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Betonite for non-excavation drilling fluid

A technology of bentonite and drilling fluid is applied in the field of bentonite, bentonite and water-sensitive stratum trenchless horizontal directional drilling used in drilling fluid, which can solve the problems of improper use of drilling fluid, problem of hole wall stability, and poor quality of bentonite, etc. Achieve cost-effective, stable hole wall, high pulping rate

Active Publication Date: 2013-08-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When trenchless horizontal directional drilling crosses obstacles such as urban pipeline networks, rivers and lakes, and farmland, it often encounters water-sensitive formations such as clay layers, silt silt layers, and mud shale. At this time, the stability of the hole wall The stability of the bentonite has become a big problem, often due to improper use of drilling fluid or poor quality of bentonite, resulting in instability of the hole wall or even project scrapping

Method used

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  • Betonite for non-excavation drilling fluid
  • Betonite for non-excavation drilling fluid
  • Betonite for non-excavation drilling fluid

Examples

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Embodiment 1

[0018] The bentonite for non-excavation drilling fluid provided in this embodiment is mixed by the dry powder of sodium bentonite, polymer and shale inhibitor, and the mass ratio between sodium bentonite, polymer and shale inhibitor is 15:1.75:2.75, wherein the sodium bentonite sodium bentonite is sodium bentonite produced in Weifang, Shandong, the polymer is konjac, and the shale inhibitor is polyethylene glycol PEG-10000.

[0019] The method for adopting the bentonite configuration drilling fluid provided in the present embodiment may further comprise the steps:

[0020] According to the People's Republic of China Petroleum and Natural Gas Industry Standard "Bentonite for Drilling Fluid Test" (SY5490-93) to prepare drilling fluid: add water to the container (mud cup), then add bentonite for trenchless drilling fluid, and add bentonite per 100mL of water The amount is 3g, stir at high speed for 5 minutes, pause to scrape the cup wall, continue to stir for 15 minutes, cover an...

Embodiment 2

[0044] The bentonite for non-excavation drilling fluid provided in this embodiment is mixed by the dry powder of sodium bentonite, polymer and shale inhibitor, and the mass ratio between sodium bentonite, polymer and shale inhibitor is 16:2:3, wherein the sodium bentonite sodium bentonite is sodium bentonite produced in Xiazijie, Xinjiang, the polymer is konjac, and the shale inhibitor is polyalcohol JLX.

[0045] The method for adopting the bentonite configuration drilling fluid provided in the present embodiment may further comprise the steps:

[0046] According to the People's Republic of China Petroleum and Natural Gas Industry Standard "Bentonite for Drilling Fluid Test" (SY5490-93) to prepare drilling fluid: add water to the container (mud cup), then add bentonite for trenchless drilling fluid, and add bentonite per 100mL of water The amount is 3g, stir at high speed for 5 minutes, pause to scrape the cup wall, continue to stir for 15 minutes, cover and let stand for 16 ...

Embodiment 3

[0061] The bentonite for non-excavation drilling fluid provided in this embodiment is mixed by the dry powder of sodium bentonite, polymer and shale inhibitor, and the mass ratio between sodium bentonite, polymer and shale inhibitor is 17:2.25:3.25, wherein the sodium bentonite sodium bentonite is sodium bentonite produced in Xiazijie, Xinjiang, the polymer is konjac, and the shale inhibitor is polyethylene glycol PEG-10000.

[0062] The method for adopting the bentonite configuration drilling fluid provided in the present embodiment may further comprise the steps:

[0063] According to the People's Republic of China Petroleum and Natural Gas Industry Standard "Bentonite for Drilling Fluid Test" (SY5490-93) to prepare drilling fluid: add water to the container (mud cup), then add bentonite for trenchless drilling fluid, and add bentonite per 100mL of water The amount is 3g, stir at high speed for 5 minutes, pause to scrape the cup wall, continue to stir for 15 minutes, cover a...

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Abstract

The invention discloses a betonite for a non-excavation drilling fluid. The betonite is a mixture of the dry powders of sodium bentonite, polymer and a shale inhibitor in a mass ratio of (15-17):(1.75-2.25):(2.75-3.25), wherein the polymer is konjac. The pulping rate of betonite is not less than 30m<3> / T, and compared with a common drilling fluid betonite, the betonite has the advantages of higher pulping rate, convenience in use and better cost performance. A drilling liquid prepared by using the betonite has good rheological property, de-filtration property and a good inhibition effect, and can satisfy requirements on debris carrying and hole wall stability of water sensitive stratum during non-excavation horizontal directional drilling.

Description

technical field [0001] The invention provides a bentonite, in particular to a bentonite used for drilling fluid in a trenchless process, which is particularly suitable for trenchless horizontal directional drilling in water-sensitive formations, and belongs to the field of geological drilling. Background technique [0002] When trenchless horizontal directional drilling crosses obstacles such as urban pipe networks, rivers and lakes, and farmland, it often encounters water-sensitive formations such as clay layers, silt silt layers, and mud shale. At this time, the stability of the hole wall The stability of the bentonite has become a big problem, often due to improper use of drilling fluid or poor quality of bentonite, resulting in instability of the hole wall or even project scrapping. By choosing high-quality and high-efficiency bentonite, the viscosity, shear force and inhibition effect of drilling fluid can be effectively improved, the filtration loss can be reduced, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/32C09K8/14
Inventor 蔡记华袁野曹伟建
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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