Anti-erosion system based on hydraulic jet fracturing anti-vortex erosion valve

Abstract

The invention relates to an oilfield device and in particular relates to an anti-erosion system based on a hydraulic jet fracturing anti-vortex erosion valve, and the system provided by the invention can be used for improving the seepage capability of a near-wellbore zone. The anti-erosion system comprises an oil pipe, wherein a hydraulic ejector, a packer and a check valve are sequentially arranged in the oil pipe, and the anti-erosion system is characterized in that the upper end of the hydraulic ejector is connected with a first anti-erosion pipe, the lower end of the hydraulic ejector is connected with a second anti-erosion pipe, the lower end of the second anti-erosion pipe is connected with the anti-vortex erosion valve, and the lower end of the anti-vortex erosion valve is sequentially connected with the packer and the check valve; a wear-resistant material is coated in the first anti-erosion pipe and the second anti-erosion pipe; the first anti-erosion pipe and the second anti-erosion pipe are oil pipe pup joints made of P110 steel; and the length of each of the first anti-erosion pipe and the second anti-erosion pipe is 1 to 2m. The invention provides the jet fracturing anti-vortex erosion valve and the anti-erosion system which are applicable to great flow rate of sand fluid, not affected by the direction of fluid flow, strong in anti-erosion capability and good in process property.

Description

technical field [0001] The invention relates to oilfield equipment, in particular to an anti-erosion system based on a hydraulic jet fracturing anti-vortex erosion valve which improves the seepage capacity of the near-well zone. Background technique [0002] Hydraulic jet layered fracturing technology is a new fracturing and acidizing technology developed at home and abroad in recent years. Its main advantage is that it combines sandblasting perforation and hydraulic fracturing technology organically to avoid perforation. The pollution caused by the ejection hole to the formation reduces the construction process; during construction, the sand liquid is sprayed to the layer where the wellbore has been shot at a high flow rate under a certain throttling pressure, eroding and expanding the construction hole, and With a certain depth, it has a great effect on improving the seepage capacity of the near-wellbore zone, and its construction effect is more significant than that of co...

AI Technical Summary

Problems solved by technology

[0007] 3. The steel grade of conventional construction tubing is N-80, and its erosion resistance is not strong, so it can only meet the conventional hydraulic fracturing construction

[0008] 4. The shell of the packer is also made of 45 structural steel, and its erosion resistance is poor; its main body is made of rubber, and its erosion resistance is even worse

[0009] Therefore, a technology is needed to solve the problem of hydraulic erosion of the pipe section from the hydraulic spray gun to the packer during hydraulic jet fracturing construction, so as to ensure the safety of hydraulic jet fracturing construction

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