Waterflood process using low molecular weight acrylic acid...
Waterflooding employing mixtures of sulfonate surfactants
Waterflooding employing neutralized organic acids obtained...
Waterflooding employing surfactant solution
Waterflooding employing thickened aqueous liquids
Waterflooding process
Waterflooding process
Waterflooding process with recovery of lost surfactant
Waterflooding using sulfonated polyethoxylated aliphatic...
Waterflooding with an aqueous, saline solution of a...
Wave seal to resist extrusion during equalization
Wear bushing retrieval tool
Wear determination method for a tool cutting element during...
Wear determination of drilling bits
Wear indication apparatus and method
Wear indicators for expandable earth boring apparatus
Wear or thrust plates for hydraulic rock splitting apparatus
Wear protection for tooth brackets on roadway cutting machine
Wear protector for a drilling tool
Wear resistant offset sidebar chain