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Formula of deformable plugging polymer latex for drilling fluid and preparation method of deformable plugging polymer latex

A technology of polymer latex and production method, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problem that it does not have temperature resistance and salt resistance, cannot effectively reduce friction, and cannot reduce pore pressure. and other problems, to achieve the effect of high impact strength, low shrinkage rate, and reduction of differential pressure sticking.

Pending Publication Date: 2019-10-11
晋州市茂源钻采技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deformable plugging polymer latex for drilling fluid has the following disadvantages: the existing deformable plugging polymer latex for drilling fluid cannot seal micropores and embed in microfractures; it cannot reduce pore pressure; Temperature and salt resistance; cannot effectively reduce friction, which is not conducive to reducing differential pressure sticking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides a formula of deformable plugging polymer latex for drilling fluid and a preparation method thereof, comprising clear water, sodium hydroxide, acrylamide, oil, acrylamide, polyacrylate, epichlorohydrin and an initiator, clear water 80 parts of sodium hydroxide, 3 parts of sodium hydroxide, 20 parts of acrylamide, 50 parts of oil, 4.5 parts of polyacrylate, 5 parts of epichlorohydrin and 0.5 parts of initiator. The production method:

[0022] Step 1: Take 80 parts of clean water and put it into the mixing tank, the speed of the mixing tank is 12000r / min;

[0023] Step 2: Add 3 parts of sodium hydroxide to 80 parts of clear water and stir for 10 minutes; then add 20 parts of acrylamide and stir for 10 minutes; then add 50 parts of oil and stir for 30 minutes; then add 4.5 parts of poly Acrylate, stirred for 10 minutes; then added 5 parts of epichlorohydrin, stirred for 15 minutes, then added 0.5 parts of initiator, stirred for 5 minutes;

[0024] St...

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PUM

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Abstract

The invention discloses a formula of deformable plugging polymer latex for drilling fluid and a preparation method of the deformable plugging polymer latex. The deformable plugging polymer latex comprises 80 parts of clear water, 3 parts of sodium hydroxide, 20 parts of acrylamide, 50 parts of oil, 4.5 parts of polyacrylate, 5 parts of epoxy chloropropane and 0.5 part of an initiator, and the polymer latex is an emulsion polymer prepared through enabling an emulsifying agent, a polymer monomer and an initiator to be subjected to polymerization reaction; in the drilling process, small particlesform a closed membrane in a permeable or micro-cracked stratum and are adhered onto a well wall under the action of differential pressure to gather and form deformable micelle, when drilling fluid starts permeating towards shale, the micelle is paved and spread on the shale, forms a low-permeability closed membrane at the opening of a hole to prevent the drilling fluid from permeation, and reduces the filter loss of the drilling fluid effectively.

Description

technical field [0001] The invention relates to a deformable plugging polymer latex for drilling fluid, in particular to a formula and a preparation method of the deformable plugging polymer latex for drilling fluid. Background technique [0002] Drilling fluid is a general term for various circulating fluids that meet the needs of drilling work with its multiple functions during the drilling process. Drilling fluid is the blood of drilling, also known as drilling flushing fluid. Drilling fluid can be divided into clear water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Clear water is the earliest drilling fluid, it does not need to be treated, it is easy to use, and it is suitable for areas with complete rock formations and sufficient water sources. Mud is a widely used drilling fluid. It is mainly suitable for unstable rock formations with loose walls, developed cracks, easy to collapse and drop blocks, and swelled and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/512C09K8/88C08F265/04C08F220/56C08G59/44
CPCC09K8/035C09K8/512C08F265/04C08G59/44C09K2208/28C08F220/56
Inventor 张达明孙黎孙保勇
Owner 晋州市茂源钻采技术开发有限公司