Abstract: Pneumatic tires include a tire body having a pair of tire sidewalls, a tread wall extending between the tire sidewalls and a tread portion on the tread wall. The tread portion may include alternating first and second tread patterns around the circumference of the tread wall. Each of the first and second tread patterns may have a main land protruding from the tread wall on a first side of a tread equator dividing the tread portion into equal first and second halves. A main land sidewall portion may extend from the main land and protruding from a first one of the pair of tire sidewalls. A stepped land may protrude from the tread wall on a second side of the tread equator. A stepped land sidewall portion may extend from the stepped land and protruding from a second one of the pair of tire sidewalls.

Abstract: Backup rings for a sealing element system for a downhole bridge plug assembly may include a circumferentially-expandable backup ring body having an engaging ring surface. A beveled ring surface may extend from the engaging ring surface. An interior ring surface may extend from the beveled ring surface to the engaging ring surface. A ring opening may be formed by the beveled ring surface. A plurality of spiral ring slots may extend through the backup ring body from the engaging ring surface to the beveled ring surface. A plurality of expandable ring portions may extend between the plurality of spiral ring slots. An at least partially circumferentially-expanding ring sleeve may extend from the backup ring body. In some embodiments, an outer width or diameter of the ring sleeve may correspond to an outer width or diameter of the backup ring body. The ring sleeve may include a ring sleeve wall extending from the interior ring surface of the backup ring body.

Abstract: Backup rings for a sealing element system for a downhole bridge plug assembly may include a circumferentially-expandable backup ring body having an engaging ring surface. A beveled ring surface may extend from the engaging ring surface. An interior ring surface may extend from the beveled ring surface to the engaging ring surface. A ring opening may be formed by the beveled ring surface. A plurality of spiral ring slots may extend through the backup ring body from the engaging ring surface to the beveled ring surface. A plurality of expandable ring portions may extend between the plurality of spiral ring slots. An at least partially circumferentially-expanding ring sleeve may extend from the backup ring body. In some embodiments, an outer width or diameter of the ring sleeve may correspond to an outer width or diameter of the backup ring body. The ring sleeve may include a ring sleeve wall extending from the interior ring surface of the backup ring body.

Abstract: Sealing element system for a downhole bridge plug assembly may include a packer mandrel. At least one sealing element may be carried by the packer mandrel. A first completion ring may be carried by the packer mandrel on a first side of the at least one sealing element. The first completion ring may have a first beveled outer completion ring surface. A second completion ring may be carried by the packer mandrel on a second side of the at least one sealing element. The second completion ring may have a second beveled outer completion ring surface. A first backup ring support may be carried by the packer mandrel proximate the first completion ring. A second backup ring support may be carried by the packer mandrel proximate the second completion ring. A first backup ring may be carried by the first backup ring support. The first backup ring may include a circumferentially-expandable first backup ring body. A first ring sleeve may extend from the first backup ring body.

Abstract: Sealing element system for a downhole bridge plug assembly may include a packer mandrel. At least one sealing element may be carried by the packer mandrel. A first completion ring may be carried by the packer mandrel on a first side of the at least one sealing element. The first completion ring may have a first beveled outer completion ring surface. A second completion ring may be carried by the packer mandrel on a second side of the at least one sealing element. The second completion ring may have a second beveled outer completion ring surface. A first backup ring support may be carried by the packer mandrel proximate the first completion ring. A second backup ring support may be carried by the packer mandrel proximate the second completion ring. A first backup ring may be carried by the first backup ring support. The first backup ring may include a circumferentially-expandable first backup ring body. A first ring sleeve may extend from the first backup ring body.

Abstract: Fluid-sealing downhole bridge plugs may include a pair of sealing rings which prevent flow of well fluid through the interface between a mandrel shaft of a mandrel and expansion elements of the downhole bridge plug. An illustrative embodiment of the fluid-sealing downhole bridge plugs includes a mandrel. At least one sealing element may be provided on the mandrel. A first backup ring may be provided on the mandrel on a first side of the at least one sealing element. A second backup ring may be provided on the mandrel on a second side of the at least one sealing element. A first gage ring may be provided on the mandrel in engaging relationship to the first backup ring. A second gage ring may be provided on the mandrel in engaging relationship to the second backup ring. A first ring space may be provided between the at least one sealing element and the first backup ring. A first seal ring may be provided in the first ring space.

Abstract: Downhole bridge plugs may include a mandrel; at least one sealing element provided on the mandrel; at least one backup ring provided on the mandrel on at least one side of the at least one scaling element; and a pair of pressure-applying elements provided on the mandrel on respective sides of the at least one sealing element and the at least one backup ring, respectively. Each of the pair of pressure-applying elements may include a cone and a slip assembly engaging the cone. The slip assembly may have a reinforcing ring which may include a ring wall, a plurality of ring ridges protruding from the ring wall and a plurality of ring grooves between the plurality of ring ridges. A mandrel cap may engage one of the pair of pressure-applying elements. Backup rings for downhole bridge plugs and methods of fabricating a reinforcing ring of a pressure-applying element for a downhole bridge plug are also disclosed.

Abstract: A drill string coupling and uncoupling method includes forming a well bore by conducting a drilling operation using a drill string having a first drill string segment and a second drill string segment detachably coupled to the first drill string segment; immobilizing the second drill string segment in the well bore; uncoupling the first drill string segment from the second drill string segment; at least partially retracting the first drill string segment in the well bore away from the second drill string segment; reinserting the first drill string segment in the well bore to the second drill string segment; and re-coupling the first drill string segment to the second drill string segment.

Abstract: Bridge plug or packer assemblies include a mandrel, at least one sealing element provided on the mandrel and a pair of backup rings provided on the mandrel on respective sides of the at least one sealing element. Each of the pair of backup rings including an annular backup ring body having a ring opening receiving the mandrel, a ring opening edge encircling and facing the ring opening, an engaging ring surface, an outer ring surface extending from the engaging ring surface to the ring opening edge, an inner ring surface extending from the engaging ring surface to the ring opening edge opposite the outer ring surface and a single spiraled ring groove in the backup ring body. A mandrel cap may be provided on the mandrel in engaging relationship to a second one of the pair of backup rings. A first shear-able ring retainer pin may couple the backup ring body of the first one of the pair of backup rings to the gauge ring.

Abstract: A bridge plug or packer assembly includes a mandrel. At least one sealing element is provided on the mandrel. A pair of backup rings is provided on the mandrel on respective sides of the at least one sealing element. Each of the pair of backup rings has a single spiraled ring groove. A pair of pressure-applying elements is provided on the mandrel on respective sides of the pair of backup rings, respectively.

Abstract: An on/off tool running and well completion method includes deploying a packer in a well bore; providing an assembly having an on/off tool and a tool spacer sleeve carried by the on/off tool; providing a tubing string; coupling the on/off tool of the assembly to the tubing string; inserting the assembly and the tubing string in the well bore; irrigating the packer by circulating packer fluid through the well bore, the assembly and the tubing string to clean the packer; determining a depth of the packer in the well bore; and latching the on/off tool of the assembly to the packer once.

Abstract: A differential pressure release sub includes a sub housing having a housing bore, a piston chamber communicating with the housing bore and at least one fluid port communicating with the piston chamber. A piston having a piston bore is disposed for axial displacement in the piston chamber from a first position wherein the at least one fluid port is fluidly sealed from the piston bore to a second position wherein the at least one fluid port is disposed in fluid communication with the piston bore. A first surface having a first surface area is on the piston. A second surface having a second surface area less than the first surface area of the first surface is on the piston.

Abstract: A flip top grill assembly includes an assembly base, a pair of linkage assemblies carried by the assembly base, a grill cage carried by the pair of linkage assemblies and positional between a first position and a second position inverted with respect to the first position and at least one handle operably engaging at least one of the pair of linkage assemblies and adapted to facilitate pivoting of the grill cage between the first position and the second position responsive to manipulation of the handle.

Abstract: A bridge plug or packer assembly includes a mandrel; at least one sealing element provided on the mandrel; a pair of backup rings each having a plurality of spiral ring grooves provided on the mandrel on respective sides of the at least one sealing element; and a pair of pressure-applying elements provided on the mandrel on respective sides of the pair of backup rings, respectively.