... of the most important drilling parameters is assessed. The parameters are the drilling rate, the air pressures and the effect of work powers of different drills. The effect of the different drill work powers on the drilling data is identified. So, only the rock dependant variation can be left for site...

... geometries and relative strength of subsurface profiles in depth along the hole. real time system Reservoir Characterization drilling operation Upstream Oil & Gas Engineering drilling rate hydraulic rotary drilling drilling process site characterization automatic monitoring drilling...

... for accurate prediction of drill performance. The average field drilling rate of a rock is related to the power input in terms of operating pressure, the RIHN and the shore hardness of fresh pieces of the rock collected from the quarry face. An empirical equation is proposed and shown to be adequate...

... will also be reduced. This therefore, is an unsatisfactory solution and another method must be sought. There has been considerable interest in recent years in drilling holes less than 1 in diameter. Reservoir Characterization bit selection structural geology Upstream Oil & Gas drilling rate...

... and designing rock-cutting tools. However, the drilling, breaking, and/or cutting rocks are not affected only by any one of these rock properties, but by the multiple effects of all these properties. EXPERIMENTALSPart I. Drilling Rate Study For the investigation of the drilling rate vs. s t / s c, one-inch...

... strength, and the pressure profile may be approximated as a step function over a diameter that is of the order of 1.7 nozzle diameters. By an approximate extrapolation of the experimental results, it is demonstrated that the drilling rate with a pulsed water jet is at least comparable to that achieved...

..., are expressed (mathematical Equation)(Available in full paper) where s 1 , s 2 , and s 3 are the three principal stresses. These stresses have been used to describe the state of stress in solid materials. Reservoir Characterization reservoir geomechanics Upstream Oil & Gas drilling rate pore...

... and their limitations and areas of application are discussed. Drilling rate relationships are developed and related to the basic rock failure mechanisms. TYPES OF MECHANICAL DRILLS There are three basic methods of mechanically attacking rock: 1) percussive action,2 ) rotary action, and 3) combined rotary-percussive...