A study of the influence deformation of the drilling riser on the longitudinal oscillations of the drill string
DOI:
https://doi.org/10.31471/1993-9868-2019-2(32)-18-28Abstract
The article deals with the study of the effect of drilling riser transverse vibrations on the longitudinal vibrations of the drill string and the change of the dynamic component of weight on the bit when drilling wells from floating drilling vessel in deep sea conditions. The impact assessment was carried out by comparing the results of the simulation of the drilling system in the software based on the Modelica language. For this purpose, a simulation model has been created to enable the study of the operation of the «drill ship – riser wire tension system – drilling riser – drill string heave compensator – drill string» system in the case of irregular sea agitation obtained from decomposition the JONSWAP energy spectrum. The influence of the deformation of the drilling riser on the axial vibrations of the drill string is taken into account by introducing into the "classical" equation of the axial vibrations of the drill string the nonlinear term of the longitudinal-transverse strain. The drill string transverse deformation was determined based on the assumption that the axes of deformation of the drilling riser and drill string were coincident in the course of operation. A series of simulation experiments was carried out in the case from three to six WMO sea state code, absence of action of sea currents and active mode of work of the drill string heave compensator. The obtained results show that the greatest influence of the deformation of the drilling riser on the axial vibrations of the drill string is observed in the section at the level of the well head, where the amplitude of longitudinal vibrations increases up to 4 times. In general, the deformation of the drilling riser causes the growth of the dynamic impact factor of weight on the drill bit to increase by 4-7% for the investigated structure of the drilling system.
References
Al-Batati N., Hashim F. M., Pao K. S. Simulation of Drill String Vibration inside Well Bore due to Riser’s Oscillation. Research Journal of Applied Sciences, Engineering and Technology. 2014. Vol. 7. No 1. P. 174–182. DOI: 10.19026/rjaset.7.237.
Chun-jie H., Tie Y., Yuan-song T. The analysis on coupling vibration of drill string and marine riser in deep-water drilling. The International Journal of Multiphysics. 2013. Vol. 7. No 1. P. 53–60. DOI: 10.1260/1750-9548.7.1.53.
Inoue T., Sakura K., Fukui T., Kyo M. Fatigue Strength Evaluation of Drill Pipe for Challenging Scientific Drilling Operations. IADC/SPE Asia Pacific Drilling Technology Conference. Bangkok, Thailand: Society of Petroleum Engineers, 2014-08-25.
Liao M., Zhou Y., Su Y., Lian Z., Jiang H., Manoach E., Stoykov S., Wiercigroch M. Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water. MATEC Web of Conferences. 2018. Vol. 148. No 7. P. 16010. DOI: 10.1051/matecconf/201814816010.
Tikhonov V. S., Safronov A. I. Calculation of the stress-strain state of a deep-water drilling column over time. Strength of Materials. 1995. Vol. 27. No 8. P. 470–475. DOI: 10.1007/BF02209345.
Slabyi O. O. Doslidzhennia amplitudo-chastotnykh kharakterystyk dynamichnoho zusyllia natiahu verkhnoho kintsia vodoviddilnoi kolony ta vplyvu na noho parametriv burovoi systemy. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch. 2014. No 2(51). P. 88–94.
Slabyi O. O. Pobudova matematychnoi modeli kompensatora vertykalnykh peremishchen burylnoi kolony pidkronblochnoho typu. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch. 2014. No 3(52). P. 88–100.
Slabyi O. O. Doslidzhennia roboty kompensatora vertykalnykh peremishchen burylnoi kolony iz aktyvnoiu pidsystemoiu zamknenoho tsyklu. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch. 2015. No 4(57). P. 27–35.
Keber M., Wiercigroch M. Dynamics of a vertical riser with weak structural nonlinearity excited by wakes. Journal of Sound and Vibration. 2008. Vol. 315. No 3. P. 685–699. DOI: 10.1016/j.jsv.2008.03.023.
Slabyi O. Studying the coupled axial and lateral oscillations of the drilling riser under conditions of irregular seaways. Eastern-European Journal of Enterprise Technologies. 2018. Vol. 3. No 7(93). P. 27–33. DOI: 10.15587/1729-4061.2018.132661.
Vekeryk V. Y. Sovershenstvovanye tekhnolohyy uhlublenyia skvazhyn yzmenenyem dynamyky rabotы burylnoho ynstrumenta: dys. d-r. tekhn. nauk: 05.15.10, Yvano-Frankovskyi ynstytut nefty y haza. Yvano-Frankovsk, 1991. 749 p.
Fritzson P. Principles of Object Oriented Modeling and Simulation with Modelica 3.3. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2014.
Meyer G. H. The time-discrete method of lines for options and bonds. New Jersey: World Scientific Pub, 2015. 269 p.
.png)
1.png){kind=logo}
