Experiments for Selecting the Optimal Foam Drilling Fluid Formula
- Authors: Yong L.1, Qian L.2, Aiguo Y.1, Xianyong Z.1
-
Affiliations:
- Faculty of Engineering, China University of Geosciences
- College of Environment and Civil Engineering, Chengdu University of Technology
- Issue: Vol 52, No 3 (2016)
- Pages: 340-345
- Section: Article
- URL: https://journals.rcsi.science/0009-3092/article/view/234556
- DOI: https://doi.org/10.1007/s10553-016-0713-2
- ID: 234556
Cite item
Abstract
Drilling gas-drainage holes in soft coal seams is essential for preventing coal and gas explosions. After analyzing and summarizing the advantages and disadvantages of existing spiral drilling and wind-pressure drilling processes, a new technology of drilling in soft coal seams using a foam drilling fluid is proposed in this paper. Experiments were conducted to determine the optimal drilling fluid formula for drilling to depths greater than 200 m. The most effective foam stabilizers are selected and correlations of foam half-life and volume with stabilizer concentration were found. Based on an analysis and comparison of all drilling fluid formulas, the recommended additives are 5% K12 + 0.6% Sesbania powder + 1.0% Konjac powder or 5% K12 + 0.8% Sesbania powder + 1.0% HEC. In field tests, five holes deeper than 200 m were drilled successfully by using this formula.
About the authors
Liu Yong
Faculty of Engineering, China University of Geosciences
Email: a.yao@cug.edu.cn
China, Wuhan
Li Qian
College of Environment and Civil Engineering, Chengdu University of Technology
Email: a.yao@cug.edu.cn
China, Chengdu
Yao Aiguo
Faculty of Engineering, China University of Geosciences
Author for correspondence.
Email: a.yao@cug.edu.cn
China, Wuhan
Zhang Xianyong
Faculty of Engineering, China University of Geosciences
Email: a.yao@cug.edu.cn
China, Wuhan