To boost drillstring life, hardbanding reapplication specs could be more critical than initial specs

摘要

AS THE DRILLING industry evolves to accommodate the challenges of deep-well and horizontal drilling techniques, increasing demand is being placed on the maintenance of drillstrings, particularly the tool joints. As recently as 15 years ago, tool joints were adequately protected by tungsten carbide hardbanding. Because of the limited use of casing while drilling, casing wear was not an issue. As wellbores became deeper and more deviated, however, more casing strings were used, thus becoming a serious target for wear by the tungsten carbide hardbanding.