LAYOUT bottom of the drill string ENHANCED DYNAMIC WOB

摘要

The invention relates to oil and gas industry, namely, to the field of well drilling and can be used in the preparation of the bottom hole assembly (BHA) for drilling deviated and horizontal wells.; The aim - increase the effectiveness of oil drilling, particularly directional or horizontal, by increasing the dynamic component of the axial load on the bit.; The goal is achieved BHA with enhanced dynamic load on the bit.; BHA with enhanced dynamic load on the drill bit comprises a drill pipe, drill bit, a screw downhole motor (PDM) and the telesystem.; New is that the arrangement further comprises a downhole above-bit oscillator [RF patent №96160 E 21 B 7/00 "downhole oscillator"] comprising a housing, a calibrated bushing mounted in the housing, a valve axis, the diffuser upper and lower diffuser. Above-bit downhole oscillator between chisel and lined with PDM and configured to amplify the dynamic component of the axial load on the drill bit to a more efficient rock breaking.; It becomes possible to achieve a greater distance from the vertical line with a reduction in reciprocation needs shablonirovki trunk and "explosions" layout in order to bring the load to the slaughter.; Thus, the use of Near Bit downhole oscillator allows efficient use of the BHA together with PDC bits in quite difficult conditions, increasing the mechanical speed directional drilling and dynamic WOB, reducing the number of breakages downhole tool, the tool excluding podvisanie improving controllability BHA.