An elongate element tensioning member
An elongate element tensioning member
An energy transfer assembly
An entry well with slanted well bores and method
An erectable arm assembly for use in boreholes
An expandable hanger and packer
An expandable metal liner for downhole components
An improved apparatus for ground support
An improved coring bit and method for obtaining a material...
An improved coring bit motor and method for obtaining a...
An improved friction washer
An improved rotary roller reamer
An improved rotary roller reamer
An improved transmission sleeve
An improved up-hole hammer drill bit
An in situ extraction process for the recovery of hydrocarbons
An in-hole rock drilling machine
An injection apparatus for injecting an activated fluid into...
An injection, sealing, valving and passageway system
An insert for releasably retaining cutting means in a ground...