Rock Mechanics and Rock Engineering

, Volume 50, Issue 10, pp 2795–2804 | Cite as

Experimental Study on Longmaxi Shale Breaking Mechanism with Micro-PDC Bit

  • Teng Wang
  • Xiaohua Xiao
  • Haiyan Zhu
  • Jingying Zhao
  • Yuheng Li
  • Ming Lu
Original Paper


China has abundant shale gas resource, but its geological conditions are complicated. This work sought to find the shale breaking mechanism with the polycrystalline diamond compact (PDC) bit when drilling the shale that is rich in stratification. Therefore, a laboratory-scale drilling device based on a drilling machine is developed. The influences of Longmaxi shale stratification on drilling parameters in the drilling process with micro-PDC bit are investigated. Six groups of drilling experiments with six inclination angles (β = 0°, 15°, 30°, 45°, 60° and 90°), total thirty-six groups, are carried out. The weight on bit reaches the maximum value at β = 30° and reaches the minimum value at β = 0°. The biggest torque value is at β = 30°, and the smaller torque values are at β = 15°, β = 45° and β = 60°. When the inclination angle is between 30° and 60°, the shale fragmentation volume is larger. The inclination angle β = 0° is beneficial, and β = 15° and β = 60° are detrimental to controlling the drilling direction in the Longmaxi shale gas formation.


Laboratory research Longmaxi shale Joint inclination Breaking mechanism Drilling parameter 



This work was performed as part of a shale project supported by international cooperation project of Sichuan province under Grant No. 2015HH0020. This work was supported by the search Foundation of National Natural Science Foundation of China (No. 51604232), and the 973 Program of China under Grant No. 2014CB239205.


  1. Baker R, Shen Y, Zhang J, Robertson S (2010) SHALE ENERGY: developing the Barnett-difficult directional intervals in Barnett spur development of new PDC bit design. World Oil 231(8):95–98Google Scholar
  2. Ewy RT, Stankovich RJ (2002) Shale-fluid interactions measured under simulated downhole conditions. In: SPE/ISRM rock mechanics conference. Society of Petroleum Engineers. doi: 10.2523/78160-ms
  3. Gerbaud L, Menand S, Sellami H (2006) PDC bits: all comes from the cutter/rock interaction. In: IADC/SPE drilling conference. Miami, Florida, USA, 21–23 Feb. doi: 10.2118/98988-ms
  4. Giumelli M, O’Shea P, Australia E (2014) Offshore exploration program benefits from rolling PDC cutter technology, timor sea Australia. In: IADC/SPE Asia pacific drilling technology conference. Society of Petroleum Engineers. Bangkok, Thailand, 25–27 Aug. doi: 10.2118/170532-ms
  5. Gong Q, Zhao J, Jiao Y (2005) Numerical modeling of the effects of joint orientation on rock fragmentation by TBM cutters. Tunn Undergr Sp Technol 20(2):183–191. doi: 10.1016/j.tust.2004.08.006 CrossRefGoogle Scholar
  6. Han G, Mike B (2006) Percussion drilling: from lab tests to dynamic modeling. In: 2006 SPE international oil and gas conference and exhibition in China. Society of Petroleum Engineers. Beijing, China. doi: 10.2118/104178-ms
  7. Howarth DF, Rowlands JC (1987) Quantitative assessment of rock texture and correlation with drillability and strength properties. Rock Mech Rock Eng 20(1):57–85. doi: 10.1007/BF01019511 CrossRefGoogle Scholar
  8. Innaurato N, Oggeri C, Oreste P, Vinai R (2011) Laboratory tests to study the influence of rock stress confinement on the performances of TBM discs in tunnels. Int J Miner Metall Mater 18(3):253–259. doi: 10.1007/s12613-011-0431-z CrossRefGoogle Scholar
  9. Kriechbaum K, Brown K, Cady I, Max VDH, Kerry K, Eric K, Avi O (2010) Results from testing of two rotary percussive drilling systems. In: Earth and space 2010: engineering, science, construction, and operations in challenging environments. ASCE, pp 1394–1401. doi: 10.1061/41096(366)125
  10. Kwon K, Song C, Park J, Oh J, Lee J, Cho J (2014) Evaluation of drilling efficiency by percussion testing of a drill bit with new button arrangement. Int J Precis Eng Manuf 15(6):1063–1068. doi: 10.1007/s12541-014-0437-3 CrossRefGoogle Scholar
  11. Muniz ES, Da Fontoura SAB, Lomba RFT (2004) Development of equipment and testing methodology to evaluate rock-drilling fluid interaction. In: Gulf rocks 2004, the 6th North America rock mechanics symposium (NARMS). American Rock Mechanics AssociationGoogle Scholar
  12. Oskarsson J (2011) Tribological testing of drill bit inserts. Professional Degree. Uppsala UniversityGoogle Scholar
  13. Scott DE, Isbell MR (2012) Innovative PDC cutter technology leads to step out performance improvements in diverse applications in shale plays. In: IADC/SPE drilling conference and exhibition. Society of Petroleum Engineers. San Diego, California, USA, 6–8 March. doi: 10.2118/151569-MS
  14. Stockey D, DiGiovanni A, Fuselier D (2014) Innovative non-planar face PDC cutters demonstrate 21% drilling efficiency improvement in interbedded shales and sand. In: IADC/SPE drilling conference and exhibition. Society of Petroleum Engineers. Fort Worth, Texas, USA, 4–6 March. doi: 10.2118/168000-ms
  15. Swift RP, Hagelberg CR, Hiltl M (2000) Stress wave-induced damage of sandstone for dry and wet conditions. In: 4th North American rock mechanics symposium. American Rock Mechanics AssociationGoogle Scholar
  16. Schormair N, Thuro K (2007) Fracture pattern of anisotropic rock by drilling or cutting using the PFC. In: 1st Canada-US rock mechanics symposium. American Rock Mechanics Association. doi: 10.1201/noe0415444019-c65
  17. Zhou Y, Detournay E (2014) Analysis of the contact forces on a blunt PDC Bit. In: 48th US rock mechanics/geomechanics symposium. American Rock Mechanics Association. Minneapolis, MN, USA, 1–4 JuneGoogle Scholar
  18. Zhu HY, Liu QY, Xiao XH, Jing JJ (2010) A 3D FEM methodology for the full-scale air hammer bit, teeth and rock contact analysis. Adv Mater Res 156–157(1425–1429). doi:10.4028/
  19. Zhu HY, Deng JG, Xie YH, Huang KW, Zhao JY, Yu BH (2012) Rock mechanics characteristic of complex formation and faster drilling techniques in Western South China Sea oilfields. Ocean Eng 44(1):33–45. doi: 10.1016/j.oceaneng.2012.01.031 CrossRefGoogle Scholar
  20. Zhu HY, Tao L, Liu QY, Lei ZD (2016) Multiscale change characteristics of Chinese Wufeng shale under supercritical carbon dioxide. In: SPE annual technical conference and exhibition. Society of Petroleum Engineers. doi: 10.2118/181369-MS

Copyright information

© Springer-Verlag GmbH Austria 2017

Authors and Affiliations

  • Teng Wang
    • 1
  • Xiaohua Xiao
    • 1
  • Haiyan Zhu
    • 2
  • Jingying Zhao
    • 4
  • Yuheng Li
    • 1
  • Ming Lu
    • 3
  1. 1.School of Mechatronic EngineeringSouthwest Petroleum UniversityChengdu SichuanChina
  2. 2.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu SichuanChina
  3. 3.School of Petroleum and Natural Gas Engineering, Southwest Petroleum UniversityChengdu SichuanChina
  4. 4.Unconventional Oil and Gas DepartmentSouthwest Oil and Gas Field of CNPCChengdu SichuanChina

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