Research on shape parameters of circular arc disc teeth for three-cone bit

Abstract

Through the single row drilling experiment, this paper studied the regularity of the tooth shape parameter's influence to the disc teeth's rock-breaking effect, which provided some basis for the composite teeth type roller bit's combined experimental study and the structure design of the tooth type. This experimental research is only for the circular arc disc teeth which is arranged on the composite teeth type roller bit's main tooth. The experiments were designed using the method of orthogonal design and the results were analyzed by the fuzzy optimization method. The results show that the disc tooth's drilling effect is the best when the tip diameter is 2 mm, taper angle is 30° and the groove number is 8, and the disc tooth's drilling effect is the second best when the tip diameter is 3 mm, taper angle is 30° and the groove number is 7. The above two combined ways of drilling effect's difference is very small (the difference of the degree of the membership is 0.003).

Keywords

Tooth shape parameters / Rock-breaking experiments / Orthogonal design / Fuzzy analysis

Acknowledgments

The Authors are grateful to Applied basic research project of Sichuan Province (No.2015JY0057) and Natural science project of Sichuan Provincial Education Department (No.15ZA0046) for their financial support to carry out this research. The insightful and constructive comments of the anonymous reviewers are also gratefully acknowledged.

References

[1] Su Yinao, Huang Hongchun, Zhou Yuhui, et al., Oil&gas drilling technology in China: past and present, China Oil Gas 4 (2009) 36-40.

[2] Tan Songcheng, Duan Longchen, Ye Xuefeng, et al.,. Current status and tendency of research on oil bits for hard rock drilling, Geol. Explor. 49 (2) (2013) 373-378.

[3] Rolf Pessier, Michael Damschen. Hybrid Bits Offer Distinct Advantages in Selected Rollercone and Pdcbit Applications[R], SPE, 2010, 128741.

[4] Anton F. Zahradnik. Hybrid drill bits having increased drilling efficiency: U.S. Patent 20130313021[P]. 2013-11-28.

[5] Kuang Yuchun, Wei Lihong, Qin Chao, Research on bottomhole flow field CFD simulation of composite ro11er-PDC bit, China Petrol. Mach. 41 (6) (2013) 6-9.

[6] Kong Chunyan, Liang Zheng, Zhang Derong, et al., Study on geometry and kinematicsofspherical single-roller PDC bit, Adv. Mech. Eng. 8 (12) (2016) 1-8.

[7] Marwa Omar, Waleed Agawani, Atef Abdelhamid, et al., Multiple Deployments of Hybrid Drill Bits with Optimized Drilling Systems Prove Enhanced Efficiency in North Kuwait Development Wells[R], SPE, 2017, 184026.

[8] Deng Rong, An Mei, Tang Dong, Finite element simulation of drilling processes using hybrid bits, J. SW. Petrol. Univ. Sci. Technol. Ed. 39 (2) (2017) 145-152.

[9] Ahmed Ismail, Waleed Moustafa, New Hybrid Drill Bit with Innovative Technology Improves Drilling Efficiency in Challenging Jordanian Drilling Project[R], SPE, 2014, 172169.

[10] Chen Shilin.Hybrid bit with blades and disc: W. OPatent 2015178908[P]. 2015-11-26.

[11] Williams Mark Evans. Hybrid bit with roller cones and discsW.O Patent2015191028[ P]. 2015-12-17.

[12] Kari Rose, Kyle Nobile, Victor Rodriguez, et al., Frac Plug Drill Out Benefits from Hybrid Roller Cone Bit Design[R], SPE, 2015, 173127.