A model for the drilling device is proposed consisting of several degrees of freedom.
Then, ANSYS finite element software is employed to simulate a numerical model of the drilling process, investigate the distribution of the stress field in the frozen wall, and to verify the reliability of the selected scheme.
Next, a phenomenological model for the drilling action is proposed, assuming that the interface laws are rate-independent and that the state of variables are averaged over at least one revolution of the bit.
The author states that it can provide source software written for solving the model of the drilling for those interested.
For this reason, the present study examined first a model of the drilling rate prediction in Ahvaz oil field.
A desirable model for the drilling rate prediction is one which can be employed in different areas.
The following scheme of calculation can be proposed, in which the following abbreviations can be noticed (Fig. 1): Open image in new window Fig. 1 The calculation scheme for establishing the mathematical model of the drilling string.
Finally, a complete deviated drillstring has been simulated by combining the bottom-hole assembly model with a model of the drill pipe and collars.
In this model, the final drilling and completion activities, as well as the surface and transport facilities are determined (Mungan 1982).
Different forms of the inversion models in the drilling design and actual drilling stages are given.
