Ground water monitoring device and method

Guide for attachment to a roof bolter to allow for core...

Guide for sidewall coring bit assembly

High-pressure waterjet/abrasive particle-jet coring method and a

Hydraulic inner barrel in a drill string coring tool

Hydraulically pulsed indexing system for sleeve-type core barrel

Locking device for a wire line core drilling system and a...

Measurement while drilling tool with interconnect assembly

Method and an apparatus for taking and analyzing level determine

Method and apparatus for continuous pilot hole coring

Method and apparatus for core-sampling subsurface rock formation

Method and apparatus for coring rock

Method and apparatus for coring with an in situ core barrel spon

Method and apparatus for obtaining a core sample at ambient pres

Method and apparatus for obtaining saturation data from subterra

Method and apparatus for pressure coring with non-invading gel

Method and apparatus for preventing contamination of a coring sp

Method and apparatus for reducing field filter cake on sponge co

Method and apparatus for removing mudcake from borehole walls

Method and apparatus for stabilizing borehole cores