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A kind of preparation method of mud pump cylinder liner

A mud pump and cylinder liner technology, which is applied in the field of mud pump cylinder liner preparation, can solve the problems of high price of ceramic cylinder liners, influence on drilling construction progress, low hardness and toughness, etc., and achieve toughness and other mechanical properties. The effect of lifting and improving wear resistance

Active Publication Date: 2022-06-24
东营天工石油工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary high-chromium cast iron bimetallic cylinder liners have low hardness and toughness. In the case of high-pressure mud and high-hardness gravel as the medium in the friction pair formed with the piston, the service life is usually 400-600 hours. Ceramic cylinder liners The price is high, because the material difference between the inner casing and the outer casing is too large, and problems such as the inner casing falling off and the outer casing cracking are prone to occur, which seriously affects the progress of drilling construction

Method used

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  • A kind of preparation method of mud pump cylinder liner
  • A kind of preparation method of mud pump cylinder liner
  • A kind of preparation method of mud pump cylinder liner

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preparation example Construction

[0040] The invention relates to a preparation method of a mud pump cylinder liner, comprising the following steps:

[0041] Step 1. Rough machining the inner liner of the cylinder liner;

[0042] Step 2. Perform magnetic field heat treatment and tempering on the rough-processed cylinder liner to form a martensitic structure with dislocation cells through deformation and increase the precipitation of carbides (with the help of a magnetic field, improve the structure and precipitate More carbides, improve the hardness and comprehensive wear resistance of the cylinder liner);

[0043] Step 3, processing and grinding the inner liner of the cylinder liner after the magnetic field heat treatment in Step 2;

[0044] Step 4: After heating the outer casing of the cylinder liner to 400-500° C., the mud pump cylinder liner is obtained by inserting and machining the polished inner liner of the cylinder liner.

[0045]Wherein, when the inner liner of the cylinder liner is a metal inner l...

Embodiment 1

[0047] A preparation method of a mud pump cylinder liner, comprising the following steps:

[0048] Step 1. Rough machining of the inner liner of the cylinder liner: The inner liner of the cylinder liner is processed to the appropriate size by a lathe according to the requirements of the drawings.

[0049] Step 2. Magnetic field heat treatment and quenching and tempering treatment of the inner tank of the cylinder liner:

[0050] a. Magnetic field heat treatment and quenching stage: heat the rough-processed cylinder liner to 1050°C, keep the temperature for 120min, and then quench it to room temperature. During the quenching process, an alternating magnetic field with a magnetic field strength of 0.5T is introduced.

[0051] b. Magnetic field heat treatment and tempering stage: heat the liner liner after magnetic field heat treatment and quenching to 550°C, keep the temperature for 180min, then air-cool to room temperature, and introduce an alternating magnetic field with a mag...

Embodiment 2

[0055] A preparation method of a mud pump cylinder liner, comprising the following steps:

[0056] Step 1. Rough machining of the inner liner of the cylinder liner: The inner liner of the cylinder liner is processed to the appropriate size by a lathe according to the requirements of the drawings.

[0057] Step 2. Magnetic field heat treatment and quenching and tempering treatment of the inner tank of the cylinder liner:

[0058] a. Magnetic field heat treatment and quenching stage: heat the rough-processed cylinder liner to 1050℃, keep the temperature for 120min, and then quench it to room temperature. During the quenching process, an alternating magnetic field with a magnetic field strength of 0.1T is introduced.

[0059] b. Magnetic field heat treatment and tempering stage: The liner liner after magnetic field heat treatment and quenching is heated to 550 ° C, kept for 180 minutes, and then air-cooled to room temperature. During the tempering process, an alternating magnetic...

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Abstract

The invention relates to the technical field of cylinder liner processing, in particular to a method for preparing a mud pump cylinder liner. Step 1: Roughly process the cylinder liner liner; Step 2: Perform heat treatment on the rough-processed cylinder liner liner; Step 3 1. Process and polish the cylinder liner liner after the magnetic field heat treatment in step 2; step 4, heat the cylinder liner coat to 400-500°C and install and machine the polished cylinder liner liner to obtain the mud pump cylinder liner. The surface hardness and wear resistance of the liner prepared by the present invention are improved, and the hardness of the bimetallic cylinder liner is increased from the existing 58-61HRC to 63-64HRC. At the same time, the toughness and other mechanical properties of the cylinder liner prepared by the present invention are improved. .

Description

technical field [0001] The invention relates to the technical field of cylinder liner processing, in particular to a preparation method of a mud pump cylinder liner. Background technique [0002] With the development of the economy and the improvement of living standards, the consumption of energy is also increasing. In the foreseeable future, emerging energy sources cannot replace fossil fuels such as coal, oil, and natural gas, occupying a dominant position in energy consumption. With the increasing difficulty of oil and natural gas extraction, the increasing drilling depth, and the increasingly complex drilling conditions, higher requirements are placed on the equipment used for oil and natural gas extraction. Cylinder liner is one of the main wearing parts of mud pump equipment in the field of oil drilling and production. Its service life directly affects the drilling speed of oilfield development and the safety of drilling construction. [0003] The mud pump cylinder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/04C21D1/18C21D9/00F04B53/16B23P15/00
CPCC21D1/04C21D9/0068C21D1/18B23P15/00F04B53/166C21D2211/008C21D2211/004
Inventor 王宗哲王传成周武业
Owner 东营天工石油工程技术有限公司
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