How do you calculate hydraulic bits?
Drill Bit Hydraulic Horsepower & Impact Force Calculation It is commonly calculated with the equation HHP=P*Q/1714, where P stands for pressure drop in pounds per square in., Q stands for flow rate in gallons per minute, and 1714 is a conversion factor necessary to yield HHP in terms of horsepower.
What is bit hydraulic?
Bit hydraulics is related to the effects of nozzle sizes, number of nozzles, the jet velocity of drilling fluid passing through the bit nozzle, and the pressure loss across the bit. Optimized hydraulics reduces the overall drilling cost.
What is hydraulic horse power?
gpm x psi / 1715 = hydraulic horsepower. is the horsepower equivalent of “lifting” a continuous volume rate of fluid to the height in ft represented by the pressure involved (as if a tall, open overflowing stand-pipe were connected to measure the pressure).
What is bit jet impact force?
the bit jet impact force is a maximum when the pressure drop at the bit is m m + 2 times the pump pressure.
What is bit HSI?
Abstract. Historically, parameters like junk slot area (JSA), face volume (FV) and hydraulic horsepower per square inch of bit area (HSI) have been used to empirically predict the balling performance of drill bits. These performance gauges, however, generally produce inconsistent results.
How do you calculate hydraulic horsepower?
It is commonly calculated with the equation HHP=P*Q/1714, where P stands for pressure in pounds per square in., Q stands for flow rate in gallons per minute, and 1714 is a conversion factor necessary to yield HHP in terms of horsepower.
What is BHP in pump?
Brake horsepower (BHP) represents the rate at which energy is added to the fluid. It is calculated by (TDH x gpm x SG)/ (3960 x pump %). Let’s use the example of 175 gpm at a TDH of 70. The SG of the fluid being pumped is 0.95 and the efficiency from the manufacturer’s pump curve is 68 percent.
What is HSI in drilling?
HSI is the hydraulic horsepower per square inch at the hole bottom.
What is hydraulic optimization?
The concept of Hydraulic Optimization is based on the best condition to clean the well is when the force provided by the jets is the maximum. If you drill a shallow hole section, the maximum impact force is recommended.
What bit bailing?
Balling occurs when clay based drilled solids adhere together and cling to the metal surfaces of the bit and pipe. Bit balling usually occurs while drilling shale. Clay adhesion is a function of the electrochemical attraction of clay to clay solids and clay to metal (surface tension).
What is the formula for jet reaction?
R = ρ Q 2 / A2 , where A2 is the discharge diameter, Q is the volumetric flow rate, R is the magnitude of the nozzle reaction, and r is the water density. This equation shows that the reaction is proportional to the flow rate squared, divided by the nozzle diameter.
How do I optimise bit hydraulics on a well?
Example: Optimise bit hydraulics on a well with the following: Select the proper jet sizes for impact force and hydraulic horsepower for two jets and three jets: DATA: Mud weight = 13.0 ppg Maximum surface pressure = 3000 psi Pump rate 1 = 420 gpm Pump pressure 1 = 3000 psi Pump rate 2 = 275 gpm Pump pressure 2 = 1300 psi
What is the formula for hydraulic power?
Basic Hydraulic Formulas 1 Pressure, Force and Horsepower Relationships: 2 Torque and Horsepower Relationships: Piston Cylinder Area (in²) = diameter squared x .7854 Motor Torque (in lbs) = pressure (psi) x motor displacement (cu ins/rev) / 6.28 3 General Information and “Rules of Thumb” 4 Commonly Used Fluid Power Equivalents.
What is bit hydraulic energy (HB)?
Bit hydraulic energy, Hb, is the energy needed to counteract frictional energy (loss) at the bit or can be expressed as the energy expended at the bit: See prior equation for metric conversion.
How do you calculate jet size for hydraulic impact?
These series of formulas will determine the correct jet sizes when optimising for jet impact or hydraulic horsepower and optimum flow rate for two or three nozzles. 1. Nozzle area, sq in.: Nozzle area, sq in. = N12 + N22 + N32 2.