STAGES OF DEVELOPMENT OF IMS BITS CONSTRUCTION FOR DRILLING OIL AND GAS WELLS
Abstract
The stages of development and industrial testing of drill bits reinforced with superhard composite diamond-bearing material (SCDM) "Slavutich" are presented. A rotary drilling bit with hard-alloy sliding bearings and options for bits with a sealed bearing have been developed. Drilling at the well. A chisel ISM-188 MS with an all-milled body was developed and an rationalization proposal was received with a changed layout of rock-cutting inserts from SCDM. Two insertion layouts were constructed and analyzed in relation to the overlap ratio for soft and medium rocks. The schemes were compared with respect to the relation in the cutting line of inserts from SCDM according to the sum of their diamond content in the part ΣLа to the length to the entire cutting line ΣLr. The number of occupied area of rock cutting inserts to the total cutting area of the body for ISM bits was Ko=0.1 ÷ 0.68. Tests were carried out with ISM-132/52s core bits for drilling the Kola well SG-3 in hard rocks. When drilling hard rocks, a bit ISM-214.3t was developed with maximum equipment with SCDM inserts, which was used in cluster drilling in the Tyumen region. The ISM has developed drilling heads, cutting bits, milling cutters, and reamers. For drilling hard formations and increasing efficiency, bits with PDC and PDC with CVD diamond (SU-CVD diamond) have been developed, which have a higher hardness.
