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An integral high-energy hydraulic sandblasting perforator and its manufacturing process

A manufacturing process, hydrojet technology, applied in the direction of mining fluid, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of nozzle falling off, perforator failure, etc., to avoid nozzle falling off, improve reliability and improve use The effect of longevity

Active Publication Date: 2019-09-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During sandblasting and perforating operations, the high-speed sand-containing jet will repeatedly erode the area near the installation hole inside the body, and at the same time, after the high-speed sand-containing jet from the nozzle contacts the casing wall, the fluid splashed back to the perforator body It will erode the body near the nozzle, and in severe cases, it will cause the nozzle to fall off, and eventually cause the perforator to fail

Method used

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  • An integral high-energy hydraulic sandblasting perforator and its manufacturing process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: as figure 1 As shown, an integral high-energy hydraulic sandblasting perforator includes an upper joint 1, a perforating string 2 and a lower joint 3. The lower part of the upper joint 1 is provided with multiple trapezoidal upper connecting grooves 11, and the upper part of the lower joint 3 is provided with Multiple trapezoidal lower connecting grooves 31; the perforating pipe string 2 is sintered by cemented carbide powder, and consolidated with the upper joint 1 and the lower joint 3 as a whole; There are nine injection holes 21, and the phase angle between two adjacent injection holes 21 is 120°.

[0016] A manufacturing process of an integral high-energy hydraulic sandblasting perforator, comprising the following steps:

[0017] S1: Making moulds: making a cylindrical mold a corresponding to the inner surface of the perforating string 2, and making a cylindrical mold b corresponding to the outer surface of the perforating string 2, and the mold b is...

Embodiment 2

[0022] Embodiment 2: as figure 1 As shown, an integral high-energy hydraulic sandblasting perforator includes an upper joint 1, a perforating string 2 and a lower joint 3. The lower part of the upper joint 1 is provided with multiple rectangular upper connecting grooves 11, and the upper part of the lower joint 3 is provided with Multiple rectangular lower connecting grooves 31; the perforating string 2 is sintered by cemented carbide powder, and consolidated into a whole with the upper joint 1 and the lower joint 3; There are nine injection holes 21, and the phase angle between two adjacent injection holes 21 is 120°.

[0023] A manufacturing process of an integral high-energy hydraulic sandblasting perforator, comprising the following steps:

[0024] S1: Making moulds: making a cylindrical mold a corresponding to the inner surface of the perforating string 2, and making a cylindrical mold b corresponding to the outer surface of the perforating string 2, and the mold b is di...

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Abstract

The invention relates to an integral high-energy hydraulic sand blasting perforator used for the field of oil and gas exploitation and used for carrying out hydraulic sand blasting perforation on a down-hole target position of an oil and gas well and a manufacturing process thereof. The perforator comprises an upper joint, a perforation tubular column and a lower joint. The lower portion of the upper joint and the upper portion of the lower joint are both provided with multiple grooves, and the grooves are trapezoids or rectangles or dovetails. The perforation tubular column is sintered from hard alloy powder, and the perforation tubular column, the upper joint and the lower joint are fixedly connected into a whole. Nine blasting holes are distributed in the axial direction of the perforation tubular column along a spiral line, and the phase angle between every two adjacent blasting holes is 120 degrees. The manufacturing process of the perforator includes the steps of die manufacturing, base body manufacturing, base body arranging, powder press-blank manufacturing and sinter molding. The perforator and the manufacturing process thereof have the advantages that inner erosion and outer backwash damage, occurring in site construction of an oil and gas field, of the hydraulic sand blasting perforator is greatly reduced, the problem of disengagement of a spray nozzle in the prior art is solved, the reliability of the hydraulic sand blasting perforator is improved, and the service life of the hydraulic sand blasting perforator is prolonged.

Description

technical field [0001] The invention relates to an integral hydraulic sandblasting perforator for performing hydraulic sandblasting and perforation on the downhole target layer of an oil and gas well in the field of oil and gas exploitation. Background technique [0002] Hydraulic sandblasting perforation technology is to transport high-pressure sand-containing fluid downhole through the ground, shoot through the casing and the cement sheath of cementing in the downhole target layer, and penetrate into the formation to a certain depth to form oil and gas passages. Currently used hydraulic sandblasting perforators generally utilize threads to directly fix the nozzle in the mounting hole of the body. During sandblasting and perforating operations, the high-speed sand-containing jet will repeatedly erode the area near the installation hole inside the body, and at the same time, after the high-speed sand-containing jet from the nozzle contacts the casing wall, the fluid splashed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/114B22F5/12B22F3/10B22F3/02
Inventor 张德荣吴思梦孔春岩岳华伟孙林平谢武军
Owner SOUTHWEST PETROLEUM UNIV