elevation of the well headelevation plantelevatorelevator linkembeddedemergency flareemulsificationemulsification testemulsifier emulsifying agentemulsifyemulsion mudencroachmentencroachment areaencroachment area of the edge waterend drillend flangeenriched gas driveenthaply heat contententrapmententrapped gas occluded gaseoceneepicontinental seaepoxy type coatingequipotential surfaceequity crudeerect anticlineescapeescape of volatile compoundsestimating of reserves estimation of reserveseudiometerevening shift evening tourexcelsior tank filter tank hay tankexcessive heatexcessive pressureexhaust fanexhaust manifoldexhaust pipeexpanding anchorexpansion bitexpansion capacityexpansion jointexpansion of gas gas evolution gas expansionexpansion ringexpansion tankexploitable reserves recoverable reservesexplosion proof equipmentexplosion seamexternal pipe cutterexternal upsetexternal upset drill pipe
