METHOD OF STUCK RELEASING AND LIFTING OF DRILL AND CASING STRINGS WHEN DRILLING AND REPAIRING WELLS
V. I. Sklyanov
Norilsk State Industrial Institute, Norilsk, Russia
Keywords: Устройство для развинчивания труб в скважине, ликвидация аварии, рабочая бурильная колонна, синусошариковая передача, тормозной механизм, заякоривающие башмаки, Pipe unscrewing device, emergency elimination, working drill string, sinus-ball transmission, braking mechanism, anchor shoes
Abstract
The method for extracting stuck pipes from a well using a special pipe unscrewing device (PUD) in drilling deep wells and overhaul is described. The main operational technical parameters of PUD are studied. To transmit the required torque, the PUD design provides a sinus-ball reversible gearbox with a braked carrier and multi-row gearing. The prototype of the developed PUD has been successfully tested under production conditions. The test results enabled to correct working technical documentation and prepare the guidelines for the implementation of the method of removing the emergency string.
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