CA1004662A
(en )
1977-02-01
Method for laser drilling subterranean earth formations
AR200419A1
(es )
1974-11-08
Metodo de investigar formaciones terrestres atravesadas por una perforacion
AR207541A1
(es )
1976-10-15
Metodo de fracturar una formacion rocosa
AR208118A1
(es )
1976-11-30
Procedimiento para producir una fractura inducida hidraulicamente en una formacion subterranea
JPS51149801A
(en )
1976-12-23
Device and method for orienting compound drill string
MX4680E
(es )
1982-07-28
Metodo mejorado para investigar formaciones de arcilia atravesadas por una perforacion
SE415538B
(sv )
1980-10-13
Djuphalsborr
SE414417B
(sv )
1980-07-28
Bergborrmaskin
BR7800878A
(pt )
1979-01-02
Formacao subterranea contendo xisto
BR7802530A
(pt )
1978-11-14
Processo de formar,em uma formacao subterranea contendo xisto,uma retorta de xisto in situ e grupo de escavacoes em uma formacao subterranea contendo xisto
AT348560B
(de )
1979-02-26
Stichlochbohr- und -stopfmaschine
AR208232A1
(es )
1976-12-09
Metodo de fracturar una formacion subterranea penetrada por una perforacion
DK360776A
(da )
1977-02-14
Sammensat borerorforlengelse til et jordslagbor
JPS5268704A
(en )
1977-06-07
Method of timbering continuously in hole excavated by earth auger
IE41088B1
(en )
1979-10-10
Studded cutting tip for drilling rock by means of an in-hole side-blowing drill
CA1024503A
(fr )
1978-01-17
Methode de forage de trous horizontaux dans les formations
AU1363876A
(en )
1977-11-10
Borehole drilling device
JPS522804A
(en )
1977-01-10
Rock drilling bit
JPS543344A
(en )
1979-01-11
Method of excavating underground hole by tunnel boring machine
AU496529B2
(en )
1978-04-06
Method for laser drilling subterranean earth formations
CA933146A
(en )
1973-09-04
Method of drilling and casing a large diameter borehole
CA900842A
(en )
1972-05-23
Method of forming two vertically disposed fractures from a well penetrating a subterranean earth formation
AU1062770A
(en )
1970-04-30
Method and apparatus for impact drilling of overburden (apparatus for raising drill string)
AU493144B2
(en )
1975-11-13
Horizontal drill rig for deep drilling to remote areas anda method of drilling
JPS51121401A
(en )
1976-10-23
Method of investigating strata wherf drilling passes through