CA531499A
(fr )
1956-10-09
Perforatrice a papier
CA433843A
(fr )
1946-03-26
Fluide a forage de puits
CA437191A
(fr )
1946-10-01
Perforatrice
CA434985A
(fr )
1946-05-28
Empechement des pertes de fluide dans trous de puits
CA434669A
(fr )
1946-05-14
Perforatrice
CA438165A
(fr )
1946-11-26
Perforatrice a roc
CA435897A
(fr )
1946-07-23
Foreuse
CA433211A
(fr )
1946-02-26
Foret de perforatrice
CA432854A
(fr )
1946-01-29
Outil actionne par fluide
CA432897A
(fr )
1946-01-29
Foret de la pointe de tour
AU130564B2
(en )
Hand drill
CA433342A
(fr )
1946-03-05
Appareil a perforer des puits profonds
CA432348A
(fr )
1946-01-08
Dispositif de perforatrice
CA436452A
(fr )
1946-08-20
Methode de perforer
CA434467A
(fr )
1946-04-30
Fluide d'amortissement
CA435898A
(fr )
1946-07-23
Pointe de foreuse
CA433937A
(fr )
1946-04-02
Perforatrice diamantee
CA436738A
(fr )
1946-09-03
Accouplement a fluide
CA434057A
(fr )
1946-04-09
Machine a percer
CA433438A
(fr )
1946-03-05
Machine a percer
CA434007A
(fr )
1946-04-09
Machine a percer
CA434056A
(fr )
1946-04-09
Machine a percer
CA438552A
(fr )
1946-12-17
Machine a percer
CA434607A
(fr )
1946-05-07
Chevalement de sondage
CA434852A
(fr )
1946-05-21
Meche helicoidale