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Extreme pressure antifriction type drilling fluid and production method thereof

A drilling fluid and extreme pressure technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of short drilling fluid lubrication time, stuck drill, supporting pressure, etc. The effect of strong blocking ability and high reduction rate

Inactive Publication Date: 2015-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides an extreme-pressure anti-friction drilling fluid to solve the problems of short drilling fluid lubrication time and easy occurrence of back pressure and drill sticking during the drilling of highly deviated wells and horizontal wells

Method used

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  • Extreme pressure antifriction type drilling fluid and production method thereof
  • Extreme pressure antifriction type drilling fluid and production method thereof
  • Extreme pressure antifriction type drilling fluid and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] First mix 1000g of water with 50g of sodium bentonite, stir for 40 minutes at a stirring speed of 3000rpm, then stir for 30 minutes at a stirring speed of 8000rpm, and maintain at room temperature for 24 hours; stir the cured mixture at 4000rpm At high speed, first add 2g coating agent PMHA-II and 10g fluid loss reducer NH for drilling fluid 4 -HPAN, then add 10g of anti-slump agent PA-2 for drilling fluid, 1g of polyamine inhibitor NH-1 for drilling fluid, 5g of extreme pressure friction reducer JM-2 for drilling fluid, stir and mix evenly, and then add caustic soda Adjust the PH value of the above mixture to 8-9; finally add the weighting agent limestone powder for drilling fluid to the above mixture, stir evenly to make the density of the drilling fluid 1.14 g / cm 3 , that is, the extreme pressure anti-friction drilling fluid is obtained, which is recorded as 1# drilling fluid.

Embodiment 2

[0055] First mix 1000g of water with 60g of sodium bentonite, stir at a stirring speed of 4000rpm for 60 minutes, then stir at a stirring speed of 8000rpm for 40 minutes, and place it at room temperature for 30 hours; stir the cured mixture at 4000rpm At high speed, first add 5g of coating agent MMCA and 20g of drilling fluid fluid loss reducer Na-HPAN, then add 20g of drilling fluid anti-slump agent FT-1, 30g of drilling fluid lubricant KD-21C, 15g of drilling fluid Use plugging agent LXJ-1, 2g of polyamine inhibitor NH-1 for drilling fluid, 15g of extreme pressure friction reducer JM-2 for drilling fluid, stir and mix evenly, and then use caustic soda to bring the pH value of the above mixture to 8~ 9; Finally, add the weighting agent limestone powder for drilling fluid to the above mixture, stir evenly to make the density of drilling fluid 1.25 g / cm 3 , that is, the extreme pressure anti-friction drilling fluid is obtained, which is recorded as 2# drilling fluid.

Embodiment 3

[0057]First mix 1000g of water with 60g of sodium bentonite, stir at a stirring speed of 4000rpm for 60 minutes, then stir at a stirring speed of 8000rpm for 40 minutes, and place it at room temperature for curing for 30 hours; stir the cured mixture at 4000rpm At high speed, first add 7g coating agent PMHA-II and 30g drilling fluid fluid loss reducer Na-HPAN, then add 40g drilling fluid anti-slump agent FT-1, 50g drilling fluid lubricant KD-21C, 15g Drilling fluid plugging agent LXJ-1, 5g of drilling fluid polyamine inhibitor NH-1, 20g of drilling fluid extreme pressure friction reducer JM-1, after mixing evenly, use caustic soda to bring the pH value of the above mixture to 8~9; Finally, add limestone powder, a weighting agent for drilling fluid, to the above mixture, and stir evenly to make the density of drilling fluid 1.24 g / cm 3 , that is, the extreme pressure anti-friction drilling fluid is obtained, which is recorded as 3# drilling fluid.

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Abstract

The invention relates to an extreme pressure antifriction type drilling fluid used for oil and gas field mining. The extreme pressure antifriction type drilling fluid is prepared by adopting the following method: mixing 100 parts by weight of water with 4-6 parts by weight of sodium bentonite, stirring at a stirring speed of 1000-4000rpm for 30-60 minutes, then stirring a stirring speed of 6000-10000rpm for 30-40 minutes, and maintaining at normal temperature for at least 24 hours; then adding 0.2-0.8 part by weight of a coating agent for the drilling fluid and 0.5-3 parts by weight of a filtrate reducer for the drilling fluid into the mixture while stirring at a stirring speed of 4000-6000rpm, and then adding 1-5 parts by weight of an anti-collapse agent for the drilling fluid, 0-3 parts by weight of a blocking agent for the drilling fluid, 0.1-1 part by weight of a polyamine inhibitor for the drilling fluid, 0-8 parts by weight of a lubricating agent for the drilling fluid and 0.5-5 parts by weight of an extreme pressure antifriction agent for the drilling fluid; then adjusting pH value of the mixture to be 8-9 by adopting caustic soda; and finally adding a weighting agent for the drilling fluid into the mixture, and uniformly stirring, so that the extreme pressure antifriction type drilling fluid is obtained, wherein the density of the extreme pressure antifriction type drilling fluid is 1.12-1.50g / cm.

Description

technical field [0001] The invention relates to a drilling fluid used in the development of oil and gas fields, in particular to an extreme-pressure anti-friction drilling fluid and a production method thereof. Background technique [0002] During the drilling process of directional wells and horizontal wells, due to friction between the drilling tool and the well wall and casing, and between the drilling fluid and the drilling tool, the well wall and the casing wall, and under the action of gravity, the drilling If the cuttings produced in the drill are not circulated out in time, they will settle and spread to the downhole wall of the borehole, which will further increase the contact area between the metal drilling tool body and the cuttings on the downhole wall, resulting in an increase in torque and friction. Drilling fluid often has serious dragging phenomenon in the construction of highly inclined directional wells and horizontal wells, resulting in low ROP, low constr...

Claims

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Application Information

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IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/02
Inventor 睢文云杨小敏杨雪山曾甘林
Owner CHINA PETROLEUM & CHEM CORP
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