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Drilling rig instrumentation systems, namely, remote choke drilling chokes, drilling rig pit volume totalizers, and electronic drilling rig data recorder systems comprising a computer network and computer software to provide drilling data during the drilling process; and drilling instrumentation systems, namely, electronic drilling tour sheets and gas detection instruments, namely, flame ionization detectors, and drilling data base systems comprising electronic data acquisition, storage, and display units, namely, computer hardware and computer software which prepares geological strip logs