Drilling Formulas
Formulas Calculations for Drilling, Production Work-over
Norton J. Lapeyrouse
and
and
Formulas and Calculations
CONTENTS
Chapter 1
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.
Basic Formulas
P. 3
Pressure Gradient Hydrostatic Pressure Converting Pressure into Mud Weight Specific Gravity Equivalent Circulating Density Maximum Allowable Mud Weight Pump Output Annular Velocity Capacity Formula Control Drilling Buoyancy Factor 12. Hydrostatic Pressure Decrease POOH Loss of Overbalance Due to Falling Mud Level Formation Temperature Hydraulic Horsepower Drill Pipe/Drill Collar Calculations Pump Pressure/ Pump Stroke Relationship Cost Per Foot Temperature Conversion Formulas
Chapter 2
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
Basic Calculations
P. 25
Volumes and Strokes Slug Calculations Accumulator Capacity — Usable Volume Per Bottle Bulk Density of Cuttings (Using Mud Balance) Drill String Design (Limitations) Ton-Mile (TM) Calculations Cementing Calculations Weighted Cement Calculations Calculations for the Number of Sacks of Cement Required Calculations for the Number of Feet to Be Cemented Setting a Balanced Cement Plug Differential Hydrostatic Pressure Between Cement in the Annulus and Mud Inside the Casing Hydraulicing Casing Depth of a Washout Lost Returns — Loss of Overbalance Stuck Pipe Calculations Calculations Required for Spotting Pills Pressure Required to Break Circulation
Chapter 3
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Drilling Fluids
Increase Mud Weight Dilution Mixing Fluids of Different Densities Oil Based Mud Calculations Solids Analysis Solids Fractions Dilution of Mud System Displacement - Barrels of Water/Slurry Required Evaluation of Hydrocyclone Evaluation of Centrifuge
P. 63
1
Formulas and Calculations
Chapter 4
1. 2. 3. 4. 5. 6. 7.
Pressure Control
Kill Sheets & Related Calculations Pre-recorded Information Kick Analysis Pressure Analysis
Norton J. Lapeyrouse
and
and
Formulas and Calculations
CONTENTS
Chapter 1
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.
Basic Formulas
P. 3
Pressure Gradient Hydrostatic Pressure Converting Pressure into Mud Weight Specific Gravity Equivalent Circulating Density Maximum Allowable Mud Weight Pump Output Annular Velocity Capacity Formula Control Drilling Buoyancy Factor 12. Hydrostatic Pressure Decrease POOH Loss of Overbalance Due to Falling Mud Level Formation Temperature Hydraulic Horsepower Drill Pipe/Drill Collar Calculations Pump Pressure/ Pump Stroke Relationship Cost Per Foot Temperature Conversion Formulas
Chapter 2
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18.
Basic Calculations
P. 25
Volumes and Strokes Slug Calculations Accumulator Capacity — Usable Volume Per Bottle Bulk Density of Cuttings (Using Mud Balance) Drill String Design (Limitations) Ton-Mile (TM) Calculations Cementing Calculations Weighted Cement Calculations Calculations for the Number of Sacks of Cement Required Calculations for the Number of Feet to Be Cemented Setting a Balanced Cement Plug Differential Hydrostatic Pressure Between Cement in the Annulus and Mud Inside the Casing Hydraulicing Casing Depth of a Washout Lost Returns — Loss of Overbalance Stuck Pipe Calculations Calculations Required for Spotting Pills Pressure Required to Break Circulation
Chapter 3
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Drilling Fluids
Increase Mud Weight Dilution Mixing Fluids of Different Densities Oil Based Mud Calculations Solids Analysis Solids Fractions Dilution of Mud System Displacement - Barrels of Water/Slurry Required Evaluation of Hydrocyclone Evaluation of Centrifuge
P. 63
1
Formulas and Calculations
Chapter 4
1. 2. 3. 4. 5. 6. 7.
Pressure Control
Kill Sheets & Related Calculations Pre-recorded Information Kick Analysis Pressure Analysis