Presentation - Halliburton

Tool Reliability in a Downhole Environment 

Chip LaCombe 

Drilling Optimization 

Manager

Tool Reliability in a Down Hole Environment 

Operators throughout the world rely on these special 

tools to improve the efficiency and lower the total cost of 

drilling and production programs. Downhole tool reliability 

is one factor that can directly impact these operational 

costs and efficiencies. This presentation will discuss 

processes to help identify and quantify the factors which 

can negatively impact downhole tool reliability and how 

reliability is managed. 

• Temperature 

• Fluids Environment 

• Downhole Dynamics - Vibration 

© 2012 HALLIBURTON. ALL RIGHTS RESERVED. 

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Factors Effecting Vibration 

• Hole Angle 

• Drilling Fluid Properties 

• Rig Electrical System 

• Backreaming With high RPM 

• Bit Type 

• Bit-Lithiology Interaction 

• Borehole Size/ BHA Size 

• BHA Stabilization 


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Torque and Drag Analysis 

Is torque and drag typically only run at total depth to determine if the well can be drilled? 

Stretch 

Depth 

Inc. 

Helical Buckling - 

WOB 

Sinusiodal 

Buckiling 

Tripping Out Rot on Bottom Rot off Bottom Sliding 

9500 0 Rotating - 7K Sliding - 7K 12.6' 12' 12.6' 12' 

9600 0 Rotating - 8K Sliding -8K 12.8' 12.2' 12.8' 12.2' 

9950 32 Rotating - 16K 15K 13.5' 12.8' 13.4' 12.7' 

10600 61 22K 21K 14.8' 13.7' 14.3' 13.3' 

11100 89 22K 22K 15.4' 14.1' 14.7' 13.3' 

12100 89 22K 22K 16.7' 14.8' 15.5' 13.3' 

13100 87 24K 23K 18.2' 15.6' 16.3' 13.3' 

14100 88 24K 23K 19.9 16.3' 17.2' 13.3' 

15100 88 25K 24K 21.6" 17.1' 18' 13.3' 

15614 88 27K 25.5K 22.4' 17.5' 18.4' 13.4' 


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Bottom Hole Assembly Modeling 

• MaxBHA 

– Critical Whirl 

– Bending Stresses 

– Endurance Stresses 

– Deflection 


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Operational Practices – Poor Transition 


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DDSr – Drillstring Dynamics Sensor 

Detect and avoid vibrations to maximize drilling efficiency 

Best results when utilized with proactive monitoring 


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How it Works 

Vibration Detection Sensors And Vibration Mechanisms 

Mechanism Mode Frequency Measurement Device 

Bit Bounce Axial 1 - 10 Hz DDSr / M5-DDS2 / DDS / 

SVSS 

Bit Whirl Lateral / Torsional 3 – 50 Hz DDSr / M5-DDS2 / DDS / 

(SVSS / IVSS) 

BHA Whirl Lateral / Torsional 5-20 Hz DDSr / M5-DDS2 / DDS / 

(SVSS / IVSS) 

Stick-Slip Torsional 0.001 - 5 Hz DrilSaver III / DDSr / M5- 

DDS2 / TEM 

Lateral Shocks Lateral / Axial DDSr / M5-DDS2 / DDS / 

SVSS / IVSS 

Torsional Resonance Torsional 50 -250 HZ DDSr / M5-DDS2 / DDS 

Parametric Resonance Lateral / Axial / Torsional 1 – 50 Hz DDSr / M5-DDS2 / DDS 

Bit Chatter Torsional 50 – 250 Hz DDSr / M5-DDS2 / DDS 

Modal Coupling Lateral / Axial / Torsional 1-50 Hz DDSr / M5-DDS2 / DDS / 

DrilSaver III 


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Real-Time Displays 


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Advanced Drilling Technology – ADT Engineering 

Drillstring Integrity Service 

• Focuses on: 

• Prevention of mechanical overload 

• Protection from fatigue 

• Protection from excessive shocks and vibration 

• This is achieved by fully understanding the expected conditions and using all 

available tools to model, measure and optimize 

• Model BHA forces and natural frequencies 

• Measure downhole forces and vibration 

• Optimize BHA design and the selection of drilling parameters to prevent 

premature failure of drillstring components 

• Compare the performance of drilling assemblies to determine the most efficient 

design and bit selection 


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Summary 

As you can see there are many factors affecting tool reliability. Proper planning, 

Execution, and monitoring can significantly and positively impact reliability, 

operational efficiency, as well as cost. 


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Thank you, questions? 


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Presentation - Halliburton

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