**This is the second up date of drilling formula spread sheet, Drilling Formula Excel Sheet Version 1.2.**

Drillingformulas.com distributed the first version of drilling formula spread sheet on 28 March 2011 and another update on 18 May 2011. The calculation sheet has been downloaded over **8,300** times around the world since the fist distribution.

Today, the lasted up date of drilling formula spread sheet, **Drilling Formula Excel Sheet Version 1.2** is available for you to download. It is still totally **FREE !!!**.

**What new drilling formulas are added into this version?**

Cutting Slip Velocity Method#1

Cutting Slip Velocity Method#2

Surge and Swab Pressure Method#1

Surge and Swab Pressure Method#2

Hydrostatic Pressure Loss Due to Gas Cut Mud

Maximum pit gain from gas kick in water based mud

Maximum Surface Pressure from Gas Influx in Water Based Mud

**How many total useful drilling formulas in this version?
**There are a total of 75 formulas which are divided into 7 categories (Applied Drilling Formulas, Basic Drilling Formulas, Directional Drilling Calculation, Drilling Fluid Formulas, Engineering Formulas, Hydraulic Formulas and Well Control Formulas).

**How much will it cost?**

Nothing. The spread sheet is totally FREE for everybody.

A VERY USEFULL EXCEL SHEET, THANKS A LOT

good excel sheet.thanks.

very very good excel sheet.