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Zirconia reinforced alumina ceramic liner

A technology of alumina ceramics and zirconia, applied in the field of ceramics, can solve the problems of low service life, high firing temperature, long production cycle, etc., and achieve the effects of improving firing yield, improving fracture toughness, and reducing shrinkage

Inactive Publication Date: 2005-11-30
祝卫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of grouting technology and secondary firing, there are deficiencies in the aspects of long production cycle, complex process, high firing temperature, and the service life that can be achieved is still low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0008] Weigh 100 kg of alumina powder according to the formula, of which 35 kg is a coarse powder of 1.0-2.8 μm, 65 kg is a fine powder with an average particle size of 0.8-1.0 μm, add 15vol% zirconia (containing 2 to 3mol% yttrium oxide ) was added with 60 kg of water and 547 g of ammonium polyacrylate, mixed by ball milling, granulated and isostatically pressed to form a cylinder liner, and fired at 1600°C for 3 hours. The obtained cylinder liner material has a strength of 570MPa and a fracture toughness of 11Mpam 1 / 2 , After the inner and outer circles of the ceramic lining are processed and assembled with the corresponding metal jacket, the service life can exceed 2000 hours.

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PUM

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Abstract

The granularmetric composition of aluminum oxide as main constituent of ceramic jacket of drill pump comprises 60-70wt% of aluminum oxide with particle mean size of 0.8-1.0mum and 30-40wt% of aluminum oxide with particle mean size of 1.0-2.8mum. Moreover, 15mol% of zirconium oxide and disperser are added to it and the mixture is shaped by isostatic pressing after abrading-ball mixing and spray pelleting then treated under the temperature between 1550-1620 Deg.C to produce ceramic jacket with life duration of more than 2000h. Meanwhile, the invention has the advantages of high rate of finished products and low cost of material and process.

Description

technical field [0001] The invention belongs to the field of ceramics and is suitable for preparing ceramic inner linings of ceramic cylinder liners for oil field drilling pumps. Background technique [0002] Drilling pump is an important equipment for transporting drilling mud and taking bottom rock debris out of the well during oilfield drilling. During the use process, it is affected by the wear and corrosion of sandy and alkaline mud, and its cylinder liner is easy to wear and fail. Its frequent replacement or maintenance seriously affects the drilling production efficiency. [0003] The existing cylinder liners are mostly made of metal materials. In order to improve the service life of cylinder liners, the patent "EP.162.284.A" proposes ceramic cylinder liners made of 96 alumina, which can reduce the life of traditional metal cylinder liners from 200 Hours extended to 800 to 1000 hours. However, due to the use of grouting technology and secondary firing, there are def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/119
Inventor 祝卫刘海儒
Owner 祝卫
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