continuous chain wire rope systemcontinuous coringcontinuous decantercontinuous dipmetercontinuous fiowmetercontinuous gas detection by mud loggingcontinuous gas generationcontinuous inclinometercontinuous intersticecontinuous mud weight recordercontinuous samplingcontiunous inslinometercontour flooding cecter to edge floodingcontour intervalcontouringcontrol headcontrol valvecontrollable pitch propeller c pcontrolled directional drilling controlledconventional bitconventional drillingconventional electric logging deviceconventional mudconvergence map isopach map ispachous mapcoolantcoolercooling agentcooling effectcooling watercooling water tubecoralline faciescore barrelcore barrel headcore barrel shoecore bit core drillcore boring core drilling coringcore brarrel ringcore breaker core catcher core trapringcore cutter head core head cutter headcore diametercore drill core drilling core well corecore drill core drilling structure drillingcore extractor core lifter core pushercore flakecore flushingcore holdercore holecore of sycline trough corecore pusher plungercore recovery recovery of core