论文成果

Performances of a Stinger PDC cutter breaking granite: Cutting force and mechanical specific energy in single cutter tests

摘要:The Stinger PDC cutter has high rock-breaking efficiency and excellent impact and wear resistance, which can significantly increase the rate of penetration (ROP) and extend PDC bit life for drilling hard and abrasive formation. The knowledge of force response and mechanical specific energy (MSE) for the Stinger PDC cutter is of great importance for improving the cutter's performance and optimizing the hybrid PDC bit design. In this paper, 87 single cutter tests were conducted on the granite. A new method for precisely obtaining the rock broken volume was proposed. The influences of cutting depth, cutting angle, and cutting speed on cutting force and MSE were analyzed. Besides, a phenomenological cutting force model of the Stinger PDC cutter was established by regression of experimental data. Moreover, the surface topography and fracture morphology of the cutting groove and large size cuttings were measured by a 3D profilometer and a scanning electron microscope (SEM). Finally, the rock-breaking mechanism of the Stinger PDC cutter was illustrated. The results indicated that the cutting depth has the greatest in-fluence on the cutting force and MSE, while the cutting speed has no obvious effects, especially at low cutting speeds. As the increase of cutting depth, the cutting force increases linearly, and MSE reduces with a quadratic polynomial relationship. When the cutting angle raises from 10 degrees to 30 degrees, the cutting force increases linearly, and the MSE firstly decreases and then increases. The optimal cutting angle for breaking rock is approximately 20 degrees. The Stinger PDC cutter breaks granite mainly by high concentrated point loading and tensile failure, which can observably improve the rock breaking efficiency. The key findings of this work will help to reveal the rock-breaking mechanisms and optimize the cutter arrangement for the Stinger PDC cutter.(c) 2022 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

关键字:Stinger PDC cutter; Cutting force; Mechanical specific energy; Single cutter tests

ISSN号:1672-5107

卷、期、页:卷: 20期: 2页: 1087-1103

发表日期:2023-04-01

影响因子:0.000000

期刊分区(SCI为中科院分区):二区

收录情况:SCI(科学引文索引印刷版),CSCD(中国科技引文期刊)(核心),EI(工程索引),SCIE(科学引文索引网络版)

发表期刊名称:PETROLEUM SCIENCE

参与作者:Wu, Gang

通讯作者:陈晗

第一作者:熊超,黄中伟,史怀忠,杨睿月,赫文豪

论文类型:期刊论文

论文概要:熊超,黄中伟,史怀忠,杨睿月,Wu, Gang,陈晗,赫文豪,Performances of a Stinger PDC cutter breaking granite: Cutting force and mechanical specific energy in single cutter tests,PETROLEUM SCIENCE,2023,卷: 20期: 2页: 1087-1103

论文题目:Performances of a Stinger PDC cutter breaking granite: Cutting force and mechanical specific energy in single cutter tests