Butting and going forward slurry in use for operation of pushing pipe

A jacking and mud technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as jacking failure, high frictional resistance, and surface subsidence, so as to reduce filtration loss, reduce frictional resistance, and improve The effect of coalescence stability

Active Publication Date: 2008-05-14
DAQING PETROLEUM ADMINISTRATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention provides a jacking mud for pipe jacking operations, which solves the problems of easy ground subsidence, excessive frictional resistance and jacking failure during the jacking process of an earth pressure balance shield pipe jacking machine

Method used

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  • Butting and going forward slurry in use for operation of pushing pipe
  • Butting and going forward slurry in use for operation of pushing pipe
  • Butting and going forward slurry in use for operation of pushing pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, prepare three kinds of muds of the present invention below, carry out laboratory contrastive experiment with the positive gel mud of potassium ammonium polymer mud and high bentonite:

[0012] Mud 1, first grade bentonite 6%, hydrolyzed polyacrylonitrile ammonium salt NH 4 - Mixing 0.6% of HPAN, 0.7% of carboxymethyl starch CMS, 35% of blast furnace slag, 0.8% of potassium sulfonated tannate and the rest of water.

[0013] Mud 2, secondary bentonite 14%, hydrolyzed polyacrylonitrile ammonium salt NH 4 - HPAN 1.1%, carboxymethyl starch CMS 0.9%, blast furnace slag 50%, lubricant RH-31.5%, potassium sulfonated tannate 0.5%, and the balance water.

[0014] Mud 3, second grade bentonite 10%, hydrolyzed polyacrylonitrile ammonium salt NH 4 - HPAN 0.8%, carboxymethyl starch CMS 0.5%, blast furnace slag 60%, lubricant RH-32.5%, potassium sulfonated tannate, 0.3% and the balance water.

[0015] 1. Inhibition evaluation experiment:

[0016] 1.1 Rolling dispersi...

Embodiment 2

[0055] Embodiment 2, applied to Harbin Mopanshan Reservoir water supply project water distribution pipe network (first bid section) water delivery pipeline crossing was successful.

[0056] The bentonite used in the above examples is grade one, grade two or grade one anqiu clay; the composition of the lubricant RH-3 is a compound of various surfactants, which is sold by the No. 1 Aerospace Chemical Factory of Huixian City, Henan Province , brown liquid, density 0.85~0.90g / cm 3 , Lubrication coefficient reduction rate > 70.0%, pH 7 ~ 8, performance and use: used in various water-based drilling fluids, as anti-seize lubricants; hydrolyzed polyacrylonitrile ammonium salt NH 4 -HPAN model is NH4-HPAN, which is made of polyacrylonitrile hydrolyzed under high temperature and high pressure, and its appearance is yellow powder. 2. Good thermal stability, 3. Good rheological properties of mud, 4. Has certain ability to inhibit clay hydration and anti-slump, 5. Has good anti-sticking e...

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Abstract

This invention discloses jacking slurry used in pipe-jacking construction. The jacking slurry comprises: bentonite 6-14 wt.%, hydrolyzed NH4-HPAN 0.6-1.1 wt.%, carboxymethyl starch 0.5-0.9 wt.%, lubricant RH-3 0-2.5 wt.%, furnace slag 35-60 wt.%, NaOH 2.5-6 wt.%, sulfonated tannate of potassium 0.3-0.8 wt.% and water. The jacking slurry can solve the problem of surface subsidence in the jacking process of earth pressure balance shield pipe-jacking machine, and reduce frictional resistance.

Description

Technical field: [0001] The invention relates to an additive used in the field of geological rock exploration, in particular to a jacking mud for pipe jacking operations. Background technique: [0002] At present, the mud used for jacking, lubricating and filling of pipe jacking machines in China has a single performance and is easy to pollute groundwater, and the mud will cause surface subsidence after dehydration. When a loose ground is encountered during the jacking process, water gushing will occur or construction will not be possible due to excessive frictional resistance, resulting in failure of pipe jacking. Invention content: [0003] In order to solve the deficiencies in the background technology. The invention provides a jacking mud for pipe jacking operations, which solves the problems of easy ground subsidence, excessive frictional resistance and jacking failure during the jacking process of an earth pressure balance shield pipe jacking machine. [0004] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/18
Inventor 王笑月徐峰刘聪刘喜才耿晓光何恕张井民李万宝刘玉玲李欣
Owner DAQING PETROLEUM ADMINISTRATION
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