Nozzle machining technology

A processing technology and nozzle technology, which is applied in the processing technology field of petroleum extraction equipment, achieves the effects of simple process, reduced production cost and favorable product quality

Inactive Publication Date: 2014-10-08
CHENGDU GAOPU PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The working pressure of the nozzles in the prior art is high pressure or ultra-high pressure, and the mechanical strength of the nozzle is the direct factor affecting the life of the nozzle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A nozzle machining process comprising the following steps performed in sequence:

[0023] A) blank forging;

[0024] B) heat treatment;

[0025] C) Machining;

[0026] In the step A), the blank is made of 45# steel, the forging temperature ranges from 875°C to 1025°C, and the forging heat source is a reverberatory furnace; the step B) includes quenching and tempering after quenching.

[0027] Specifically, the process of the present invention is simple. By selecting the material of the nozzle as 45# steel, and obtaining the best forging temperature range through a limited number of tests for the above-mentioned materials, the process of the present invention can be made by selecting materials with low cost and being easy to obtain. A nozzle that meets the strength requirements can be obtained through a reasonable process. Compared with the existing technology, it is beneficial to reduce the production cost of the nozzle; the forging heat source adopts the process desi...

Embodiment 2

[0029] This embodiment is further limited on the basis of Example 1. In order to improve the plasticity of the blank and reduce the deformation resistance, the step A) also includes a blank preheating step before forging, and the blank preheating step is room temperature The blank is heated to 200°C-350°C.

[0030] In order to make the nozzle obtain sufficient hardness, wear resistance and fatigue resistance, and reduce the degree of surface oxidation of the nozzle during the quenching process, the quenching temperature in the step B) ranges from 820°C to 850°C, and the quenching adopts oil-cooled rapid cooling method ;

[0031] In order to eliminate the internal stress generated in the nozzle during the quenching process, reduce the brittleness of the nozzle, improve the toughness of the nozzle, and reduce the degree of surface oxidation of the nozzle during the tempering process, the heating temperature range of the tempering is 570°C-600°C, and the tempering The fire tempe...

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PUM

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Abstract

The invention discloses a nozzle machining technology which comprises the following steps of (A) workblank forging, (B) heat treatment and (C) machining in sequence. According to the step (A), the workblank is made of steel of the number 45, the forging temperature ranges from 875 DEG C to 1025 DEG C, and a reverberating furnace is adopted as a forging heat source. According to the step (B), quenching and tempering carried out after quenching are included. The technology is simple, the materials which are low in cost and convenient to obtain are selected through the technology, and a nozzle which meets the strength requirement can be obtained through the reasonable technology; compared with the prior art, the production cost of the nozzle is reduced, and the machining quality of the nozzle is improved.

Description

technical field [0001] The invention relates to a processing technology of oil extraction equipment, in particular to a nozzle processing technology. Background technique [0002] The emergence of jet drilling technology in the late 1940s was a revolution in drilling technology, which brought the drilling speed to a higher level. In 1949, the United States tried small nozzles on the drill bit body for the first time. In 1955, the nozzle combination system was adopted in the design of the drill bit. Since then, the hydraulics of the nozzle drill bit came into being. People realized that the hydraulic parameters of the drill bit are the main factors affecting the ROP: 1973 In 1980, the American Exxon company found that when the pressure drop of the nozzle was 104MPa, the continuous jet could impact and break 70%-80% of the drilled rock, and the ROP was increased by 2-3 times; The mechanical penetration rate of the channel string ultra-high pressure jet-assisted drilling syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00E21B10/61
Inventor 周斌
Owner CHENGDU GAOPU PETROLEUM ENG TECH
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