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A kind of blocking ball and preparation method thereof

A technology of adjusting plugging balls and raw materials, which is applied in the field of plugging adjusting balls and its preparation, can solve the problems of poor material fusion, and achieve obvious effects, high shear strength, uniform and sufficient dissolution

Active Publication Date: 2017-07-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a plugging regulating ball and a preparation method thereof. The plugging ball has the advantages of high density accuracy and high strength.

Method used

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Embodiment

[0037] This embodiment provides a plugging adjustment ball. In terms of mass percentage, the raw material composition of the plugging adjustment ball includes polycaprolactam 12.5% ​​(viscosity average molecular weight is 60,000-70,000), polyhexamethylene adipamide 18.7% (viscosity The average molecular weight is 50,000-70,000), 65.1% polyacrylamide (viscosity average molecular weight is 15-18 million, and the degree of polymerization is 180,000), 1.26% nano-calcium oxide and 2.44% QYL produced by Shenzhen Qiyanglong Technology Co., Ltd. -300 type solubilizer.

[0038] The preparation method of the plugging adjusting ball provided in this embodiment comprises the following steps:

[0039] 1) Weigh polycaprolactam, polyhexamethylene adipamide, polyacrylamide, nano-calcium oxide, and solubilizer according to the mass ratio requirements, place them in the barrel, and adjust the temperature of the barrel to 245°C. Fully stir the mixture in the barrel at high temperature;

[0040...

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PUM

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Abstract

The invention provides a plugging control ball and a preparation method thereof. The plugging control ball comprises, by weight, 10-15% of polycaprolactam, 15-20% of polyhexamethylene adipamide, 65-80% of polyacrylamide, 1-1.5% of nanometer calcium oxide and 2-3% of a solubizing agent, wherein the sum of the percentages of all the components is 100%. Preferably, the sum of the weight percentages of the consumption of the polycaprolactam, the polyhexamethylene adipamide and the polyacrylamide is 95-97.5%. The invention further provides the preparation method of the plugging control ball. The method comprises the steps that the polycaprolactam, the polyhexamethylene adipamide, the polyacrylamide, the nanometer calcium oxide and the solubizing agent are mixed uniformly to obtain a mixture; the mixture is sufficiently stirred and injected into a vacuum spherical mold; the mold is cooled to obtain the plugging control ball. The plugging control ball has the advantages of being high in density, precision and strength and is easy and convenient to use and obvious in effect when applied to a water injection well.

Description

technical field [0001] The invention relates to a blocking regulating ball and a preparation method thereof, belonging to the technical field of subdivided water injection. Background technique [0002] Restricted by the geographical environment, Hainan 3 fault block of Liaohe Oilfield is mostly highly deviated wells. Therefore, after the injection is transferred, the water injection wells have a large inclination angle, and there are often casing changes and falling objects. The conventional separate injection process cannot achieve effective separate injection, resulting in The contradiction of water injection is becoming more and more prominent. By putting the plugging ball into the wellhead, no operation is required, and the pipe string is not moved, and the plugging ball is used to plug the blasthole of the high-permeability layer, so that the effect of adjusting the water absorption profile can be achieved. [0003] The article "Study on the Technology of Profile Contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/26C08L77/02C08L77/06C08K3/22
Inventor 安岩寇微丁超张越裴红李楠戴双宁周广安李晖
Owner PETROCHINA CO LTD
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