Horizontal directional drilling (HDD) machines are steerable, trenchless drilling rigs for the installation ... The second step involves replacing the drill head with a reaming device such as a ...

Horizontal Directional Drilling (HDD) is a critical technology ... infrastructure in urban areas. End-users of HDD technology include oil and gas companies, utility providers, and ...

Where possible, the entry point should be located close to anticipated adverse subsurface conditions. Regardless of the planning effort, sometimes it is not possible to fit all the required HDD ...

Citing a “toxic drilling fluid leak” in Rhode Island last month, environmental groups - and lawmakers - are urging state ...