logging recorderlogging unitlogging welllong lateral devicelong normal sondelong thread casinglong threadslongitudinal faultlongitudinal profilelooploop oscillographloose couplingloss of circulationloss of circulation zoneloss of circulation zone locationlost circulation alarmlost circulation detectorlost holelost oillow angle faultlow resistivity bedlow solid content mudlow water losslower cretaceouslower jurassiclower permianlower triassiclower v the drill pipeslowering of the casinglubricating ringlubrication pipe