Self-dissolving functional material for making well drilling bridge plug rubber packer and preparation method therefor

A functional material and self-dissolving technology, which is applied in the field of self-dissolving functional materials and its preparation, can solve the problems of reducing production efficiency, hindering, increasing operating costs, etc., and achieve the effect of improving production efficiency and high mechanical strength

Active Publication Date: 2015-10-28
FRACTURING COMPANY OF CNPC GREATWALL DRILLING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials will hinder the operation of the next step after completing their mission. In the past, the flowback process was usually used to return them to the ground, which greatly increased operating costs and reduced production efficiency.

Method used

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  • Self-dissolving functional material for making well drilling bridge plug rubber packer and preparation method therefor
  • Self-dissolving functional material for making well drilling bridge plug rubber packer and preparation method therefor
  • Self-dissolving functional material for making well drilling bridge plug rubber packer and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Grind 40kg of polyurethane rubber, 1.5kg of sodium hydroxide, 0.5kg of polyvinyl alcohol, and 5kg of magnesium into granules (the particle size is 100-200 mesh), heat the granulated polyvinyl alcohol to melt, and use the melted polyethylene Alcohol carries out repeatedly wrapping to granular sodium hydroxide, until obtaining the sodium hydroxide inclusion body of wrapping completely; With 40kg polyurethane rubber, 15kg diatomaceous earth, 5kg magnesium powder, 10kg cotton fiber (diameter 0.1-0.5mm) and gained The sodium hydroxide inclusions are evenly mixed to obtain the material.

Embodiment 2

[0027] 60kg polyurethane rubber, 2kg potassium hydroxide, 15kg diatomaceous earth, 1kg paraffin, 5kg magnesium aluminum alloy (magnesium 90wt%, aluminum 10wt%) are pulverized into granular (particle size is 100-200 order); Heat to melt, and wrap the granular potassium hydroxide several times with the melted paraffin until the completely wrapped potassium hydroxide inclusions are obtained; 60kg polyurethane rubber, 5kg magnesium aluminum alloy powder, 15kg diatomaceous earth, 10kg nylon fiber (diameter 0.1-0.5mm) and the obtained potassium hydroxide inclusions are evenly mixed to obtain the material.

Embodiment 3

[0029] Grind 30kg of polyurethane rubber, 30kg of butadiene rubber, 4kg of Mg(OH)Cl, 1kg of sodium stearate, 20kg of sodium polyacrylate water-absorbing resin, and 10kg of magnesium into granules (the particle size is 100-200 mesh) into granules ; The granular sodium stearate is heated and melted, and the granular Mg(OH)Cl is repeatedly wrapped with the molten sodium stearate until the complete Mg(OH)Cl inclusions are obtained; the 30kg polyurethane rubber Mix with 30kg of butadiene rubber, 20kg of sodium polyacrylate water-absorbing resin, 10kg of magnesium powder, 15kg of polyester fiber (diameter 0.1-0.5mm) and the obtained Mg(OH)Cl inclusions, stir to make the mixture uniform, and the material is obtained.

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Abstract

The present invention relates to a self-dissolving functional material for making a well drilling bridge plug rubber packer and a preparation method therefor. The self-dissolving polymer functional material is prepared by using the following raw materials in parts by weight: 40-60 parts of rubber, 15-25 parts of a first water-absorbing material, 5-10 parts of a magnesium-containing metal material, 1-10 parts of a degradation agent, 1-10 parts of an organic wrapping material, and 10-20 parts of a second water-absorbing material. The preparation method comprises: completely wrapping the degradation agent by using the organic wrapping materials; and uniformly mixing the other raw materials with a degradation agent covering body that is completely wrapped, to obtain the self-dissolving functional material. The self-dissolving functional material provided by the present invention has higher mechanical strength, so that complete use of the self-dissolving functional material in a short time period can be ensured. According to the present invention, controllability of material self-dissolving time can be realized by adjusting ratios of components in raw materials; and after the material is used, the material can be self-dissolved in an aqueous solution or when heated; the material can be widely applied to exploitation of mineral resources comprising oil, gas and the like; and productivity can be greatly improved because no return operation is needed.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer materials for drilling, and in particular relates to a self-dissolving functional material for making bridge plug rubber sleeves for drilling and a preparation method thereof. Background technique [0002] During mineral (such as oil and gas) mining operations, it is often necessary to put some materials with specific functions (such as bridge plugs, fracturing balls) downhole. These materials will hinder the operation of the next step after completing their mission. In the past, the flowback process was usually used to return them to the ground, which greatly increased operating costs and reduced production efficiency. Contents of the invention [0003] In view of the defects in the prior art, an object of the present invention is to provide a self-dissolving functional material for making bridge plug rubber sleeves for drilling. The material has high mechanical strength and can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L9/00C08L1/02C08L33/02C08L77/00C08L67/00C08L31/04C08K3/34C08K3/08C08K9/10C08K3/22C08K3/32
Inventor 席君杰张伟刚黄传兵席天宇席天岳
Owner FRACTURING COMPANY OF CNPC GREATWALL DRILLING
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