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Zirconia ceramic for oil/gas well and preparation method of zirconia ceramic

A technology for zirconia ceramics and oil and gas wells, applied in the field of ceramics, can solve problems such as excessive friction coefficient, low friction coefficient, and high sintering temperature, and achieve the effects of low friction coefficient, lower sintering temperature, and increase density

Active Publication Date: 2017-06-13
ANHUI TUOJITAI NOVEL CERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a zirconia ceramic for oil and gas wells. The ceramic has a low friction coefficient, which solves the problem that the sintering temperature of the zirconia ceramic material is high and the expansion pipe is easily damaged due to an excessive friction coefficient at high temperature.

Method used

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  • Zirconia ceramic for oil/gas well and preparation method of zirconia ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A zirconia ceramic for oil and gas wells, calculated in parts by weight, comprising the following raw materials:

[0027] 62 parts of zirconium oxide, 2 parts of millionth oxide, 0.5 part of lanthanum oxide, 1.5 parts of samarium oxide, 1 part of graphite, 2 parts of molybdenum carbide, 1 part of methyl cellulose and 1 part of polyammonium methacrylate; wherein, the graphite and Molybdenum carbide needs to be soaked in dilute nitric acid first, and then solid-liquid separation.

[0028] The preparation method comprises the following steps:

[0029] 1) Pretreatment: graphite and molybdenum carbide need to be soaked in 1mol / L dilute nitric acid for 30 minutes, and then separated from solid and liquid to obtain pretreated graphite and molybdenum carbide;

[0030] 2) Ball milling powder: Weigh zirconia, 100 million oxide, lanthanum oxide and samarium oxide according to the ratio, and then mix them with pretreated graphite and molybdenum carbide and add them to the ball mil...

Embodiment 2

[0036] A zirconia ceramic for oil and gas wells, calculated in parts by weight, comprising the following raw materials:

[0037] 70 parts of zirconium oxide, 1.5 parts of millionth oxide, 0.4 part of lanthanum oxide, 0.5 part of samarium oxide, 1.5 parts of graphite, 4 parts of molybdenum carbide, 2 parts of ethyl cellulose and 2 parts of polyammonium methacrylate; wherein, the graphite and Molybdenum carbide needs to be soaked in dilute nitric acid first, and then solid-liquid separation.

[0038] The preparation method comprises the following steps:

[0039] 1) Pretreatment: graphite and molybdenum carbide need to be soaked in 0.5mol / L dilute nitric acid for 40 minutes, and then separated from solid and liquid to obtain pretreated graphite and molybdenum carbide;

[0040] 2) Ball milling powder: Weigh zirconia, 100 million oxide, lanthanum oxide and samarium oxide according to the ratio, and then mix them with pretreated graphite and molybdenum carbide and add them to the b...

Embodiment 3

[0046] A zirconia ceramic for oil and gas wells, calculated in parts by weight, comprising the following raw materials:

[0047]60 parts of zirconium oxide, 2.5 parts of millionth oxide, 1.2 parts of lanthanum oxide, 1.5 parts of samarium oxide, 0.5 parts of graphite, 2 parts of molybdenum carbide, 1.5 parts of ethyl cellulose and 1.5 parts of polyammonium methacrylate; wherein, the graphite and Molybdenum carbide needs to be soaked in dilute nitric acid first, and then solid-liquid separation.

[0048] The preparation method comprises the following steps:

[0049] 1) Pretreatment: graphite and molybdenum carbide need to be soaked in 3mol / L dilute nitric acid for 20 minutes, and then separated from solid and liquid to obtain pretreated graphite and molybdenum carbide;

[0050] 2) Ball milling powder: Weigh zirconia, billionth oxide, lanthanum oxide and samarium oxide according to the ratio, and then mix them with pretreated graphite and molybdenum carbide and add them to the ...

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Abstract

The invention discloses a zirconia ceramic for an oil / gas well and a preparation method of the zirconia ceramic. The zirconia ceramic is prepared from the following raw materials in parts by weight: 60-70 parts of zirconium oxide, 1.5-2.5 parts of yttrium oxide, 0.4-1.2 parts of lanthanum oxide, 0.5-1.5 parts of samarium oxide, 0.5-1.5 parts of graphite, 2-4 parts of molybdenum carbide, 1-2 parts of an adhesive and 1-2 parts of a dispersing agent. The preparation method comprises the following steps: 1) pretreating, namely, soaking the graphite and the molybdenum carbide with dilute nitric acid, and performing solid-liquid separation so as to obtain pretreated graphite and molybdenum carbide; 2) performing ball-milling on different components so as to obtain slurry; 3) pelletizing, namely, performing spraying pelletizing on the slurry; 4) manufacturing coatings; 5) performing isostatic cool pressing; and 6) sintering blanks. The zirconia ceramic is low in friction coefficient, and the problem that an expansion tube can be easily broken as a zirconium oxide ceramic material is relatively high in sintering temperature and too large in friction coefficient at high temperature can be solved.

Description

technical field [0001] The invention belongs to the technical field of ceramics, and in particular relates to a zirconia ceramic for oil and gas wells and a preparation method thereof. Background technique [0002] In oil and gas field drilling, well completion and well workover operations, expandable pipe technology has been widely used, especially in subsidizing casing broken or corroded well sections, subsidizing reinforcement after drilling passages in casing transformation wells, plugging perforated intervals, sealing It has obvious technical advantages in plugging high water-producing intervals, deepening wells and completing sidetracked wells. The expansion tube technology is to drive the expansion core to move longitudinally in the expansion tube under the action of hydraulic or mechanical force, and squeeze the inner wall of the expansion tube through the expansion section of the expansion core, so that the expansion tube undergoes permanent plastic deformation, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/64
CPCC04B35/48C04B35/622C04B35/64C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3839C04B2235/425
Inventor 何东张天宇宋晓超张天舒
Owner ANHUI TUOJITAI NOVEL CERAMIC TECH
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