Drag inhibitor/reducer for drilling fluid and preparation method of drag inhibitor/reducer

A technology of drilling fluid and drag reducing agent, applied in chemical instruments and methods, drilling composition, etc., can solve problems such as pore blockage

Inactive Publication Date: 2014-12-10
克拉玛依市金鑫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both can reduce the frictional resistance during the drilling process and increase the ROP. However, for the protection drilling fluid for no-solid or low-solid reservoirs, acrylamide or amide macromolecular polymers are likely to cause pore blockage, while The temperature resistance of ordinary vegetable oil lubricants needs to be further improved. Therefore, it is necessary to develop a drag reducer with good compatibility

Method used

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  • Drag inhibitor/reducer for drilling fluid and preparation method of drag inhibitor/reducer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] At a temperature of 50°C to 60°C, take 2.5g of α-glucose methyl glycoside and 2.5g of β-glucose methyl glycoside and mix them into 95g of water to fully dissolve to form a polyglucoside aqueous solution; add 0.5g of sulfurized oil to 78g of white oil, After stirring at a speed of 800r / min to 1000r / min for 1.5h, add 0.5g of cationic gemini surfactant and 1.0g of quaternary ammonium salt cationic surfactant in turn, and stir at a speed of 800r / min to 1000r / min for 3h , add 20g of polyglucoside aqueous solution, stir for 4 hours at a rotating speed of 500r / min to 1000r / min, then concentrate at a controlled temperature of 100°C to 120°C for 1h to obtain a drag reducing agent for drilling fluid.

Embodiment 2

[0029] At a temperature of 50°C to 60°C, take 2.5g of α-glucose methyl glycoside and 2.5g of β-glucose methyl glycoside and mix them into 95g of water to fully dissolve to form a polyglucoside aqueous solution; add 1.0g of sulfurized oil to 67.5g of white oil, After stirring at a speed of 800r / min to 1000r / min for 1.5h, add 0.5g of cationic gemini surfactant and 1.0g of quaternary ammonium salt cationic surfactant in turn, and stir at a speed of 800r / min to 1000r / min 3h, add 20g of polyglucoside aqueous solution, stir at a speed of 500r / min to 1000r / min for 4h, then concentrate at a controlled temperature of 100°C to 120°C for 1h to obtain a drag reducing agent for drilling fluid.

Embodiment 3

[0031] At a temperature of 50°C to 60°C, take 2.5g of α-glucose methyl glycoside and 2.5g of β-glucose methyl glucoside and mix them into 95g of water, fully dissolve to form polyglucoside aqueous solution; add 1.0g of sulfurized oil to 77g of white oil, After stirring at a speed of 800r / min to 1000r / min for 1.5h, add 1.0g of cationic gemini surfactant and 1.0g of quaternary ammonium salt cationic surfactant in sequence, and stir at a speed of 800r / min to 1000r / min for 3h , add 20g of polyglucoside aqueous solution, stir for 4 hours at a rotating speed of 500r / min to 1000r / min, then concentrate at a controlled temperature of 100°C to 120°C for 1h to obtain a drag reducing agent for drilling fluid.

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Abstract

The invention relates to a drag inhibitor/reducer for a drilling fluid and a preparation method of the drag inhibitor/reducer. The drag inhibitor/reducer is prepared from the following components in percentage by weight: 0.5-2% of cationic gemini surfactant, 1-2% of quaternary ammonium cationic surfactant, 0.5-1% of vulcanized oil, 20-25% of glucoside water solution and the balance of white oil. The preparation method comprises the steps of adding the vulcanized oil into the white oil at the temperature of 50-60 DEG C, and stirring for 1-2h; then, sequentially adding the cationic gemini surfactant and the quaternary ammonium cationic surfactant, and stirring for 2-4h; next, adding the glucoside water solution, and stirring for 2-4h; and finally, controlling the temperature at 100-120 DEG C, and concentrating for 1h to obtain the drag inhibitor/reducer for the drilling fluid. The drag inhibitor/reducer is suitable for reducing frictional resistance in the drilling processes of horizontal wells and large-displacement wells, and has a better effect in solid-free, low-solid and clay-free drilling fluid systems.

Description

technical field [0001] The invention relates to the technical field of drilling fluid in petrochemical industry, and relates to an inhibitory drag reducer for drilling fluid and a preparation method thereof. Background technique [0002] In the construction of extended-reach wells and horizontal wells, as the inclination angle increases, the contact product between the drilling tool and the well wall, as well as the frictional resistance and torque resistance increase. There are as many as 10 factors affecting resistance, but its size mainly depends on the contact area between the drilling tool and the well wall. There are three lubrication modes in the drilling process: obstacle lubrication mode, boundary lubrication mode, and hydraulic lubrication mode. From the perspective of reducing friction, it is necessary to avoid obstacles to lubrication and maintain hydraulic lubrication. To this end, we should start from two aspects of drilling technology and drilling fluid tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/28
Inventor 王茂仁冯建建王晨魏宏王军肖达士肖露张梁
Owner 克拉玛依市金鑫科技有限公司
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