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109 pages

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This is the exercise book accompanying Pressure Control During Drilling Porous sedimentary formations penetrated by the rock bit contain fluids such as oil, gas or salt water.

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Pål has worked as a professor with students for more than 40 years. His favorite activity has been to be their guide, supervisor and co-author.

He is especially eager to develop new, useful knowledge, and to make it known for a broader audience. For this purpose, he has wr

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This is the exercise book accompanying Pressure Control During Drilling

Porous sedimentary formations penetrated by the rock bit contain fluids such as oil, gas or salt water. If the hydrostatic pressure of the drilling fluid drops below the formation pore pressure, pore fluid will enter the well and “kick” the mud out of the well. To control the pressure while drilling you need to understand the behavior of gas. This book aims at explaining the physics and the engineering approaches behind pressures in the sediments, detection of unstable wellbores, equipments necessary to close and kill the well, killing methods and offshore challenges.

These exercises have been made to fit the content of the book Pressure Control During Oil Well Drilling. In present exercise book all the exercises have been solved by students in the corresponding course at the Department of Petroleum Engineering and Applied Geophysics at NTNU of Trondheim, Norway, and revised in 2015.

Pål Skalle

Trondheim, May 2015

- Preface

- Fluid Properties
- Rheology control
- Rheology control
- Flocculation
- Mud contamination
- Flocculation
- Fluid additives
- Fluid additives

- Rheology control
- Rheological models
- Bingham/ Power law
- Bingham/Power-law
- Bingham / Power-law. Regression
- Effective viscosity
- All models
- All models. Regression
- All models

- Bingham/ Power law
- Drilling fluid dynamics
- Velocity profile. Continuity equation
- Velocity profile. Momentum flux
- Velocity profile
- Pressure loss vs. rheology I
- Pressure loss vs. rheology II
- Pressure loss. Power-law
- Pressure loss. Turbulent. Energy equation
- Pressure loss vs. flow rate
- Pressure loss. Use field data to evaluate model
- Pressure loss. Effect of rotation
- Pressure loss. Nozzles. OFU
- Swab pressure. Cling factor
- Swab pressure

- Velocity profile. Continuity equation
- Hydraulic program
- Mud pump issues
- Optimal nozzles? Section wise
- Liner selection. Section wise
- Hydraulic program. Section wise (i.e. all liners are treated as if in range I)
- Optimal parameters for BHHP. OFU. Section wise
- Liner selection. Complete well
- Liner selection. Complete well

- Mud pump issues
- Well challenges
- Filtration control
- Filtration control
- Cuttings concentration I
- Cuttings concentration II
- Density control
- Density control
- ECD. Barite
- ECD. Fluid and flow
- Water activity
- Shale stability
- Shale stability
- Wellbore problem

- Filtration control
- Supportive Information
- Pump (National 12-P-160) and hydraulic program data
- Pressure loss equations
- Conversion factors and formulas

- Pump (National 12-P-160) and hydraulic program data

- Solutions to exercises in drilling fluid engineering

- Fluid Properties - Solutions
- Rheology control - Solution
- Rheology control - Solution
- Flocculation - Solution
- Mud contamination - Solution
- Flocculation - Solution
- Fluid additives - Solution
- Fluid additives - Solution

- Rheology control - Solution
- Rheological models - Solution
- Bingham / Power-law - Solution
- Bingham / Power-law - Solution
- Bingham / Power-law. Regression - Solution
- Effective viscosity - Solution
- All models - Solution
- All models. Regression - Solution
- All models - Solution

- Bingham / Power-law - Solution
- Drilling fluid dynamics - Solution
- Velocity profile. Continuity equation - Solution
- Velocity profile. Momentum flux - Solution
- Flow profile - Solution
- Pressure loss vs. rheology I - Solution
- Pressure loss vs. rheology II - Solution
- Pressure loss. Power law - Solution
- Pressure loss. Turbulent flow. Energy equation - Solution
- Pressure loss vs. flow rate - Solution
- Pressure loss. Field data - Solution
- Pressure loss. Effects of rotation - Solution
- Pressure loss. Bit nozzle. OFU - Solution
- Swab pressure. Clinging factor - Solution
- Swab pressure – Solution

- Velocity profile. Continuity equation - Solution
- Hydraulic program – Solution
- Mud pump issues – Solution
- Nozzle selection. Section wise – Solution
- Liner selection. Section wise – Solution
- Hydraulic program. Section wise – Solution
- Optimal parameters with BHHP. OFU. Section wise –Solution
- Liner selection. Complete well – Solution
- Liner selection. Complete well – Solution

- Mud pump issues – Solution
- Wellbore challenges – Solutions
- Fluid Properties - solutions
- Filtration control – Solution
- Cuttings concentration I – Solution
- Cuttings concentration II – Solution
- Density control – Solution
- Density control – Solution
- ECD. Barite – Solution
- ECD. Flow rate & fluid consistency – Solution
- Water activity – Solution
- Shale stability – Solution
- Wellbore problems – Solution
- Shale stability - Solution

- Fluid Properties - solutions