Microcapsule-type speed-increasing and anti-seize lubricant and preparation method thereof

A technology for microcapsules and lubricants, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of increased cost, inability to achieve fixed-point lubrication, and excessive torque, and achieve the effect of reducing drilling costs and preventing sticking. Good, torque-reducing effect

Active Publication Date: 2018-12-25
BETTER OILFIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional liquid or solid lubricants mainly reduce frictional resistance by diluting or interfering with the properties of the drilling fluid, so this will change the original properties of the drilling fluid, and it is necessary to add other chemical agents to restore the original properties of the drilling fluid. On the one hand, it will affect the drilling fluid. stability of the drilling fluid, on the other hand, the cost of maintenance and treatment of the drilling fluid is increased
[0004] Conventional liquid or solid lubricants act on the entire wellbore and friction points, and cannot play the role of fixed-point lubrication, and the concentration of conventional lubricants will continue to decrease over time, so it is necessary to increase the overall amount of lubricants to meet the lubrication requirements. And when the concentration is higher, it will have a negative impact on the rheology of the drilling fluid
[0005] The mechanism and mode of action of conventional lubricants determine that there are many limitations, such as pipe sticking, excessive resistance, excessive torque, damage to mud rheology, low drilling speed, and prolonged drilling downtime, etc. These will lead to an increase in cost
[0006] In addition, commonly used mineral oil lubricants also have problems such as toxicity, high fluorescence, and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare microcapsule type speed-increasing anti-seize lubricant according to the following steps:

[0028] (1) Preparation of lubricating oil: Prepare the following raw materials in parts by mass: 30 parts of plant asphalt, 20 parts of sorbitan diester, 40 parts of B20 biodiesel, 10 parts of polyoxyethylene lauryl ether; Environmentally friendly lubricating oil is prepared by compounding raw materials;

[0029] (2) Preparation of capsule wall prepolymer: Under the protection of nitrogen, add a certain amount of starch and distilled water into a four-neck flask, gelatinize at a temperature above 80°C for 30 minutes, and at the same time stir it electrically to make it uniform, and control the reaction temperature to 40°C. Then add 2-acrylamide-2-methylpropanesulfonic acid, dimethyl diallyl ammonium chloride and ammonium cerium nitrate successively, stir and react for 2 hours, and obtain a total concentration of 3% capsule wall prepolymer; wherein , The mass ratio of dim...

Embodiment 2

[0032] Prepare microcapsule type speed-increasing anti-seize lubricant according to the following steps:

[0033] (1) Preparation of lubricating oil: Prepare the following raw materials in parts by mass: 30 parts of plant asphalt, 20 parts of sorbitan diester, 40 parts of B20 biodiesel, and 10 parts of polyoxyethylene lauryl ether; The raw materials are compounded to produce environment-friendly lubricating oil;

[0034] (2) Preparation of capsule wall prepolymer: Under the protection of nitrogen, add a certain amount of starch and distilled water into a four-neck flask, gelatinize at a temperature above 80°C for 30 minutes, and at the same time stir it electrically to make it uniform, and control the reaction temperature to 40°C. Then add 2-acrylamide-2-methylpropanesulfonic acid, dimethyl diallyl ammonium chloride and ammonium cerium nitrate successively, stir and react for 2 hours, and obtain a total concentration of 3% capsule wall prepolymer; wherein , The mass ratio of ...

Embodiment 3

[0037] Prepare microcapsule type speed-increasing anti-seize lubricant according to the following steps:

[0038] (1) Preparation of lubricating oil: Prepare the following raw materials in parts by mass: 25 parts of plant asphalt, 15 parts of sorbitan monooleate, 50 parts of B20 biodiesel, and 8 parts of lauryl polyvinyl ether; using the above raw materials Environment-friendly lubricating oil is prepared by compounding method;

[0039] (2) Preparation of capsule wall prepolymer: Under the protection of nitrogen, add a certain amount of starch and distilled water into a four-neck flask, gelatinize at a temperature above 80°C for 30 minutes, and at the same time stir it electrically to make it uniform, and control the reaction temperature to 35°C. Then add 2-acrylamide-2-methylpropanesulfonic acid, dimethyl diallyl ammonium chloride and ammonium cerium nitrate successively, stir and react for 1.5 hours to obtain a total concentration of 5% capsule wall prepolymer; wherein , Th...

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Abstract

The invention discloses a microcapsule-type speed-increasing and anti-seize lubricant, which is composed of several microcapsules. The microcapsules include a capsule wall and a capsule core placed in the capsule wall. The mechanical strength of the capsule wall is 100- 1000g / cm2, the capsule core is lubricating oil. The invention also discloses a preparation method of a microcapsule-type speed-increasing and anti-seize lubricant, which includes the following steps: preparing lubricating oil by a compounding method, and the raw materials include asphalt, polyol nonionic emulsifier, biodiesel, and surfactant; The capsule wall is prepared, and the raw materials include starch, 2-acrylamide-2-methylpropanesulfonic acid, dimethyl diallyl ammonium chloride and ammonium cerium nitrate; and a microcapsule-type speed-increasing anti-seize lubricant is prepared. The lubricant can flow freely and remain inert in the drilling fluid system, and will not affect the chemical properties of the drilling fluid; the microcapsules do not act on the entire wellbore, and only rupture under pressure to lubricate, so only a small amount of lubricant is needed It can greatly reduce the torque and increase the drilling speed.

Description

technical field [0001] The invention relates to a lubricant for drilling fluid and a preparation method, in particular to a microcapsule type speed-increasing and anti-seize lubricant and a preparation method. Background technique [0002] Drilling fluid lubricant is an important chemical treatment agent for drilling fluid. At present, the conventional drilling fluid lubricants include mineral oil, modified animal and vegetable oil, surfactant, polymer alcohol and other liquid lubricants and graphite, plastic small Balls, glass beads and other solid lubricants. [0003] Conventional liquid or solid lubricants mainly reduce frictional resistance by diluting or interfering with the performance of drilling fluid, so this will change the original performance of drilling fluid, and it is necessary to add other chemical agents to restore the original performance of drilling fluid. On the one hand, it will affect the drilling fluid. On the other hand, it increases the maintenance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/02C09K2208/34
Inventor 陈洋周长清郑海洪
Owner BETTER OILFIELD TECH
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