Optimization of Bit Selection and BHA Design for the Oberkling Gas Storage Drilling Campaign

Research output: ThesisMaster's Thesis


During this thesis, two drilling projects of the Oberkling gas storage campaign were accompanied and have been investigated directly. A profound analysis of the used drilling bits and bottom hole assemblies (BHA) was performed in order to optimize performance. Results of the evaluation were directly implemented in the on-going planning. The thesis covers an introduction into the challenging geological structure and gives a general overview of IADC’s bit dull grading and bit wear. RAG’s sensor system is introduced and presented as the foundation of further analysis with basic tools for a quick evaluation of the situation at hand. In addition, a detailed inspection of a roller cone bit used in the Oberkling well OKSP-001 documents its damage as investigated in Smith bits’ reliability center. An analytical examination of each run was performed in order to detect shortcomings. A final discussion includes the recommendation of a different BHA configuration along with the economic evaluation of such change.


Translated title of the contributionOptimierung der Meißelwahl und des BHA-Designs für das Oberkling Gas Speicher Bohrprojekt
Original languageEnglish
Awarding Institution
  • Heinzle, Heimo, Supervisor (external), External person
  • Thonhauser, Gerhard, Supervisor (internal)
  • Tausch, Oliver, Co-Supervisor (external), External person
Award date30 Mar 2012
Publication statusPublished - 2012