Integral hydraulic sand blasting perforator with long service life and manufacturing technique thereof
A one-piece, hydraulic jet technology, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of short service life, easy damage and failure of perforators, etc., so as to improve service life and reduce internal pressure. Erosion and external splash damage, the effect of preventing the nozzle from falling off
Active Publication Date: 2017-01-04
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0003] The purpose of the present invention is to provide a long-life one-piece hydraulic sandblasting perforator and its manufacturing process in order to solve the problems of the existing assembled perforators that are easily damaged, invalidated, and have a short service life.
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[0016] Such as figure 1 , figure 2 and image 3 As shown, a long-life one-piece hydraulic sandblasting perforator is composed of a main cylinder 1 and a perforating matrix 2. Its structural feature is that the upper end of the main cylinder 1 is set as a female button, and the lower end is set as a male Buckle, a ring of sunken step shafts is set in the middle of the outer circle of the main cylinder 1, a circle of concave step holes is set in the middle of the inner hole of the main cylinder 1, and three sets of radial through holes 11 are evenly arranged in the middle of the main cylinder 1 in the axial direction, each A group of three radial through holes 11 are evenly distributed in the circumferential direction; the perforation matrix 2 is sintered from erosion-resistant material powder and consolidated in the middle of the main cylinder 1; the perforation matrix 2 is provided with injection holes 21 , the injection hole 21 communicates with the inner and outer spaces ...
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The invention relates to the field of oil and gas exploitation, in particular to an integral hydraulic sand blasting perforator for carrying out hydraulic sand blasting perforation on a target layer under an oil / gas well, and a manufacturing technique of the integral hydraulic sand blasting perforator. Through the integral hydraulic sand blasting perforator, the problems that an existing assembly type perforator is prone to damage and failure and short in service life are solved. According to the technical scheme, a female buckle is arranged at the upper end of a main drum, a male buckle is arranged at the lower end of the main drum, a circle of subsidence stepped shaft is arranged in the middle of the outer circle of the main drum, a circle of inwards-concave stepped hole is formed in the middle of an inner hole of the main drum, three sets of radial through holes are evenly formed in the middle of the main drum in the axial direction, and each set of radial through holes include the three holes evenly distributed in the circumferential direction; a perforation matrix is formed by sintering erosion-resistant powder and is fixedly connected to the middle of the main drum; and a jet hole is formed in the perforation matrix. The manufacturing technique of the integral hydraulic sand blasting perforator comprises mold manufacturing, base manufacturing, base arrangement and sintering molding. The integral hydraulic sand blasting perforator is of an integral structure and is simple in structure, high in reliability and long in service life.
Description
technical field [0001] The invention relates to a one-piece hydraulic sandblasting perforator used in the field of oil and gas exploitation to perform hydraulic sandblasting and perforation on the downhole target layer of an oil and gas well and its manufacturing process. Background technique [0002] Hydraulic sandblasting perforation technology is to transport high-pressure sand-containing fluid downhole through the ground, shoot through the casing and cement sheath at the downhole target layer, and penetrate into the formation to a certain depth to form oil and gas channels. Currently used hydraulic sandblasting perforators generally utilize threads to directly fix the nozzle in the mounting hole of the body. During the sandblasting and perforating operation, the high-speed sand-containing jet will repeatedly erode the area near the installation hole inside the body. The sand fluid will erode the perforator body near the nozzle, damage the structure of the perforator bod...
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IPC IPC(8): E21B43/114B22F5/10
CPCB22F5/10E21B43/114
Inventor 张德荣吴思梦谢武军孔春岩岳华伟孙林平
Owner SOUTHWEST PETROLEUM UNIV