GB2182150B
(en )
1989-10-18
Method and apparatus for investigating drilling conditions in a borehole
GB2205954B
(en )
1991-06-12
Method and apparatus for measurement of azimuth of a borehole while drilling
GB2225118B
(en )
1993-04-07
Method and apparatus for measurement of azimuth of a borehole while drilling
GB2210087B
(en )
1991-09-04
Wireline well test apparatus and method
EG18615A
(en )
1993-08-30
Method and apparatus for subsurface formation evaluation
GB2208717B
(en )
1992-01-02
Method and apparatus for measuring resistivity of geologic formations
EP0409361A3
(en )
1991-03-27
Downhole seismic exploration device and apparatus
GB2094865B
(en )
1985-12-18
Methods of and apparatus for effecting logging or servicing operations in boreholes
EP0261825A3
(en )
1989-08-23
Method and apparatus for acoustic logging of boreholes
EP0224408A3
(en )
1988-09-07
Apparatus and method for hard rock sidewall coring in a borehole
EP0251671A3
(en )
1989-07-05
Method and apparatus for determining changes in length of a well logging cable
EP0159270A3
(en )
1988-05-18
Method and apparatus for determining properties of subsurface formations
ZA88413B
(en )
1988-07-06
Method of excavation and apparatus therefor
GB2137353B
(en )
1986-09-24
Method and apparatus for locating the stuck point of a pipe in a borehole
GB8924083D0
(en )
1989-12-13
Rock drilling apparatus and method
GB8912393D0
(en )
1989-07-12
A method of and an arrangement for drilling a hold in a rock
ZA877664B
(en )
1988-04-15
Method and apparatus for determining the profile of a subterranean passage
DE2962844D1
(en )
1982-07-01
Method and apparatus for measuring the hardness of rock in a borehole
GB2213853B
(en )
1991-12-11
Method in rotary drilling and rotary drilling apparatus
GB2183831B
(en )
1989-11-01
Method and apparatus for determining the porosity of geological formations
DE3663854D1
(en )
1989-07-13
Method of and apparatus for optically measuring displacement
GB2148012B
(en )
1987-04-01
Induced magnetic field borehole surveying method and probe
DE3663055D1
(en )
1989-06-01
Apparatus and method for determining the orientation of fractures in a geological formation
EP0219127A3
(en )
1989-10-25
Method of and apparatus for optically measuring displacement
ZA87513B
(en )
1987-09-30
Method of exploration for uranium and petroleum