BOTTOM HOLE ASSEMBLY WEAR AS A CRITERION FOR DESIGN MODIFICATION
Burimov, Yury G. — Technology сonsultant, LLC IDS Drilling, e-mail: firstname.lastname@example.org
Key words: BHA wear, BHA catching, effective hole diameter, ledges, bit sub, pin size range for drill bits, drill bit shank, bottomhole motor, multi-blade centering device, drill bit stabilizer, «RSS».
It is recommended that wear of BHA elements should be considered a criterion for the assessment of efficiency and a need for modification of design of roller cutter bits, drag bits, pilot reamers, bottomhole motors, centering devices, and other BHA elements in order to improve drilling performance. As to the wellbore quality, effective diameter should be used as a criterion for the assessment of wellbore configuration required for successful casing running. Recommendations are provided for the amendment of standards for drill bits, bottomhole motors, centering devices and other regulatory documents in order to improve the technology of well drilling.