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Manufacturing method of movable ring of radially straightened sliding bearing

A manufacturing method and sliding bearing technology, applied in bearing components, shafts and bearings, mechanical equipment, etc., can solve problems such as low cost performance, high rejection rate, and unsatisfactory

Active Publication Date: 2020-08-04
BEIJING CHUNLUN PETROLEUM TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to technical confidentiality and economic benefits, domestic research and development units have not been able to communicate with each other on key technologies such as TC bearing molds and manufacturing methods, and there are no relevant literature reports, resulting in a variety of TC bearing molds and manufacturing processes, and a high scrap rate. No less, mainly reflected in: the hardness of the base material of the static ring and the dynamic ring is not up to the hardness HRC32~36 required by the downhole tool parts (usually only HRC25~30); the static ring and the dynamic ring are casted with tungsten carbide and copper base There are impurities in the alloy binder (shown as black holes of different sizes), the bonding strength between the hard alloy wear-resistant material and the cast tungsten carbide is low (≤60MPa), and the working life of the sliding bearing is low; secondly, when there is too much cast tungsten carbide, turning Difficult to process (cannot be processed by turning), high manufacturing cost, low cost performance, and cannot meet the needs of actual drilling downhole tools

Method used

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  • Manufacturing method of movable ring of radially straightened sliding bearing
  • Manufacturing method of movable ring of radially straightened sliding bearing
  • Manufacturing method of movable ring of radially straightened sliding bearing

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Embodiment Construction

[0065] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0066] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to t...

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Abstract

The invention provides a manufacturing method of a movable ring of a radially straightened sliding bearing. The method comprises the following steps of acquiring a movable ring manufacturing die whichcomprises a matrix and a sleeve die coaxially placed outside the matrix, wherein an annular space is formed between the matrix and the sleeve die, and an accommodation space is formed among the matrix, the sleeve die and a cover plate; arranging positioning reference, cleaning a to-be-bonded part, and bonding a wear-resistant part to an inner cylindrical surface of the sleeve die; assembling filler: pouring cast tungsten carbide powder into residual gaps of the annular space, putting positioning powder above the cast tungsten carbide powder to form a positioning layer, then placing a certainamount of bonding alloy in proportion, spraying a certain amount of fluxing agent uniformly to the bonding alloy in proportion, and carrying out covering by a cover plate; sintering an assembled and filled die to obtain a movable ring blank; and machining the air-cooled movable ring blank, wherein the dimension of the movable ring meets a designed demand. The service life of the radially straightened sliding bearing can be prolonged, and meanwhile, the machining difficulty and the manufacturing cost are lowered.

Description

technical field [0001] The invention relates to the technical field of metal processing and manufacturing of downhole tools for drilling, in particular to a method for manufacturing a radially righting sliding bearing moving ring of a rotary steerable system. Background technique [0002] Radial righting sliding bearings are vulnerable parts of drilling downhole tools. When maintaining downhole tools, replacing radial righting sliding bearings is one of the main tasks. At present, the radial centralizing sliding bearings of downhole tools are basically radial centralizing carbide sliding bearings (TC bearings for short). The hardness of the alloy is very high (HRA89~92), but because the drilling fluid contains a large amount of solid particles (such as iron ore powder, quartz sand, etc.), these fine particles will affect the static ring and the moving ring of the bearing when passing through the working gap of the centralizing bearing. The wear-resistant materials on the fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/10B22F3/03B22F3/093B22F3/10B22F7/08B22F1/00C22C32/00F16C33/14F16C33/12
CPCB22F5/106B22F3/03B22F3/093B22F3/1003B22F7/08B22F7/062C22C32/0052F16C33/14F16C33/12B22F2007/066B22F1/10
Inventor 赵红梅
Owner BEIJING CHUNLUN PETROLEUM TECH DEV CO LTD
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