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Home > Archive>Volume 52, Issue 2, 2025 >59-64. DOI:10.12143/j.ztgc.2025.02.008
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The application of dual-polymer anti-sloughing flushing fluid for drilling in covering layers
Author:
Affiliation:

1.Yantai Center of Coastal Zone Geological Survey, China Giological Survey, Yantai Shandong 264001, China;2.Technology Innovation Center of Marine Land Integrated Drilling Engineering, Yantai Shandong 264001, China

Clc Number:

P634.6

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    Abstract:

    During the drilling process in the covering layer of Zhumadian area in Henan Province， the Quaternary clay layer， sandy mudstone， loose sandstone unevenly interbedded with mudstone were encountered， resluting in difficult wall protection， prone to accidents such as block jamming， hole collapse and burial， and difficult in taking cores. Based on the geological conditions and the drilling construction data within the area， the dual-polymer anti-sloughing flushing fluid was used. In the on-site application， the stability of the hole wall was good during the drilling process of the long open hole well section， without any incidents of falling or collapes. The core recovery rate can meet the geological design requirements， moreover， the casing depth and construction cost were reduced.

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History
  • Received:August 17,2024
  • Revised:September 05,2024
  • Adopted:November 01,2024
  • Online: March 25,2025
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