Process and composition for cementing wells passing through...

Process and composition for inhibiting scale deposition

Process and composition for the secondary recovery of...

Process and device for boring holes

Process and device for generating signals which can be...

Process and device for hydraulically and selectively...

Process and device for metering and servicing in a high...

Process and device for obtaining unadulterated samples of...

Process and device for screwing a threaded joint in a tube...

Process and device for simultaneously drilling and lining a...

Process and device for the thermal stimulation of gas...

Process and device using a liquid agent for treating a...

Process and devices for closing-off high pressure and high...

Process and drilling equipment for sinking a well in...

Process and equipment for oil well drilling and completing...

Process and fluid for the recovery of oil in reservoirs with...

Process and installation for drilling holes in the earth's...

Process and installation for in-situ gasification of coal

Process and means for assessing the position and angularity...

Process and plug for well abandonment