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Solid polyalcohol for oil field drilling fluid and its preparation method and application

A solid polymerization and drilling fluid technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as well wall collapse, inconvenience in transportation and use, and geological logging effects, etc., and achieve good results. The effect of oil and gas layer protection, low fluorescence level and low cloud point

Active Publication Date: 2015-11-18
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 product obtained in the prior art has a high fluorescence level, which affects geological logging, has a high cloud point, and is not strong in inhibition, and cannot well solve the problem of well wall collapse; and the obtained product is liquid, which is difficult for transportation and use. cause inconvenience

Method used

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  • Solid polyalcohol for oil field drilling fluid and its preparation method and application
  • Solid polyalcohol for oil field drilling fluid and its preparation method and application
  • Solid polyalcohol for oil field drilling fluid and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 1 part of stearylamine and 6 parts of KOH into the reaction kettle by weight ratio, fill with nitrogen to remove oxygen, then add 400 parts of ethylene oxide and 260 parts of propylene oxide, keep the pressure at 0.3MPa, and heat up to 155°C , reacted for 3.5 hours, and after cooling, the solid polymeric alcohol for drilling fluid of this embodiment was obtained.

Embodiment 2

[0024] Add 1.2 parts of palmitamine and 7 parts of KOH into the reaction kettle by weight ratio, fill with nitrogen to remove oxygen, then add 410 parts of ethylene oxide and 280 parts of propylene oxide, maintain the pressure at 0.2MPa, and heat up to 160°C , reacted for 4 hours, and after cooling, the solid polymeric alcohol for drilling fluid of this embodiment was obtained.

Embodiment 3

[0026] Take 0.6 part of stearylamine, 0.3 part of palmityl amine, 0.3 part of laurylamine and 7.5 parts of KOH in the reaction kettle by weight, fill with nitrogen to remove oxygen, then add 450 parts of ethylene oxide and 300 parts of propylene oxide, The pressure was maintained at 0.2 MPa, heated to 156° C., reacted for 4.5 hours, and cooled to obtain the solid polymeric alcohol for drilling fluid of this example.

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Abstract

The invention provides solid polyalcohol for oilfield drilling fluid and a preparation method and application thereof. The method comprises the steps of mixing aliphatic amine, epoxyethane and epoxypropane according to the weight ratio of (1-1.4): (390-450): (260-300), and reacting for 3.5-4.5 hours in the presence of a catalyst at the pressure of 0.2-0.4MPa and the temperature of 155-160 DEG C, thereby obtaining the product, namely the solid polyalcohol for the drilling fluid. The polyalcohol provided by the invention is solid and can be applied to exploratory wells and development wells; compared with the prior art, the polyalcohol has the advantages of good lubricating property, low turbidity point, strong inhibitive ability, low fluorescence level, no biological toxicity, no environmental pollution, convenience in transportation and use, strong compatibility, relatively strong filtration reduction capability and the like.

Description

technical field [0001] The invention relates to a polymeric alcohol for oilfield drilling fluid and its preparation method and application, in particular to a solid polymeric alcohol which can be used as oilfield drilling fluid, its preparation method and related applications. Background technique [0002] With the development of drilling technology, the number of wells drilled in highly deviated wells, deep wells and water-sensitive shale formations that are prone to collapse has increased significantly, and the problems of lubrication and collapse prevention in drilling fluid technology have become increasingly prominent. For a long time, oil-based drilling fluids have been mostly used to drill into water-sensitive formations to solve problems such as shale stability, differential pressure sticking, and bit inclusions. However, oil-based drilling fluids pollute the environment and affect exploration well operations, resulting in high costs. [0003] In order to solve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C09K8/035
Inventor 姚少全
Owner 北京培康佳业技术发展有限公司
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