Continuous chain bit development

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Description

The continuous chain drill is a diamond drill bit in which the cutting surface can be replaced while the bit is still in the hole. The first prototype of the chain drill system was fabricated and tested in 1977. Problems were encountered with the mechanism used to cycle the bit. A second prototype bit was designed to circumvent these problems. An accelerated development and test program has provided field test results on Prototype II in less than 2 years. Field testing at Nevada Test Site has proven the feasibility of the downhole changing mechanism. The development and testing of this ... continued below

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Pages: 8

Creation Information

St. Clair, J.A.; Duimstra, F.A. & Varnado, S.G. January 1, 1979.

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Description

The continuous chain drill is a diamond drill bit in which the cutting surface can be replaced while the bit is still in the hole. The first prototype of the chain drill system was fabricated and tested in 1977. Problems were encountered with the mechanism used to cycle the bit. A second prototype bit was designed to circumvent these problems. An accelerated development and test program has provided field test results on Prototype II in less than 2 years. Field testing at Nevada Test Site has proven the feasibility of the downhole changing mechanism. The development and testing of this prototype are described.

Physical Description

Pages: 8

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • Geothermal Resources Council annual meeting, Reno, NV, USA, 24 Sep 1979

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  • Report No.: SAND-79-1433C
  • Report No.: CONF-790906-3
  • Grant Number: EY-76-C-04-0789
  • Office of Scientific & Technical Information Report Number: 6271343
  • Archival Resource Key: ark:/67531/metadc1107292

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

Description Last Updated

  • March 22, 2018, 4:33 p.m.

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St. Clair, J.A.; Duimstra, F.A. & Varnado, S.G. Continuous chain bit development, article, January 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1107292/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.