File:Early rotary drill bits.jpg

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Summary

Description
English: Early rotary drill bits
Date
Source OIL FIELDS OF THE TEXAS-LOUISIANA GULF COASTAL PLAIN, USGS Bulletin 282, https://pubs.usgs.gov/bul/0282/report.pdf
Author N.M. Fenneman

Licensing

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Captions

Early rotary drill bits

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Date/TimeThumbnailDimensionsUserComment
current15:22, 12 August 2020Thumbnail for version as of 15:22, 12 August 2020516 × 884 (116 KB)Pi3.124Uploaded a work by N.M. Fenneman from OIL FIELDS OF THE TEXAS-LOUISIANA GULF COASTAL PLAIN, USGS Bulletin 282, https://pubs.usgs.gov/bul/0282/report.pdf with UploadWizard

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