Fracturing manifold quick connecting device

Abstract

The invention discloses a fracturing manifold quick connecting device. A first movable elbow, a linear pipe, a second movable elbow, a plug valve and a check valve are connected in sequence. A supportis fixedly connected with the second movable elbow. One end of an oil cylinder is connected with the linear pipe. The other end of the oil cylinder is connected with the support. The oil cylinder candrive the linear pipe to rotate around the second movable elbow. A control unit controls the oil cylinder through a hydraulic system, and accordingly, rotation of the linear pipe is controlled. The fracturing manifold quick connecting device has the beneficial effects that a one-way valve enables one-way flowing of fracturing fluid from fracturing equipment to a manifold package to be achieved, the situation that reflux of the fracturing fluid damages the fracturing equipment is avoided, the one-way valve can further gather fluctuation caused by a pressure difference to the position where thequick connecting device is connected with the manifold package, vibration of the whole quick connecting device is reduced, and the service life is prolonged; the plug valve achieves on-off of drainage of the single fracturing equipment, and the maintenance cost is lowered; and the hydraulic system achieves automatic adjustment of the quick connecting device, no manual uplifting or pressing is needed, the control unit enables remote control to be achieved, time and labor are saved, and the manual operation difficulty is lowered.

Description

technical field [0001] The invention relates to the technical field of fracturing, in particular to a quick-connecting device for a fracturing manifold. Background technique [0002] When the fracturing equipment is in operation, the high-pressure fracturing fluid pumped out by the fracturing equipment is first delivered to the manifold skid, and then the fracturing fluid is delivered through the manifold skid. The high-pressure manifold of each fracturing equipment needs to be connected to the manifold skid through a connecting device. The traditional connecting device usually needs to connect five to six connectors, and assemble high-pressure swivel elbows or straight pipes piece by piece. The assembly is difficult and the adaptability is poor. Moreover, at least three operators are required to manually move the heavy pipe fittings during the connection, which takes a long time, has low operating efficiency and poses a great safety risk. Although there have been quick-con...

AI Technical Summary

Problems solved by technology

The high-pressure manifold of each fracturing equipment needs to be connected to the manifold skid through the connecting device. The traditional connecting device usually needs to connect five to six connectors, and assemble high-pressure swivel elbows or straight pipes piece by piece. The assembly is difficult and the adaptability is poor. Moreover, at least three operators are required to manually move the heavy pipe fittings during the connection, which takes a long time, has low operating efficiency and poses a great safety risk

Although there have been quick-connecting devices for manifolds on the market at present, the movable arm of the manifold can be swung up and down through the hydraulic power assist system, which saves manpower and improves the operation efficiency. The fracturing manifold skid is often equipped with multiple high-pressure suction ports, and each suction port is connected through a high-pressure manifold, so each suction port needs to be connected to the fracturing equipment with a quick-connect device, and after the connection is completed will start working at the same time

This will lead to a very high pressure in the connecting pipe, which will easily cause the pressure of the fracturing fluid in the connecting header to exceed the pressure of the fracturing equipment, and then cause the reverse flow of the fracturing fluid, which will cause irreversible damage to the fracturing equipment and cause big security risk

At the same time, if one of the fracturing equipment fails, it is necessary to disconnect the high-pressure suction port from the fracturing equipment for maintenance. The current quick-connect device cannot realize the disconnection and maintenance of a single fracturing equipment. Once a failure occurs, the entire well site must Fracking work shut down for repairs, costly repairs

Moreover, when the existing quick-connect device realizes the rotation of the movable arm of the manifold, the movable arm of the manifold must be manually lifted or pressed down to break the balance of the hydraulic cylinder, so as to realize the hydraulic power assist function, although it can save manpower, but Multiple staff are still required for on-site operations, and the operating costs are high

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