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

Crack plugging agent based on nano-micron fibers for drilling fluid and preparation method

A technology of microfibers and nanofibers, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as wellbore instability, improve temperature resistance, improve stability and wellbore stability, and facilitate The effect of promotion

Active Publication Date: 2019-06-11
CHINA PETROCHEMICAL CORP +3
View PDF18 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the existing technology in solving the problem of wellbore instability in the mud shale drilling process, and propose a method for effectively plugging nanopores and micro-nano cracks through the compounding of nano-micron particles. Nano-micron fiber-based fracture plugging agent for drilling fluid and preparation method thereof

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
  • Crack plugging agent based on nano-micron fibers for drilling fluid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example

[0031] A nano-micron fiber-based crack plugging agent for drilling fluids, comprising the following components in parts by mass: 32-37 nanofibers, 6-7 dispersants, and 57-61 micron fibers. Among them: the nanofibers and microfibers are derived from bagasse; bagasse is the residue after sugar cane is squeezed. Sugar cane is mainly produced in subtropical regions such as Guangxi and Guangdong, and its main components are vitamins, fats, protein organic acids, and calcium. , iron and other substances. The dispersant is one of sodium dioctyl sulfosuccinate, sodium trioctyl sulfosuccinate, sodium dioctyl sulfosuccinate or any combination of two.

[0032] The specific preparation method of the aforementioned drilling fluid based on nano-microfiber fracture plugging agent comprises the following steps:

[0033] 1. Pretreatment of bagasse:

[0034] (1) Clean the bagasse with deionized water, dry it, and press it with a press for several times in a row. After squeezing out all the suga...

Embodiment 1

[0043] (1) Add 1000 mL of deionized water to a high-pressure homogenizer, add 130 g of nanofibers in batches, homogenize at 18,000 rpm for 1 hour, add 20 g of dispersants (such as sodium dioctyl sulfosuccinate, trioctyl Sodium sulfosuccinate, sodium dioctyl sulfosuccinate or a combination of any two), homogenize at 480rpm for 18min; (2) Slowly add 200g of micron fibers into the above homogenizer , homogenized for 48 minutes at 480rpm; (3) Dry the above product at 80±5°C, and use a pulverizer to crush the dried product to 800~1000 mesh, that is, to obtain nano-micron fiber cracks plugging agent.

Embodiment 2

[0045] (1) Add 1000mL of deionized water to the high-pressure homogenizer, add 150g of nanofibers in batches, homogenize at 22000rpm for 1.5h, add 30g of dispersant (such as sodium dioctyl sulfosuccinate, trioctyl Sodium sulfosuccinate, sodium dioctyl sulfosuccinate, or any combination of two), homogenize at 500rpm for 20min; (2) Slowly add 300g micron Fiber, homogenized for 50min at 500rpm; (3) Dry the above product at 80±5°C, and use a pulverizer to crush the dried product to 800~1000 mesh to obtain nano-micron fiber Crack plugging agent.

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a crack plugging agent based on nano-micron fibers for drilling fluid and a preparation method. The crack plugging agent comprises the following components in parts by mass: 32-37 parts of nano fibers, 6-7 parts of a dispersing agent and 57-61 parts of micron fibers. The preparation method mainly comprises the steps of bagasse pretreatment, micron fiber preparation, nano fiber preparation and preparation of the crack plugging agent based on nano-micron fibers. According to the invention, sugarcane residues are dried, crushed, purified, strongly acidified and dialyzed, and are combined with micron fibers on the basis to form a composite fiber plugging type, so that nano pores and micro cracks in shale can be effectively plugged. The plugging agent has little influence on the performance of the drilling fluid, is non-toxic, has no adverse effect on the environment, has the acute toxicity EC50 of more than 60000, and is an efficient shale micro-crack plugging agent.

Description

technical field [0001] The invention relates to a crack plugging agent for drilling fluid in the field of drilling chemical materials. Specifically, if a high-permeability formation or a micro-fracture formation is encountered during drilling, the fluid loss of the drilling fluid will increase significantly. At this time, it is necessary to add fracture plugging agent to quickly form a plugging layer, reduce filtrate invasion, maintain wellbore stability and reduce fluid loss, and avoid corresponding complicated accidents. Background technique [0002] With the continuous expansion of oil and gas resources exploration, especially the large-scale development of shale oil and gas resources, the problem of wellbore stability in shale intervals has become more and more serious. In this formation, mainly hard and brittle shale is contained. Generally speaking, , the strength of this kind of mud shale is not high, the shale is highly dispersed, and the content of montmorillonite i...

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): C09K8/035C09K8/42
Inventor 蓝强徐运波张妍郑成胜张鹏吴雄军陈健刘振东于雷张虹
Owner CHINA PETROCHEMICAL 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