Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to FR809303ApriorityCriticalpatent/FR1241936A/fr
Application grantedgrantedCritical
Publication of FR1241936ApublicationCriticalpatent/FR1241936A/fr
E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B7/00—Special methods or apparatus for drilling
E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Landscapes
Life Sciences & Earth Sciences
(AREA)
Engineering & Computer Science
(AREA)
Geology
(AREA)
Mining & Mineral Resources
(AREA)
Physics & Mathematics
(AREA)
Environmental & Geological Engineering
(AREA)
Fluid Mechanics
(AREA)
General Life Sciences & Earth Sciences
(AREA)
Geochemistry & Mineralogy
(AREA)
FR809303A1959-11-041959-11-04Perfectionnements apportés aux procédés et dispositifs pour forer des trous dans des terrains ou roches friables
ExpiredFR1241936A
(fr)
Perfectionnements apportés aux dispositifs et procédés pour creuser progressivement des couloirs d'abattage, plus spécialement des couloirs miniers souterrains