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Keywords: strength criteriaClose
Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-097
... the influence of different peak strength criteria. 1 INTRODUCTION The occurrence of mechanical instabilities, which can result in complete or partial collapse of wellbores, remains a continuing problem in the drilling of deep petroleum boreholes. Instabilities may occur during or shortly after drilling...
Paper presented at the ISRM International Symposium, May 26–28, 1982
Paper Number: ISRM-IS-1982-055
... 2.4. In the classification of rock inclination, it is called an "inclined state" when the angle of slope of the rock is above 15°, and a "flat state" when below 15°. reservoir geomechanics cavern karst cavern cross-section classification Institute strength criteria Reservoir...
Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-004
...Proceedings of the International Symposium on Weak Rock / Tokyo /21 -24 September 1981 Shear failure mechanism and strength criteria of a dislocated mudded intercalation LIN WEPING Yangtze Water Conservancy & Hydro -electric Power Research Institute, Wuhan, China 1 INTRODUCTION The foundation rock...
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