Untersuchung zur Anordnung von Elementen im Bottom Hole Assembly zur Realisierung von Aufbauraten

Translated title of the contribution: Analysis about the order of elements in the Bottom Hole Assembly to calculate

Katharina Tewagner

Research output: ThesisDiploma Thesispeer-review


Directional Drilling is a technology to drill a deviated well.
The focus lies on the actual build-up rates of wells. Three main categories are used to achieve build up rates, rotary-, conventional steerable- and rotary steerable systems. The main target of the diploma thesis was to calculate build-up rates from already drilled wells with five selected models. The models focused on rotary- and conventional steerable systems. One of these models was set-up using a new combination from sight force and bit steerablity. First, the used bottom hole assemblies were analysed to get the necessary data for predicting build-up rates. These data were put into the selected models. The calculations were made in programs written in Excel and with proprietary softwares provided by the companies. The results of calculated build-up rates were compared with the actual values and shown in diagrams. In case of high deviation from the real values, the main parameter influencing build-up rates was investigated.
Through the change of parameters it was possible to get a new build-up rate actually closer to the real values. Finally, a comparison between the models was completed. Hence it was possible to give recommendations as to which models acts best under special conditions.
Translated title of the contributionAnalysis about the order of elements in the Bottom Hole Assembly to calculate
Original languageGerman
Awarding Institution
  • Montanuniversität
  • Thonhauser, Gerhard, Supervisor (internal)
Publication statusPublished - 18 Oct 2005


  • Directional Drilling
  • Build Up Rates
  • Sliding
  • Rotating

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