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

Plugging agent, and preparation method and application thereof

A technology of plugging agent and curing agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve the effects of resisting erosion, reducing economic losses, and improving strength and success rate

Active Publication Date: 2019-03-08
PETROCHINA CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a plugging agent and its preparation method and application, which can solve the problems of increasing the strength of the lost leakage layer and improving the success rate of plugging

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
  • Plugging agent, and preparation method and application thereof
  • Plugging agent, and preparation method and application thereof
  • Plugging agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] In a second aspect, the embodiments of the present invention provide a method for preparing the above-mentioned leakage stoppage agent, the preparation method comprising the following steps:

[0060] Step 1: The mica, walnut shells, mineral fibers, and quartz sand are respectively washed with water, pickled, soaked in a coupling agent, and dried to obtain pre-mica, pre-walnut shells, pre-mineral fibers, and Front quartz sand.

[0061] Wherein, the process of washing mica, walnut shells, mineral fibers, and quartz sand in step 1 is: soak mica, walnut shells, mineral fibers, and quartz sand with clear water for 2 to 3 hours to remove the adsorbed Impurities such as clay on mica surface, walnut shell surface, mineral fiber surface and quartz sand surface.

[0062] In step 1, the process of pickling the washed mica, walnut shells, mineral fibers and quartz sand is as follows: soak the above washed mica, walnut shells, mineral fibers with 0.01%-0.05% dilute sulfuric acid so...

Embodiment 1

[0086] This embodiment provides a self-consolidating material whose formulation is as follows:

[0087] 67 parts by weight of thermoplastic phenolic resin, 32.9 parts by weight of hexamethylenetetramine, and 0.1 part by weight of calcium stearate.

Embodiment 2

[0089]This embodiment provides a self-consolidating material whose formulation is as follows:

[0090] 83 parts by weight of thermoplastic phenolic resin, 16.6 parts by weight of hexamethylenetetramine, and 0.4 parts by weight of calcium stearate.

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
Funnel viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a plugging agent, and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The plugging agent comprises, by weight, 20-40 parts of mica for covering self-solidifying materials, 25-45 parts of walnut shells for covering the self-solidifying materials, 5-20 parts of mineral fibers for covering the self-solidifying materials,3-15 parts of quartz sand for covering the self-solidifying materials, 0.3-1.5 parts of viscous polymers and 150-250 parts of water; the total mass of the self-solidifying materials in the plugging agent accounts for 3-15% of the total mass of the mica, the walnut shells, the mineral fibers and the quartz sand. The self-solidifying materials in the plugging agent undergo a polycondensation reaction at a downhole temperature to form three-dimensional resin, so that the solidification force between the components of the plugging agent is improved, scouring of drilling fluids can be effectively resisted, and the strength of a plugging layer and the success rate of plugging are increased; the success rate of plugging of the plugging agent can reach more than 90%, and the economic loss caused by plugging failure is reduced.

Description

technical field [0001] The invention relates to a plugging agent and a preparation method and application thereof, belonging to the technical field of oil field chemistry. Background technique [0002] Lost circulation is a common occurrence during drilling. Lost circulation not only consumes drilling fluid, prolongs drilling time, increases drilling costs, but also leads to other dangerous situations, such as well collapse or blowout. Therefore, after lost circulation occurs, the staff need to plug the lost zone in time. [0003] At present, the commonly used plugging method is to compound the plugging materials such as mica, walnut shell and fiber in the polymer solution to form a plugging agent, and pump the plugging agent to the leakage zone for plugging. [0004] However, the above-mentioned plugging agent only simply physically accumulates materials such as mica, walnut shells and fibers in the downhole, and plugs the lost circulation zone. The circulating drilling ...

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
IPC IPC(8): C09K8/467
CPCC09K8/426C09K8/467C09K2208/04C09K2208/08
Inventor 王在明张艺馨许婧沈园园
Owner PETROCHINA CO LTD
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