Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter
When the PDC bit is used to drill conglomerate formations， the frequent impact loads reduce the expected life of PDC cutter， leading to frequent bit changes and ultimately affecting drilling efficiency. Special-shaped cutter can change the impact situation on the cutter surface， so choosing an impac...
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| Format: | Article |
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Editorial Office of China Petroleum Machinery
2025-06-01
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| Series: | Shiyou jixie |
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| Online Access: | http://www.syjxzz.com.cn/en/#/digest?ArticleID=4962 |
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| author | Shi Jiangang Li Gensheng Liu Weiji Wu Desheng Zhang Nan Deng Kaichuang |
| author_facet | Shi Jiangang Li Gensheng Liu Weiji Wu Desheng Zhang Nan Deng Kaichuang |
| author_sort | Shi Jiangang |
| collection | DOAJ |
| description | When the PDC bit is used to drill conglomerate formations， the frequent impact loads reduce the expected life of PDC cutter， leading to frequent bit changes and ultimately affecting drilling efficiency. Special-shaped cutter can change the impact situation on the cutter surface， so choosing an impact-resistant cutter surface is one of the effective methods to deal with such formations. To study the performance of PDC cutter with different structures in cutting conglomerate， the conglomerate cores taken from deep formation of the Junggar Basin were selected for analysis. Based on a finite element model of heterogeneous conglomerate， the parameters of the conglomerate model were calibrated through uniaxial compression test， and rock cutting and breaking simulation of special-shaped cutter was carried out. Moreover， the cutting effects of 12 types of PDC cutters were discussed under the same rake angle and cutting depth， and the cutting force fluctuation and rock-breaking specific energy of them were compared. The study results show that although the average cutting forces of axe-shaped cutter and three-plane cutter are relatively large， the overall fluctuations are more stable. The cutting force fluctuations of planar cutter， concave cutter， convex cutter and hyperboloidal cutter are relatively large， and the cutter surfaces are subjected to significant impact. The rock-breaking specific energy determines the rock breaking efficiency of the cutter， by means of comparing the values， the rock-breaking specific energy of hyperboloidal cutter is the smallest， while that of wedge-shaped cutter is the largest. Without considering the rigidity of PDC cutter， by means of comparing cutting force fluctuation and rock-breaking specific energy， the axe-shaped cutter and three-plane cutter are the better choices among all types of PDC cutters. The study results provide some reference for the cutter shape selection of PDC bit when drilling conglomerate formations. |
| format | Article |
| id | doaj-art-4f74f557c84344f4b8eda9d4b228c786 |
| institution | Kabale University |
| issn | 1001-4578 |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Editorial Office of China Petroleum Machinery |
| record_format | Article |
| series | Shiyou jixie |
| spelling | doaj-art-4f74f557c84344f4b8eda9d4b228c7862025-08-20T03:50:26ZzhoEditorial Office of China Petroleum MachineryShiyou jixie1001-45782025-06-01536445110.12473/CPM.2024060491001-4578（2025）06-0044-08Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC CutterShi Jiangang0Li Gensheng1Liu Weiji2Wu Desheng3Zhang Nan4Deng Kaichuang5College of Petroleum Engineering， China University of Petroleum（Beijing）College of Petroleum Engineering， China University of Petroleum（Beijing）Sch⁃ool of Mechanical Engineering， Southwest Petroleum UniversityPetroChina Xinjiang Oilfield CompanyPetroChina Xinjiang Oilfield CompanySch⁃ool of Mechanical Engineering， Southwest Petroleum UniversityWhen the PDC bit is used to drill conglomerate formations， the frequent impact loads reduce the expected life of PDC cutter， leading to frequent bit changes and ultimately affecting drilling efficiency. Special-shaped cutter can change the impact situation on the cutter surface， so choosing an impact-resistant cutter surface is one of the effective methods to deal with such formations. To study the performance of PDC cutter with different structures in cutting conglomerate， the conglomerate cores taken from deep formation of the Junggar Basin were selected for analysis. Based on a finite element model of heterogeneous conglomerate， the parameters of the conglomerate model were calibrated through uniaxial compression test， and rock cutting and breaking simulation of special-shaped cutter was carried out. Moreover， the cutting effects of 12 types of PDC cutters were discussed under the same rake angle and cutting depth， and the cutting force fluctuation and rock-breaking specific energy of them were compared. The study results show that although the average cutting forces of axe-shaped cutter and three-plane cutter are relatively large， the overall fluctuations are more stable. The cutting force fluctuations of planar cutter， concave cutter， convex cutter and hyperboloidal cutter are relatively large， and the cutter surfaces are subjected to significant impact. The rock-breaking specific energy determines the rock breaking efficiency of the cutter， by means of comparing the values， the rock-breaking specific energy of hyperboloidal cutter is the smallest， while that of wedge-shaped cutter is the largest. Without considering the rigidity of PDC cutter， by means of comparing cutting force fluctuation and rock-breaking specific energy， the axe-shaped cutter and three-plane cutter are the better choices among all types of PDC cutters. The study results provide some reference for the cutter shape selection of PDC bit when drilling conglomerate formations.http://www.syjxzz.com.cn/en/#/digest?ArticleID=4962heterogeneous conglomeratespecical⁃shaped pdc cutterrock cutting and breaking simulationfinite elementcutting forcerock⁃breaking specific energy |
| spellingShingle | Shi Jiangang Li Gensheng Liu Weiji Wu Desheng Zhang Nan Deng Kaichuang Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter Shiyou jixie heterogeneous conglomerate specical⁃shaped pdc cutter rock cutting and breaking simulation finite element cutting force rock⁃breaking specific energy |
| title | Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter |
| title_full | Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter |
| title_fullStr | Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter |
| title_full_unstemmed | Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter |
| title_short | Numerical Simulation on Cutting and Breaking of Heterogeneous Conglomerate by Special-Shaped PDC Cutter |
| title_sort | numerical simulation on cutting and breaking of heterogeneous conglomerate by special shaped pdc cutter |
| topic | heterogeneous conglomerate specical⁃shaped pdc cutter rock cutting and breaking simulation finite element cutting force rock⁃breaking specific energy |
| url | http://www.syjxzz.com.cn/en/#/digest?ArticleID=4962 |
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