stag - stop
- stage
- stage amplifier
- stage cementing collar
- stage hoist
- stage planking
- stage pump
- stage rope
- stage-plunger pump
- stagger-tuned discriminator
- staggered joints
- staggered pattern
- staggered piling
- stainless steel spike
- stake-line
- staking pin
- stall gate
- stamp shoe
- stamp[ing] hammer
- stand-up formation
- standard
- standard (normal electrode) electrode
- standard 6 deviation
- standard API unit
- standard calomel electrode
- standard curve
- standard duty
- standard dynamite
- standard electrolyte
- standard ellipsoid
- standard error deviation
- standard gauge
- standard gelatin(e)
- standard geophone
- standard height
- standard hydrogen electrode
- standard instrumentation
- standard laboratory
- standard lateral
- standard laterolog
- standard line
