A pipeline telescopic joint configured to compensate for dimensional changes has: a first pipe section having a first diameter; a second pipe section having a second diameter smaller than the first diameter is slidingly coupled to the first pipe section; an end assembly, which is fixed to the second pipe section an annular seat bounded by two facing cylindrical faces; and an annular gasket, which is housed within the annular seat and has a polymeric casing and a spring housed within the polymeric casing, wherein the polymeric casing is in contact with the cylindrical faces.

A fracturing system can include a fracturing manifold coupled to a plurality of fracturing trees. The fracturing manifold may include adjustment joints that enable adjustment of the length of the fracturing manifold. The fracturing manifold can also include pivot joints that allow angular displacement of portions of the fracturing manifold with respect to other portions. The adjustment and pivot joints can accommodate spacing and elevation differences between the fracturing trees.

A telescoping fluid coupling (10,110) is provided for use with a fluid flow device (12) and includes a coupling body (14,114) having a fluid port (16,116) extending along a longitudinal axis (18,118). A retainer (20,120) is fixed to the body (14,114) and includes a retaining shoulder (26,126). A flange (22,122) is mounted to the fluid port (16,116) and includes a radially inwardly facing guide surface (36,136) that surrounds a mount surface (24,124) and extends longitudinally along the axis (18,118) to provide guided, sliding translation of the guide surface (36,136) relative to the mount surface (24,124) along the axis (18,118). The flange (22,122) further includes a stop shoulder (38,138) to engage the retaining shoulder (26,126) to limit the translation of the flange (22,122) along the axis (18,128).

A fracturing system is provided. In one embodiment, the fracturing system includes a fracturing manifold for routing fracturing fluid to multiple wells. The fracturing manifold can be coupled via fluid conduits to fracturing trees installed at the wells. In some cases, each fracturing tree that is coupled to the fracturing manifold is coupled by at least one rigid fluid conduit. The fracturing manifold can include a trunk line that provides fracturing fluid to multiple outlet branches, which can include valves for controlling flow of fracturing fluid to wells downstream of the valves. Additional systems, devices, and methods are also disclosed.

A pipe connection compensation device by magnetic fluid sealing comprising a compensation pipe, sealed end cap, coil, annular permanent magnet and tightening rod is provided, designed and configured in a novel manner to ensure the pipe connection compensation device by magnetic fluid sealing achieves a better sealing effect.

An assembly for an adjustable expansion spool that accommodates various lengths of pipe and can be adjusted in the field to a customized length to connect two pipes. One embodiment of the adjustable expansion spool has a main body that has one end inserted into a first connection box and a second end inserted into a second connection box. Both the first connection box and the second connection box can be capable of being coupled to a first flange and a second flange respectively. Both flanges encircle the main body and have an annular groove. Housed between the flanges and a ring groove on the main body is a ring. By adjusting the length between the second flange and a peripheral flange on the second connection box, the adjustable expansion spool can be expanded or contracted, depending on the needs of the user on site in the field.

An elbow-equipped expansion joint, even when there is an axial and lateral displacement between a first pipe and a second pipe, can absorb the displacement and connect the first pipe and the second pipe. The elbow-equipped expansion joint includes: an expandable joint including a first sleeve and a second sleeve; and a pair of rotatable elbows joined to both ends of the expandable joint. The elbows each include one elbow pipe, and the other elbow pipe rotatably joined to the one elbow pipe. The bend angle of each elbow can be changed by rotating the other elbow pipe.

An adjustable flow line may include an outer pipe body having a first flange, an inner pipe body partially disposed within the outer pipe body and axially translatable with respect to the outer pipe body, a metal seal positioned between an outer surface of inner pipe body and an inner surface of the outer pipe body, a sleeve positioned around the inner pipe body and outside of the outer pipe body, and a second flange positioned around the inner pipe body, wherein when connected to the first flange. The sleeve may be axially translatable with respect to the inner pipe body. The second flange may axially secure the sleeve with respect to the outer pipe body and cause the sleeve to energize the metal seal.

The invention comprises an expansion spool in which a pipe connected between two mounting pieces of the spool is cut to one of a plurality of suitable lengths for mounting between an open gap in a pipeline to create a stable fluid connection. The pipe has disposed therein a plurality of spaced and shaped grooves in which to insert a shaped split ring. A separate flange mounted over each shaped split ring imposes compressive but not shear forces on the shaped split ring. One mount has disposed therein a recess to permit variable insertion depths of the pipe so as to permit the spool to span variable gap lengths. The mounts, clamps, split rings and pipe combine to create an expansion spool suitable for low pressure and high-pressure pipelines.

A fracturing system can include a fracturing manifold coupled to a plurality of fracturing trees. The fracturing manifold may include adjustment joints that enable adjustment of the length of the fracturing manifold. The fracturing manifold can also include pivot joints that allow angular displacement of portions of the fracturing manifold with respect to other portions. The adjustment and pivot joints can accommodate spacing and elevation differences between the fracturing trees.