Composite tube assemblies comprising a composite tube comprising a distal end having a first conical section and a second conical section, wherein a distal end of the first conical section is in contact with a proximal end of the second conical section having the same outer diameter as the distal end of the first conical section, wherein a proximal end of the first conical section and a distal end of the second conical section have a smaller outer diameter than the distal end of the first conical section, a locking ring disposed around the first conical section, an end fitting disposed around the second conical section, wherein the end fitting is coupled to the locking ring, and a retaining ring circumferentially disposed around the locking ring are disclosed.

Composite tube assemblies comprising a composite tube comprising a distal end having a first conical section and a second conical section, wherein a distal end of the first conical section is in contact with a proximal end of the second conical section having the same outer diameter as the distal end of the first conical section, wherein a proximal end of the first conical section and a distal end of the second conical section have a smaller outer diameter than the distal end of the first conical section, a locking ring disposed around the first conical section, an end fitting disposed around the second conical section, wherein the end fitting is coupled to the locking ring, and a retaining ring circumferentially disposed around the locking ring are disclosed.

A pumphead comprises a housing having a first end defining an aperture configured to receive a valve head therein; a handle housing defining an air passage in fluid connection with the aperture and an air pump; and a lock arm comprising an end pivotally coupled to the pumphead housing at the end of the pumphead housing opposite the aperture; and a second end disposed between the handle housing and the first end of the pumphead housing. Pivoting the lock arm toward the handle housing locks the pumphead housing around the valve head when the valve head is received in the aperture.

The disclosure presents systems and methods for hot swapping pumps at a wellsite while minimizing the impact to the pumping operations. As one pump is swapped out, such as for maintenance, the remaining pumps in the set of pumps at the wellsite can continue pumping operations. In some aspects, the swapping of pumps can be performed by a user using a protection barrier to isolate the pump location where the pumps will be swapped. In some aspects, one or more of the steps to swap pumps can be performed through automation thereby minimizing danger to a user. In some aspects, the pump being located at the pump system can be primed and pressure tested prior to be located to improve the time to enable the pump for pumping operations.

The disclosure presents systems and methods for hot swapping pumps at a wellsite while minimizing the impact to the pumping operations. As one pump is swapped out, such as for maintenance, the remaining pumps in the set of pumps at the wellsite can continue pumping operations. In some aspects, the swapping of pumps can be performed by a user using a protection barrier to isolate the pump location where the pumps will be swapped. In some aspects, one or more of the steps to swap pumps can be performed through automation thereby minimizing danger to a user. In some aspects, the pump being located at the pump system can be primed and pressure tested prior to be located to improve the time to enable the pump for pumping operations.

A coupling device is provided for mounting onto a faucet having an externally threaded portion terminating in a free end. The device includes a pair clam-shell shaped members pivotably connected to each other to form a housing enclosing a tubular connector member having a connector at one end for connection to a hose. A pair of opposed shoes, a washer and a pressure applying member are located within the housing. An actuator lever is coupled to the clam-shells to pivot them with respect to each other into various positions. In one position the shoes are brought into engagement with the externally threaded end portion to mount the coupling device on the faucet. In another position the pressure applying member moves the tubular connector member into engagement with the washer to compress the washer between it and the free end surface of the faucet to couple the faucet to it in a fluid-tight interface.

A coupling device is provided for mounting onto a faucet having an externally threaded portion terminating in a free end. The device includes a pair clam-shell shaped members pivotably connected to each other to form a housing enclosing a tubular connector member having a connector at one end for connection to a hose. A pair of opposed shoes, a washer and a pressure applying member are located within the housing. An actuator lever is coupled to the clam-shells to pivot them with respect to each other into various positions. In one position the shoes are brought into engagement with the externally threaded end portion to mount the coupling device on the faucet. In another position the pressure applying member moves the tubular connector member into engagement with the washer to compress the washer between it and the free end surface of the faucet to couple the faucet to it in a fluid-tight interface.

A fluid system coupler includes a coupler body having an open end for receiving an adaptor therein. A seal assembly is movably disposed within the coupler body for selective sealing engagement with an adaptor. Lever cams pivot into or out of slots in the coupler body between locked and unlocked positions to fasten or unfasten the adaptor to the coupler. A handle is movably connected to the coupler body. Movement of the handle moves the seal assembly within the coupler body. Movement of the handle also results in movement of the lever cams between the locked and unlocked positions. A poppet assembly is mounted to the seal assembly. The poppet assembly can selectively open or close a fluid passageway through the coupler.

A fluid system coupler includes a coupler body having an open end for receiving an adaptor therein. A seal assembly is movably disposed within the coupler body for selective sealing engagement with an adaptor. Lever cams pivot into or out of slots in the coupler body between locked and unlocked positions to fasten or unfasten the adaptor to the coupler. A handle is movably connected to the coupler body. Movement of the handle moves the seal assembly within the coupler body. Movement of the handle also results in movement of the lever cams between the locked and unlocked positions. A poppet assembly is mounted to the seal assembly. The poppet assembly can selectively open or close a fluid passageway through the coupler.

A system that permits fracturing pumps such as, for example, at least first and second fracturing pumps, each carried on a truck, to be connected to, and disconnected from, respective connection points on a fracturing manifold while fracturing fluid in the fracturing manifold is at pressure, in certain instances at or near fracturing pressure, and/or while other(s) of the fracturing pumps are being operated to pump fracturing fluid.