Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Yongwang Liu"'
Publikováno v:
Actuators, Vol 13, Iss 9, p 344 (2024)
The lower limb exoskeleton (LLE) plays an important role in production activities requiring assistance and load bearing. One of the challenges is to propose a control strategy that can meet the requirements of LLE trajectory tracking in different sce
Externí odkaz:
https://doaj.org/article/ae2ff7c0851a4c6d840ff67811ae0ed8
Publikováno v:
Animals, Vol 13, Iss 22, p 3446 (2023)
(1) Background: Two-dimensional shear wave elastography (2D-SWE) is a non-invasive method widely used in human medicine to assess the extent of liver fibrosis but only rarely applied to veterinary medicine. This study aimed to measure liver stiffness
Externí odkaz:
https://doaj.org/article/6585c9f3de74424d986d2f11e5d6e656
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 8, Pp 2747-2759 (2020)
Abstract It is a promising measure to transmit downhole information by acoustic wave through drill string. However, the transmission distance and quality of acoustic signals in field conditions are still not satisfied because the acoustic frequency s
Externí odkaz:
https://doaj.org/article/72989e42ca014375bb219ec8217ef3b9
Publikováno v:
Frontiers in Earth Science, Vol 9 (2021)
Using various tools to obtain downhole data to reach a precise pore pressure model is an important means to predict overpressure. Most downhole tools are connected to the lower end of drill string and move with it. It is necessary to understand the m
Externí odkaz:
https://doaj.org/article/307a9e92974741508556661fb28f2886
Publikováno v:
Energies, Vol 15, Iss 19, p 7377 (2022)
The oil and gas resources stored in deep strata are an important replacement field of the petroleum industry. Accelerating the exploration and development of deep oil and gas is of great significance to the security of energy strategy. Drilling is th
Externí odkaz:
https://doaj.org/article/75e16f2d102443ed8e29b98fcb804445
Publikováno v:
Energies, Vol 15, Iss 16, p 5767 (2022)
Increasing drilling speed and shortening the well construction period are the goals of the drilling field. The use of downhole speed-up tools has been noted for its advantages such as no additional cost, no change in drilling equipment and no impact
Externí odkaz:
https://doaj.org/article/a954f12950d54f95a76953b5afa21656
Publikováno v:
Applied Sciences, Vol 12, Iss 17, p 8437 (2022)
To study the dynamic tensile mechanical properties of steel polypropylene hybrid fiber reinforced concrete (SP-HFRC) after high temperature, split Hopkinson pressure bar (SHPB) dynamic splitting tests were carried out, and the optimal fiber content c
Externí odkaz:
https://doaj.org/article/aae3c349ac6f4f22bed75dc52844faa9
Autor:
Yucai Shi, Zhixiang Teng, Zhichuan Guan, Jing Bai, Wei Lv, Hualin Liao, Yuqiang Xu, Yongwang Liu
Publikováno v:
Energies, Vol 13, Iss 18, p 4847 (2020)
The RSS has been widely used in directional drilling. In order to enhance wellpath control accuracy and efficiency of the static push-the-bit RSS, a powerful BUR prediction method is reconstructed by coupling a rotary steerable bottom-hole assembly (
Externí odkaz:
https://doaj.org/article/e87f9270948a4f6fac4e6e13993bba29
Publikováno v:
Petroleum Exploration and Development, Vol 41, Iss 5, Pp 678-683 (2014)
To improve the down-hole drilling fluid energy and its utilization efficiency, a drilling string absorption and hydraulic pulsed jet generator was designed, its simulation model was established and simulation analysis was conducted, and its performan
Externí odkaz:
https://doaj.org/article/a119498039534383841247c125796bbd
Publikováno v:
Shock and Vibration, Vol 2016 (2016)
It is a hot topic for deep/ultradeep wells to improve rock-breaking efficiency and drilling speed by available downhole energy. Based on different downhole energies and working conditions, specialized plunger pump is proposed to convert longitudinal
Externí odkaz:
https://doaj.org/article/251d9330f83d42968b9a54bd94412644