Abstract: A fitting for encasing an extended length of pipe comprising a plurality of segments jointed end-to-end to axially extend over the length of pipe, each of the segments being formed by a pair of mating semi-cylindrical sections, the pairs of mating sections having arcuate ends forming longitudinally extending opposed faces mating at a diametral plane, the longitudinal opposed faces being sealed together, the adjacent axial ends of the segments being circumferentially sealed together, ends of the fitting having internal seals arranged to contact and seal onto the exterior of the pipe whereby the space between said internal seals within said fitting is closed.

Abstract: A pipe fitting comprising three annular coaxial sections including a grip section, middle section, and a seal section, the grip section and seal section being separately fixed to the middle section, an annular array of grips in the grip section, an annular semi-rigid seal in the seal section, a hydraulic grip actuator in the housing for radially constricting the grips into gripping engagement with an exterior of a pipe extending into the housing, and a hydraulic seal actuator hydraulically and mechanically independent of the grip actuator, for forcing the seal radially into engagement with an exterior of the pipe, a first mechanical lock for maintaining the grips in contact with the pipe and a second mechanical lock maintaining the seal in contact with the pipe.

Abstract: A pipe repair fitting comprising a mating pair of generally semi-circular segments, each formed by an arcuate wall having arcuate ends, the segment walls carrying compressible seals for sealing two pairs of mating arcuate ends of the segments and sealing on the outer periphery of the pipe, at least one threaded hole in each arcuate wall end, a common bolt threaded into each of the threaded holes of each pair of mating arcuate ends and serving to sustain hoop forces in the fitting imposed by fluid leaking out of the pipe and contained by said seals.

Abstract: A pipe repair fitting comprising a mating pair of generally semi-circular segments, each formed by an arcuate wall having arcuate ends, the segment walls carrying compressible seals for sealing two pairs of mating arcuate ends of the segments and sealing on the outer periphery of the pipe, at least one threaded hole in each arcuate wall end, a common bolt threaded into each of the threaded holes of each pair of mating arcuate ends and serving to sustain hoop forces in the fitting imposed by fluid leaking out of the pipe and contained by said seals.

Abstract: A hot-tapping sleeve is provided for tapping a main pipe and attaching a branch pipe. The tapping sleeve includes a split sleeve having first and second sleeve members which together form a circular bore for receiving a portion of the main pipe. The first and second sleeve members each form approximately one half of the circular bore. A plurality of clamping members pass through associated holes in the first and second sleeve members to clamp the first and second sleeve members together with the main pipe therebetween. A side branch is attached to the first sleeve member which has an opening in fluid communication with the circular bore. A sheet type packing member is located around the opening and is only between the first sleeve member and the main pipe. A metal spray is located on the second sleeve within the circular bore and engages the main pipe for resisting axial displacement of the main pipe to permit tapping of the main pipe while the main pipe is under fluid pressure.

Abstract: A hydraulic gun for injecting sealant including an elongated barrel in which a floating piston separates a bore onto a material receiving chamber and a hydraulic fluid chamber. A manual hydraulic fluid pump assembly is mounted on the barrel in parallel juxtaposition. Mounting blocks serve to join the hydraulic pump assembly to the barrel and to provide support feet for the gun. The hydraulic pump is mounted on the barrel in a manner that permits the gun to be operated in a vertical orientation with continued supply of hydraulic fluid.

Abstract: A coupling assembly for mechanically coupling the plain end of a pipe, comprising a pair of standard forged flanges as basic components between which is disposed a wedge ring. One of the flanges is of the slip-on type and has associated with it a conical collet bore for receiving the wedge ring. When tension bolts assembled through the flanges are tightened the wedge ring is driven into the collet bore and tightly radially against the periphery of the pipe to thereby lock the coupling to the pipe.

Abstract: A pipe coupling assembly for plain end pipe of the type in which a packing ring is compressed in an internal groove by a thrust ring to squeeze it against the outer surface of the pipe and effect a seal therewith. The thrust ring is made of a plurality of accurate segments which can be economically produced and assembled in the coupling body. The segments are mechanically interlocked in the body by cooperation with other elements of the assembly to avoid separate retainer members. The segments have a configuration which avoids significant circumferential gaps in the packing compression face of the ring and reduces the necessary axial length of the groove.

Abstract: A method and apparatus for installing a split fitting on an intermediate point of a pipeline. The apparatus includes remotely-controlled, power-operated manipulator elements operable to close segments of the fitting about the pipeline in the manner of a clamshell. The manipulator elements include cam means to initially close the fitting segments and C-clamp means to effect full closure of the fitting segments.

Abstract: Apparatus adapted to be retrofitted on an existing live pipeline to plug off and isolate a section of the pipe while maintaining flow through an associated bypass circuit. The disclosed apparatus includes a housing to be secured around the pipe and elements operable in the housing to cut into the pipe and establish a closed flow path between one section of the pipe and the exterior of the housing while isolating such flow from a work chamber within the housing and remaining sections of the pipe.