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

Non-excavation horizontal directional drilling crossing construction method for high-pressure gas pipeline

A technology of horizontal directional drilling and horizontal directional drilling rigs, which is applied in directional drilling, drilling equipment and methods, drilling compositions, etc., can solve problems such as landslides, achieve low salt intrusion resistance, wide applicable site restrictions, reduce The effect of construction risk

Inactive Publication Date: 2018-09-28
邳州中燃城市燃气发展有限公司
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most actual non-excavation processes, a site is not composed of a single soil layer, but multiple strata exist at the same time, interacting and influencing each other. Efficiency, etc. have a great impact. If the mud provided is not suitable, there will be dangers such as landslides

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for crossing the high-pressure gas pipeline without excavation by horizontal directional drilling in this embodiment includes the following steps:

[0026] 1) Place the horizontal directional drilling machine next to the working pit and fix it with bolts;

[0027] 2) Conduct pilot hole construction according to the designed pipeline trajectory curve, and set data control points every 3m on the crossing curve;

[0028] 3) After the pilot hole is drilled, use the reaming bit to ream the hole, and at the same time add drilling fluid to the pilot hole through the reaming bit, and expand the pilot hole to meet the size of the pipeline in stages; the reaming bit is oriented horizontally The drill pipe of the drilling rig is driven; the drilling fluid is composed of the following components in weight percentage: 3% sodium bentonite, 0.20% viscosifier, 3% ethylene glycol-propylene glycol copolymer, 0.27% sodium carboxymethyl cellulose, sulfonated 0.32% phenolic resi...

Embodiment 2

[0032] The method for crossing the high-pressure gas pipeline without excavation by horizontal directional drilling in this embodiment includes the following steps:

[0033] 1) Place the horizontal directional drilling machine next to the working pit and fix it with bolts;

[0034] 2) Conduct pilot hole construction according to the designed pipeline trajectory curve, and set data control points every 3m on the crossing curve;

[0035] 3) After the pilot hole is drilled, use the reaming bit to ream the hole, and at the same time add drilling fluid to the pilot hole through the reaming bit, and expand the pilot hole to meet the size of the pipeline in stages; the reaming bit is oriented horizontally The drill pipe drive of the drilling rig; the drilling fluid is composed of the following components in weight percentage: 3.5% sodium bentonite, 0.21% tackifier, 1% glycidyltrimethylammonium chloride, 0.31% hydrolyzed polyacrylonitrile, sulfonate 0.3% phenolic resin, 0.28% polyoxy...

Embodiment 3

[0039] The method for crossing the high-pressure gas pipeline without excavation by horizontal directional drilling in this embodiment includes the following steps:

[0040] 1) Place the horizontal directional drilling machine next to the working pit and fix it with bolts;

[0041] 2) Conduct pilot hole construction according to the designed pipeline trajectory curve, and set data control points every 5m on the crossing curve;

[0042] 3) After the pilot hole is drilled, use the reaming bit to ream the hole, and at the same time add drilling fluid to the pilot hole through the reaming bit, and expand the pilot hole to meet the size of the pipeline in stages; the reaming bit is oriented horizontally The drill pipe of the drilling rig is driven; the drilling fluid is composed of the following components in weight percentage: 4% sodium bentonite, 0.18% viscosifier, 0.24% potassium humate, 0.29% sodium carboxymethyl cellulose, and 0.27% sulfonated phenolic resin %, 0.3% of polyox...

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

No PUM Login to View More

Abstract

The invention relates to a non-excavation horizontal directional drilling crossing construction method for a high-pressure gas pipeline, and belongs to the technical field of pipeline laying. The non-excavation horizontal directional drilling crossing construction method comprises the following steps that a horizontal directional drilling rig is placed beside a work pit and fixed through anchor rods; a guiding hole is constructed according to the designed pipeline trajectory curve; after the guiding hole is drilled, broaching is conducted through a broaching drill bit, and meanwhile drilling fluid is added into the guiding hole through the broaching drill bit; a drilling rod for last broaching and the high-pressure gas pipeline are connected through a pipe pulling head, and the drilling rod is pulled back to pull the high-pressure gas pipeline into the guiding hole; and cement slurry is injected into a gap between the high-pressure gas pipeline and the guiding hole. According to the non-excavation horizontal directional drilling crossing construction method, the hole wall of the drilled hole can be supported by the drilling fluid in time, the stability of the hole wall is guaranteed, the construction risk caused by hole collapse is reduced, the dosage of bentonite is less, the construction cost can be reduced, and the environment is protected.

Description

technical field [0001] The invention relates to a non-excavation horizontal directional drilling crossing construction method of a high-pressure gas pipeline, which belongs to the technical field of pipeline laying. Background technique [0002] Gas pipeline is an important infrastructure and occupies an important position in urban public utilities. However, it should be noted that there are often contradictions between urban gas pipeline engineering and urban road excavation. Road excavation not only requires complex procedures, but also requires construction Difficult and costly, this requires the use of non-excavation directional crossing construction technology. Compared with infrastructure such as water network and heating network, the development of gas network lags behind, and the diameter of gas pipelines is generally less than 1m, which is suitable for non-excavation directional crossing construction technology. According to different construction methods, the non-...

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): E21B7/04E21B7/30E21B21/00E21B33/13F16L1/028C09K8/24
CPCC09K8/24C09K2208/12E21B7/046E21B7/30E21B21/00E21B33/13F16L1/028
Inventor 姬中强郭依勇张鹏莱吕鹏
Owner 邳州中燃城市燃气发展有限公司
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