Well cementing cement slurry stabilizer, preparation method and applications thereof

A cement slurry and stabilizer technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems affecting the performance of wenlun glue stabilizer, affecting the preparation process of cement slurry, and the consistency of cement slurry, etc., to achieve effective It is conducive to normal pumping, prevents free liquid and settlement, and improves the effect of compressive strength

Active Publication Date: 2015-12-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydration and viscosification of the stabilizer in water will prolong the ashing time and affect the cement slurry preparation process. If it is added in a large amount, it may not be able to ash, or the cement slurry will have a thicker consistency, which will affect the pumping process and cementing. There are cer...

Method used

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  • Well cementing cement slurry stabilizer, preparation method and applications thereof
  • Well cementing cement slurry stabilizer, preparation method and applications thereof
  • Well cementing cement slurry stabilizer, preparation method and applications thereof

Examples

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preparation example Construction

[0050] (b) Preparation of main chain AA / AMPS copolymer: Dissolve 471g of AA and 729g of AMPS in 4800g of deionized water, transfer to a 10L three-port reaction vessel, stir at a speed of 200r / min and turn on the heating device, wait until the temperature When the temperature rises to 60°C, add 7.2g of potassium persulfate and react for 5 hours to obtain a colorless and transparent solution; after the reaction is completed, add an appropriate amount of sodium hydroxide to adjust the pH of the reaction solution to be neutral, and use a vacuum freeze dryer to freeze-dry to make a powder The AA / AMPS copolymer of shape is for standby;

[0051] (c) Preparation of grafted polymer: KH 2 PO4 and Na 2 HPO 4 Prepare a buffer solution with a pH of 7.4, add 962g of side chain NIPA / DMAA copolymer and 438g of main chain AA / AMPS copolymer to 5600g of the above buffer solution, stir until completely dissolved; then add 5.23g of 1-ethyl -(3-Dimethylaminopropyl)carbodiimide hydrochloride and ...

Embodiment 1

[0053] Weigh 14.8Kg of quartz sand and put it in the powder mixer, start the stirring device and stir at a speed of 30r / min, then add 1.0Kg Wenlun gum, 1.6Kg xanthan gum, 1.0KgPVA-1788, 1.6 Kg of grafted high molecular polymer, after stirring continuously for 90 minutes according to the above speed, the cement slurry stabilizer of this embodiment can be obtained, which is recorded as WDJ-1.

Embodiment 2

[0055] Weigh 15.4Kg of quartz sand and place it in the powder mixer, start the stirring device and stir at a speed of 40r / min, then add 1.6Kg Wenlun gum, 1.0Kg xanthan gum, 1.4KgPVA-1788, 0.6 Kg of grafted high molecular polymer, after stirring continuously for 70 minutes according to the above speed, the cement slurry stabilizer of this embodiment can be obtained, which is recorded as WDJ-2.

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Abstract

The present invention provides a well cementing cement slurry stabilizer, a preparation method and applications thereof, wherein the well cementing cement slurry stabilizer comprises, by weight, 54-89 parts of quartz sand, 2-20 parts of Welan gum, 0-8 parts of xanthan gum, 3-10 parts of polyvinyl alcohol, and 3-8 parts of a grafted macromolecule polymer. According to the present invention, the stability of the cement slurry can be improved through the stabilizer, the stabilizer does not provide adverse effects on other properties of the cement slurry during the use process, and the stabilizer further provides the benefit on the compressive strength of the cement stone.

Description

technical field [0001] The invention relates to a cement slurry stabilizer for well cementing, a preparation method and application thereof, and belongs to the technical field of cement slurry admixtures for oilfield well cementing. Background technique [0002] Cementing is an important link in the drilling and completion process, and it is a decisive factor in evaluating the drilling and completion cycle of oil and gas wells, the quality of cementing and the service life of oil and gas wells. In order to strengthen the oil and gas well wall, ensure continuous drilling, ensure layered oil testing during exploration and reasonable oil and gas production during the entire production process, a casing with a pre-designed size is run in the drilled wellbore, and the casing and the well wall are installed. The operation of injecting cement slurry into the annulus is called well cementing. The cement injection operation is to inject the pre-prepared cement slurry into the annula...

Claims

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Application Information

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IPC IPC(8): C09K8/467C04B24/26C08G81/02
CPCC04B24/2623C04B2103/0059C08G81/021C09K8/467
Inventor 于永金靳建洲夏修建徐明刘硕琼袁进平齐奉忠韩琴
Owner BC P INC CHINA NAT PETROLEUM CORP
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