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Anti-temperature starch composition for drilling liquid and preparation method thereof

A drilling fluid and composition technology, applied in the field of starch composition and its preparation, can solve the problems of low reaction conversion rate, high requirements for reaction equipment, and high cost, and achieve the effects of simple production process, improved application range, and mild conditions

Inactive Publication Date: 2008-09-03
北京中科日升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet preparation process is a traditional process, which is widely used by many manufacturers. The advantages of this process are mild reaction conditions and simple production equipment. Its disadvantages are mainly the large investment in post-washing and drying equipment, prominent wastewater problems, and low reaction conversion rate.
The main advantages of the organic solvent method are no three wastes, high reaction conversion rate, and stable product quality. The disadvantages are high cost, and the organic solvent is flammable, explosive and unsafe.
The dry preparation process has the advantages of no post-treatment, no three wastes, simple process, and short reaction cycle. The disadvantages are low reaction conversion rate, high requirements for reaction equipment, and unstable product quality.
[0004] In summary, the current application of temperature-resistant starch for drilling fluids is limited, and most of its production processes are not perfect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A temperature-resistant starch composition for drilling fluid, which is prepared from the following raw materials: starch, catalyst, quaternary ammonium salt type cationic surfactant and crosslinking agent; the starch is composed of potato starch, tapioca starch and corn Starch composition, its parts by weight ratio is potato starch: tapioca starch: corn starch=30:20:10; the ratio of parts by weight of the catalyst to starch is 5:100; the quaternary ammonium salt type cationic surfactant The ratio of parts by weight and starch is 1:100; the ratio of parts by weight of the crosslinking agent and starch is 0.01:100; the catalyst is NaOH; the quaternary ammonium salt type cationic surfactant is dodecyl Dimethyl benzyl ammonium chloride; the cross-linking agent is sodium trimetaphosphate.

[0040] A method for preparing a temperature-resistant starch composition for drilling fluid of the present invention comprises the following steps:

[0041] 1) select following raw mater...

Embodiment 2

[0045] A temperature-resistant starch composition for drilling fluid, which is prepared from the following raw materials: starch, catalyst, quaternary ammonium salt type cationic surfactant and crosslinking agent; the starch is composed of potato starch, tapioca starch and corn Starch composition, its parts by weight ratio is potato starch: tapioca starch: corn starch=80:60:50; the ratio of parts by weight of the catalyst to starch is 30:100; the quaternary ammonium salt type cationic surfactant The weight and number ratio of starch and starch is 20: 100; the weight and number ratio of the crosslinking agent and starch is 0.6: 100; the catalyst is KOH; the quaternary ammonium salt type cationic surfactant is tetradecyl Dimethyl benzyl ammonium chloride; the crosslinking agent is epichlorohydrin.

[0046] A method for preparing a temperature-resistant starch composition for drilling fluid of the present invention comprises the following steps:

[0047] 1) select following raw ...

Embodiment 3

[0051] A temperature-resistant starch composition for drilling fluid, which is prepared from the following raw materials: starch, catalyst, quaternary ammonium salt type cationic surfactant and crosslinking agent; the starch is composed of potato starch, tapioca starch and corn Starch composition, its parts by weight ratio is potato starch: tapioca starch: cornstarch=55:40:30; The ratio of parts by weight of the catalyst to starch is 17:100; The quaternary ammonium salt type cationic surfactant The ratio of parts by weight and starch is 11:100; the ratio of parts by weight of the crosslinking agent to starch is 0.3:100; the catalyst is Ca(OH) 2 ; The quaternary ammonium salt cationic surfactant is octadecyl dimethyl benzyl ammonium chloride; the cross-linking agent is phosphorus oxychloride.

[0052] A method for preparing a temperature-resistant starch composition for drilling fluid of the present invention comprises the following steps:

[0053] 1) select following raw mate...

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Abstract

A temperature tolerant starch composition for well drilling liquid and method of preparing the same, which includes starch, catalyst, cationic reagent and cross linker, wherein starch comprises potato starch, cassava starch, corn starch, with a weight ratio of 30-80:20-60:10-50; weight ratio between catalyst and starch is 5-30:100, weight ratio between cationic reagent and starch is 1-20:100, and weight ratio between cross linker and starch is 0.01-0.6:100. The inventive temperature tolerant starch composition for well drilling liquid not only inhibits yeastiness thereof effectively and enhances tolerant temperature from 120 DEG C to 150 DEG C, so that application range of the starch is widen, but also protects environment because of biodegradability. Moreover, the preparation is simple in process, mild in reaction condition, high in conversion, low in cost, without subsequent process and waste, which makes it economic and environment protective.

Description

technical field [0001] The invention relates to a starch composition and a preparation method thereof, in particular to a temperature-resistant starch composition for drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid is an important material for drilling engineering. It is directly related to the quality of drilling, the speed, the amount of oil production, and even the success or failure of drilling engineering. Therefore, drilling fluid is known as the "blood" of drilling. . Drilling fluid is divided into water-based drilling fluid and oil-based drilling fluid, water-based drilling fluid is a multi-phase dispersion system composed of bentonite, water (or salt water) and various treatment agents, and the drilling fluid produced by the present invention is used for temperature-resistant Starch is one of the treatment agents in water-based drilling fluid. Drilling fluid starch has been used in oil drilling for a long time. The pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/08C08L3/02C08K5/19C08J3/24C08K3/32C08K5/15C08K5/20
Inventor 孙保明史敬华冯理琼
Owner 北京中科日升科技有限公司
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