Microtunneling meets mother nature

Article Abstract:

The energy plant being constructed under the Ocean Thermal Energy Project requires laying pipelines under the Pacific Ocean. A tunnel is being dug for that purpose. But the basaltic lava, sand, and gravel under the ocean are posing problems. Directional drilling is not possible because of drill pipe failure and the problems of returning drilling fluid. A RVS 800 microtunneling equipment is being used for drilling. The waves, buoyancy of the steel pipe, and lava tubes also make drilling difficult. A submersible buoy is used to recover the microtunneling equipment after drilling.

Usage, Tunnel construction, Pacific Ocean, Observations, Tunneling, Underground pipe lines, Underground pipelines, Drilling machines, Drilling and boring machinery, Boring machines

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Nature on-line

Article Abstract:

Many interesting wildlife sites are available on the World Wide Web. The Birding Canada web site, the North American Butterfly Association web site, the Committee on the Status of Endangered Wildlife in Canada web site, the Plantwatch web site, and an african safari web site are recommended.

Web sites (World Wide Web), Web sites

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Israel: technological and touristic by nature

Article Abstract:

Israel is home to research centers that attract scientists from around the world, and it also is an attractive tourist destination. The increase in tourism is the result of factors such as infrastructure improvements, better public relations and the Middle East peace talks.

Analysis, Economic aspects, Israel, Travel industry

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