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GB8826722D0
|
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Assemblies for supporting electrical circuit boards within tubes
|
|
US4848144A
|
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Method of predicting the torque and drag in directional wells
|
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GB8817261D0
|
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Down-hole bearing assemblies for maintaining survey instrument assembly & core barrel orientation
|
|
GB8704076D0
|
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Accelerometers
|
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IE870321L
|
|
Assemblies for supporting electrical circuit boards within¹tubes
|
|
GB8621385D0
|
|
Improvements in or relating to the surveying of boreholes
|
|
GB8606638D0
|
|
Drilling-mud-lubricated rotary bearing sleeves
|
|
GB8603122D0
|
|
Assemblies for supporting electrical circuit boards within tubes
|
|
GB8601523D0
|
|
Surveying of boreholes
|
|
GB8527055D0
|
|
Surverying of borehole
|
|
GB8523453D0
|
|
Down-hole devices for imparting rotary motion
|
|
GB8425110D0
|
|
Devices for imparting rotary motion
|
|
GB8332921D0
|
|
Improvements in or relating to apparatus for signalling within a borehole while drilling
|
|
GB8331111D0
|
|
Signalling within borehole whilst drilling
|
|
US4562559A
|
|
Borehole acoustic telemetry system with phase shifted signal
|
|
US4505155A
|
|
Borehole pressure measuring system
|
|
EG15516A
|
|
Improvement in or relating to surverying a borehole
|
|
AU1854783A
|
|
Surveying a borehole
|
|
GB8322535D0
|
|
Borehole surveying
|
|
NL8302429A
|
|
Device for processing signals in a drilling hole during drilling.
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