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Saturated saltwater mud

A salt water and mud technology, applied in the field of cement slurry, can solve the problems of stuck drilling, mud dispersibility, collapse of holes, etc., and achieve the effects of improving economic benefits, reducing engineering costs, and solving high costs.

Active Publication Date: 2011-06-01
DAQING PETROLEUM ADMINISTRATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fresh water slurry is easily eroded by salt water in the ocean or salt-dissolved formation, which will deteriorate the dispersion of the mud, cause the mud to fail, and cause the drilled hole to collapse and stick, resulting in the failure of horizontal directional drilling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1. The saturated brine slurry of the present invention is applied to the horizontal directional crossing project of the Karaba Trench. The diameter of the crossing pipeline is φ1016mm, and the crossing length is 1420m. The horizontal directional drilling was successfully completed without hole collapse and drill sticking in the crossing project.

Embodiment 2

[0012] Embodiment 2. The saturated brine slurry of the present invention is applied to the horizontal directional crossing project of the Yewangchun Trench. The diameter of the crossing pipeline is φ1016mm, and the crossing length is 759m. The horizontal directional drilling was successfully completed without hole collapse and drill sticking in the crossing project.

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PUM

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Abstract

The invention relates to a saturated saltwater mud which comprises the following components: 55-65 Kg / m<3> of sodium bentonite, 15-25 Kg / m<3> of sodium carbonate, 25-40 Kg / m<3> of sodium hydroxide, 2.4-2.6 Kg / m<3> of polyacrylamide of which the molecular weight is 17-20 million, 2.6-3.1 Kg / m<3> of sodium carboxymethyl cellulose, 2.8-3.2 Kg / m<3> of 5# white oil lubricant, 1-2 Kg / m<3> of bis-imidazoline quaternary ammonium salt corrosion inhibitor, and the balance of saturated saltwater or sea water. The saturated saltwater mud provided by the invention is suitable for horizontal directional drilling under the ocean or karst stratum condition. The invention can be used for implementing large-diameter long-distance pipeline horizontal directional drilling under the ocean or coastal area and karst construction conditions.

Description

Technical field [0001] The present invention involves a large -caliber long -distance pipeline horizontal orientation drilling the cement slurry, especially a saturated saline cement slurry. Background technique [0002] At present, the mud applied during the horizontal directional drilling process is a light cement slurry composed of calcium -based pussy soil, which is not adapted to the horizontal direction of the ocean or salt -soluble strata.Fresh cement slurry is easily eroded in salt water on the ocean or salt -soluble ground layer, which decentralized the mud, and the mud will fail. There is a lavex of the hole in the drill and the card diamond, resulting in the failure of the horizontal directional drill. Invention content [0003] The purpose of the present invention is to overcome the lack of existing technology and provide a saturated salt cement slurry.The saturated salt cement slurry of the present invention is suitable for horizontally directional incense under the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24C09K8/22C09K8/20C09K8/16
Inventor 王笑月徐峰尹志杰黄国斌
Owner DAQING PETROLEUM ADMINISTRATION
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