DEVELOPMENT OF PROCESS AND IMPROVEMENT OF SYSTEMS FAILING TO RUN TRUE FOR DRILLING OF SECOND SHAFTS OF WELLS BY BOTTOM ENGINES

There the problem about the correction of heavy emergenicies by the cutting and by the drilling of second shaft in the non-cased wells. The purpose is to develop the new technical-and-production approaches for the rise of quality of drilling process of second shaft at the great depthes and in the hard rocks. The design method of profile of second shafts, which was based on the relationship of milling speed of shaft, which was based on the relationship of milling speed of shaft wall and of failure speed of bottom as well as the method, which was based on the keeping of constant of forse failing to run true on the bit during the formation process of new shaft have been offered. The drilling manner of second shaft without the pre-working of bench, the cutting bit have been developed. The improved cutting bit the drilling of second shafts has been introduced. The preliminary tests of cutting bit give the positive results. The application field is the drilling of second shafts at the correction of emergencies in the deep wellsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio