AU7144391A
(en )
1991-07-24
Progressive cavity drilling apparatus with flow restrictor
GB2239279B
(en )
1993-06-16
Method of analysing and controlling a fluid influx during the drilling of a borehole
EP0429254A3
(en )
1992-04-08
Drilling a bore hole in the earth
GB2248865A
(en )
1992-04-22
Lost circulation fluid for oil field drilling operations
EP0466472A3
(en )
1993-03-17
Annulus pressure responsive downhole testing tool
GB2288838B
(en )
1996-07-24
A device for drilling holes in the crust of the earth, especially for drilling oil wells
GB2251876B
(en )
1994-12-21
Well drilling fluid
GB2284887B
(en )
1997-12-10
Method of analysing drilling fluids
GB8806465D0
(en )
1988-04-20
Flow pulsing apparatus for down-hole drilling equipment
EP0321130A3
(en )
1990-06-06
Oil-based well bore fluids and gellants therefor
GB2257997B
(en )
1993-05-12
Straight hole drilling method
GB2245015B
(en )
1993-08-18
Tubing conveyed wellbore fluid flow measurement apparatus
GB8919498D0
(en )
1989-10-11
Wellbore fluid sampling apparatus
GB9111481D0
(en )
1991-07-17
Drilling fluid
GB2218739B
(en )
1991-12-04
Method and apparatus for the recovery of formation fluids subterranean well bore
ZA902594B
(en )
1991-01-30
A rock drilling apparatus
ZA9010346B
(en )
1991-10-30
High pressure downhole progressive cavity drilling apparatus with lubricating flow restrictor
GB9013757D0
(en )
1990-08-08
Drilling fluid
CS579989A3
(en )
1992-06-17
Drilling device for drilling bores with undercut
GB2245294B
(en )
1994-08-24
Drilling fluid
SU1769963A1
(en )
1992-10-23
Equipment for drilling fluid clearing
HU885506D0
(en )
1991-07-29
Process for the forcing of boreholes, primarily used for oil drilling, and apparatus for the realization of the process
GB9018091D0
(en )
1990-10-03
Undercut tapered bore drill
GB9306665D0
(en )
1993-05-26
True oil drilling liquid
SU1592471A1
(en )
1990-09-15
Device for eliminating drill pipe string seizure in hole