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Preparation method of slurry pump cylinder sleeve

A mud pump and cylinder liner technology, which is applied in the field of preparation of mud pump cylinder liners, 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: 2022-03-11
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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  • Preparation method of slurry pump cylinder sleeve
  • Preparation method of slurry pump cylinder sleeve
  • Preparation method of slurry pump cylinder sleeve

Examples

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preparation example Construction

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

[0041] Step 1. Rough machining the liner liner;

[0042] Step 2. Perform magnetic field heat treatment and tempering on the rough-machined 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 polishing the cylinder liner liner after the magnetic field heat treatment in step 2;

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

[0045]Wherein, when the cylinder liner is a metal liner, the magnetic field heat treatment quenching and tempering...

Embodiment 1

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

[0048] Step 1. Rough machining of the cylinder liner liner: the cylinder liner liner is processed to a suitable size by lathe according to the drawing requirements.

[0049] Step 2: Quenching and tempering treatment of cylinder liner liner with magnetic field heat treatment:

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

[0051] b. Tempering stage of magnetic field heat treatment: heat the liner liner after magnetic field heat treatment and quenching to 550°C, keep it warm for 180 minutes, then air cool to room temperature, and pass an alternating magnetic field with a magnetic field strength of 0.5T during the tempering process.

[0052] Step 3. Proc...

Embodiment 2

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

[0056] Step 1. Rough machining of the cylinder liner liner: the cylinder liner liner is processed to a suitable size by lathe according to the drawing requirements.

[0057] Step 2: Quenching and tempering treatment of cylinder liner liner with magnetic field heat treatment:

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

[0059] b. Tempering stage of magnetic field heat treatment: heat the liner liner after magnetic field heat treatment and quenching to 550°C, keep it warm for 180min, then air cool to room temperature, and pass an alternating magnetic field with a magnetic field strength of 0.1T during the tempering process.

[0060] Step 3. Processin...

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Abstract

The invention relates to the technical field of cylinder sleeve machining, in particular to a slurry pump cylinder sleeve manufacturing method which comprises the steps that firstly, a cylinder sleeve inner container is subjected to rough machining; secondly, the cylinder sleeve inner container obtained after rough machining is subjected to heat treatment; thirdly, the cylinder sleeve inner container subjected to magnetic field heat treatment in the second step is machined and polished; and fourthly, after the cylinder sleeve outer sleeve is heated to 400-500 DEG C, the cylinder sleeve outer sleeve and the polished cylinder sleeve inner container are subjected to embedding and machining, and then the slurry pump cylinder sleeve is obtained. The surface hardness and wear resistance of the prepared inner container are improved, the hardness of the double-metal cylinder sleeve is improved from 58-61 HRC to 63-64 HRC, and meanwhile the toughness and other mechanical properties of the prepared cylinder sleeve are improved.

Description

technical field [0001] The invention relates to the technical field of cylinder liner processing, in particular to a method for preparing a mud pump cylinder liner. Background technique [0002] With the development of the economy and the improvement of living standards, energy consumption is also increasing. In the foreseeable future, emerging energy cannot replace fossil fuels such as coal, oil, and natural gas, and will occupy 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 in oil and natural gas extraction. The 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] Mud pump cylinder liners are u...

Claims

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Application Information

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Patent Type & Authority Applications(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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