Boring tool locating using sensing at spaced apart reference...

Boring tool tracking system and method using magnetic...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Boring tool tracking/guiding system and method with...

Bottom system for geophysical survey (variants)

Broadband resistivity interpretation

Broadband resistivity interpretation

Buried cable locating system

Buried closure guard with electronic marker

Buried pipe locator utilizing a change in ground capacitance

Cable connection head for a well logging cable useful at high te

Cable-type electromagnetic receiver system for subsurface...

Caddy for metal detector

Calibrating and compensating influence of casing thickness varia