Will eliminate excessive regrinding of drilled.However, when the circulation rate increases, so.Both these items increase when the circulation.Under what conditions do we get the best.The onset of turbulence in pipe flow isĬharacterized by the dimensionless group known as.Laminar and turbulent flow patterns inĪ circular pipe (a) laminar flow, (b) transitionīetween laminar and turbulent flow and (c) Thin laminar boundary layer at the wallįig.Is the usual flow type inside the drill pipe and.Mud properties have little effect on pressure.Results in higher pressure losses (takes.Flow pattern is random (flow in all directions).As the flow velocity increases, the flow type.Laminar flow is sometimes referred to as sheet.Is preferred flow type for annulus (in vertical.Mud properties strongly affect pressure losses.Flow pattern is linear (no radial flow).

Hydrostatic pressure difference (r varies).Pressure loss in the annulus between the drill.Summary of Laminar Flow Equations for Pipes andįig 4.33 Critical Reynolds number for Binghamįig 4.34 Fraction Factors for Power-law fluid Velocity profiles for laminar flowģD View of Laminar Flow in a pipe - Newtonian K consistency index n flow behavior indexįig. We shall use power-law model(s) to calculate.T and ty are often expressed in lbf/100 sq.ft Force reqd to move upper plate at 10 cm/s.Viscosity may be expressed in poise or centipoise.Viscosity of the fluid and is independent of The constant of proportionality, is the.Proportional to the shear rate (in laminar flow) In a Newtonian fluid the shear stress is directly.HHP of pump putting out 400 gpm at 3,000 psi ?.This follows since Dp is the same across.Vn is the same for each nozzle even if the.This accounts for all the losses in the nozzle. Pressure at bottom of drill collars 7,833 psig States that as a fluid flows from point 1 toĭetermine the pressure at the bottom of the drill.

d1 external diameter of inner pipe, in.

Weight of Pipe Contents: Computes the weight (mass) based on density and pipe dimensions.

Volume of a Pipe: Computes the volume of a pipe.

Mud Buoyancy: Computes the buoyancy in mud.

Quintuplex Pump Output: Barrels per stroke from a quintuplex pump.

Triplex Pump Output: Barrels per stroke from a triplex pump.

Duplex Pump Output: Barrels per stroke from a duplex pump.

Annular Velocity: Compute the fluid flow velocity, based on the flow rate and pipe dimensions.

Barrel Production: Computes the total volume (barrels) produced over a period of time based on the production rate and duration.

The formula for the Annular Velocity is : meters per second) via the pull-down menu. However, this can be automatically converted to other velocity units (e.g.

( Dp) Outer diameter of the drill pipe.Īnnular Velocity (AV): The calculator returns the fluid velocity in feet per minute.

( Dh) Size of the hole, the inner diameter.

( Q) Pump output which is the flow rate of the pump.

INSTRUCTIONS: Choose units and enter the following: The Annular Velocity calculator computes the speed of a fluid's movement in an annulus while pumping based on the pump output ( PO), the inner diameter of the pipe ( ID), and the outer diameters of the drill pipe ( OD)

Drilling hydraulics annular reynolds