Double interpolation anti-skew compensation of sampled analog da
Double-ended distance-to-fault location system using...
Down hole and above ground data loggers
Downhole fluid analysis
Downhole library of master wavelets for VSP-while-drilling...
Downhole monitoring method and device
Downhole process control method utilizing seismic communication
Downhole PV tests for bubble point pressure
Downhole rate of penetration sensor assembly and method
Downhole referencing techniques in borehole surveying
Downhole tool controller using autocorrelation of command...
Downhole tool data correction method and apparatus
Downlink based on pump noise
Dozing system for bulldozer
Drawing apparatus and method of attaching balance weights
Drawing apparatus and method of attaching balance weights
Drift compensation method for fingerprint spectra
Drill bit performance analysis tool
Drilling performance assessment process
Drilling rig closed loop controls