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Amide compound and drilling fluid drag reducer as well as preparation method of drilling fluid drag reducer

A technology of amide compound and drilling fluid, which is applied in the field of drilling fluid drag reducer, can solve the problems of reducing mechanical penetration rate, increasing flow resistance, sticking, mud balling, etc., to reduce the probability of drill bit mud balling and reduce hydraulic friction Resistivity, the effect of reducing stuck sticking

Inactive Publication Date: 2014-02-26
CNPC DRILLING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drilling of highly deviated well sections, the contact area between the drill string and the borehole wall increases, the frictional resistance increases, the wellbore cleaning is not effective, and the wellbore wall is unstable, which may lead to diameter shrinkage, collapse and the formation of cuttings beds, increasing the Torque and friction during drilling and tripping
If the lubricity is not well controlled, it is easy to cause complex accidents such as sticking and mud bagging, which will increase the flow resistance, limit the water horsepower, and reduce the ROP

Method used

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  • Amide compound and drilling fluid drag reducer as well as preparation method of drilling fluid drag reducer
  • Amide compound and drilling fluid drag reducer as well as preparation method of drilling fluid drag reducer
  • Amide compound and drilling fluid drag reducer as well as preparation method of drilling fluid drag reducer

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preparation example Construction

[0026] The preparation method of drilling fluid drag reducer provided by the invention comprises the following steps:

[0027] (1) Under neutralization reaction conditions, contact fatty acids with 16-18 carbon atoms with metal hydroxides to obtain fatty acid salts;

[0028] (2) Under sulfonation reaction conditions, contacting the fatty acid salt with concentrated sulfuric acid to obtain sulfonated fatty acid salt;

[0029] (3) Under amidation reaction conditions, contacting the sulfonated fatty acid salt with concentrated sulfuric acid and a diamine with 1-12 carbon atoms.

[0030] According to the present invention, at normal temperature (25°C), fatty acids with 16-18 carbon atoms are usually solid. Therefore, in order to allow the fatty acids to fully contact and react with metal hydroxides, it is preferable to use carbon atoms with 16 Before the -18 fatty acid is contacted with the metal hydroxide, the fatty acid is melted, and the molten fatty acid is contacted with the...

Embodiment 1

[0054] This embodiment is used to illustrate the amide compound and drilling fluid drag reducer provided by the present invention and the preparation method thereof.

[0055] Add 15 parts by weight of animal oil (purchased from Zhucheng Jixiang Waste Oil Treatment Center, brand name ZY-200, the same below) into the reaction vessel, raise the temperature to 50°C and stir for 30 minutes to melt the animal oil. Then, 10 parts by weight of a sodium hydroxide solution with a concentration of 30% by weight was added into the reaction vessel, and the temperature was raised to 100° C. for 120 minutes at a stirring rate of 1000 rpm. Then the reaction product was cooled to 25°C, and 15 parts by weight of concentrated sulfuric acid with a concentration of 98% by weight was added dropwise (the drop rate was 1 part by weight / min) to the above reaction product, and then the temperature was controlled at 35°C. The sulfonation reaction was carried out for 6 hours, and then the obtained sulfon...

Embodiment 2

[0058] This embodiment is used to illustrate the amide compound and drilling fluid drag reducer provided by the present invention and the preparation method thereof.

[0059] Add 20 parts by weight of animal oil into the reaction vessel, raise the temperature to 50° C. and stir for 30 minutes to melt the animal oil. Then 20 parts by weight of sodium hydroxide solution with a concentration of 40% by weight was added into the above reaction vessel, and the temperature was raised to 105° C. for 60 minutes at a stirring rate of 2000 rpm. Then the reaction product was cooled to 28°C, and 30 parts by weight of concentrated sulfuric acid with a concentration of 98% by weight was added dropwise (the drop rate was 1 part by weight / min) to the above reaction product, and then the temperature was controlled at 40°C. The sulfonation reaction was carried out for 2 hours, and then the obtained sulfonation reaction product was left to stand and the water in the lower layer was separated to o...

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Abstract

The invention provides an amide compound, a preparation method of a drilling fluid drag reducer and the drilling fluid drag reducer prepared by the method. The amide compound has a structure shown in the formula (1), wherein R1 is substituted or un-substituted C1-C12 alkylene; substituent group is at least one of C1-C6 alkyl, a sulfonate group and a sulfonic group; and m and n are independently integers of 13-15. The drilling fluid drag reducer provided by the invention can be used for remarkably lowering a friction coefficient, so that the probability of adhering and jamming a drill and a bit mud drum is effectively reduced. The structure is shown in the description.

Description

technical field [0001] The invention relates to an amide compound, a preparation method of a drilling fluid drag reducer, and a drilling fluid drag reducer prepared by the method. Background technique [0002] Lubricity is an important problem in the regulation of drilling fluid performance in deep wells, horizontal wells, and extended-reach wells, and is a technical bottleneck restricting the construction of high-density drilling fluids. In the process of deep well drilling, ordinary lubricants lose their activity due to factors such as cross-linking, degradation, volatilization, and demulsification under the conditions of high temperature, high density, high solid phase, and strong alkali, and the lubrication performance is greatly reduced. Due to its high solid phase and thick filter cake, it requires higher lubricating performance. During the drilling of highly deviated well sections, the contact area between the drill string and the borehole wall increases, the frictio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/17C07C303/32C09K8/035
Inventor 孙金生杨宇平张振华
Owner CNPC DRILLING RES INST