METHOD AND APPARATUS TO CONTROL MODE OF FACE HYDRAULIC ENGINE OPERATION DURING OIL WELL DRILLING PROCESS Russian patent published in 1995 - IPC

FIELD: oil extracting industry. SUBSTANCE: to increase efficiency of drilling, string of drilling pipes is lifted over face of oil-well, frequency of face engine idle mode rotation is measured and they exercise automatic identification of operational frequency of rotation, that corresponds to maintained in drilling process mode of maximum mechanical power, transferred to drill bit. In the case, moment of next identification is determined by amount of pumped mud at inlet of drilling string or by value of drilling mud pressure in pumping line of bore hole. Apparatus to realize the method has working frequency of rotation identification unit, input of which is connected with comparator and output - with microprocessor unit of control. EFFECT: methods and apparatus are used to control mode of operation of face hydraulic engines during oil wells drilling. 4 cl, 1 dwg