Results 21 to 30 of about 311 (133)

Deepwater Oil-Based Drilling Fluid Systembased on Grey Wolf Optimized BP neural network [PDF]

E3S Web of Conferences, 2022
In this paper, a BP neural network model with 5-9-6 structure is constructed according to various fault gases and different fault types ofWater-based drilling fluid and synthetic-based drilling fluid.
Sui Dianjie, Zhan Mingwang, Sui Dianxue, Zhao Fulei, Yu Qiannan   +4 more
doaj   +1 more source

Propagation characteristics of Doppler ultrasonic wave in gas–liquid two-phase flow in an offshore deepwater riser

Natural Gas Industry B, 2021
During offshore deepwater drilling, the strata with abnormal pressure are often encountered and gas invasion and overflow occur easily. If they cannot be detected and controlled in time, blowout may happen and even get out of control, which will cause ...
Chunwei Gu, Qian Li, Rui Ma, Yingsong Lin, Xiangfang Li, Yiming Li, Aixia Zhang, Yingjie Li, Bangtang Yin   +8 more
doaj   +1 more source

Prediction of gas hydrate formation region in the wellbore of deepwater drilling

Petroleum Exploration and Development, 2008
It is essential to consider the thermodynamics, temperature, and pressure conditions of gas hydrate formation in order to predict the gas hydrate formation region in the wellbore of deepwater drilling.
Zhi-yuan WANG, Bao-jiang SUN, Hai-qing CHENG, Yong-hai GAO   +3 more
doaj   +1 more source

Deepwater PDC Jetting Bit-Drilling Technology Based on Well Structure Slimming

Energies, 2023
Growing global energy demand and limited reserves of traditional energy resources are causing a growing energy shortage. In order to meet future energy needs, new energy resources must be continuously explored.
Weiguo Zhang, Deli Gao, Yijin Zeng, De Yan   +3 more
doaj   +1 more source

Study on Opening Determining and Parameter Optimization of Booster Line for Deepwater Drilling

Shiyou jixie, 2021
During deepwater drilling, when drilling fluid returns from the casing annulus to the riser section, due to the sudden increase of the size of the riser section annulus, the velocity of the drilling fluid decreases and the cutting carrying efficiency ...
Liu Hexing, Li Lei, Dou Liangbin, Zhang Ming, Zhao Kai, Sun Hengbin   +5 more
doaj  

Investigation of jack-up leg extension for deep water operations

International Journal of Naval Architecture and Ocean Engineering, 2015
Since the first jack-up was built, jackups have become the most popular type of mobile offshore drilling unit (MODU) for offshore exploration and development purposes in shallow water.
Yousri M.A. Welaya, Ahmed Elhewy, Mohamed Hegazy   +2 more
doaj   +1 more source

Influence of Auxiliary Pipelines of the Deepwater Drilling Riser on the Dynamic Characteristics of the Subsea Wellhead

Journal of Marine Science and Engineering, 2023
During deepwater drilling, the subsea wellhead will be subjected to dynamic loads transmitted from the marine environment, floating drilling platform, riser, and blowout preventer (BOP).
Jinduo Wang, Yanbin Wang, Deli Gao, Rui Li, Liurui Guo   +4 more
doaj   +1 more source

Refined Assessment on Vortex-induced Fatigue of Deepwater Subsea Wellhead

Shiyou jixie, 2022
Subsea wellhead is the key equipment for deepwater drilling and vortex-induced fatigue failure is prone to occur under the action of ocean current.Present research mainly focuses on the global vortex-induced fatigue analysis of deepwater drilling riser ...
Huang Yi, Liu Shujie, Meng Wenbo, Liu Hexing, Li Lei, Tong Wujun, Liu Xiuquan   +6 more
doaj  

Study on Flow Regulation and Bottom Hole Pressure Control of RMR System under Normal Working Conditions

Shiyou jixie, 2022
For lack of deepwater drilling technology and theory, riseless mud recovery system(RMR)is difficult to meet practical requirements. Therefore, according to the double gradient drilling principle of RMR system, the control equation of bottom hole pressure
Zhang Jie, Wang Zhiheng, Li Xin, Li Cuinan, Li Rongxin, Sun Ruitao   +5 more
doaj  

Zwitterionic Polymer P(AM-DMC-AMPS) as a Low-Molecular-Weight Encapsulator in Deepwater Drilling Fluid

Applied Sciences, 2017
In deepwater oil and gas drilling, the high-molecular-weight encapsulator aggravates the thickening of the drilling fluid at low temperatures. Therefore, it is hard to manage the downhole pressure, and drilling fluid loss occurs.
Xin Zhao, Zhengsong Qiu, Yongjun Zhang, Hanyi Zhong, Weian Huang, Zhichuan Tang   +5 more
doaj   +1 more source