To address the problem of premature failure of PDC drill bit due to low rock-breaking efficiency and lateral vibrations and swirls of drill string caused by lateral force surge when drilling in soft and hard interbedded layer,a PDC drill bit with directional double-tooth structure was designed,and the effects of the directional double-tooth structure with different tooth arrangement parameters on rock-breaking efficiency and local lateral force balance were investigated by the finite element simulation of double-tooth cutting. The results show that the directional double-tooth structure can effectively improve the rock-breaking efficiency,the double-tooth spacing has less effect on the mechanical specific power,compared with the single-tooth cutting,the mechanical specific power is reduced by about 5.60%-6.50%; the double-tooth clamping angle can significantly affect the mechanical specific power,when the double-tooth clamping angle is 160 °,compared with the single-tooth cutting,the mechanical specific power is reduced by about 96.36%-113.82%; under the same side turning angle,the lateral force of the double-tooth clamping angle tooth arrangement is reduced by about 33.40%-74.20% compared with that of the single-tooth cutting,which can effectively improve the local lateral force balance of the drill bit in the transitional formation and directional drilling,and thus improve the overall force balance effect of the drill bit. This study can provide a reference and basis for the optimized design of the tooth arrangement of the PDC drill bit.
[1] 曾义金.深层页岩气开发工程技术进展[J].石油科学通报,2019,4(3):233-241.
ZENG Yijin.Progress in engineering technologies for the development of deep shale gas[J].Petroleum Science Bulletin,2019,4(3):233-241.
[2] 汪海阁,葛云华,石林.深井超深井钻完井技术现状、挑战和“十三五”发展方向[J].天然气工业,2017,37(4):1-8.
WANG Haige,GE Yunhua,SHI Lin.Technologies in deep and ultra-deep well drilling:present status,challenges and future trend in the 13th Five-Year Plan period (2016-2020)[J].Natural Gas Industry,2017,37(4):1-8.
[3] 张晴,任重阳,张然舜,等.基于文献计量特征的我国深层页岩研究进展及趋势(2012—2022)[J].非常规油气,2023,10(1):21-26.
ZHANG Qing,REN Chongyang,ZHANG Ranshun,et al.Progress and trends of China's deep shale gas research based on bibliometric analysis(2012—2022)[J].Unconventional Oil & Gas,2023,10(1):21-26.
[4] 王晓彦,樊思成,田东彬,等.复杂地层定向井聚晶金刚石复合片钻头设计[J].设备管理与维修,2019,40(3):118-119.
WANG Xiaoyan,FAN Sicheng,TIAN Dongbin,et al.Design of polycrystalline diamond composite bits for directional wells in complex formations[J].Plant Maintenance Engineering,2019,40(3):118-119.
[5] 孙明光,张云连,马德坤.适合多夹层地层PDC钻头设计及应用[J].石油学报,2001,22(5):95-99.
SUN Mingguang,ZHANG Yunlian,MA Dekun.Design and application of the PDC bit suited for multi-interbedded formation[J].Acta Petrolei Sinica,2001,22(5):95-99.
[6] 贾佳,冯雷,夏忠跃.临兴区块小井眼井钻头优化设计[J].非常规油气,2021,8(4):120-126.
JIA Jia,FENG Lei,XIA Zhongyue.The bit optimization design of slim hole in Linxing Block[J].Unconventional Oil & Gas,2021,8(4):120-126.
[7] WARREN M Thomas,BRETT J Ford,SINOR L Allen.Development of a whirl-resistant bit[J].SPE Drilling Engineering,1990,5(4):267-275.
[8] BEHR S M,WARREN M Thomas,SINOR L Allen,et al.3D PDC bit model predicts higher cutter loads[J].SPE Drill & Completion,1993,8(4):253-258.
[9] GLOWKA D A.Use of single-cutter data in the analysis of PDC bit designs:part 1-development of a PDC cutting force model[J].Journal of Petroleum Technology,1989,41(8):797-799,844-849.
[10] CHEN Shilin,ARFELE Rob,ANDERLE Seth,et al.A new theory on cutter layout for improving PDC-bit performance in hard and transit formation drilling[J].SPE Drilling & Completion,2013,28(4):338-349.
[11] AZAR Michael,WHITE Allen,SEGAL Steven,et al.Pointing towards improved PDC bit performance:innovative conical shaped polycrystalline diamond element achieves higher ROP and total footage[C].SPE163521,2013:1-10.
[12] 杨迎新,胡浩然,黄奎林,等.环脊式PDC钻头破岩机理实验研究[J].地下空间与工程学报,2019,15(5):1451-1460.
YANG Yingxin,HU Haoran,HUANG Kuilin,et al.Experimental research on the rock-breaking mechanism of annular-ridge PDC Bit[J].Chinese Journal of Underground Space and Engineering,2019,15(5):1451-1460.
[13] TEASDALE Paul,JOHN Gareth,DAVIS Ron,et al.Innovative dual-diameter PDC bit design provides unique solution to successful drilling of challenging volcanic interval[C].SPE168006,2014:1-9.
[14] CHEATHAM B John,Daniels W H.A study of factors influencing the drillability of shales:single-cutter experiments with stratapax(T) drill blanks[J].Journal of Energy Resources Technology,1979,101(3):189-195.
[15] CHEN Pengju,MENG Meng,MISKA Setfan,et al.Study on integrated effect of PDC double cutters[J].Journal of Petroleum Science and Engineering,2019,178:1128-1142.
[16] CHENG Zhen,SHENG Mao,LI Genshen,et al.Cracks imaging in linear cutting tests with a PDC cutter:characteristics and development sequence of cracks in the rock[J].Journal of Petroleum Science and Engineering,2019,179:1151-1158.
[17] 赵润琦,陈振良,史怀忠,等.斧形PDC齿破碎致密硬质砂岩特性数值模拟研究[J].石油机械,2021,49(10):8-16.
ZHAO Runqi,CHEN Zhenliang,SHI Huaizhong,et al.Numerical simulation study on characteristics of tight hard sand broken by axe-shaped PDC cutter[J].China Petroleum Machinery,2021,49(10):8-16.
[18] 邹德永,陈雅辉,赵方圆,等.斧形PDC齿破岩规律数值模拟研究[J].特种油气藏,2021,28(6):137-143.
ZOU Deyong,CHEN Yahui,ZHAO Fangyuan,et al.Study on rock breaking rules of axe-shaped PDC cutter with numerical simulation[J].Special Oil & Gas Reservoirs,2021,28(6):137-143.
[19] 刘笑傲,邹德永,王庆,等.基于离散元法的砾岩地层三棱齿切削破岩数值模拟[J].特种油气藏,2022,29(4):149-155.
LIU Xiaoao,ZOU Deyong,WANG Qing,et al.Numerical simulation of rock breaking by triangular prismatic cutter in conglomerate formation based on discrete element method[J].Special Oil & Gas Reservoirs,2022,29(4):149-155.
