**Update**… I add **all drilling formulas together** into one file which allows me to update it and share with you all easily. Please find the drilling formula calculation sheet.

**Download>>>****Drilling Formula Calculation Sheet**

This is version no.1 which was distributed on 28-Mar-11.

You can read all detail of this file via this link **https://www.drillingformulas.com/drilling-formula-calculation-sheet/**

Please feel free to give me feedback.

**Ps. The following formulas are in this calculation sheet.**

Accumulator Capacity – Usable Volume per Bottle Calculation (Surface Stack)

Accumulator Capacity – Usable Volume per Bottle Calculation for Subsea BOP

Adjusted maximum allowable shut-in casing pressure

Amount of cuttings produced per foot of hole and total solid generated

Angle Averaging Method in Directional Drilling Calculation

Annular Velocity (AV) Calculation

Balanced Tangential Method Calculation

Barrels of slug required for desired length of dry pipe

Bulk Density of Cuttings by Using Mud Balance

Calculate Annular Pressure Loss

Calculate Equivalent Circulation Density (ECD) with complex engineering equations

Calculate inner capacity of open hole/inside cylindrical objects

Calculate Oil-Water ratio from retort data

Calculate Pressure Gradient and Convert Pressure Gradient

Calculate Specific Gravity (SG) in oilfield unit

Convert Pressure into Equivalent Mud Weight

Convert specific gravity to mud weight (ppg and lb/ft3) and pressure gradient (psi/ft)

Correctedd D Exponent Calculation

Critical RPM to Avoid Excessive Vibration

Determine height of light weight spot pill to balance formation pressure

Determine the actual gas migration rate

Determine the density of oil and water mixture

Dilution of Mud System to Control Low Gravity Solid by Adding Base Fluid

Dilution of Mud System to Control Low Gravity Solid by Adding Mud

Dogleg Severity Calculation based on Radius of Curvature Method

Dogleg Severity Calculation Based on Tangential Method

Drill pipe pulled to lose hydrostatic pressure

Equivalent Circulating Density (ECD) in ppg

Estimate gas migration rate in a shut in well

Estimate Type of Influx (kick)

Formation Integrity Test (FIT) Procedure and Calculation

Formation Pressure from Kick Analysis

Hydraulic Horse Power (HPP) Calculation

Hydrostatic Pressure (HP) Decrease When POOH

Hydrostatic Pressure Calculation

Increase mud weight by adding barite

Increase Mud Weight by Adding Calcium Carbonate

Increase Mud Weight by Adding Hematite

Lag Time for Drilling Business and How to Calculate Theoretical Lag Time

Leak Off Test (Procedures and Calcuation)

Loss of Hydrostatic Pressure due to Lost Return

Maximum formation pressure that can be controlled when we shut the well in

Maximum influx height to equal the maximum allowable shut-in casing pressure

Maximum Initial Shut-In Casing Pressure (MISICP)

Maximum surface pressure from kick tolerance factor

Mixing Fluids of Different Densities with Pit Space Limitation

Mixing Fluids of Different Densities with Pit Space Limitation

Pressure and force relationship and applications

Pressure Required to Break Circulation in Annulus

Pressure Required to Break Circulation Inside Drillstring

Pump Output Calculation for Duplex Pump and Triplex Pump

Pump pressure and pump stroke relationship

Round trip ton-miles Calculation

Starting volume of original mud (weight up with Barite)

Starting volume of original mud (weight up with Calcium Carbonate)

Starting volume of original mud (weight up with Hematite)

Temperature Conversion Formulas

Volume of mud in bbl increase due to adding barite

Volume of Mud Increases due to Adding Calcium Carbonate

Volume of Mud Increases due to Adding Hematite

Weight of slug required for desired length of dry pipe with set volume of slug

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what is plastic viscosity?

Plastic Viscosity (PV) is the resistance of fluid to flow.