Annular sample chamber, full bore, APR.RTM. sampler
Annulus pressure operated closure valve with reverse circulation
Anti-freezing method and apparatus for ground surrounding liquif
Anti-wobbling bailer with high speed insertion
Apparatus and method for buffering submerged conduits
Apparatus and method for capturing and retrieving liquid sample
Apparatus for delivering a flowable substance to a remote...
Apparatus for enhanced bioremediation of underground contaminant
Apparatus for extracting oil or other fluids from a well
Apparatus for guiding a load between a surface apparatus and a s
Apparatus for injecting material into a well-bore
Apparatus for setting a bottom tool
Composition of matter useful for earthen formation treatment
Compressor-assisted annular flow
Controlled buoyancy underwater riser system
Controlled slow descent bailer
Delayed acting gravel pack fluid loss valve
Delayed opening fluid sampler
Device for the transfer of plugging and grouting materials to, a
Down hole well tool with pressure relief chamber