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Aids to utilization of a shallow penetration sea-floor sitting drill
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1971
[PDF-4.96 MB]
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Description:"Drilling and sampling in the marine environment present a number of problems unique to the ocean-oriented investigators. This paper is concerned with one of these problems. The initial penetration of a marine sediment to a depth of + 10 feet deep is the most difficult in which to obtain reliable, relatively undisturbed samples, rapidly. Suspending a drilling tool over the side of a ship and under water, where visibility often is zero, raises problems relating to assuring that the penetration into the marine sediments is perpendicular to the sea floor. One way to solve this problem is presented here in the description of a break-away tripod, which provides support for the initial penetration, and then collapses to allow further penetration. The drilling/sampling tool described can be suspended over the side of a small ship by a cable, with an air hose from the ship as an umbilical connection for operation."
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Rights Information:CC0 Public Domain
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Compliance:Library
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