135655 ⎘
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells Melting minerals, e.g. sulfur
Production of hydrocarbon using direct-contact steam generation
#2High-power microwave borehole fracturing device for engineering rock mass
#3Production of hydrocarbon using direct-contact steam generation
#4Methods of Modifying Formation Properties
#5Selectively corrodible downhole article and method of use
#6Method and device for excavating submerged stratum