Engineering Live Dashboard

Volume Conversions

Litres, US Gallons, Barrels

Convert between Volume Units.

Temperature Conversions

Fahrenheit (°F), Celsius (°C), Kelvin (K), Rankine (°R)

Convert between Temperature Units.

Length Conversions

Inches (in), Feet (ft), Yards (yd), Miles (mi), Millimeters (mm), Centimeters (cm), Meters (m), Kilometers (km)

Convert between Length Units.

Rates Conversions

bbl/day, bbl/min, gall/min (US), m³/day, m³/min, ltr/min

Convert between Rates Units.

Density Conversions

°API, S.G. , ppg (lb/gal) , lb/ft³ , g/cc (kg/L) , psi/ft (Grad) , bar/m

Convert between Density Units.

Hydrostatic Pressure Calculator

$$P_{hyd} = TVD \times (SG \times 0.4333)$$

Calculate bottom-hole pressure based on fluid density and depth.

Gas Flow Rate Estimation

$$Q = \frac{C \cdot P_{up}}{\sqrt{T \cdot G}}$$

Estimation through a fixed choke when Critical Flow exists (Downstream P < 0.5 × Upstream P)..

Oil Flow Rate Estimation

$$Q_o = \frac{(P + 14.73) \times C^2}{17.4 \times G^{0.5}}$$ $$Q_o = \frac{P \times C^{1.89}}{435 \times (\frac{G}{1000})^{0.546}}$$

Estimation using Gilbert and Ros multi-phase flow equations.

Choke Nipple Gas Rate Calculation

$$Q_{mscfd} = \frac{Coefficient \times P_{abs}}{\sqrt{G \times T_{abs}}}$$

Critical flow calculation for gas wells based on choke size and upstream conditions.

Solution GOR2 Estimation ($R_s$)

$$R_s = \gamma_g \left[ \frac{P}{18 \cdot 10^{yg}} \right]^{1.204}$$ $$R_s = C_1 \gamma_g P^{C_2} \exp\left[ \frac{C_3 API}{T_{abs}} \right]$$

Estimating gas solubility using Standing and Vasquez & Beggs correlations.

Estimate of Shrinkage Factor

$$B_o = 0.9759 + 12 \times 10^{-5} \cdot (F_{vol})^{1.2}$$ $$\text{Shrinkage} = \frac{1}{B_o}$$

Estimate of Shrinkage Factor.

Desander Velocity & Pressure

$$V_{flow} = \frac{32000 \times q_g}{16 \times P_{whp}}$$ $$P_{kPa} = P_{psia} \times 6.89476$$

Velocity & Conversion Formulas.

Recommended Flange Bolt Torque

$$A_s = \frac{\pi}{4} [D - (0.9743 \times P)]^2$$ $$T = \frac{F \cdot E \left( P + \pi f E S \right)}{2 \left( \pi E - P f S \right)} + F f \left( \frac{H + D + K}{4} \right)$$

Calculate required torque based on stud diameter, pitch, and desired bolt stress.

Flow Meter Performance

$$Freq (Hz) = \frac{GPM \times Factor}{60}$$

Flow Meter Performance.

Wire Cable Length (Tie Back)

$$c = \sqrt{a^2 + b^2 - 2ab \cos(C)}$$

Wire Cable Length (Tie Back).

Mud Pump Performance

$$Pump \ Output \ (bbl/stk) = 0.000243 \times D^2 \times L \times Eff$$

Mud Pump Performance.

Shrinkage Factor estimation (@ 60°F)

$$Q_{net} = Q_{gross} \times (1 - BS\&W) \times Shrk$$

Calculated via Katz Chart Linear Interpolation [Source: Halliburton].

Refractometer Analysis

$$[NaCl]_{mg/L} = \text{Reading}\% \times 10,000$$ $$Cl^-_{ppm} = \frac{[NaCl]_{mg/L}}{1.84}$$

Refractometer Analysis.

Bubble Point for Oil

$$P_b = [ \frac{R_s}{C_1 \cdot \gamma_{gc} \cdot e^{ (\frac{C_3 \cdot API}{T_{res} + 460}) }} ]^{1/C_2}$$

Vasquez-Beggs Correlation.

Gas Estimate for Aramco Khuff Wells

$$Q = \frac{\left(\frac{D}{64}\right)^{2.0871} \cdot 26.616 \cdot 18 \cdot (P + 14.73)}{\sqrt{SG \cdot (T + 460)}} \cdot \frac{WF}{1000}$$

Empirical Flow Equation.

Estimated Flow Returns (Tank Readings)

$$Rate_{(bpd)} = \frac{\Delta V}{\Delta t_{min}} \times 1440$$

Estimated Flow Returns (Tank Readings)

Bottoms Up Time Estimation

$$T_{min} = \frac{V_{tubing}}{q_{bpm}}$$

Lag Time Calculation

Synflex Swaged Couplings

$$Part_{Selection} = f(\text{Series Type}, \text{Hose I.D.})$$

Synflex Swaged Couplings

Choke Flow Rate Estimation

$$Q_g = \frac{(C/64)^{2.0871} \cdot 479.088 \cdot P}{\sqrt{0.6 \cdot (T + 460)}}$$ $$Q_o = \frac{P \cdot C^{1.89}}{435 \cdot (R/1000)^{0.546}}$$

Choke Flow Rate Estimation

Tank Volume & Loading Estimator

$$Load_{lb/ft^2} = \frac{W_{total} \times 2240}{(L \times W) / 144}$$ $$V_{total} = \frac{\pi \times r^2 \times L}{5.61458}$$

Tank Volume & Loading Estimator

Flow Rate Conversions

$$1 \text{ ft}^3 = 7.4805 \text{ gal} = 28.317 \text{ L}$$ $$1 \text{ bbl} = 42 \text{ gal} = 5.6146 \text{ ft}^3$$

Convert between common field units for liquid and gas flow rates.

Choke Size Conversion

$$ID_{inch} = \frac{\text{Choke Size}}{64}$$ $$ID_{mm} = ID_{inch} \times 25.4$$

Convert among Choke Size (1/64") & Decimal Equivalent (ins) & Metric Equivalent (mm)

Cable Sizing & Voltage Drop

$$\%V_{drop} = \left( \frac{V_{drop}}{V_{sys}} \right) \times 100$$

Cable Sizing & Voltage Drop

Oil Gravity Temperature Correction

$$SG_{60} = SG_{obs} + \Delta SG_t$$ $$API_{60} = \frac{141.5}{SG_{60}} - 131.5$$

Convert observed Specific Gravity and API to standard conditions (60°F).

Pipe ID & Wall Thickness

$$ID = OD - (2 \times t_{wall})$$

Reference data for Nominal Pipe Size (NPS) and Schedule.

Liquid Meter Operating Ranges

$$Q_{BPD} = Q_{GPM} \times 34.2857$$

Liquid Meter Operating Ranges.

Full ANSI & API Flange Database

Components are selected based on Rating and NPS to ensure pressure integrity

3 Phase Electrical Calculations

$$I_{FLC} = \frac{P_{kW} \times 1000}{\sqrt{3} \times V \times PF}$$ $$I_{startup} \approx I_{FLC} \times 7$$

3 Phase Electrical Calculations.

Pressure Drop for Strainers

$$V = \frac{Q_{GPM} \times 0.4085}{ID_{line}^2}$$ $$\Delta P_{body} = \frac{V^2 \times SG}{148.1} \times K_{tot}$$ $$\Delta P_{total} = \Delta P_{basket} + \Delta P_{body}$$

Pressure Drop for Strainers.

Dry Gas Flow thru Positive Choke

$$Q_{sc} = \frac{C \cdot A \cdot P_{up}}{\sqrt{G \cdot T}}$$

Dry Gas Flow thru Positive Choke.

General Well Testing Calculations

Gas Velocity & Volume (1 & 2) & Twin Choke Factor & OIL VOLUME & CORRECTED S.G. @ 60°F & S.G. & API Conversions & Shrinkage Factor

General Well Testing Calculations.

Pipe Wall Thickness Calculator

$$t_m = \frac{P \cdot D}{2(S \cdot E + P \cdot Y)} + C.A.$$

Pipe Wall Thickness Calculator.

Advanced Well Test Calculator

$$Q_o = V_{net} \times \left( \frac{1440}{Interval} \right) \times C_{tl}$$ $$Q_g = C' \sqrt{P_f \times h_w}$$

Advanced Well Test Calculator.

Transducer Signal Scaling

$$Reading = \frac{(V_{raw} - V_{zero}) \times Range}{V_{max} - V_{zero}}$$

Transducer Signal Scaling.

conversion

Unit Prefix Converter

(Unit Prefix Converter)

(Unit Prefix Converter).

Pressure Drop Straightening Vanes

Calculate pressure losses across different pipe sizes and flow types.

Pressure Drop: Straightening Vanes

Advanced Meter Factor Calibration

$$K_{tank} = 1 - [(0.066 \cdot API + 2.75) \cdot (T_{tank} - 60) \cdot 10^{-4}]$$ $$K_{meter} = 1 - [(0.066 \cdot TF + 2.75) \cdot (T_{meter} - 60) \cdot 10^{-4}]$$

Advanced Meter Factor Calibration

Well Test Chemicals Dosage

$$Rate_{(cc/min)} = \frac{Q_{(bpd)} \times Dosage_{(ppm)} \times 42 \times 3785.41}{1,000,000 \times 1440}$$

Calculate injection rates based on production flowrate and required dosage.

Retention Time Calculator

$$t_{(min)} = \frac{V_{bbls} \times L_{\%}}{Q_{(bpd)}} \times 1440$$

Estimated retention time in separator based on volume and flow.

Horizontal Vessel Sizing & Gas Capacity Check

$$L = \frac{Q_{(bpd)} \times t_{(min)}}{1440 \times A_{liquid}}$$ $$V_{max} = K \sqrt{\frac{\rho_L - \rho_g}{\rho_g}}$$

Determine required vessel dimensions for a target retention time.

Halliburton Turbine Meter Calibration

$$K_{bbl} = K_{gal} \times 42$$ $$Disp_{top} = \frac{K_{bbl}}{100}$$ $$Factor = \frac{86,400}{K_{bbl}}$$

Calculate pulses per barrel and display values for MCII Analyzers.

Quick Gas Rate Estimation

$$q_g = \frac{(C \cdot P_{wh} + P_{atm})}{\sqrt{\gamma_g \cdot (T_{wh} + T_{abs})}} \cdot 10^{-3}$$

Estimation of dry gas rate through a choke using pressure and temperature.

Pressure Drop & Velocity Analysis

$$V_1 = \frac{32,000 \times Q}{D^2 \times P_1}$$ $$V_2 = \sqrt{2 \times (P_1 - P_2)}$$

Based on Bernoulli's Principle. Safe limit: 80 ft/sec.

Chloride Determination (Argentometric)

$$mg/L \text{ Cl}^- = \frac{(A-B) \times N \times 35450}{D}$$ $$NaCl = Cl^- \times 1.65$$ $$TDS \approx NaCl \times 1.15$$

Chloride Concentration & Sodium Chloride (NaCl) & Estimated TDS

Effective Area of Twin Chokes

$$Combined = \sqrt{D_1^2 + D_2^2}$$

Effective Area of Twin Chokes.

Choke Calibration (Erosion Check)

$$D_{eff} = 128 \times \sqrt{\frac{Q_{mscf/d} \times \sqrt{T_R \times \gamma_g \times Z}}{\pi \times C \times P_{psia} \times C_d}}$$

Choke Calibration (Erosion Check)

Symbols

All Symbols with units and equations

Well Testing Symbols Library.

Gas Rates by Choke Coefficient

$$mscf/d = \frac{C \cdot A \cdot P_1 \cdot C_d}{\sqrt{T \cdot \gamma_g \cdot Z}}$$

Gas Rates by Choke Coefficient.

Downhole Pressure Calculators

$$q_g = \frac{C \cdot A \cdot P_1 \cdot C_d}{\sqrt{T \cdot \gamma_g \cdot Z}}$$ $$P_{ws} = P_{wh} \cdot e^{\left( \frac{0.01875 \cdot \gamma_g \cdot H}{Z \cdot T} \right)}$$

Gas Downhole Pressure & Fluid Hydrostatic (ppg) & (pcf) Fluid Density Converter.

API Gravity Correction (to 60°F)

$$API_{60} = \left( \frac{141.5}{SG_{obs} / VCF} \right) - 131.5$$

Standardized by ASTM D1250/1980

Pressure Vessel Wall Thickness (ASME)

$$t = \frac{PR}{SE - 0.6P} + C.A.$$ $$t = \frac{PD}{2SE - 0.2P} + C.A.$$

SHELL: Minimum Thickness & 2:1 ELLIPTICAL HEAD.

Gas Gradient & Static BHP

$$G = \frac{0.01875 \cdot \gamma_g \cdot P_{wh}}{Z_{avg} \cdot T_{avg}}$$ $$P_{ws} = P_{wh} + 0.25 \left(\frac{P_{wh}}{100}\right) \left(\frac{D}{100}\right)$$

calculate the Static Bottom Hole Pressure (Pws) and the initial Gas Gradient.