China oil network news reporter was informed that in September 15th, Jilin oilfield successfully developed PDC bit application, after the drilling speed increased by 238%, single bit penetration rate increased more than two times.
Wells deep tight gas in the Dehui area of Jilin oilfield has low drilling rate, less frequent tripping footage, etc.. Aiming at the problems of sand shale interlayer, gravel layer development, rock abrasiveness and poor drilling ability, the researchers proposed a speed increase scheme with individual PDC bit and straight screw combination drilling. Through thorough research, the drilling data are carefully summarized, and the failure forms of the PDC bit in the lower formation are analyzed, and the individual design of the bit is carried out to improve the frontal impact capacity and prolong the service life of the bit.
Field tests were carried out in Jilin oilfield in from September 8th to 12th in well de 80. A drill from a 3271 meter deep wells drilled to 3552 meters, the average penetration rate of about 5.54 M / h. Using this technique, per day increased to 100 meters per meter, the fastest drilling time only five or six minutes, speed effect significantly.
The successful application of technology, will provide strong technical support for the future of the region and Songnan deep and fast exploration.
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