A Review of the Evaluation, Control, and Application Technologies for Drill String Vibrations and Shocks in Oil and Gas Well
Table 7
Comprehensive comparative analysis of drill string V&S control methods.
Classification
Method/mechanism
Advantages
Disadvantages
Technologies
Adapt the form
Transverse/ lateral
Axial/ longitudinal
Torsional/ rotational
Passive control
Prevent resonance
The earliest, the most commonly used, mainly considering the inherent characteristics of drill string, fast calculation, can avoid the vibration mode
Model is simplified, the control of drill string structure optimization is limited
Adjust RPM, drilling fluid lubrication
√
√
√
Adjust WOB
√
/
√
Change energy distribution
The most common, mainly considering the boundary conditions of the drill string system economic and effective, simple and feasible, mature technology
The contact between tools and borehole wall will increase the friction of the drill string torque, reduce drill string extension ability and the drilling efficiency