I said about drilling formula software few weeks ago but my friend and I had limited time to write software. Therefore, we decide that we will give drilling formula in Excel spread sheet for **FREE** instead of software.

The advantages of Excel sheets over the general software are as follows:

• People can use it easily without any installation required and most of computers have MS Excel or Office program that can run the files. Moreover, some people may face the hassle because their company computes will not allow any installation.

• It is easy ways for us to update the Excel spread sheet and deliver to you.

Currently, we are trying to integrate useful drilling formulas from drillingformulas.com into the Excel file. And we expect that the drilling formula spread sheet will be launched on **Monday, 28 March 2011**. **Everything is FREE** and hopefully our file will help you and your work.

If you don’t’ want to miss our **FREE and useful drilling formula spread sheet**, please **LIKE** us on our facebook.

**The following formulas will be in the Drilling Formula Excel sheet.
**

• Accumulator capacity

• Amount of cuttings drilled per foot of hole drilled

• Annular Capacity

• Annular Pressure Loss

• Annular Velocity (AV)

• Bulk Density of Cuttings by using Mud Balance

• Buoyancy Factor (BF)

• Conversion Table

• Convert Temperature Unit

• Converting Pressure into Mud Weight

• Cost Per Foot

• Critical RPM

• D -exponent

• Decrease oil water ratio

• Depth of washout

• Determine oil water ratio from a retort analysis

• Determine the density of oil/water mixture

• Dilution to control LGS

• Directional Survey

• Displacement Calculation

• Dogleg Severity Calculation

• ECD Calculation

• ECD, FIT, LOT calculation

• Formation Temperature

• How many feet of drill pipe pulled to lose certain amount of hydrostatic pressure (psi)

• Hydraulic Horse Power (HPP)

• Hydrostatic Pressure (HP)

• Hydrostatic Pressure (HP) Decrease When POOH

• Increase mud weight by adding Barite

• Increase mud weight by adding Calcium Carbonate

• Increase mud weight by adding Hematite

• Increase oil water ratio

• Inner Capacity

• Light weight spot fill to balance formation pressure

• Loss of hydrostatic pressure due to filling water into annulus in case of lost return

• Mix different density

• Pressure and force

• Pressure Gradient

• Pressure required to break circulation

• Pump out (both duplex and triplex pump)

• Pump Pressure and Pump Stroke Relationship

• Reduce mud weight (dilution)

• Slug Calculation

• Specific Gravity (SG)

• Sutck Pipe Calculation

• Ton Miles

• Lag time

• Trip margin

• Kick tolerance factor (KTF)

• Maximum suface pressure from kick tolerance information

• Maximum formation pressure (FP)

• Maximum allowable shut in casing pressure

• Maximum influx height

• Adjusting maximum allowable shut-in casing pressure for new mud weight

• Formation pressure with the well shut-in

• Estimate type of influx

• Estimate gas migration rate with an empirical equation

**Ref book: ** **Formulas and Calculations for Drilling, Production and Workover, Second Edition**

please what is yur experience on liner cementaion in deepwater wells with HPHT conditions.

Any case history with detailed illustrations including cement values for the job. if you drilled wells with narrow window between the porepressures and fracture gradient in deepwater horizon- how did you set up the wellplan to prevent kick and formation damage and optimize hydralics

I don’t have any deep water experience. I cannot answer you your question correctly.

Regards,

Rachain J.