BOTTOM COLLAR CENTRALIZER-BALANCER FOR PERFORMING DRILLING OPERATION WITH THE USE OF DOWNHOLE MOTOR

摘要

FIELD: oil and gas industry, particularly for drilling oil and gas wells and for equipping boring tools with centralizers, balancers and similar means.;SUBSTANCE: centralizer includes tubular body with connection thread and with centering members having longitudinal slots. Length of centering member defined by working surface measured in vertical direction is chosen in accordance with centering member diameter and boring head diameter and is characterized by the following criterion: L_ц≤ 25ч35(d_д-d_ц), where L_c is length of working centrator surface in vertical direction, mm; d_b is boring head diameter, mm; d_c is centering member diameter, mm.;EFFECT: increased efficiency of drilling process, reduced time consumption for well securing.;1 tbl, 3 dwg