Drilling fluid bionic lubricant, preparation method and applications thereof

A drilling fluid and lubricant technology, which is applied in the field of oilfield drilling fluids, can solve the problems of small adsorption amount on the surface of the mud cake on the well wall, affecting the lubrication effect, and difficult to firmly adsorb, and achieves easy mass production, easy preparation and environmental protection. Stable quality effect

Active Publication Date: 2020-02-11
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problem of these traditional liquid lubricants is that they are poorly hydrophilic and negatively charged, which will be affected by the competitive adsorption of other hydrophilic materials in the drilling fluid, resulting in a small amount of adsorption on the surface of the drilling tool and the negatively charged well wall mud cake, which seriously Affect the lubrication effect
[0005] However, large-scale recombinant production of glycoproteins remains challenging due to the multiple amino acid repeats in the protein core structure of lubricin and its high degree of glycosylation
In addition, the main component of the well wall mud cake is silicate clay such as montmorillonite, and the surface is negatively charged. Therefore, the overall negatively charged lubricating molecule has a weak affinity on the mud cake surface, and it is difficult to firmly adsorb and exert a good hydration and lubrication effect.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Add 20g polylysine (number average molecular weight 100kDa) to a 250mL three-neck flask with a thermometer and a mechanical stirrer, then add 150g deionized water to dissolve, and adjust the pH of the solution to 8.5 with sodium hydroxide. Then add 100g of methoxypolyethylene glycol-succinimide propionate (number average molecular weight 2kDa), stir and react at room temperature for 24h, then dry and pulverize the product solution at 120°C to obtain a bottle brush polymer PLL -g-PEG.

[0037] Add 100g of deionized water into a stirring flask at room temperature, add 2g of cetyl alcohol and 5g of bottle brush polymer PLL-g-PEG in sequence under stirring, and stir for 10 minutes to make the cetyl alcohol and the bottle Brush polymers are completely soluble in water. Then, 3 g of sodium alginate (100 kDa) was added into the reactor, and the biomimetic lubricant product A1 of the present invention was obtained after stirring for 1 hour.

Embodiment 2

[0039] Add 20g polylysine (number average molecular weight 100kDa) to a 250mL three-neck flask with a thermometer and a mechanical stirrer, then add 150g deionized water to dissolve, and adjust the pH of the solution to 8.5 with sodium hydroxide. Then add 150g of methoxy polyethylene glycol-succinimide propionate (number-average molecular weight 2kDa), stir and react at room temperature for 24h, then dry and pulverize the product solution at 120°C to obtain a bottle-brush polymer PLL -g-PEG.

[0040] Add 100g of deionized water into a stirring flask at room temperature, add 2g of cetyl alcohol and 5g of bottle brush polymer PLL-g-PEG in sequence under stirring, and stir for 10 minutes to make the cetyl alcohol and the bottle Brush polymers are completely soluble in water. Then, 3 g of sodium alginate (100 kDa) was added into the reactor, and the biomimetic lubricant product A2 of the present invention was obtained after stirring for 1 hour.

Embodiment 3

[0042] Add 20g polylysine (number average molecular weight 100kDa) to a 250mL three-neck flask with a thermometer and a mechanical stirrer, then add 150g deionized water to dissolve, and adjust the pH of the solution to 8.5 with sodium hydroxide. Then add 200g of methoxypolyethylene glycol-succinimide propionate (number average molecular weight 2kDa), stir and react at room temperature for 24h, then dry and pulverize the product solution at 120°C to obtain a bottle brush polymer PLL -g-PEG.

[0043] Add 100g of deionized water into a stirring flask at room temperature, add 3g of cetyl alcohol and 5g of bottle brush polymer successively under stirring, and stir for 10 minutes to make cetyl alcohol and bottle brush polymer completely Dissolve in water. Then, 3 g of sodium alginate (100 kDa) was added into the reactor, and the biomimetic lubricant product A3 of the present invention was obtained after stirring for 1 hour.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
number average molecular weightaaaaaaaaaa
number average molecular weightaaaaaaaaaa
number average molecular weightaaaaaaaaaa
Login to view more

Abstract

The invention relates to a drilling fluid bionic lubricant, a preparation method and applications thereof, and belongs to the technical field of oil field drilling fluids, wherein the drilling fluid bionic lubricant comprises, by weight, 100 parts of water, 2-15 parts of a bottle brush type polymer, 1-5 parts of sodium alginate and 1-10 parts of long-chain fatty alcohol. In the prior art, the drilling fluid liquid lubricant generally has problems of poor hydrophilicity and negative electricity, and can be affected by the competitive adsorption of other hydrophilic materials in the drilling fluid, so that the surface adsorption capacity on the drilling tool and the negatively-charged well wall mud cake is low so as to seriously affect the lubricating effect. According to the invention, thedrilling fluid bionic lubricant can be well adsorbed on the surfaces of the drilling tool and the well wall mud cake, enables a friction surface to be highly hydrated, has good and durable lubricatingeffect compared with the lubricant in the prior art, and has good application prospect.

Description

technical field [0001] The invention relates to the field of oilfield drilling fluid technology, and more specifically, relates to a drilling fluid bionic lubricant and a preparation method and application thereof. Background technique [0002] With the depletion of oil and gas resources, deep horizontal well drilling has gradually become an important technical means to develop deep oil and gas reservoirs. Due to the deep burial of oil and gas reservoirs and deep build-up points, there are high friction and torque during the drilling process of the build-up section and horizontal section of deep horizontal wells, which not only seriously affects the drilling speed and wellbore trajectory control, but also threatens the drilling process. The safety of operation is the core problem restricting the extension length of the horizontal section of deep horizontal wells, which puts forward higher requirements on the lubricating performance of drilling fluid. [0003] Lubricant is a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 宣扬钱晓琳林永学徐江杨小华金军斌王琳
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap