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Drill Pipe Stress and Cumulative Fatigue Analysis in Complex Wells Drilling: New Approach in Fatigue Optimization
Abstract In the today high-cost and complex drilling environment, the importance of drillstring failure issue has dramatically reappeared, in spite of many manufacturing and materials…
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Drilling Performance Contract: An Evolution in the Partnership Between Operator and Rig Contractor
Abstract Performance contracts are increasingly common in the drilling industry, especially in recent years. This incentivized contract structure, established as a partnership between operator and…
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Drilling Three-Mile Laterals Tighter and Safer with a New Magnetic Reference Technique
Abstract Three-mile laterals have become more common over the last five years of onshore US drilling. They are especially commonplace in the Appalachian and Permian…
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Dynamics Vibration Prediction and Comparison with Downhole Data Measurements in Unconventional Wells
Excessive vibrations may induce equipment failures. It is crucial to accurately model the drillstring dynamics in order to help drilling engineers make better decisions and…
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Fifty Ways to Leave Your Wellbore: An Honest Look at the Causes and Costs of Unplanned Sidetracks
Abstract Unplanned sidetracks are low-frequency high-cost events that have meaningful negative impact on the economics of oil field development. While it is clearly desirable to…
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How Drillstring Rotation Affects Critical Buckling Load?
Abstract Buckling of tubulars inside wellbores has been the subject of many researches and articles in the past. However, these conservative theories have always followed…
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How Motor Bend Affects Stick-Slip Vibrations: Modeling and Case Study
Abstract Contact friction along drill string is one of root causes of stick-slip vibrations, especially when drilling an unconventional well with a long lateral section.…
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How the Bit Profile and Gages Affect the Well Trajectory
Abstract The importance of wellbore deviation is well recognized by the drilling industry. An analysis of the directional behavior of a drilling system must include…
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Improving Surface Oscillation Tools Performance Using Time-Domain Dynamics and Torque and Drag Models
Abstract Overcoming friction in sliding mode represents a challenging task when drilling an unconventional well with a long lateral section. Among the possible ways to…
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Learning Curve Benefits Resulting From the Use of a Unique BHA Directional Behavior Drilling Performances Post-Analysis
Abstract With the current market’s high prices for drilling units and sophisticated directional and formation assessment services, low systems reliability or poor directional performance in…
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Micro Dogleg Detection with Continuous Inclination Measurements and Advanced BHA Modeling
Abstract Micro doglegs are a natural effect of any vertical or directional well that can explain a wide variety of down hole problems, from additional…
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Mitigating and Understanding Stick-Slip in Unconventional Wells
Abstract Stick-slip is still present in most of the wells drilled today, especially in unconventional wells. Friction is an inevitable and important force along the…