A coupling for a tube includes an attachment and a housing. The attachment is attached to the tube and has a barrel-shaped exterior surface. The housing contains the barrel-shaped exterior surface such that the attachment is rotatable in the housing while not being removable from the housing. The coupling thereby allows easy rotation of the tube within the coupling. The coupling may be utilized to attach the tube to another tube or to another structure.

An apparatus having a flexible conduit which includes a flexible member and a rigid member in fluid communication with the flexible member, and a releasable connector. The releasable connector has a first member and a second member. When a releasing force is applied to the flexible conduit, the releasable connector separates. The apparatus also includes a shock absorber to configured to absorb a load when the releasable connector separates. The shock absorber may include elastomeric pads between rigid plates, a rotary dampener, a spring, rod and piston, or an elastic strap.

Aspects of the disclosure relate to fluid injection systems, apparatus, methods, and associated components thereof that include flexible hoses for wellhead sites. In one implementation, a fluid injection system for wellhead sites includes a platform, a pump manifold mounted to the platform, and a pair of rails mounted to the platform. The fluid injection system includes a trolley disposed between the pair of rails and above the pump manifold. The trolley is movable along the pair of rails. The fluid injection system includes an articulation arm device mounted to the trolley. The articulation arm device includes one or more pivot joints coupled between two or more arms, and a connection device coupled to an end arm of the two or more arms.

An apparatus having a flexible conduit which includes a flexible member and a rigid member in fluid communication with the flexible member, and a releasable connector. The releasable connector has a first member and a second member. When a releasing force is applied to the flexible conduit, the releasable connector separates. The apparatus also includes a shock absorber to configured to absorb a load when the releasable connector separates. The shock absorber may include elastomeric pads between rigid plates, a rotary dampener, a spring, rod and piston, or an elastic strap.

A fracturing fluid delivery system is provided. In one embodiment, the system includes a wellhead assembly, a fracturing fluid supply line, a vertical branch extending upward from the fracturing fluid supply line, and a fluid conduit coupling the vertical branch in fluid communication with the wellhead assembly. The fluid conduit may extend linearly from the vertical branch to the wellhead assembly. Additional systems, devices, and methods are also disclosed.

A fracturing fluid delivery system is provided. In one embodiment, the system includes a fracturing manifold and a fracturing tree. A fluid conduit is coupled between the fracturing manifold and the fracturing tree to enable receipt of fracturing fluid by the fracturing tree from the fracturing manifold through the fluid conduit. Further, the fluid conduit is an adjustable fluid conduit that provides a line-of-sight fluid connection from the fracturing manifold to the fracturing tree. Additional systems, devices, and methods are also disclosed.

A system for connecting and sealing flexible and rigid pipes under high pressure comprises a flexible pipe, rigid pipes, and transition connectors, wherein two ends of each transition connector are respectively connected with the flexible pipe and one rigid pipe, external sides of the flexible pipe and the transition connectors are coated with a rubber layer, buckling sleeves are buckled on the rubber layer outside the transition connectors, aluminum alloy connectors are embedded into external surfaces, extending out of the rubber layer, of the transition connectors, and external buckling sleeves are buckled on external surfaces of the aluminum alloy connectors.

Aspects of the disclosure relate to fluid injection systems, apparatus, methods, and associated components thereof that include flexible hoses for wellhead sites. In one implementation, a fluid injection system for wellhead sites includes a platform, a pump manifold mounted to the platform, and a pair of rails mounted to the platform. The fluid injection system includes a trolley disposed between the pair of rails and above the pump manifold. The trolley is movable along the pair of rails. The fluid injection system includes an articulation arm device mounted to the trolley. The articulation arm device includes one or more pivot joints coupled between two or more arms, and a connection device coupled to an end arm of the two or more arms.

Aspects of the disclosure relate to fluid injection systems, apparatus, methods, and associated components thereof that include flexible hoses for wellhead sites. In one implementation, a fluid injection system for wellhead sites includes a pump, a pump manifold, and a flexible hose coupled between the pump and the pump manifold. The flexible hose includes a first end coupled to the pump and a second end coupled to the pump manifold. The first end of the flexible hose includes a first end fitting coupled to the pump, and the first end fitting is oriented at an angle relative to a horizontal plane. The second end of the flexible hose includes a second end fitting coupled to the pump manifold, and the second end fitting is oriented vertically and perpendicularly to the horizontal plane.

A gas pipe joint contains: a connection pipe, a first threaded pipe, and a second threaded pipe. The connection pipe includes a first part and a second part, the first part has a first threaded orifice, and the second part has a second threaded orifice. The first threaded pipe includes a first coupling section, a first nut section, and a second coupling section. The second threaded pipe includes a second nut section and a third coupling section, the second nut section has a second screwing portion, and the third coupling section has at least one second recessed portion and a second groove. The third coupling section has a second shoulder. The second shoulder has a second lower gasket. The first groove has two first loops, and the second groove has two second loops.