Emulsified asphalt for drilling fluids

Abstract

The invention discloses an emulsified asphalt for drilling fluids, and belongs to the technical field of the oilfield chemical engineering. The emulsified asphalt is composed of 75-80mass% of petroleum asphalt, 5-10mass% of extreme pressure lubricating oil, 0.8-1.2mass% of a dispersant IW, 0.8-1.2mass% of fluorocarbon FC-3b, 0.8-1.2mass% of polyether 330N, 10mass% of diesel oil, 0.8-1.2mass% of polyethylene glycol, and 0.8-1.2mass% of a quaternary ammonium salt. A preparation method of the emulsified asphalt comprises a step of fully stirring the above raw materials at normal temperature for uniform mixing, and a step of emulsifying by a colloid mill. The emulsified asphalt is a pure oil base, has a good anti-sloughing lubrication property, has an increased temperature resistance, has no water, and is suitable for water-based drilling fluids and organic salt weighting drilling fluids. The emulsified asphalt is convenient to transport, store and use in winter.

Description

technical field

[0001] The invention relates to emulsified asphalt for drilling fluid, which belongs to the technical field of oil field chemical industry. Background technique

[0002] For a long time, in order to prevent sticking and underpressure accidents during the drilling process, a large amount of crude oil has to be mixed into the drilling fluid. Although crude oil has good lubricity and can meet the requirements of on-site construction, there are major safety hazards in various links such as transportation, use, and storage, which increase the cost of risk prevention and management. Laboratory research and field application show that using emulsified asphalt instead of crude oil can improve mud performance in many aspects under the premise of ensuring transportation safety. Filtration and other effects, the drilling fluid has good fluidity, no stickiness, easy maintenance and treatment, and can be used instead of sulfonated asphalt, which can effectively reduce th...

Examples

Embodiment 1

[0027] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 0.98 g / cm 3 80% of petroleum asphalt,

[0028] Extreme pressure lubricating oil 5%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0029] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0030] The water content of petroleum asphalt is less than 2%.

[0031] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

Embodiment 2

[0033] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 0.98 g / cm 3 75% of petroleum asphalt,

[0034] Extreme pressure lubricating oil 10%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0035] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0036] The water content of petroleum asphalt is less than 2%.

[0037] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

Embodiment 3

[0039] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 1.01 g / cm 3 76% of petroleum asphalt,

[0040] Extreme pressure lubricating oil 9%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0041] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0042] The water content of petroleum asphalt is less than 2%.

[0043] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

technical field

[0001] The invention relates to emulsified asphalt for drilling fluid, which belongs to the technical field of oil field chemical industry. Background technique

[0002] For a long time, in order to prevent sticking and underpressure accidents during the drilling process, a large amount of crude oil has to be mixed into the drilling fluid. Although crude oil has good lubricity and can meet the requirements of on-site construction, there are major safety hazards in various links such as transportation, use, and storage, which increase the cost of risk prevention and management. Laboratory research and field application show that using emulsified asphalt instead of crude oil can improve mud performance in many aspects under the premise of ensuring transportation safety. Filtration and other effects, the drilling fluid has good fluidity, no stickiness, easy maintenance and treatment, and can be used instead of sulfonated asphalt, which can effectively reduce th...

Examples

Embodiment 1

[0027] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 0.98 g / cm 3 80% of petroleum asphalt,

[0028] Extreme pressure lubricating oil 5%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0029] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0030] The water content of petroleum asphalt is less than 2%.

[0031] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

Embodiment 2

[0033] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 0.98 g / cm 3 75% of petroleum asphalt,

[0034] Extreme pressure lubricating oil 10%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0035] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0036] The water content of petroleum asphalt is less than 2%.

[0037] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

Embodiment 3

[0039] A kind of emulsified asphalt for drilling fluid, the raw material is composed of the following substances according to the mass percentage: the density is 1.01 g / cm 3 76% of petroleum asphalt,

[0040] Extreme pressure lubricating oil 9%, dispersant IW 1%, fluorocarbon FC-3b 1%, polyether 330N 1%, diesel oil 10%, polyethylene glycol 1%, glycidyltrimethylammonium chloride 1% . The water content of petroleum asphalt is less than 2%.

[0041] The preparation method is: fully stir and mix at room temperature, and then emulsify through a colloid mill.

[0042] The water content of petroleum asphalt is less than 2%.

[0043] The extreme pressure lubricating oil is composed of fatty acid methyl ester and oleic acid methyl ester, the mass content of fatty acid methyl ester is 80%, and the mass fraction of oleic acid methyl ester is 20%.

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