Formulas and Calculations
Formulas and associated calculations are important for design, drilling engineering and drilling operations. Few equations and related calculations are given in the following pages.
The intent is to provide basic equations and formulas for downhole drilling operations. The readers may find it as a tutorial guide. It is known that it will be very difficult to cover all the aspects and areas of drilling and it is hoped that the page will be updated with additional topics.
OTHER REFERENCES
More details can be obtained from 
501 Solved Problems for Drilling Operations.
SEE ALSO
Glossary of Drilling Operations
The Oil Drilling (Video)
The Mud Lag Time (Video)
The General Calculations(Video)
EXTERNAL LINKS
RSS
The Halliburton RSS Point the Bit System (Video)
The Baker Hughes RSS Push the Bit System (Video)
The Weatherford RSS (Video)
The Schlumberger RSS Push the Bit System (Video)
The Gyrodata RSS (Video)
Mud Motor
The Dyna-Drill Motor (Video)
The Jaguar Mud Motor System (Video)
The Baker Hughes Navi-Drill (Video)
The Mud Motor Basic Function (Video)
The Hunting Mud Motors (Video)