TL LONGBOW: Development References

This list is by no means comprehensive, nor is it intended to be complete. These are simply the most-valued and critical resources used during the development of our software.

Educational Resources
o Eric W. Trant, BS Chemical Engineering, University of Texas at Austin, 1994
o Texas A&M University, education and reference resource (not a business partner)
o University of Texas, Austin, education and reference resource (not a business partner)

General, Planning, and Survey Calculations
o Lyons, Plisga, Standard Handbook of Petroleum and Natural Gas Engineering
o Sawaryn, Thorogood, A Compendium of Directional Drilling Calculations Based on the Minimum Curvature Method

Anti-Collision and Wellbore Surveying Accuracy
o Eric W. Trant, Owner Trant Logistics, LLC, Proprietary Proximity and Planning Algorithms
o ISCWSA: The Industry Steering Committee on Wellbore Survey Accuracy (Ellipsoid of Uncertainty, MWD/Gryo Error Models)
o Wolff, De Ward, Borehole Position Uncertainty -- Analysis of Measuring Methods and Derivation of Systematic Error Model
o SPE 67616, Williamson, Accuracy Prediction for Directional Measurement While Drilling
o SPE 90408, Torkildsen et al, Prediction of Wellbore Position Accuracy When Surveyed With Gyroscopic Tools
o SPE 36863, Brooks, Wilson, et al, An Improved Method for Computing Wellbore Position Uncertainty and its Application to Collision and Target Intersection Probability Analysis
o SPE 92554, McNair, Lance, et al, Implementation of a New Risk Based Well Collision Method
o SPE 101719, Poedjono et al, Well Collision Risk in Congested Environments
o SPE 108279, Poedjono et al, Minimizing the Risk of Well Collisions in Land and Offshore Drilling
o SPE 121040, Poedjono et al, Anti-Collision Risk Management for Well Placement
o SPE 116155, Brooks, A New Look at Wellbore Collision Probability
o Lhuiller, Perriollat, Uncertainty Ellipsoid Calculations for Complex 3D Reconstructions

Torque and Drag
o Aadnoy, Anderson, Design of Oil Wells Using Analytical Friction Models
o SPE 114684, Aadnoy, Theory and Application of a New Generalized Model for Torque and Drag
o SPE 97079, Rezvani, Techentein, Torque and Drag Modelling for Horizontal Open Hole Completions


Trant Logistics, LLC, Member Society of Petroleum Engineers.


Do you need directional well planning services? Call us at 214.250.6854, US Central. TL Longbow is in use in North America, Europe, South America, the Middle East and Australia. TL Longbow includes everything you need to plan, drill, and document your directional wells.

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Eric@TrantLogistics.com for Tech Support
214.250.6854 US Central