- tridecane
- trifluoroethylene
- trigger bit
- trihydroxyflavanone
- trillings
- trimethylene
- triol
- triphane
- triphylite
- triple purpose
- tristetrahedron
- trisubstituted
- tropaeolin
- trouble-proof
- trudellite
- true emulsion
- true liquid
- true resin
- trisistor
- triturating
- truck mixer
- true ruby
- true solution
- true strain
- truncated
- truscottite
- truxillic
- truxilline
- tryptic
- tscheffkinite
- tsingtanite
- tube bundle
- tube extractor
- tube fittings
- tube still
- tube turn
- tubercular texture
- tubing board
- tubing catcher
- tubing packer
- tubing spider
- tuboscope
- tubular heater
- tubular quartic
- tubular texture
- tufa
- tulipwood
- tumble
- tumble plant
- tumbling barrel
- tung oil
- tungsten carbide
- turbidimetry
- turbidity point
- turbine drilling
- turbine oil
- turbo blower
- turbodrill
- turbodrilling
- turbor drilling
- turbor-supercharger
- turmeric
- turn off
- turnkey drilling
- turnover job
- turnover number
- turpentine substitute
- tutwork
- tuyere
- twaddell hydrometer
- twin boundary
- typewriter oil
- typhoon
- typomorphic mineral
- tyre tread
- tyrolite
- tyrrhenian stage
- U-bar
- U-iron
- ullage measurement
- ulmin
- ulsterian stage
- ultimate composition
- ultimate load
- ultimate magnification
- ultrabasic
- ultrafiltrate
- ultrasonics
- un-crystalline
- un-reacted
- un-roasted
- un-serviceable
- un-sized
- un-watering
- un-weighted
- unacted
- unbedded
- unbroken
- uncased hole
- uncased well