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Perforating gun repair process

A gun body and process technology, applied in the repair process field, can solve problems such as cost waste, achieve considerable economic value, ensure operation safety, and reduce repair costs

Inactive Publication Date: 2006-12-27
DONGYING BEST PETRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After perforating, the perforating gun is taken out of the well and sold as scrap steel at 1,700 yuan per ton. For seamless alloy steel pipes such as 32CrMo4, it is scrapped after one use, which is very expensive in terms of material and cost. waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Embodiment, the present invention is further described:

[0016] (1) After perforation, the broken bullet holder, positioning plate, and bullet casing in the gun body will be stuck tightly, and a special tool must be used to shock and pull out the tool; it cannot be washed with water when cleaning; it is bent into a hook with a steel bar. Hook the cartridge holder, then tap the gun body with a hammer to pull out the cartridge holder;

[0017] (2) Drilling the pre-hole is to remove the burr around the bullet hole on the gun body (the burr is very hard, a special drill is required), and then drill a tapered hole with a specific shape and angle; use a Φ20 drill to drill a 70-degree slope;

[0018] (3) Welding and repairing bullet holes is the key to this process. First, use 507 welding rods with similar materials to the gun body. Before welding, the gun body must be heat-treated. First use gas welding to pre-heat the bullet hole, and when the temperature of the bullet hol...

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PUM

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Abstract

The present invention relates to a repair process for a multiple perforation apparatus used by oil and gas fields, particularly to a repair process for a gun perforator body. The technical scheme comprises the working procedures of cleaning sewage inside the gun, drilling pre-holes, welding and repairing bullet holes, repairing screws, digging lumens, trying out the pressure, drilling blind holes, repairing external surfaces, re-trying out the pressure and painting. The benefits comprise complex process without large-scale equipment, no change to its explosion-proof function due to no change to its gun body repairing materials, low repairing cost and superior steel material saving. The process meets the environmental protection requirement.

Description

1. Technical field: [0001] The invention relates to a repairing process of various perforating devices used in oil and gas fields, in particular to a repairing process of a perforating gun body. 2. Background technology: [0002] Perforation is a key operation in the development and construction of oil and gas fields. The quality of perforation depends not only on the performance of pyrotechnic products such as perforating bullets, but also closely related to their carrier - gun body. In other words, the material, structure and production process of the gun body are the key to ensure the perforation quality and operation safety. The gun body is the carrier of the perforating device, and the perforating operation can only be completed by transporting the perforating bullets and other pyrotechnics underground to a depth of hundreds to thousands of meters. It must have high sealing, anti-external pressure, anti-knock performance. Otherwise, it will cause accidents such as fla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
Inventor 冷霜
Owner DONGYING BEST PETRO TECH
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