Initially developed in the US,the idea of installing a pipeline that could not only be placed in the ground without the need for major excavation but also steered along a desired course was heralded as a significant b...Initially developed in the US,the idea of installing a pipeline that could not only be placed in the ground without the need for major excavation but also steered along a desired course was heralded as a significant breakthrough for the construction industry.Over the intervening years,the variety of HDD machine available has increased,as has installation size and bore-length capability.In this paper,the author looks at some of the companies in the rig-supply market and their installation capabilities.展开更多
文摘Initially developed in the US,the idea of installing a pipeline that could not only be placed in the ground without the need for major excavation but also steered along a desired course was heralded as a significant breakthrough for the construction industry.Over the intervening years,the variety of HDD machine available has increased,as has installation size and bore-length capability.In this paper,the author looks at some of the companies in the rig-supply market and their installation capabilities.
