Experimental investigation on the breakage of hard rock by the PDC cutters with combined action modes |
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| Authors: | X. B. Li D. A. Summers G. Rupert P. Santi |
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| Affiliation: | 1. Institute of Mining and Rock Engineering, Central South University, Changsha, Hunan, 410083, PR China;2. Rock Mechanics and Explosives Research Center, University of Missouri-Rolla, Rolla, MO 65401, USA;1. Faculty of Engineering, Environment, and Computing, Coventry University, Coventry, UK;2. Faculty of Materials and Chemical Engineering, Department of Materials Science, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi 23640, Pakistan;3. Advanced Materials and Surface Engineering (AMSE) Research Centre, Manchester Metropolitan University, Chester Street, M1 5GD, UK;1. Deep Exploration Technologies Cooperative Research Centre DET CRC, Export Park, Adelaide Airport, SA 5950, Australia;2. School of Civil, Environmental & Mining Engineering, The University of Adelaide, SA 5005, Australia;1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing, 102249, China;2. CNPC Engineering Technology R&D Co., Ltd., Beijing, 102206, China |
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| Abstract: | To verify the feasibility and efficiency of rotary-percussive drilling assisted by waterjets in very hard rocks, experiments on the performance of polycrystalline diamond compact (PDC) cutters resisting different combined loads of static thrust, impact, cutting and waterjets on Missouri red granite and Halston limestone were investigated. The experiments were conducted by means of a drop hammer and linear cutting-impact table. The effects of static thrust (WOB), impact energy, impact spacing and waterjets on the rate of penetration in hard rocks are described and the results are analyzed by measuring the depth of the craters or cuts penetrated by PDC cutters. Results from the study confirmed that the combined mode of cutting-impact is very effective in very hard rocks. |
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| Keywords: | Impact-cutting tests of rock Combined loads Water jets PDC cutters |
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