slip type elevatorslipsslop tankslotted linerslow setting cementsludge pumpsmoothing off of a curvesnubbingsnubbing equipmentsocket hornsodium bicarbonatesodium carbonatesodium carboxymethylcellulosesodium chloridesodium chromatesodium dichromatesodium montmorillonitesodium pentachlorophenatesodium polyacrylatesodium pyrophosphatesoft formationsoft formation cutting headsoft rocksofteing agentsoftenning factorsoil mechanicssoil samplersoil samplingsolar oilsolubilitysolubility curvesolubility factorsoluble oil reservoirsoluble rocksolvent extractionsondesonde coefficientsonde half spacingsonde spacingsonic drillingsorption of a gassounding devicesoundproof drillingsour crudesour natural gassour wellsp amplitudesp coefficientsp gradientspar buoy mooring system
