weight on bit การใช้

• The weight on bit allows you to tune that tendency.
• Weight on bit, the force exerted on the cutting face of the bit by the drill rods in the hole above the bit, must also be monitored.
• Weight on bit is provided by drill collars, which are thick-walled tubular pieces machined from solid bars of steel, usually plain carbon steel but sometimes of nonmagnetic nickel-copper alloy or other nonmagnetic premium alloys.
• The parameters used to calculate "'d c-exponent "'values are : drilling rate ( ROP ), rotary speed, weight on bit, bit diameter and mud weight; it is plotted against drilled depth.
• Other constraints are dictated by its intended use : formation type ( hardness, plasticity, abrasiveness ) to be drilled, operating environment at depth ( temperature, pressure, corrosiveness ), the capabilities of the equipment used in the operation ( rotating speed, available weight on bit, pump horsepower ) and the angle of the wellbore ( vertical, directional, horizontal ).
• The total gas, chromatograph record, lithological sample, pore pressure, shale density, D-exponent, etc . ( all lagged parameters because they are circulated up to the surface from the bit ) are plotted along with surface parameters such as rate of penetration ( ROP ), Weight On Bit ( WOB ), rotation per minute etc . on the mudlog which serve as a tool for the mudlogger, drilling engineers, mud engineers, and other service personnel charged with drilling and producing the well.