A kind of plugging agent for drilling fluid and preparation method thereof

A technology of plugging agent and drilling fluid, which is applied in the field of plugging agent for drilling fluid and its preparation, and achieves the effects of less investment in equipment, mild preparation process conditions, and low production costs

Active Publication Date: 2018-03-16
HEBEI GUANGDA PETROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The plugging agent of this patent application has good water absorption and high temperature resistance, but its viscosity and elasticity need to be further improved

Method used

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  • A kind of plugging agent for drilling fluid and preparation method thereof
  • A kind of plugging agent for drilling fluid and preparation method thereof

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings. The protection scope of the present invention is not limited to the embodiments, and any changes made by those skilled in the art within the scope defined in the claims also belong to the protection scope of the present invention.

[0031] The plugging agent for drilling fluid of the present invention, its components by weight percentage include: acrylamide 23, 2-acrylamide-2-methylpropanesulfonic acid (AMPS) 0.5, acryloyloxyethyltrimethylammonium chloride ( DAC) 2.3, soda ash 0.9, high viscoelasticity modifier polyvinylpyrrolidone 7.0 and cross-linking agent trimethylolpropane tris(3-aziridinyl propionate) 0.002, the rest is deionized water. The conductivity of deionized water is 19µs / cm.

[0032] The preparation process of the lost circulation agent for drilling fluid of the present invention is as follows figure 1 shown, including the following...

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Abstract

The invention relates to a plugging agent for drilling fluid and a preparation method thereof. The components of the treatment agent include: 20-25 acrylamide, 0.4-0.5 2-acrylamide-2-methylpropanesulfonic acid, and 0.4-0.5 acrylamide Oxyethyltrimethylammonium chloride 2.0-2.5, soda ash 0.8-1.0, high viscoelastic modifier 6.3-7.5 and cross-linking agent 0.001‑0.003, the rest is deionized water. Acrylamide, soda ash and water are polymerized and hydrolyzed into polyacrylamide in a polymerization tank, and then polyacrylamide and other additives are placed in a kneader for modification. The preparation of the plugging agent includes batching, polymerization-hydrolysis reaction, kneading modification, drying, granulation, milling, screening, inspection and packaging processes. In the invention, the multi-component copolymerized high molecular organic matter is modified by using a high viscoelastic modifier to make it have good viscosity, elasticity and plugging effect. The preparation condition of the present invention is moderate, has no pollution to the environment, less equipment investment and low production cost.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemicals, and relates to a plugging agent for drilling fluid and a preparation method thereof. Background technique [0002] Lost circulation is a common phenomenon in the drilling process, and the time spent in dealing with lost circulation accounts for about 10% of the drilling time. The common way to prevent leakage is to add materials of different particle sizes to the drilling fluid to form bridges or clusters in micro-fractures or pores to prevent the leakage of drilling fluid. When leakage occurs during drilling, effective plugging measures must be taken. In order to solve the problems faced by plugging, people use water-absorbent resin for plugging construction. Water-absorbent resin is a functional polymer material containing hydrophilic groups and cross-linked structures. It has good toughness and deformation ability. Under the action of pressure difference, it can be deformed and sq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/44C08F291/12C08F220/58C08F220/34C08F220/56C08F8/12
CPCC09K8/035C09K8/426C09K8/44C08F8/12C08F120/56C08F291/12C08F220/585C08F220/34
Inventor 李尚坤郭九成郭杨高国英罗前程刘君君张宇航张星赤颜峰
Owner HEBEI GUANGDA PETROCHEM
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