242538 ⎘
Earth boring, well treating, and oil field chemistry Indicating means, e.g. dye, fluorescing agent
Method of tracking fluids produced from various zones in subterranean well
#2Method of manufacture and the use of a functional proppant for determination of subterranean fracture geometries
#3Method of manufacture and the use of a functional proppant for determination of subterranean fracture geometries
#4Method for monitoring degradation of lubricating oils