Study of Torque, Drag and Hydraulics of a Deviated Drilled Well using Drilling Office Software

Document Type: Research Paper


1 Department of Petroleum Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

2 Petroleum Engineering Department, Petroleum Faculty, Amir Kabir University, Tehran, Iran


Rotational drilling was a revolution in drilling technology. It made the drilling process more efficient and faster and more depth of well could be achieved through rotation method. Besides all of its advantages, the rotation approach induced some problems like pipe sticking and downhole cleaning to the drilling procedure. Hole cleaning and reduction of torque and drag seems to be vital in inclined and horizontal ones due to its complexity and inclination. In this manuscript, hydraulic, torque and drag analysis were surveyed to investigate whether the path proposed for a well in the south of Iran is adequate or not. The required information was provided from associated drilling company and the proposed well trajectory used with hydraulic and drag data to run simulations via drilling office software. Effective axial load, Interaction of well and drill string, Comparison of stresses and von Mises graph were reported. Mentioned graphs showed the consistency of drilling project. The sensitivity of pressure drop to the pump flow rate and critical required rate to clean up annulus also reported pressure drop through the drilling system and required flow rate to clean up the bottom hole. In another word, obtained results of drag and hydraulic showed the consistency of trajectory.


[1] Al-Adasani A, Bai B. Recent developments and updated screening criteria of enhanced oil recovery techniques. InInternational Oil and Gas Conference and Exhibition in China 2010 Jan 1. Society of Petroleum Engineers.

[2] Ogunrinde JO, Dosunmu A. Hydraulics optimization for efficient hole cleaning in deviated and horizontal wells. InNigeria Annual International Conference and Exhibition 2012 Jan 1. Society of Petroleum Engineers.

[3] Lian Z, Zhang Q, Lin T, Wang F. Experimental and numerical study of drill string dynamics in gas drilling of horizontal wells. Journal of Natural Gas Science and Engineering. 2015 Nov 1;27:1412-20.

[4] Zhu X, Zhang Z. Design of an ultra-high torque double shoulder drill-pipe tool joint for extended reach wells. Natural Gas Industry B. 2017 Sep 1;4(5):374-81.

[5] Van Puymbroeck L. Increasing drilling performance using hydro-mechanical hole cleaning devices. InSPE Unconventional Gas Conference and Exhibition 2013 Jan 28. Society of Petroleum Engineers.

[6] Mitchell RF, Bjorset A, Grindhaug G. Drillstring analysis with a discrete torque/drag model. SPE Drilling & Completion. 2015 Mar 1;30(01):5-16.

[7] Mirhaj SA, Kaarstad E, Aadnoy BS. Torque and drag modeling; soft-string versus stiff-string models. InSPE/IADC Middle East Drilling Technology Conference and Exhibition 2016 Jan 26. Society of Petroleum Engineers.

[8] Sun LZ, Gao DL. Optimum Placement of Friction Reducer in Extended Reach Well. InApplied Mechanics and Materials 2012 (Vol. 101, pp. 339-342). Trans Tech Publications.

[9] Zhu XH, Li B, Liu QY, Chang XJ, Li LC, Zhu KL, Xu XF. New analysis theory and method for drag and torque based on full-hole system dynamics in highly deviated well. Mathematical Problems in Engineering. 2015;2015.

[10] Kucs RJ, Spoerker HF, Thonhauser G, Zoellner P. Automated Real-Time Hookload and Torque Monitoring. InIADC/SPE Drilling Conference 2008 Jan 1. Society of Petroleum Engineers.

[11] Simmons EL. A Technique for accurate bit programming and drilling performance optimization. InSPE/IADC Drilling Conference 1986 Jan 1. Society of Petroleum Engineers.

[12] Aarrestad TV. Torque and drag-two factors in extended-reach drilling. Journal of Petroleum Technology. 1994 Sep 1;46(09):800-3.

[13] Johancsik CA, Friesen DB, Dawson R. Torque and drag in directional wells-prediction and measurement. Journal of Petroleum Technology. 1984 Jun 1;36(06):987-92.

[14] Stuart D, Hamer CD, Henderson C, Gaynor T, Chen DK. New drilling technology reduces torque and drag by drilling a smooth and straight wellbore. InSPE/IADC Drilling Conference 2003 Jan 1. Society of Petroleum Engineers.

[15] Gaynor T, Hamer D, Chen DC, Stuart D. Quantifying tortuosities by friction factors in torque and drag model. InSPE Annual Technical Conference and Exhibition 2002 Jan 1. Society of Petroleum Engineers.

[16] Mohammadsalehi M, Malekzadeh N. Optimization of hole cleaning and cutting removal in vertical, deviated and horizontal wells. InSPE Asia Pacific Oil and Gas Conference and Exhibition 2011 Jan 1. Society of Petroleum Engineers.

[17] Larsen TI, Pilehvari AA, Azar JJ. Development of a new cuttings-transport model for high-angle wellbores including horizontal wells. SPE Drilling & Completion. 1997 Jun 1;12(02):129-36.

[18] Ahmed RM, Takach NE. Fiber sweeps for hole cleaning. SPE drilling & Completion. 2009 Dec 1;24(04):564-73.

[19] Wang Y, Salehi S. Drilling Hydraulics Optimization Using Neural Networks. InSPE Digital Energy Conference and Exhibition 2015 Mar 3. Society of Petroleum Engineers.

[20] Meng X, Zhou H, Fan H, Peng Q, Deng S. A Systematic Drilling Hydraulics Optimization Method for Improving Rate of Penetration and its Application in Ultra-Deep Wells. In International Petroleum Technology Conference 2016 Nov 12. International Petroleum Technology Conference.

[21] Lyons W. Working guide to drilling equipment and operations. Gulf Professional Publishing; 2009 Sep 16.

[22] Huang NC, Pattillo PD. Helical buckling of a tube in an inclined wellbore. International Journal of Non-Linear Mechanics. 2000 Sep 1;35(5):911-23.