zone portion with a second cross-sectional thickness less than the first cross-sectional thickness, wherein the cut zone portion is disposed between the bottom sub and the support portion. Both the mandrel and the wedge assembly can be coupled to the bottom sub. The load diverting snap ring can be engaged with the mandrel along the support portion, wherein the load diverting snap ring facilitates transfer of tensile load between the wedge assembly and the support portion of the mandrel.

The retrievable packer system includes a packer mandrel, a lock ring, an upper cone, a lower cone, a slip device, a retrieval mandrel, and a plurality of push rods. The lock ring is attached to the packer mandrel, followed by the upper cone, the slip device, the lower cone, and the retrieval mandrel. The lower cone has lower cone rod channels, and the push rods anchored on the retrieval mandrel slide through respective channels toward the upper cone. The packer system is run into the borehole with each rod in the first position relative to a tip end of the lower cone and the slip device in the run-in position. The packer system is set and can be locked at a location in the borehole. Each push rod can push the upper cone to return the slip device to the run-in position for retrieval of the packer system.

A slip assembly comprises a plurality of slips provided over a mandrel of a downhole tool, at least one generally cylindrical cone body slidably provided over the mandrel, and at least one biasing member coaxially provided over the mandrel and adapted to apply an axial force against the cylindrical body to maintain the slips in a radially extended position when the tool is set.

A retrievable setting tool includes a collapsible expansion punch formed by sections. Each section includes an external surface that forms a portion of an expansion face of the collapsible expansion punch. Some sections are capable of sliding relative to other sections. As such, the overall shape of the expansion face may be continuous or discontinuous. The retrievable setting tool could be inside a wellbore to set an expandable member, such as a plug assembly, a patch, a liner hanger, or a packer.

A plug assembly includes an expandable assembly and a locking ring. The expandable assembly is adapted to be deformed radially over the locking ring. The plug assembly is used with an untethered object, which is adapted to contact an inside surface of the plug assembly and, using well fluid pressure, to apply forces to the plug assembly. The forces cause further radial deformation of the expandable assembly, and penetration of an internal surface of the tubing string at least at one point with a gripping portion of the expandable assembly.

A self-destructible frac ball is described herein. The self-destructible frac ball is configured to seal a hydraulic flow path through a fluid conduit of a frac plug when engaged on a ball seat of the frac plug. The self-destructible frac ball includes an activation mechanism configured to activate a destructive medium in response to the satisfaction of at least one predetermined condition. The self-destructible frac ball also includes the destructive medium, which is configured to destroy the self-destructible frac ball and a corresponding destructible ball retainer when activated by the activation mechanism. The destruction of the self-destructible frac ball and the corresponding destructible ball retainer reestablishes the hydraulic flow path through the fluid conduit of the frac plug.

A downhole tool having a mandrel and a slip. The mandrel has a mandrel body having a proximate end; a distal end; and an outer surface. The slip has a slip body; and an outer slip surface. The outer slip surface is configured with an insert bore, and an insert disposed therein. The insert has an outward most insert face that includes a hole.

A cut-to-release packer can include a bottom sub, a wedge assembly, a mandrel, and a load diverting snap ring. The mandrel extends within the wedge assembly. The mandrel can include a support portion with a first cross-sectional thickness and a cut zone portion with a second cross-sectional thickness less than the first cross-sectional thickness, wherein the cut zone portion is disposed between the bottom sub and the support portion. Both the mandrel and the wedge assembly can be coupled to the bottom sub. The load diverting snap ring can be engaged with the mandrel along the support portion, wherein the load diverting snap ring facilitates transfer of tensile load between the wedge assembly and the support portion of the mandrel

A downhole coupling mechanism for use in downhole tools that find application in wells exploited by a hydraulic refracturing process. The downhole coupling mechanism connects first and second tubular sections via a tensile load arrangement of wires located in complimentary grooves, a torque arrangement of interlocking lugs and notches on opposite ends, and a seal arrangement. The downhole coupling mechanism provides a thin walled coupling where a screw-threaded connection could not achieve the required tensile load, torque and sealing properties needed. Embodiments of a thin walled anchor and packer including the downhole coupling mechanism are described.