CA377027A
(fr )
1938-10-11
Fluide a forage des puits
CA377028A
(fr )
1938-10-11
Fluide a forage des puits
CA377335A
(fr )
1938-10-25
Fluide de forage de puits d'huile
CA380896A
(fr )
1939-04-25
Fluide a forage
CA377577A
(fr )
1938-11-08
Fluide non-aqueux a forer
CA376642A
(fr )
1938-09-20
Boue a perforer
CA377312A
(fr )
1938-10-25
Boue a forage
CA372094A
(fr )
1938-02-22
Drille
CA372692A
(fr )
1938-03-22
Riffloir a forer
CA372125A
(fr )
1938-03-01
Perforatrice a roc
CA373762A
(fr )
1938-05-17
Perforatrice a roc
CA374640A
(fr )
1938-06-21
Perforatrice a roc
CA376443A
(fr )
1938-09-13
Perforatrice a roc
CA377003A
(fr )
1938-10-11
Perforatrice a roc
CA377310A
(fr )
1938-10-25
Methode de forage de puits
CA377311A
(fr )
1938-10-25
Methode de forage de puits
CA371961A
(fr )
1938-02-15
Outil actionne par fluide
CA377528A
(fr )
1938-11-08
Fleuret amovible de perforatrice
CA377445A
(fr )
1938-11-01
Fleuret
CA373875A
(fr )
1938-05-17
Monture de perforatrice
CA374133A
(fr )
1938-05-31
Instrument a forer
CA373241A
(fr )
1938-04-19
Outil a aleser
CA378564A
(fr )
1938-12-27
Outil d'alesage
CA383458A
(fr )
1939-08-15
Boue a forage
CA383459A
(fr )
1939-08-15
Boue a forage