Drilling Fluid: Transmit information Never before has the fluid had so much depending on it. Gone are many of the wire line tools. Incoming are the remote control valves, logging tools, MWD. The list is endless. What possibly started out with a bunch of cows munching around in a pool of water has now become a science. As new chemicals come to the market daily, You and I will need to understand there basic functions. Knowing your tools is knowing your job. Drilling fluid is a tool and as said many times. The drilling people that understand drilling fluid will, have a much better understanding of there work When a drilling fluid is controlled and properly maintained, it not only insures proper formation protection, optimum penetration rates, greater well production and lower equipment wear, but can also, within given parameters maximize down hole information. A well bore is drilled to: (1) gather information on formations, such information is then stored as locale information and is used in many other areas not all are involve with the oil industry. Locale area information then becomes part of the regional data bank and it is such information that has allowed scientist to start to pin point much of the worlds past. (2) find and recover usable fluids. A properly controlled drilling fluid is necessary not only to recover adequate rock cuttings for their analysis and study, but also to safely control subsurface pressures, optimize penetration rates for controlling drilling costs, minimize formation damage and therefore maximize well productivity.