![]() Horizontal Directional Drilling-Length Detection Technology While Drilling Based on Bi-Electro-Magnetic Sensing. In addition to the benefits that HDD provides for the logistics of site cleanup, it also delivers sustainability advantages, compared to alternative construction methods. Horizontal directional drilling (HDD) is a relatively new drilling technology that has been successfully adapted to site remediation. Sustainability has become an important factor in the selection of remedies to clean up contaminated sites. Horizontal directional drilling: a green and sustainable technology for site remediation. This report presents information on the HDD and EMWD technologies, demonstration design, results of the demonstrations, and lessons learned.« less The technology demonstration consisted ofmore » the development of one borehole under a mock waste tank at a depth of 70 ft.), the depth needed to obtain access under the Hanford waste tanks, and continue drilling horizontally. The EMWD system represents an innovative blend of new and existing technology that provides the capability of producing real-time environmental and drill bit data during drilling operations. Directional drilling can develop a borehole under a structure, such as a waste tank, from an angled entry and leveling off to horizontal at the desired depth. The use of directional drilling offers an alternative to vertical drilling site characterization. The Environmental Measurement-While- Drilling (EMWD) system and Horizontal Directional Drilling (HDD) were successfully demonstrated at the Mock Tank Leak Simulation Site and the Drilling Technology Test Site, Hanford, Washington. Environmental Measurement-While- Drilling System and Horizontal Directional Drilling Technology Demonstration, Hanford Site
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