针对页岩气钻采中定向钻进的PDC钻头扭矩波动大、冲击振动大、工具面不稳定等问题,笔者提出一种刀翼上设置有双侧支撑的滚轮新结构钻头,通过滚轮单元破岩实验以及全钻头钻进破岩实验来开展新型钻头减扭、缓冲机理研究,主要研究6种滚轮轮廓形状、4种滚轮的吃入深度、6种滚轮径向位置、7种PDC齿相对高度等因素对新型钻头扭矩、钻压的影响规律。结果表明:6种轮廓滚轮的等效摩擦系数均低于PDC齿,且为PDC齿的18.65%~43.73%,得出滚轮减扭能力高于PDC齿; 6种不同径向位置的滚轮缓冲能力均强于PDC齿,为PDC齿的1.59~9.17倍,滚轮式PDC钻头的扭矩为常规PDC钻头的71.72%~98.33%;随着滚轮与PDC齿相对高度的减小,钻头扭矩逐渐减小,滚轮钻压的占比也逐渐增加,钻头减扭能力、缓冲能力均增加,为适用于页岩气钻采的新型钻头产品设计与研制提供理论支撑。
In view of the problems such as large torque fluctuation, large impact vibration and unstable tool surface of PDC bits for directional drilling in shale gas drilling and production, the author proposes a new roller structure bit with bilateral supports on the blade. Through rock breaking experiment of roller unit and rock breaking experiment of full bit drilling, the mechanism of new bit torque reduction and buffering is studied, mainly including 6 roller profile shapes, 4 roller pressing depths, 6 roller radial positions The influence of the relative height of 7 kinds of PDC teeth on the torque and WOB of the new drill bit. The results show that the equivalent friction coefficients of the six contour rollers are lower than those of the PDC teeth, and are 18.65%~43.73% of the PDC teeth; The buffering capacity of roller at six different radial positions is stronger than that of PDC teeth, which is 1.59~9.17 times of that of PDC teeth. The torque of roller PDC bits is 71.72%~98.33% of that of conventional PDC bits; With the reduction of the relative height of the roller and PDC teeth, the bit torque gradually decreases, the proportion of the roller weight on bit also gradually increases, and the bit torque reduction capacity and buffering capacity increase, providing theoretical support for the design and development of new bit products suitable for shale gas drilling and production.
[1]Ford R. Rolling PDC cutter enhances drill bit life in granite wash runs[J].Drilling Contractor, 2014,12(8):57-89.
[2]Hsieh L, Endress A. New drill bits utilize unique cutting structures, cutter element shapes, advanced modeling software to increase ROP, control, durability[J]. IADC SPE,2015,(4/8):66-72.
[3]Niu S W, Zheng H L, Yang Y X, et al. Experimental study on the rock-breaking mechanism of disc-like hybrid bit [J]. Journal of Petroleum Science & Engineering. 2018, 161:541-550.
[4]Huang K L, Yang Y X, Li G, et al.Torsion and vibration reduction mechanism of roller PDC hybrid bit[J]. Journal of Petroleum Science and Engineering, 2022,208:109-113.
[5]Jain J R, Ricks G, Baxter B, et al. A step change in drill-bit technology with self-adjusting polycrystalline-diamond-compact bits[J]. Drilling contractor and Exhibition. IADC. 2015,(7/8):21-31.
[6]左汝强.国际油气井钻头进展概述(三)—PDC钻头发展进程及当今态势(上)[J].探矿工程(岩土掘进工程,2016,43(3):145-176. (Zuo Ruqiang. Overview of international oil and gas well bit progress (III) -development process and current situation of PDC bit (I) [J]. Prospecting Engineering (Geotechnical Excavation Engineering, 2016,43 (3): 145-176. (in Chinese))
[7]高德利.复杂地质条件下深井超深井钻井技术[M].北京:石油工业出版社,2004.(Gao Deli. Deep and ultra deep well drilling technology under complex geological conditions [M]. Beijing: Petroleum Industry Press, 2004(in Chinese))
[8]付建红,杨迎新.复杂油气藏井钻井理论与应用[M].北京:科学出版社,2017. (Fu Jianhong, Yang Yingxin. Drilling theory and application of complex oil and gas reservoirs [M]. Beijing: Science Press, 2017(in Chinese))
[9]Digiovanni A, Stockey D, Fuselier D, et al. Innovative non-planar face PDC cutters demonstrate 21% drilling efficiency improvement in interbedded shales and sand[J]. IADC SPE. Drilling Conference and Exhibition, 2014,(5/8):89-92.
[10]Huang K L, Yang Y X, Sun J, et al. Experimental study on the lab test of annular-grooved polycrystalline diamond compact bit [J]. Experimental Techniques.2021.45(5):587-599.
[11]Huang S S, Gao Q C, Ye X, et al. Experimental study on rock-breaking mechanism of micro-coring PDC bit [J]. Journal of Petroleum Exploration and Production Technology, 2021.146-153.
[12]Yang Y X, Song D D, Huang K L, et al. Study of a new impregnated diamond bit for drilling in complex, highly abrasive formation-sciencedirect [J]. Journal of Petroleum Science and Engineering,2020:187-193.
[13]王云田.滚轮式PDC钻头工作机理及设计方法研究[D].成都:西南石油石油大学,2020. (Wang Yuntian. Research on working mechanism and design method of roller PDC bit [D]. Chengdu: Southwest Petroleum University, 2020. (in chinese))
[14]Scott D. A bit of history: Overcoming early setbacks, PDC bits now drill 90%-plus of worldwide footage[J]. Drilling contractor, IADC, 2015,(7/8):67-72.
[15]Genesis General Purpose PDC Bits[EB/OL].https://www.bakerhughes.com/products-and-services/drilling/drill-bit-systems/pdc-bits/genesis-pdc-bits.[16]CruzerTM Depth-of-Cut Rolling Element Greatly Reduces Curve DrillingTime[EB/OL].http://www.halliburton.com/public/sdbs/sdbs_contents/Case_Histories/web/2017-MKTG-DBS-5857-Cruzer-Case-Study.
[17]Yang Y X, Huang K L, Song D D, et al. The study on tooth failure and fifixation strength of cone bits under high temperature[J]. Engineering Failure Analysis, 2020:212-217.
[18]钟云鹏,杨迎新,于洪波,等.旋转模块式PDC钻头破岩机理研究[J].地下空间与工程学报,2019,15(6):1742-1748. (Zhong Yunpeng, Yang Yingxin, Yu Hongbo, et al. Study on rock breaking mechanism of rotary modular PDC bit [J]. Chinese Journal of Underground Space and Engineering, 2019,15(6):1742-1748. (in chinese))
[19]林兆虎,杨迎新,于洪波,等.屋脊齿破岩效率研究[J]. 地下空间与工程学报,2019,15(增2):751-758. (Lin Zhaohu, Yang Yingxin, Yu Hongbo, et al. Study on rock breaking efficiency of ridge teeth [J]. Chinese Journal of Underground Space and Engineering, 2019,15(Supp.2): 751-758. (in chinese)).
[20]杨迎新,王云田,周春晓,等.微心PDC钻头心部结构优化的实验研究[J]. 地下空间与工程学报, 2021,17(4):1171-1180. (Yang Yingxin, Wang Yuntian, Zhou Chunxiao, et al. Experimental study on the optimization of the core structure of micro center PDC bits [J]. Chinese Journal of Underground Space and Engineering, 2021,17(4): 1171-1180. (in chinese))
[21]黄奎林,杨迎新,周坚.一种定向钻井金刚石钻头[P].中国专利:201710286112.1,2017-04-27. (Huang Kuilin, Yang Yingxin, Zhou Jian. A directional drilling diamond bit [P]. Chinese patent: 201710286112.1,2017-04-27.(in chinese))
[22]黄奎林,杨迎新,周坚.一种混合破岩机构和一种长寿命混合钻头[P].中国专利:201710286929.9,2017-04-27. (Huang Kuilin, Yang Yingxin, Zhou Jian. A mixed rock breaking mechanism and a long life mixed bit [P]. Chinese patent: 201710286929.9,2017-04-27. (in chinese))
[23]黄奎林,杨迎新,周坚,一种复合破岩机构和一种长寿命复合钻头[P].中国专利:201710287527.0, 2017-04-27. (Huang Kuilin, Yang Yingxin, Zhou Jian, a composite rock breaking mechanism and a long-life composite drill [P]. Chinese patent: 201710287527.0, 2017-04-27. (in chinese))
