Pressure loss identifying apparatus and method for a drilling mu
Pressure measurement system
Pressure monitoring technique for downhole tools
Pressure sensor system
Pressure sensor system
Pressure transient method of rapidly determining permeability, t
Pressure-transient testing while drilling
Preventing buckling in drill string
Probe to specifically determine the injectivity or productivity
Probing device for investigation of the earth
Procedure and cell for measuring coefficients of adhesion and fr
Procedure for measuring the rate of penetration of a drill bit
Procedure in order to detect the gas potential in sedimentary ba
Process and apparatus for analyzing cutting from oil and gas wel
Process and apparatus for analyzing cuttings from oil and gas we
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