Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Drilling fluid, and local crushing formation inclined well inverse well guide hole drilling process

A water-based drilling fluid and pilot hole technology, applied in directional drilling, wellbore/well components, drilling composition, etc., can solve the problems of insufficient inhibition performance, difficulty in solving wellbore, unstable wellbore, etc. Conducive to stability and storage protection, improving the ability to stabilize the well wall, preventing the effect of well wall collapse

Active Publication Date: 2017-12-15
STATE GRID CORP OF CHINA +3
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the existing water-based drilling fluid is difficult to solve the problem of wellbore instability and wellbore leakage, and there is a problem of insufficient suppression performance, so as to provide a multi-functional water-based drilling fluid. Fluid and Raise Well Pilot Hole Drilling Technology Using It in Partial Fractured Stratum

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
  • Drilling fluid, and local crushing formation inclined well inverse well guide hole drilling process
  • Drilling fluid, and local crushing formation inclined well inverse well guide hole drilling process
  • Drilling fluid, and local crushing formation inclined well inverse well guide hole drilling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A water-based drilling fluid consisting of:

[0042] Sodium bentonite 1.5g, polyacrylamide 0.3g, aluminum chloride 4g, iron chromium lignosulfonate 1g, sulfonated pitch 2g, water 100g.

[0043] In 100g of clear water, add each component in the formula amount, stir well, make it mix completely and uniformly, obtain the described water-based drilling fluid.

Embodiment 2

[0045] A water-based drilling fluid consisting of:

[0046] Sodium bentonite 3g, polyacrylamide 0.1g, aluminum chloride 6g, iron chromium lignosulfonate 3g, sulfonated pitch 4g, water 100g.

[0047] In 50g of clear water, add the remaining components in the formula amount, stir for 2 minutes, then add 50g of water, stir well, make it completely and evenly mixed, and obtain the water-based drilling fluid.

Embodiment 3

[0049] A water-based drilling fluid consisting of:

[0050] Sodium bentonite 3g, JEFFAMINE D-230 polyoxypropylene diamine 0.1g, sodium chloride 8g, MGAC-2 1g, sulfonated pitch 1g, water 100g.

[0051] In 100g of clear water, add each component in the formula amount, stir well, make it mix completely and uniformly, obtain the described water-based drilling fluid.

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
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of inclined well construction, and discloses drilling fluid, and a local crushing formation inclined well inverse well guide hole drilling process adopting same. The drilling fluid comprises bentonite, a coating agent, inorganic salt, a viscosity / filtration loss reducer, a wall protective agent and water, and the components are in synergistic cooperation, so dispersion of clay and rock debris is effectively inhibited, the well wall stabilizing ability is improved and the downhole safety of well drilling is effectively guaranteed. According to the local crushing formation inclined well inverse well guide hole drilling process, the aims of carrying the rock debris and returning slag, balancing the pressure of the bottom layer, stabilizing the well wall and the like are fulfilled by injecting the drilling fluid provided by the invention; and the inverse well guide hole drilling process can perform construction in the fractured formation, so the construction efficiency is increased by above 25 percent and the application range of the reverse well method is widened.

Description

technical field [0001] The invention belongs to the technical field of inclined well construction, and in particular relates to a drilling fluid and a process for drilling pilot holes in inclined wells in partially broken formations using the drilling fluid. Background technique [0002] There are a large number of inclined well shafts in the water diversion system of the pumped storage power station. These inclined wells are mostly arranged at about 50°, and have the characteristics of long length and large diameter. The safe construction of the inclined well section is the key to the construction of the entire water delivery system. At present, such inclined wells usually adopt the construction method of "pilot well excavation, and then expand the excavation". There are two types of pilot well excavation, one is the pilot well drilled by a raise drilling rig, and the other is the tank climbing method. Among them, the crawling irrigation method requires a large number of p...

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): C09K8/24E21B7/06E21B21/00
CPCC09K8/24C09K2208/12E21B7/06E21B21/00
Inventor 费万堂马雨峰龙小刚刘双华董云涛王润程守业姜浩亮
Owner STATE GRID CORP OF CHINA
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
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