Chudyk I. Improvement of designing technique of the bottom of non-drilling pipe assembly

The non - directional assemblies of drilling string bottom. To increase of efficiency of hole drilling by improvement of designing technique of the non - directional assemblies of drilling string bottom. Methods of theory of resiliency, of mathematical design, of programing and statistics and experimental laboratory and industrial researches. There has been researched the influence on the static characteristics of drill bit and baking - center elements interaction with a hollow and with the hole walls of small length areas and different cases of center elements interaction with the hole walls. There has been developed the designing recommendations of the non - directional assemblies of drilling string bottom. The field of the use is the hole drilling.