Study on Influence Factors to Application of Large-Scale HDD to Oil and Gas Pipe Installation

摘要

Horizontal directional Drilling (HDD) is widely used to install oil and natural gas pipes that have to across river or lake areas in China. With low-cost, environment friendly, high-efficiency, HDD is recommended as the first alternative of the West-to-East natural gas transmission project. However, there are still lots of technology obstacles around large-scale HDD crossing, especially in gravel-cobble strata, soft-hard combining strata, water sensitivity strata. In order to deal with these obstacles and find out the critical factors leading to troubles and failures during HDD crossing, this paper analyzes more than 12 cases of oil and gas pipe installation by HDD technology. Six normal troubles and seven potential factors will be involved to analyze the relationship between troubles and potential factors.