Abstract: A multistage cementing assembly is used for cementing casing in a borehole. A subsurface tool on the casing holds a subsurface plug therein using a temporary retainer. The subsurface plug is located in a subsurface location below one or more stage tools or cementing collars on the casing. First stage cement passing down the casing can pass through a passage of the subsurface plug to flow out of a float valve. A wiper plug passed through the casing behind the cement is then engaged with the subsurface plug. Pressure buildup can release the two plugs as a unit from the temporary retainer. Before reaching the float valve, a deformable ring on the subsurface plug can engage in a locator ring on the casing to indicate the plug unit's location during operations. Eventually, additional stages can be cemented using the one or more stage tools uphole on the casing.

Abstract: A method for assembling a reinforced non-compressible pipe support by inserting a plurality of generally cylindrical holes in a first sheet of insulation in a pre-determined pattern, inserting a similar group of holes in at least a second sheet of insulation so that the holes of both sheets line up when the first sheet is placed against a pre-determined cylindrical or flat form and the second sheet is placed on top of the first sheet thereby forming contiguous voids where mating holes are positioned adjacent each other, applying a pressurized flowable material to fill each void along its longitudinal axis, and curing the material until it forms a hardened material thereby forming the plurality of sheets into a non-compressible arcuate body having an inner radius of curvature that fits against a pipe or into a rectilinear block. Multiples sheets may be adhered and thermoplastic or resin used to fuse them together.

Abstract: A method for assembling a reinforced non-compressible pipe support by inserting a plurality of generally cylindrical holes in a first sheet of insulation in a pre-determined pattern, inserting a similar group of holes in at least a second sheet of insulation so that the holes of both sheets line up when the first sheet is placed against a pre-determined cylindrical or flat form and the second sheet is placed on top of the first sheet thereby forming contiguous voids where mating holes are positioned adjacent each other, applying a pressurized flowable material to fill each void along its longitudinal axis, and curing the material until it forms a hardened material thereby forming the plurality of sheets into a non-compressible arcuate body having an inner radius of curvature that fits against a pipe or into a rectilinear block. Multiples sheets may be adhered and thermoplastic or resin used to fuse them together.

Abstract: A reinforced insulation material having one or more sheets of insulation material having a plurality of voids in each sheet, wherein the sheets are operably connected to each other in a layered configuration, the voids mate to each other to create cylindrical or rectilinear pathways for insertion of adhesive or synthetic material to adhere the sheets into a layered or sandwiched configuration. The voids may be a variety of shapes including circles, squares, rectangles or other suitable shapes that upon formation of the layered sheets line up to permit insertion of material or dowels to create a reinforced assembly. The layers may be formed into a variety of shapes including a semicircular shape to go around a pipe, or a block of material. The finished assembly withstands compressive forces and provides insulation when in place around pipes or under tanks.

Abstract: A setting tool for hanging a tubular string includes: a tubular mandrel having an actuation port formed through a wall thereof; a debris barrier for engaging an upper end of the tubular string; and a piston having an upper face in fluid communication with the actuation port. The setting tool further includes: an actuator sleeve extending along the mandrel and connected to the piston; a latch releasably connecting the debris barrier to the actuator sleeve and for releasably connecting the debris barrier to the tubular string; a packoff connected to the mandrel below the piston and operable to seal against an inner surface of the tubular string, thereby forming a buffer chamber between the debris barrier and the packoff; and a passage. The passage: is in fluid communication with a lower face of the piston, is formed in a wall of and along the mandrel, and bypasses the packoff.

Abstract: A setting tool for hanging a tubular string includes: a tubular mandrel having an actuation port formed through a wall thereof; a debris barrier for engaging an upper end of the tubular string; and a piston having an upper face in fluid communication with the actuation port. The setting tool further includes: an actuator sleeve extending along the mandrel and connected to the piston; a latch releasably connecting the debris barrier to the actuator sleeve and for releasably connecting the debris barrier to the tubular string; a packoff connected to the mandrel below the piston and operable to seal against an inner surface of the tubular string, thereby forming a buffer chamber between the debris barrier and the packoff; and a passage. The passage: is in fluid communication with a lower face of the piston, is formed in a wall of and along the mandrel, and bypasses the packoff.

Abstract: A reinforced insulation material having one or more sheets of insulation material having a plurality of voids in each sheet, wherein the sheets are operably connected to each other in a layered configuration, the voids mate to each other to create cylindrical or rectilinear pathways for insertion of adhesive or synthetic material to adhere the sheets into a layered or sandwiched configuration. The voids may be a variety of shapes including circles, squares, rectangles or other suitable shapes that upon formation of the layered sheets line up to permit insertion of material or dowels to create a reinforced assembly. The layers may be formed into a variety of shapes including a semicircular shape to go around a pipe, or a block of material. The finished assembly withstands compressive forces and provides insulation when in place around pipes or under tanks.