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Natural polymer fluid loss reducer for drilling fluid and its preparation method and application

A technology of natural polymer and fluid loss control agent, which is applied in the field of natural polymer fluid loss control agent and its preparation, can solve environmental pollution and other problems, and achieve the effects of no biological toxicity, excellent temperature resistance, and strong fluid loss control ability

Active Publication Date: 2016-03-23
北京培康佳业技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the residual monomers in these products, such as residual phenol and formaldehyde in phenolic resin fluid loss reducers, cause great pollution to the environment

Method used

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  • Natural polymer fluid loss reducer for drilling fluid and its preparation method and application
  • Natural polymer fluid loss reducer for drilling fluid and its preparation method and application
  • Natural polymer fluid loss reducer for drilling fluid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 20 parts of water by weight, under stirring respectively 80 parts of konjac gum, 15 parts of soda ash, 5 parts of urea, 6 parts of glycerin, 35 parts of 95% ethanol are joined in the kneader, pass into steam in the kneader jacket, The temperature was kept at 80°C for 3 hours. After completion of the reaction, pour cold water into the jacket, discharge the material after cooling, dry at 110° C. for 4.5 hours and pulverize to obtain the natural polymer fluid loss reducer for drilling fluid of this embodiment.

Embodiment 2

[0022] Get 15 parts of water by weight ratio, under stirring, respectively 75 parts of konjac gum, 17 parts of soda ash, 6 parts of urea, 7 parts of glycerin, 40 parts of 95% ethanol are joined in the kneader, pass into steam in the kneader jacket, The temperature was maintained at 85°C for 4 hours. After completion of the reaction, pour cold water into the jacket, discharge the material after cooling, dry at 100° C. for 6 hours, and pulverize to obtain the natural polymer fluid loss reducer for drilling fluid of this embodiment.

Embodiment 3

[0024] Get 25 parts of water by weight, under stirring respectively 90 parts of konjac gum, 20 parts of soda ash, 4 parts of urea, 5 parts of glycerin, 30 parts of 95% ethanol are joined in the kneader, pass into steam in the kneader jacket, The temperature was maintained at 90°C for 3.5 hours. After completion of the reaction, pour cold water into the jacket, discharge the material after cooling, dry at 120° C. for 4 hours and pulverize to obtain the natural polymer fluid loss reducer for drilling fluid of this embodiment.

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Abstract

The invention provides a natural polymer filtrate loss reducer used for drilling fluid and a preparation method and application of the natural polymer filtrate loss reducer. The preparation method includes the following steps that by weight, 70-100 parts of konjac glucomannan, 15-20 parts of sodium carbonate, 4-6 parts of urea, 5-8 parts of glycerin, 30-40 parts of alcohol and 10-30 parts of water are stirred and then added into a kneading machine, react for 3 hours-4.5 hours at normal pressure and at the temperature of 70 degrees-90 degrees, and are cooled, then discharged, dried and smashed to obtain the natural polymer filtrate loss reducer used for the drilling fluid. The synthetic method for the natural polymer filtrate loss reducer used for the drilling fluid is simple, and the natural polymer filtrate loss reducer is high in filtrate loss reduction capacity and free of biotoxicity and pollution to the environment. The obtained natural polymer filtrate loss reducer is added into the drilling fluid of an oilfield, and therefore obtained drilling fluid has the advantages of being small in filtrate loss, free of biotoxicity and pollution to the environment and the like.

Description

technical field [0001] The present invention relates to a fluid loss reducer for oilfield drilling fluid and its preparation method and application, in particular to a non-biologically toxic natural polymer fluid loss reducer for oilfield drilling fluid and its preparation method and application . Background technique [0002] Fluid loss reducer for drilling fluid is a mud treatment agent used to ensure the stability of drilling fluid performance, reduce the loss of harmful liquid to the formation, stabilize the well wall and ensure regular well diameter. With the increasingly complex formations encountered, natural and natural modified fluid loss control agents can no longer meet the needs of drilling. For example, cellulose products represented by sodium carboxymethyl cellulose have poor salt resistance in drilling fluids. After being polluted by salt and calcium, the viscosity of drilling fluids increases significantly, and the effect of reducing fluid loss decreases sig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K8/20
Inventor 姚少全
Owner 北京培康佳业技术发展有限公司