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

Method and formula for plugging cracks, solution holes, hollow spaces, and pores on sub stratum

A technology for underground rock formations and pores, which is applied in cavities and pores to seal underground rock formation cracks and karst caves to achieve reliable sealing and reduce circulation loss.

Inactive Publication Date: 2007-12-26
SUZHOU SHARP ROCK ENERGY DEV TECH
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials do not always form a reliable seal due to the complexity of downhole conditions

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
  • Method and formula for plugging cracks, solution holes, hollow spaces, and pores on sub stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Figure 1 illustrates one possible embodiment of the sealing composition 10 of the present invention that may be sealed around the drill string 14 above a subsurface opening 26 in a wellbore 12, such as a fracture 16, void, cavern or aperture. Where applicable, wellbore seals 28 include drillable packers, segmented seals sealed by packers and / or cement plugs, or utilize other suitable sealing methods.

[0026] As described below, the carrier fluid can be used to transport the filter material 24 to the opening 26, arrow 20 indicates the carrier fluid carrying the filter material 24, after the filter material 24 is brought to the opening 26, this forms the A filter mechanism or a bridge that partially closes the opening 26 but still allows the carrier fluid 30 indicated by arrow 30 to pass through the filter material 24 itself. The solid matter 22 loaded by the carrier fluid simultaneously with the filter substance 24 or after the filter substance will accumulate behind th...

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

This invention discloses a method for blocking cracks, dissolved caverns, cavities and pores in underground rock stratum. The formula comprises: a filtering substance, a solid and a carrying fluid. The filtering substance contains multiple fluid-flowing channels that run through the filtering substance. The solid is used for blocking the fluid-flowing channels. The carrying fluid is used for carrying the filtering substance and / or the solid in the openings of cracks, dissolved caverns, cavities and pores in underground rock stratum. When the carrying fluid carrying the filtering substance into the opening, a bridge is generated to partly block the opening while still supply fluid-flowing channels. The solid and / or solidifiable fluids are introduced into the fluid-flowing channels of the filtering substance, where the solid and / or solidifiable fluid accumulate and form a sealing structure. With the formula, the openings at the wellbore section can be sealed.

Description

technical field [0001] The invention relates to general oil and natural gas drilling, in particular to a method and formula for plugging cracks, caves, cavities and pores in underground rock formations. Background technique [0002] During the drilling process or well completion process, under certain pressure, the fluid in the wellbore can leak into the formation through openings such as fractures, caves, cavities or pores. Formed by artificially induced fractures caused by abnormal wellbore pressure. Drilling fluids are usually very expensive, so it is undesirable to lose such fluids in the "circulation loss zone", and for many reasons well known to those skilled in the art, the circulation of drilling fluids is important, therefore, plugging fractures, caves, Voids and porosity are essential for the drilling process to continue. [0003] Previously, fibrous, flake and granular LCC materials have been applied to well drilling to create the required plugging. For example...

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): C09K8/42
Inventor 王玲
Owner SUZHOU SHARP ROCK ENERGY DEV TECH
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