Faculty of Engineering Technology
Department Surface Technology and Tribology
Master programme Mechanical Engineering
As part of his / her masterassignment
will hold a speech entitled:
EXPERIMENTAL SETUP AND STUDY TO ANALYSE THE FRICTION BETWEEN A GRIPPER-TOOTH AND LINER
|Room||Horst N 109|
In order to improve the probability of reaching deeper reserves and reduce drilling costs in the hydrocarbon energy marked, Shell has developed Solid Expandable Tubular Technology (SETT). The key of this technology is expansion of liners after placement during construction of a well. The liners are mechanically expanded by pulling a solid cone through the liners. One of the systems making SETT more accessible is the Jack and Pull (J&P) system. The J&P system uses a cyclic gripper tool which creates an anchor at the inner wall of a liner and a hydraulic jack to pull a cone through a liner. The anchor created by the cyclic gripper tool needs to create sufficient friction to hold the expansion forces provided by the jack. This friction is created by pressing segments containing hard steel teeth into the inner wall of the liner and is the subject of the current thesis.
The friction of the tooth-liner contact is first estimated by constructing a theoretical model based on slipline-theory. To validate the model and measure the friction, an experimental device is developed. A major requirement for this device was to measure and apply a constant normal load to indent the tooth in a liner and measure and apply a frictional load in the sliding direction. The developed device is capable of measuring the friction of a full scale single tooth and liner segment for a load range up to 100kN.
Friction measurements are performed for a model system and the proposed model predicts the experimental results satisfactory under certain conditions. To compare the results form an ideal system to more realistic conditions, friction measurements are also performed for a liner as used in the field. Finally, two new tooth geometries were introduced to show the potential of increasing the friction further.
|Prof.dr.ir D.J. Schipper
dr.ir. R. Bosman
dr.ir. R. Loendersloot
(mentor from company)