surface holesurface soilsurface structuresurfactantsurfactant mudsuspended and capable wellsuspended solidssuspensionsuspension ringswabswab v inswabbing cupswabbing effectswabbing lineswabbing productionswabbing testswabbing wellswamp drillingsweet crudesweet natural gasswelling claysswelling curveswelling indexswelling pressureswing pipeswivelswivel bailswivel bsaringswivel hookswivel stemsymmetrical anticlinesymmetrical sondesynclinal faultsynclinal limbsynclinesyncline watersynclinsl bend
