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Primary Examiner: Purser, Ernest R.
Assistant Examiner:
Attorney: Cagney; J. Patrick

Next ten patents ordered by date:

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Title: Earth boring method employing high powered laser and alternate fluid pulses

Abstract: A method of earth boring, useful for oil well drilling and the like, employs a high powered laser beam focused and directed by appropriate optics and/or scanning means to a vertically downwardly directed annular pattern. A fluid blast means directed generally into the bore hole is disposed adjacent the beam between the earth and the optics or scanning means. The beam and fluid blast are alternately pulsed and the fluid blast is effective to create thermal shock in the core to shatter it and to deflect material cleared from the hole by the laser beam away from the boring apparatus.

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Inventors: Salisbury, Winfield W. (Belmont, MA, US)
Stiles, Walter J. (Tuscon, AZ, US)

Application Number: 525442
Filing Date: 1974-11-20
Publication_date: 1976-12-21
Assignee:
Primary Class(es): 175/16 299/14
Other Classes:
US Patent Ref:

914636	Mar, 1909	Case	175/15.
2548463	Apr, 1951	Blood	175/15.
3539221	Nov, 1970	Gladstone	175/16.
3544165	Dec, 1970	Snedden	175/16.
3556600	Jan, 1971	Shoupp et al.	175/16.
3693718	Sep, 1972	Stout	175/16.
3882945	May, 1975	Keenan	175/16.

Other Refs: Other References: "Novel Drilling Techniques," by Wm. C. Maurer, Mar. 1968, N. Y. Pergamon Press.