DIGITAL DEVICE FOR MEASURING DRILLING PARAMETERS Russian patent published in 1997 - IPC

FIELD: drilling of oil and gas wells. SUBSTANCE: this is intended for measuring weight, load, pressure, and mechanical speed. Measuring and indication are performed according to signal from weight sensor 1 which goes through scaling unit 5 and commutator 4 and is converted from analog into digital by converter 9. Then signal goes to memory register 12 where it is memorized and indicated on digital indicator 19. Simultaneously this signal goes to memory register 13 where it is memorized at moment of pushing on button 22 "Registration of initial weigh". Continuously coming to one of inputs of computing unit 17 is signal proportional to current weight of drilling tool. In same unit 17 taking place is comparing value of current weight and initial weight. Resulting signal determines load value and through memory register 16 goes to digital indicator 20 "Loads". Measuring and indication of pressure are effected according to signal from programming unit 18 which changes channel by commutator 8, and signal from pressure sensor 2 through scaling unit 6 and commutator 8 goes to digital converter 9. Here analog signal takes digital form and goes through memory register 14 to digital indicator "Pressure". EFFECT: high efficiency. 1 dwg