Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Lei Wannian"'
Publikováno v:
E3S Web of Conferences, Vol 257, p 03076 (2021)
According to the characteristics of high efficiency and high hole forming rate of the triangular-shaped drill pipe in the process of drilling in soft outburst coal seam, the slag discharge model of annular gap between the triangular-shaped drill pipe
Externí odkaz:
https://doaj.org/article/586a7f19ba6f4687b31f52e8ec57e798
Autor:
Nazir, M.S., Aziz, H.A., Tang, Dayong, Tang, Yi, Duan, Zhengyong, Lei, Wannian, He, Xiaolong, Zhang, Fubing
Publikováno v:
E3S Web of Conferences; 5/12/2021, Vol. 257, p1-10, 10p
Publikováno v:
Journal of Physics: Conference Series. 1314:012115
According to the requirements of the directional drilling, the Φ89*3000 type directional drill pipe with high strength and large through hole is designed. The pre-tightening force and axial force acting on the threaded joint of the drill pipe are an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f50bf276a21bda3f217575e8e89b680
https://doi.org/10.1088/1742-6596/1314/1/012115
https://doi.org/10.1088/1742-6596/1314/1/012115
Publikováno v:
Journal of Physics: Conference Series; 2019, Vol. 1314 Issue 1, p1-1, 1p