Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Starch-based drilling fluid and preparation method thereof

A drilling fluid and starch-based technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of weakening the environmental protection effect of an environmentally friendly starch-based single agent, to inhibit hydration and dispersion, stabilize the well wall, reduce the dehydration effect

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of environmental friendliness, if the environmental protection performance of each treatment agent is better than starch microspheres, then the complex treatment agent components will also weaken the environmental protection effect of the environmentally friendly starch-based single agent

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Starch-based drilling fluid and preparation method thereof
  • Starch-based drilling fluid and preparation method thereof
  • Starch-based drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] In the embodiment of the present invention and comparative example, the preparation method of described nanoscale starch microspheres comprises the following content:

[0046] (1) Weigh a certain amount of starch, α-amylase and mix with water for curing treatment;

[0047] (2) Add an organic solvent to the feed liquid obtained in step (1), and carry out solid-liquid separation after standing;

[0048] (3) The solid phase material obtained after separation is further subjected to centrifugation, washing and drying;

[0049] (4) Mix the material obtained in step (3) with the sodium trimetaphosphate solution, mix evenly, and then carry out standing treatment, and then perform centrifugation, washing and drying after further curing treatment;

[0050] (5) Mix the material obtained in step (4) with water and heat to boiling state, and cool down to 30-80°C after a period of treatment;

[0051] (6) Add stabilizer and zwitterionic surfactant to the material obtained in step (...

Embodiment 1

[0064] Weigh 7 parts of corn starch and 0.035 parts of α-amylase into 100 parts of deionized water, and maintain at 50°C for 25 minutes. Add 200 parts of ethanol dropwise to the feed liquid, let the feed liquid settle after the addition of ethanol is complete, discard the supernatant, centrifuge, stir and wash the bottom insoluble matter, and dry at 35°C for 2.5 hours to obtain nano starch crystals. Weigh 5.5 parts of sodium trimetaphosphate to prepare 58 parts of solution, add nano-starch crystals into the solution and mix well, then soak for 2.5 hours, then keep the solution at 30°C for 2 hours, centrifuge, stir and wash, and dry at 30°C for 6 hours to obtain Esterified nano starch crystals. Add the esterified nano-starch crystals to 100 parts of deionized water, boil the feed solution for 25 minutes to lower the feed liquid to 65°C, add 35 parts of glycerol and 3 parts of dimethyl dodecyl sulfopropyl ammonium salt to the feed liquid , mix well. Weigh 20 parts of sodium ch...

Embodiment 2

[0067] Weigh 15 parts of mung bean starch and 0.125 parts of α-amylase into 100 parts of deionized water, and maintain at 60°C for 40 minutes. Add 400 parts of acetone dropwise to the feed liquid, and let the feed liquid settle after the addition of acetone is complete, discard the supernatant, centrifuge, stir and wash the bottom insoluble matter, and dry at 45°C for 8 hours to obtain nano-starch crystals. Weigh 10 parts of sodium trimetaphosphate to prepare 75 parts of solution, add nano-starch crystals to the solution and mix well and soak for 3 hours, then heat the solution to 60°C, maintain for 2.5 hours, centrifuge, stir and wash, and dry at 50°C for 8 hours to obtain Esterified nano starch crystals. Add the esterified nano-starch crystals to 100 parts of deionized water, boil the feed solution for 30 minutes to lower the feed liquid to 45°C, add 50 parts of polyethylene glycol 2000, 4.5 parts of dimethyl hexadecyl sulfoethyl to the feed liquid Ammonium salt, mix well. ...

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
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a starch-based drilling fluid and a preparation method thereof. The drilling fluid comprises the following components in parts by weight: 100 parts of water; the drilling fluid is prepared from the following components in parts by weight: 1-6 parts of bentonite, 0.5-5 parts of a filtrate reducer, 0.5-5 parts of nanoscale starch microspheres, 0.2-4 parts of a polymer coating agent, 0.5-4 parts of a wall fixing agent and 0.05-0.5 part of a viscosity reducer. The preparation method of the drilling fluid comprises the step of uniformly mixing the water, the bentonite, the filtrate reducer, the nanoscale starch microspheres, the polymer coating agent, the wall fixing agent and the viscosity reducer to obtain the drilling fluid. The drilling fluid has the advantages of being simple in composition, efficient in performance and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemicals, and in particular relates to a drilling fluid and its preparation and application. Background technique [0002] Starch microspheres have excellent environmental performance, and the raw materials are cheap and easy to obtain. At present, there have been many published articles and patents on their application performance in many fields such as medical treatment, packaging, and papermaking. Patent CN 109912724A discloses a micron-scale porous starch microsphere. The reverse emulsion polymerization method makes starch microspheres have a stable porous structure through secondary crosslinking, and the adsorption rate of the microspheres to methyl violet can reach 43.3%; patent CN 104785179 A discloses a method for preparing nano starch microspheres , the method prepares nano-starch microspheres with controllable particle size and high purity in an energy-saving and environment-friendly w...

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): C09K8/24C09K8/20
CPCC09K8/206C09K8/24
Inventor 王晨赵林杨超曾虹钢孙中伟周成华赵凯强刘全杰
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com