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

Slurry in use for directional drilling into clay band layer in horizontal

A horizontally oriented, clay layer technology, applied in drilling equipment and other directions, can solve the problems of cuttings removal and transportation, loss of fluidity, cave collapse, etc., to achieve the effects of wellbore stability, strong suspension force, and high drilling speed

Inactive Publication Date: 2005-09-28
大庆油田建设集团
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mud used in the horizontal directional drilling process is composed of bentonite and water. The viscosity and shear force of the single-component mud are too high. During the drilling process, when the drill bit passes through the clay, or through loose, When the mud and shale layers are easy to hydrolyze and disperse or make slurry, the drilled cuttings will quickly disperse into fine particles and suspend in the mud. At this time, the density of the mud increases, and the viscosity shear force rises sharply, making the mud more and more The thicker it is or even completely loses its fluidity, the drilled and crushed cuttings cannot be removed and transported outside the hole in a timely and effective manner, so that hole collapse and drill sticking are prone to occur during drilling, back-expanding and back-dragging

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

[0018] Embodiment 1, each component and content of the mud of this horizontal directional drilling into clay layer are as follows: bentonite 45Kg / m 3 , soda ash 2.0Kg / m 3 , Hydrolyzed polyacrylonitrile 3.1Kg / m 3 , white oil lubricant 3.2Kg / m 3 , and the balance is water. This scheme was tested during the crossing project of the "West-to-East Gas Pipeline" pipeline, and no hole collapse or stuck drill occurred, ensuring smooth drilling.

Embodiment 2

[0019] Embodiment 2, each component and content of the mud of this horizontal directional drilling into clay layer are as follows: bentonite 50Kg / m 3 , soda ash 1.8Kg / m 3 , Hydrolyzed polyacrylonitrile 2.8Kg / m 3 , white oil lubricant 3.0Kg / m 3 , and the balance is water. This scheme was tested during the crossing project of the "West-to-East Gas Pipeline" pipeline, and no hole collapse or stuck drill occurred, ensuring smooth drilling.

Embodiment 3

[0020] Embodiment 3, each component and content of the mud of this horizontal directional drilling into clay layer are as follows: Bentonite 55Kg / m 3 , soda ash 1.6Kg / m 3 , Hydrolyzed polyacrylonitrile 2.6Kg / m 3 , white oil lubricant 2.8Kg / m 3 , and the balance is water. This scheme was tested during the crossing project of the "West-to-East Gas Pipeline" pipeline, and no hole collapse or stuck drill occurred, ensuring smooth drilling.

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
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

A slurry used for clay layer of horizontal positioned drilling is prepared from alta-mud, soda ash, hydrolytic polyacrylonitrile, lubricant and water. the prepared slurry can prevent drilled hole from collapse and driller from seizing-up in course of horizontally positioned drilling.

Description

Technical field: [0001] The invention relates to a mud used for horizontal directional drilling in the field of geological exploration, and belongs to the mud used for horizontal directional drilling in clay layers. Background technique: [0002] The mud used in the horizontal directional drilling process has the functions of carrying and suspending cuttings, stabilizing the well wall, cooling and flushing the drill bit. At present, the mud used in the horizontal directional drilling process is composed of bentonite and water. The viscosity and shear force of the single-component mud are too high. During the drilling process, when the drill bit passes through the clay, or through loose, When the mud and shale layers are easy to hydrolyze and disperse or make slurry, the drilled cuttings will quickly disperse into fine particles and suspend in the mud. At this time, the density of the mud increases, and the viscosity shear force rises sharply, making the mud more and more Th...

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 Patents(China)
Inventor 尹志杰王笑月徐峰耿小光关立志陈守平林春文
Owner 大庆油田建设集团
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