GB2226408B
(en )
1992-10-07
Method of determining the depth of a hydraulic fracture zone in the earth
GB2217012B
(en )
1992-03-25
Method of determining drill bit wear
GB8812468D0
(en )
1988-06-29
Method of measurement of azimuth of borehole while drilling
GB2221940B
(en )
1992-08-05
Well drilling fluid and method of drilling employing said fluid
GB2233370B
(en )
1993-08-04
Method of controlling lost circulation in well drilling
GB2257997B
(en )
1993-05-12
Straight hole drilling method
GB8924083D0
(en )
1989-12-13
Rock drilling apparatus and method
GB8817215D0
(en )
1988-08-24
Method of determining porosity of underground formation being drilled
GB2202472B
(en )
1990-11-21
Method of and an arrangement for controlling rock drilling.
EP0393197A4
(en )
1991-01-02
Method of forming underground passage and tunnel excavator
GB8801881D0
(en )
1988-02-24
Method of locating member in borehole
GB8530655D0
(en )
1986-01-22
Drilling circular boreholes in soil
GB2213179B
(en )
1992-02-19
Percussion drill and method of controlling such a drill
ZA917958B
(en )
1992-06-24
Method of drilling holes in rock
GB8913647D0
(en )
1989-08-02
Method of drilling and lining a borehole
PL270853A1
(en )
1989-09-04
Method of lining walls of bore-holes drilled in soil
PL280776A1
(en )
1991-01-28
Method of activating geothermal bore-holes
SU1488502A1
(en )
1989-06-23
Method of consolidating rock
SU1488508A1
(en )
1989-06-23
Method of consolidating rock
PL280265A1
(en )
1991-01-14
Method of deepening single mine shafts
PL279101A1
(en )
1989-12-11
Method of and apparatus for drilling bore-holes in soil
SU1592479A1
(en )
1990-09-15
Method of determining power input at hole bottom of drilled well
SU1592497A1
(en )
1990-09-15
Method of excavating pillars
PL272185A1
(en )
1988-11-24
Method of hydromechanically backfilling post-exploitation areas in particular those involing sulfur mining through bore-holes
PL292685A1
(en )
1993-06-14
Method of mining useful minerals through bore-holes