Analysis of Multi-Phase Mixed Slurry Horizontal Section Migration Efficiency in Natural Gas Hydrate Drilling and Production Method Based on Double-Layer Continuous Pipe and Double Gradient Drilling

• Published in: Energies (Basel) Vol. 13; no. 15; p. 3792
• Main Authors: Tang, Yang, Yao, Jiaxin, Wang, Guorong, He, Yin, Sun, Peng
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.08.2020
• Subjects: double-layer continuous-pipe double-gradient drilling; Drilling; Efficiency; Flow velocity; Fluids; migration efficiency; Natural gas; natural gas hydrate; Pipes; pressure regulation; Seawater; Sediments; solid-state fluidized mining

In order to improve the recovery efficiency of natural gas hydrate in solid-state fluidized mining of natural gas hydrate, we solve drilling safety problems, such as narrow density of natural gas hydrate formation pressure window and poor wellbore stability caused by high upstream velocity during dr...