Drill string (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Drill string" in English language version.

refsWebsite

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676^th place

espacenet.com

US 2243, Morris, William, "Manner of uniting augers to sinkers for boring artesian wells", published 1841-09-04
US 78958, Guillod, Edward, "Improvement in the construction of drilling-jars", published 1868-06-16, assigned to Bryan Dillingham & Co.
US 2972380, Bodine Jr., Albert G., "Acoustic method and apparatus for moving objects held tight within a surrounding medium", published 1961-02-21