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A kind of extruded and expanded modified starch fluid loss reducer and preparation method thereof

A technology of extruding and extruding fluid loss control agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex process, harsh reaction conditions, high production cost, etc., and achieve simple and stable process, easy industrialization, Excellent filtration loss reduction effect

Active Publication Date: 2016-06-01
广西农垦明阳生化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the starch products used in oil drilling fluid fluid loss reduction have problems such as complex process, harsh reaction conditions, and the use of a large amount of organic solvents, which lead to problems such as difficult process, large investment in equipment, environmental protection, and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use the model SX3000-100 extrusion extruder (Shandong Saixin Extrusion Machinery Co., Ltd.), add 10 kg of tapioca starch with a moisture content of 10-15% in order in the mixing hopper, and add an appropriate amount of water to make the tapioca starch moisture content 18 %, add 0.01 kilogram of sodium carbonate, 0.05 kilogram of sodium hypochlorite again, stir 5 minutes to material evenly; Start the heating system and the cooling system of equipment, adjust the reaction temperature 80 ℃ of material, keep the reaction time by controlling the discharge speed and be 2 minutes, feed Material, to obtain bulk puffed products; unloading, block products into the pulverizer, crushed, screened, packaged to obtain finished products.

Embodiment 2

[0021] Add 10 kg of tapioca starch with a content of 10-15% in order in the mixing hopper, add appropriate amount of water to make the water content of tapioca starch 20%, then add 0.05 kg of sodium carbonate and 0.3 kg of sodium hypochlorite, and stir for 10 minutes until the material is uniform ;Start the heating system and cooling system of the equipment, adjust the reaction temperature of the material to 120°C, keep the reaction time at 30 minutes by controlling the discharge speed, and feed the material to obtain a block-shaped puffed product; unload the block product into the crushed In the machine, the finished product is obtained through crushing, screening and packaging.

Embodiment 3

[0023] Add 10 kg of tapioca starch with a content of 10-15% in order in the mixing hopper, add appropriate amount of water to make the water content of tapioca starch 22%, then add 0.03 kg of sodium carbonate and 0.1 kg of hydrogen peroxide, and stir for 10 minutes until the material is uniform ;Start the heating system and cooling system of the equipment, adjust the reaction temperature of the material to 100°C, keep the reaction time at 10 minutes by controlling the discharge speed, feed the material, and obtain a block-shaped puffed product; unload, put the block-shaped product into crushing In the machine, the finished product is obtained through crushing, screening and packaging.

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PUM

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Abstract

The invention provides an extrusion modified starch filtrate reducer with high quality and low price. The extrusion modified starch filtrate reducer is obtained through the following technical scheme: extrusion equipment is adopted, cassava starch is used as raw material, a proper amount of water and a specific catalyst and an oxidant are added into the cassava starch, homogeneous material is formed in a stirring hopper, and chemical denaturation and physical denaturation are performed at the same time through the extrusion equipment, so that the extrusion modified starch filtrate reducer is obtained. The extrusion modified starch filtrate reducer has the advantages that the technology is simple and environmentally friendly, and the extrusion modified starch filtrate reducer meets the APISpec13A standard.

Description

technical field [0001] The invention relates to a fluid loss control agent, in particular to a modified starch fluid loss control agent prepared by an extrusion expansion oxidation method. Background technique [0002] During the drilling process, the invasion of the filtrate of the drilling fluid into the formation will cause the shale to hydrate and expand, and in severe cases, it will lead to instability of the wellbore and various downhole complex situations. Low permeability, flexible, thin and dense filter cake can reduce the fluid loss of drilling fluid as much as possible, so as to stabilize the well wall and protect oil and gas layers. Therefore, fluid loss reducer has become one of the drilling fluid treatment agents with the largest production and sales. As a fluid loss control agent, modified starch has the advantages of natural availability, degradability, high quality and low price. [0003] There is also some research on modified starch as a fluid loss reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/18C09K8/035
Inventor 冯琳潘瑞坚梁著棋玉琼广甘振登朱彩丽刘群艳黄家满
Owner 广西农垦明阳生化有限公司