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AssigneesChina Petroleum & Chemical Corporation, Sinopec Oilfield Service Corporation, Sinopec Shengli Petroleum Engineering Co., Ltd, Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd
InventorsJianbin YU, Ye PENG, Zhonghua WU, Shuwei GUAN, Yuchao XU, Dong ZHANG, Weitao WANG, Haixin YU, Yuxin LIU, Jianxiang SUN
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A PDC-roller hybrid drill bit has a bit body and a roller assembly containing a roller arm fixedly connected to the bit body, a roller shaft fixedly connected to the roller arm, a rolling wheel on the roller shaft, and at least one roller tooth arranged along a circumferential direction of the rolling wheel. On oil cavity and an oil passage are arranged in the roller arm. The oil passage is configured such that oil in the oil cavity flows to contact surfaces between the roller shaft and the rolling wheel. Sealing assemblies for sealing the rolling wheel are arranged at both ends of the roller shaft and have a composite sealing ring.
A PDC-roller hybrid drill bit, comprising:
Dependencies are inferred from the claim text.