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Zirconia ceramics for oil and gas wells and its manufacturing method

A technology of zirconia ceramics and a manufacturing method is applied in the fields of well workover ceramics, well completion, and oil and gas field drilling. coefficient, the effect of improving the intergranular strength

Active Publication Date: 2019-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of high sintering temperature of zirconia ceramic materials in the prior art and excessive friction coefficient at high temperature, which may cause damage to the expansion tube, and then provide a zirconia ceramic for oil and gas wells, and at the same time provide A method for manufacturing zirconia ceramics for oil and gas wells

Method used

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  • Zirconia ceramics for oil and gas wells and its manufacturing method
  • Zirconia ceramics for oil and gas wells and its manufacturing method
  • Zirconia ceramics for oil and gas wells and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add zirconia, magnesia, alumina, yttrium oxide, lanthanum oxide and samarium oxide into the ball mill according to the following weight to form a mixed powder, ZrO 2 , 74kg; MgO, 16kg; Al 2 o 3 , 4.4kg; Y 2 o 3 , 2kg; 2 o 3 , 1kg; Sm 2 o 3 , 0.6kg. Then add 0.8kg ethyl cellulose and 1.2kg polyammonium methacrylate to the mixed powder, then open ball mill ball mill to obtain slurry;

[0024] (2) Spray-dry the slurry obtained in (1) in a granulation spray tower, remove moisture therein to obtain granulated powder;

[0025] (3) Use polyvinyl chloride material to make the bag, and the proportioning ratio of polyvinyl chloride material is as follows: polyvinyl chloride resin, 49kg; dioctyl phthalate, 49kg; tribasic lead sulfate, 1.85kg; stearic acid, 0.15kg, heat the manufactured steel mold to 180°C in an oven, put the heated mold into the prepared polyvinyl chloride material, put the coated mold into the oven at 180°C to heat again, after 10min After the slurr...

Embodiment 2

[0029] (1) Mix powder, add zirconia, magnesia, aluminum oxide, yttrium oxide, lanthanum oxide and samarium oxide into the ball mill according to the following ratio. ZrO 2 , 74kg; MgO, 16kg; Al 2 o 3 , 4.5kg; Y 2 o 3 , 2kg; 2 o 3 , 0.8kg; Sm 2 o 3 , 0.7kg. Then add 1kg ethyl cellulose and 1kg polyethyl methacrylate in the mixed powder, start the ball mill;

[0030] (2) Spray-dry the slurry obtained in (1) in a granulation spray tower, remove moisture therein to obtain granulated powder;

[0031] (3) Use polyvinyl chloride material to make the bag, and the ratio of polyvinyl chloride material is as follows: polyvinyl chloride resin, 47kg; dioctyl phthalate, 50kg; tribasic lead sulfate, 2.85kg; stearic acid, 0.15kg, heat the manufactured steel mold to 180°C in an oven, and put the heated mold into the prepared polyvinyl chloride material. Put the coated mold into the oven at 180°C to heat again, take it out after 15 minutes after the slurry turns yellow, put it in wat...

Embodiment 3～8

[0034] Embodiment 3~8: step and experiment temperature are identical with embodiment 1, and concrete composition is as shown in table 1 below:

[0035] Table 1 The amount of each component of the mixed powder

[0036]

[0037] Where to prove the superiority of the present invention, also carried out following comparison test:

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Abstract

The invention relates to a zirconium oxide ceramic used for an oil and gas well and a preparation method thereof and belongs to the technical fields of ceramics for well drilling, well completion and well repair in an oil and gas field. The zirconium oxide ceramic is prepared by mixing following components, by mass: 73-76% of zirconium oxide, 15-17% of magnesium oxide, 4-6% of aluminum oxide, 1.8-2.2% of yttrium oxide, 0.5-1% of lanthanum oxide, 0.3-0.8% of samarium oxide, 0.8-1.2% of an adhesive and 0.8-1.2% of a dispersing agent. The preparation method includes the following steps: ball-milling the powder materials, performing granulation, producing a cover sleeve, performing isostatic cool pressing treatment, and sintering a blank material. The zirconium oxide ceramic is increased in compactness and reduced in sintering temperature, processing difficulty and processing cost by adding the yttrium oxide, the lanthanum oxide and the samarium oxide. By means of optimization of ratio of magnesium oxide to aluminum oxide, the zirconium oxide ceramic is significantly reduced in friction coefficient at the temperature of lower than 120 DEG C.

Description

technical field [0001] The invention relates to zirconia ceramics for oil and gas wells and a manufacturing method thereof, belonging to the technical field of ceramics for oil and gas field drilling, well completion and workover. 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 tub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/632
Inventor 行舒乐陈传东王木乐宋胜利赵斌向俊科郭伟成尚磊
Owner CHINA PETROLEUM & CHEM CORP
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