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Water-in-oil type polyamide emulsifier for drilling fluid and synthetizing method thereof

A water-in-oil type, synthetic method technology, applied in chemical instruments and methods, drilling compositions, preparation of carboxylic acid amides, etc. Small, solve the effect of poor rheological properties and good rheological properties

Inactive Publication Date: 2014-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of poor rheological properties and lower demulsification voltage of the existing emulsifier for drilling fluid under high temperature conditions, and provides a water-in-oil polyamide emulsifier for drilling fluid and its synthesis method

Method used

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  • Water-in-oil type polyamide emulsifier for drilling fluid and synthetizing method thereof
  • Water-in-oil type polyamide emulsifier for drilling fluid and synthetizing method thereof

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specific Embodiment approach 1

[0018] Specific Embodiment 1: In this embodiment, a water-in-oil polyamide emulsifier for drilling fluid is prepared from N-methyl-1,3-propylenediamine, oleic acid and maleic anhydride as raw materials. The name is N,N-methylmaleic acid ester alkyl amidopropyl tertiary amine, and the general structure is HOOC-CH=CH-CO-N(CH 3 )-(CH 2 ) 3 -NH-CO-R; where R is CH 3 (CH 2 ) 2 -CH=CH-(CH 2 ) 7 -.

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the synthetic method of the water-in-oil type polyamide emulsifier for the drilling fluid is carried out according to the following steps:

[0020] 1. Add N-methyl-1,3-propanediamine and oleic acid into the three-necked bottle, fix the three-necked bottle in the electric heating mantle, insert the stirring rod into the straight mouth of the three-necked bottle, fix the stirring device, three-necked The other two ports of the bottle are respectively equipped with a thermometer and a water-splitting condensing device, and the temperature is raised from room temperature to 100°C to 110°C under the condition of stirring, and after keeping for 1 hour, the temperature is raised from 100°C to 110°C to 150°C ~170°C, keep warm for 10h~17h to obtain N-methylalkylamidopropyl secondary amine; the molar ratio of N-methyl-1,3-propanediamine to oleic acid is (0.6~1.2):1 ; The structural for...

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the temperature is raised from 110°C to 160°C. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a water-in-oil type polyamide emulsifier for drilling fluid and a synthetizing method thereof and relates to a water-in-oil type emulsifier and a synthetizing method thereof. The emulsifier is used for solving the problems that the rheological property of existing emulsifiers for the drilling fluid is worse and the emulsion-breaking voltage is reduced at a high temperature. The water-in-oil type polyamide emulsifier for the drilling fluid is made from N-methyl-1, 3-propanediamine, oleic acid and maleic anhydride as raw materials; the chemical name of the emulsifier is N, N-methyl maleic carboxylate alkylamide propyl tertiary amine; the structural general formula of the emulsifier is HOOC-CH=CH-CO-N(CH3)-(CH2)3-NH-CO-R, wherein the R is CH3(CH2)2-CH=CH-(CH2)7-. The synthetizing method comprises the following steps: mixing, condensing and back flowing the N-methyl-1, 3-propanediamine and the oleic acid in a certain proportion to obtain an intermediate product; heating and stirring the intermediate product and the maleic anhydride to obtain an end product. The emulsifier serves as the emulsifier for the drilling fluid.

Description

technical field [0001] The invention relates to a water-in-oil emulsifier and a synthesis method thereof. Background technique [0002] Drilling fluid or drilling mud, as a circulating fluid for drilling operations, facilitates the removal of cuttings generated from the wellhead during drilling, cooling and lubricating the drill bit, thereby reducing the possibility of blowout. Among them, oil-based drilling fluid has strong anti-pollution ability, good lubricity, and strong inhibition, which is conducive to maintaining the stability of the well wall and protecting oil and gas layers to the maximum extent; at the same time, oil-based drilling fluid has stable performance, easy maintenance, and strong temperature resistance , good thermal stability. It has become an important means of drilling difficult high-temperature deep wells, offshore drilling, highly deviated directional wells, horizontal wells, various complex well sections and reservoir protection. [0003] One of ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/36C07C231/02C07C233/38
CPCC09K8/035C07C231/02C09K8/36C07C233/38
Inventor 徐用军李小莹刘永贵田明段百超
Owner HARBIN INST OF TECH
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