Anti-back-splash sand blasting perforator

Abstract

The invention relates to an anti-back-splash sand blasting perforator, which comprises a body and a nozzle, wherein a groove is formed in the outer wall of the body; an installation hole is formed in the middle of the groove; the side wall of the groove is inclined; the nozzle is installed in the installation hole; the outer end of the nozzle stretches out from the bottom surface of the groove. The anti-back-splash sand blasting perforator is simple in structure, less in parts, and easy to process and assemble; through the arranged groove and a bulge on the outer end of the nozzle, a flow guide structure is formed around the nozzle, so that back-splash liquid can be timely and uniformly flown when back splashing on the perforator, can be prevented from forming vortex in the groove, and can be prevented from flowing in the groove for a long time; the erosion of the back-splash liquid on the perforator is reduced, and the service life of the perforator is improved.

Description

technical field [0001] The invention relates to an oil and gas field operating equipment, in particular to an anti-backsplash sandblasting perforator. Background technique [0002] Perforation operation is a conventional operation method to establish a channel between the casing and the reservoir, and hydraulic sandblasting perforation is a commonly used method for oil and gas well stimulation measures in perforation operation. During the perforation process, high-pressure perforation fluid passes through The perforating gun becomes a high-speed jet, and the pressure energy is converted into kinetic energy, which shoots through the casing, cement sheath and formation near the wellbore, and first establishes a flow channel between the wellbore and the reservoir. During the perforation process, when the high-speed jet is sprayed into the casing and the formation, it will splash back to the perforator and the surface of the nozzle on the perforator, eroding scars on the perfora...

AI Technical Summary

Problems solved by technology

The covering part increases the number of parts of the perforating device, which increases the manufacturing difficulty and cost of the perforating device. In order to make it not hinder the water jet, it is necessary to set water spray holes on its surface, and the setting of the water spray holes and the covering parts Installation increases the number of connection gaps between parts, increases the difficulty of sealing the water spray holes, and makes the structure of the perforator more complicated, which is not conducive to installation and maintenance

The coating only solves the temporary problem, but its life is limited. When the perforator is used for a period of time, the coating will be completely eroded by backsplash, and the perforator will be damaged again.

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