Preparation method of polyalcohol anti-collapse inhibitor for environment-friendly drilling fluid salt slurry system

A technology of inhibitors and polyalcohols, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., to achieve the effects of system stability, reduced investment, and reduced requirements for synthetic reactions

Inactive Publication Date: 2020-07-28
扬州润达油田化学剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the development of polyalcohol drilling fluids has a history of nearly 20 years, there are still many controversies in the theoretical research on polyalcohol treatment agents, especially the use of polyalcohol is generally compounded with salt, and the negative effects of salt Obviously, the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh ethylene oxide and ethylene glycol respectively according to the mass ratio of 1:2, the total of the two is 100g, stir it evenly at room temperature, slowly pour it into a stainless steel high-pressure reaction tank, and add 0.1% KOH aqueous solution as a catalyst , the amount of catalyst is 0.5g, nitrogen protection is continuously introduced, the reaction temperature is controlled at 120-125°C, the pressure is constant at 0.3Mpa, and stirring is continued. After 60 minutes of reaction, the safety pressure relief valve is opened to remove the residual pressure in the high-pressure reactor, and the synthetic The product was poured out, and the by-product and excess unreacted ethylene glycol were washed with distilled water. After removing the water, 50 g of triethylene glycol was added and mixed to obtain 130 g of polyalcohol anti-slump inhibitor 1#, with a synthesis rate of 80%.

[0028] Using the drilling fluid fluid loss meter GGS42-2A that conforms to the perfo...

Embodiment 2

[0030] Weigh propylene oxide and triethylene glycol respectively according to the mass ratio of 1:2. The total of the two is 100g. After stirring at room temperature, slowly pour it into a stainless steel high-pressure reaction tank, and add 0.1% mass fraction of chloroplatinic acid-KOH Catalyst, the amount of catalyst is 0.5g, nitrogen protection is continuously introduced, the reaction temperature is controlled at 100-115°C, the pressure is constant at 0.25Mpa, after uniform stirring for 1 hour, the safety relief valve is opened to remove the residual pressure in the high-pressure reactor, and the synthetic product Pour it out, wash by-products and excess unreacted triethylene glycol with distilled water, and obtain 70 g of polyalcohol anti-slump inhibitor 2# after water removal, with a synthesis rate of 70%.

[0031] Using the drilling fluid fluid loss meter GGS42-2A that conforms to the performance indicators in SY / T5380, the fluid loss of API freshwater slurry is 15ml, the...

Embodiment 3

[0033]Weigh ethylene oxide, propylene oxide and triethylene glycol respectively according to the mass ratio of 1:1:1. The total of the three is 100g. After stirring at room temperature, slowly pour it into a stainless steel high-pressure reaction tank, and add 0.1% Fractional chloroplatinic acid-NaOH catalyst, the amount of catalyst is 0.5g, nitrogen protection is continuously introduced, the reaction temperature is controlled at 115°C, the pressure is constant at 0.25Mpa, after uniform stirring for 1 hour, the safety pressure relief valve is opened to remove the residual gas in the high-pressure reactor. Press down, pour out the synthetic product, use distilled water and 0.1% concentration of hydrochloric acid solution and NaOH solution to wash by-products and excess unreacted triethylene glycol to neutral pH value, obtain 85g of polymeric alcohol anti-slump inhibitor 3 after removing water #, the synthesis rate is 85%.

[0034] Using the drilling fluid fluid loss meter GGS42...

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Abstract

The invention relates to a polyalcohol anti-collapse inhibitor for a drilling fluid salt slurry system and a preparation method of the polyalcohol anti-collapse inhibitor for the environment-friendlydrilling fluid salt slurry system. The preparation method comprises the following preparation steps: (1) weighing ethylene oxide or/and propylene oxide, ethylene glycol or glycerol as reactants, uniformly stirring the components at room temperature, and slowly pouring the mixture into a high-pressure reaction kettle; (2) adding a proper amount of catalyst, continuously introducing nitrogen for protection, controlling the reaction temperature at 75-125 DEG C and the pressure at 0.1-0.3 MPa, and continuously stirring the components; (3) after reaction for 60 minutes, opening a safety relief valve, removing residual pressure in the high-pressure reaction kettle, and discharging a synthetic product everywhere; (4) washing the by-product and redundant reactants with distilled water or a hydrochloric acid solution or NaOH solution with the concentration of 0.1% until the pH value is neutral; and (5) removing water from the product obtained in the step (4) to obtain the polyalcohol anti-collapse inhibitor. The product has excellent anti-sloughing inhibition performance, and the lubricity of the drilling fluid is remarkably improved.

Description

technical field [0001] The invention relates to a polyalcohol anti-slump inhibitor for a drilling fluid salt slurry system, and a preparation method of a polyalcohol anti-slump inhibitor for an environment-friendly drilling fluid salt slurry system. Background technique [0002] With the continuous development of petroleum exploration and development, in order to find more petroleum resources, it gradually develops from shallow wells and simple wells to deep wells, ultra-deep wells and complex wells. During this development process, problems such as pipe sticking and collapse caused by the dispersion of shale hydration and hydration have caused losses of tens of billions of dollars to drilling companies every year. Therefore, the development of new drilling fluid treatment agents with strong inhibition and stable borehole wall has always been one of the main development directions of drilling fluids. [0003] Polyalcohol drilling fluid is a new type of environmentally frien...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/44C08G65/26C08G77/46
CPCC09K8/035C09K8/44C09K8/426C08G65/2609C08G65/269C08G65/2687C08G65/2648C08G65/266C08G65/2624C08G77/46C09K2208/34
Inventor 安进杨童
Owner 扬州润达油田化学剂有限公司
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