Process and apparatus for calculation of the instantaneous speed
Process and device for the determination of the characteristics
Process and device for the determination of the characteristics
Process and equipment for determining the density of a loaded dr
Process for controlling a drilling operation
Process for determining the location and/or extent of rock cavit
Process for measuring flow and determining the parameters of mul
Process for measuring the formation water pressure within an oil
Process for rapidly determining the solids content in drilling f
Process for the chemical logging of a liquid and chemical loggin
Pulsed ultrasonic doppler borehole fluid measuring apparatus
Pump differential pressure monitor system
Pump-off monitor for rod pump wells
Push drill guidance indication apparatus
Push-off pistons
Quantitative clay typing and lithological evaluation of subsurfa
Quantitative determination by elemental logging of subsurface fo
Quantitative determination by elemental logging of subsurface fo
Rate of penetration recorder
Rate of penetration sensor for oil drilling rigs