Large drift diameter high-low pressure distribution fracturing "-"-shaped manifold device

Abstract

The invention relates to a large drift diameter high-low pressure distribution fracturing "-"-shaped manifold device which comprises a high-pressure "-"-shaped manifold, a low-pressure "-"-shaped manifold, a fracturing unit and wellhead rotary reversing mechanisms. Two ends of the high-pressure "-"-shaped manifold are separately connected to the wellhead rotary reversing mechanisms through flangepup joints; the high-pressure "-"-shaped manifold is connected to the fracturing unit through a high-pressure fracturing fluid inlet pipeline; and the fracturing unit is connected to the low-pressure"-"-shaped manifold through a low-pressure fracturing fluid inlet pipeline. The wellhead reversing structures are straight pipe structures and can move a rotating shaft according to a wellhead position, and the straight pipe and the pup joint are consistent in drift diameter without a reducing structure in the middle, so that a large displacement and pressure stabilizing conveying operation can beensured, and therefore, erosion to the inner wall of the pipeline is reduced and assembly of bended joints and multiple unions is reduced. The device is simple in structure, high in reliability, convenient to mount, long in using time and high in using efficiency.

Description

technical field [0001] The invention relates to a large diameter high and low pressure distribution fracturing inline manifold device, in particular to a large diameter high and low pressure distribution fracturing inline manifold device. Background technique [0002] High-pressure manifolds are essential equipment in oilfield acid fracturing operations. As the depth of fracturing operations increases, the manifolds are subjected to higher and higher fracturing pressures, and their strength directly affects the safety of fracturing operations. . The pipe elbow is the place where erosion and fatigue damage are most likely to occur in the high-pressure manifold, and the inner wall outside the elbow is the most dangerous area. [0003] The damage to the high-pressure manifold elbow is caused by erosion fatigue. The damage to the surface of the manifold elbow by erosion is mainly caused by mechanical force, followed by corrosion factors. The proppant (ceramic sand) carried in ...

AI Technical Summary

Problems solved by technology

[0015] 1. The layout of the fracturing manifold is still in accordance with the conventional structure, including the assembly of elbow joints and multiple oil nonels, and it is still difficult to get rid of the disadvantages of early erosion of the manifold

[0016] 2. Long-term action will affect the stability of the structure. The pipeline connection is relatively complicated, and there are many defects in the large-flow fracturing construction, so it can only be used as a temporary conversion structure

[0017] 3. There are certain difficulties in installation and manufacture, and there are local elbow joints with small apertures, which have poor fluid flow performance and are not suitable for large-displacement fracturing applications

[0018] 4. When the high-pressure fracturing fluid flows in the branch pipe, erosion will occur. The flow in the high-pressure fluid trident pipe is not smooth, and the fracturing fluid cannot be transported stably for a long time. The fracturing head is fixed at a certain wellhead and cannot be reversed or moved.

[0019] 5. There are many oil tanks added and the diameter is small, which is not conducive to the transportation of large displacement fracturing fluid

The overall diameter is small, and it belongs to the fixed wing structure, which is not easy to replace and change the direction of the fluid

[0020] 6. In some manifold patents, during the local reversing process, the fluid in the pipeline still has erosion and local eddy currents, which increases the vibration of the pipeline and causes loosening of the pipeline joints, and the reversing diameter is small, which is not suitable for Conveying with large displacement

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