John Thorogood




Directional Drilling

Novel Workflows and Under-reaming Measurements Reduce Risk by Supporting Decision Making
Rasheed W, Thorogood JL, Bernardini J, SPE 173131, , SPE/IADC Drilling Conference, London, March 2015

Performance Optimisation of Steerable Systems
Thorogood JL and Hogg TW,  ASME Energy Resources Technology Conference, New Orleans, January 1990.

The Travelling Cylinder - A Practical Tool for Collision Avoidance
Thorogood JL. and Sawaryn SJ., SPE 19989, presented at the 1990 SPE/IADC Drilling Conference, Houston. Published in SPEDE, March 1991.

QuantitativeRisk Assessment of Subsurface Well Collisions
Thorogood JL, Tourney FG, Crawley FK, Woo G, SPE 20908, Presented at the European Petroleum Conference, The Hague, October, 1990.

Application of Risk Analysis Methods to Subsurface Well Collisions
Thorogood JL, Hogg TW and Williamson HS, SPE Drilling Engineering, December 1991, Vol 6 No 4, pp 299-304

Increasing Extended Reach Capabilities through Wellbore Profile Optimisation
Banks SM, Hogg TW and Thorogood JL, SPE/IADC 23850, presented at the 1992 SPE/IADC Drilling Conference.

A Compendium of Directional Calculations Based on the Minimum Curvature Method
Sawaryn, SJ & Thorogood JL, SPE Annual Technical Conference and Exhibition, Denver, Colorado, 5-8 October, 2003.  Peer reviewed version in SPE Drilling and Completion March 2005.  SPE 84246

Wellbore Collision Avoidance: state of the art
deWardt JP, Mullin S, Thorogood JL, Wright J and Bacon R, SPE 163411, SPE/IADC Drilling Conference, Amsterdam , March 2013.