›› 2012, Vol. 33 ›› Issue (3): 859-863.

• Geotechnical Engineering • Previous Articles     Next Articles

A model for downhole rock drillability prediction under real drilling condition

ZHENG De-shuai1, 2, GAO De-li2, FENG Jiang-peng1   

  1. 1. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China; 2. Key Laboratory of Petroleum Engineering of Ministry of Education, China University of Petroleum, Beijing 102249, China
  • Received:2010-11-04 Online:2012-03-10 Published:2012-03-12

PDF (Chinese)

844

Abstract: Standard drillability test is carried out at atmosphere pressure without considering the effect of confining pressures. The test results mainly reflect the intrinsic characters of rock. Downhole rock is under different stresses and these stresses influence the rock drillability a lot. Based on analysis of rock drillability test, the invasion depth of tooth is an important influential factor on rock drillability. A model for calculation invasion depth is presented considering both rock features and confining pressures, based on Mohr-Coulomb strength criterion. Through comparing rock drillability tested with invasion depth calculation, a close relationship can be built between invasion depth and drillability. Since the invasion depth formula includes the influences of rock features and confining pressures, the rock drillabilty under real drilling condition can be predicted by calculating invasion depth.

Key words: real drilling condition, drillability, rock failure, downhole stress, drilling rate

CLC Number: 

  • TU 452
[1] CHEN Bing-rui, WU Hao, CHI Xiu-wen, LIU Hui, WU Meng-die, YAN Jun-wei, . Real-time recognition algorithm for microseismic signals of rock failure based on STA/LTA and its engineering application [J]. Rock and Soil Mechanics, 2019, 40(9): 3689-3696.
[2] ZHANG Peng-hai, YANG Tian-hong, XU Tao, YU Qing-lei, ZHOU Jing-ren, ZHAO Yong-chuan. The evolution law of acoustic emission events during the fracture process of altered granite gneiss [J]. , 2017, 38(8): 2189-2197.
[3] ZHOU Lei, ZHU Zhe-ming, LIU Bang. Influence of cracks on surrounding rock damage-failure mode of straight wall arch tunnel [J]. , 2017, 38(12): 3688-3697.
[4] LI Shu-cai , CHEN Yun-juan , ZHU Wei-shen , ZHAO Cheng-long , LI Li-ping , YIN Fu-qiang，. Secondary development of elastic brittle constitutive model of discontinuous deformation analysis for rock failure [J]. , 2014, 35(8): 2144-2149.
[5] CHEN Zi-quan，LI Tian-bin，CHEN Guo-qing，ZHANG Hang. Experimental study of acoustic emission characteristics of sandstone under hydro-mechanical coupling action [J]. , 2014, 35(10): 2815-2822.
[6] TIAN Yong，YU Ran-gang. Energy analysis of limestone during triaxial compression under different confining pressures [J]. , 2014, 35(1): 118-122.
[7] CHEN Yun-juan，LI Shu-cai，ZHU Wei-shen，WANG Wen，WANG Jing. A full-column shearing anchor bolt of discontinue deformation analysis for rock failure [J]. , 2014, 35(1): 293-297.
[8] ZHU Xing ，XU Qiang ，TANG Ming-gao ，FU Xiao-min ，ZHOU Jian-bin . Experimental study of infrasound wave generated by typical rock fracture [J]. , 2013, 34(5): 1306-1312.
[9] ZHENG De-shuai, FENG Jiang-peng. Mechanism of effect of downhole pressures on rock failure and its applications [J]. , 2011, 32(S1): 205-208.
[10] XU Fu-le ，WANG En-yuan ，SONG Da-zhao ，SONG Xiao-yan ，WEI Ming-yao. Long-range correlation and multifractal distribution of acoustic emission of coal-rock [J]. , 2011, 32(7): 2111-2116.
[11] SU HUI , DANG Cheng-hua , LI Yan-jun. Study of numerical simulation of acoustic emission in rock of inhomogeneity [J]. , 2011, 32(6): 1886-1890.
[12] SHEN Ming-rong，CHEN Hong-ju. Testing study of long-term strength characteristics of red sandstone [J]. , 2011, 32(11): 3301-3305.
[13] GUO Wen-jing MA Shao-peng KANG Yong-jun MA Qin-wei. Virtual extensometer based on digital speckle correlation method and its application to deformation field evolution of rock specimen [J]. , 2011, 32(10): 3196-3200.
[14] LI Yuan-hui, LIU Jian-po, ZHAO Xing-dong, YANG Yu-jiang. Study on b-value and fractal dimension of acoustic emission during rock failure process [J]. , 2009, 30(9): 2559-2563.
[15] PAN Peng-zhi, FENG Xia-ting, ZHOU Hui. Failure evolution processes of brittle rocks using 3D cellular automaton method [J]. , 2009, 30(5): 1471-1476.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] LI Kui, GAO Bo. Study of construction schemes for metro tunnel crossing river and bridge[J]. , 2010, 31(5): 1509 -1516 .
[2] YANG Bing, YANG Jun, CHANG Zai, GAN Hou-yi, SONG Er-xiang. 3-D granular simulation for compressibility of soil-aggregate mixture[J]. , 2010, 31(5): 1645 -1650 .
[3] CHEN Yu, JIANG Tong, HUANG Zhi-quan, FU Wen-bin. Effect of temperature on mechanical properties of asphalt concrete[J]. , 2010, 31(7): 2192 -2196 .
[4] YE Hai-lin, ZHENG Ying-ren, HUANG Run-qiu, DU Xiu-li, LI An-hong4, XU Jiang-bo. Study of application of strength reduction dynamic analysis method to aseismic design of anti-slide piles for landslide[J]. , 2010, 31(S1): 317 -323 .
[5] Lü Xi-lin，HUANG Mao-song，QIAN Jian-gu. Strength of soils considering the influence of deformation bifurcation under true triaxial condition[J]. , 2011, 32(1): 21 -26 .
[6] WANG Min-sheng，TANG Bo. Effects of stress field in bottom hole on borehole deviation during gas drilling[J]. , 2009, 30(8): 2436 -2441 .
[7] CAO Ping, ZHANG Ke, WANG Yi-xian, LIN Hang. Numerical simulation of failure mechanism of multilayer slope[J]. , 2011, 32(3): 872 -878 .
[8] ZHANG Zhi-pei, PENG Hui, RAO Xiao. Numerical simulation study of grouting diffusion process in soft soil foundation[J]. , 2011, 32(S1): 652 -0655 .
[9] WU Cai-xia , XU Ling , DAI Fu-chu , MIN Hong , Tham, L.G. , Kwong, A.K.L. , ZHOU Yue-feng. Topographic features and initiation of earth flows on Heifangtai loess plateau[J]. , 2011, 32(6): 1767 -1773 .
[10] LIU Gong-xun ，LUAN Mao-tian ，TANG Xiao-wei ，SHAO Qi ，ZHANG Jun-feng. Experimental study of characteristics of residual deformation of undisturbed saturated marine clay under complex stress conditions[J]. , 2011, 32(7): 1931 -1938 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd