Challenges and Practice of Key Technologies for Ultra-Deepwater Drilling with Very Narrow Pressure Window in South China Sea

2020 ◽  
Author(s):  
Dongsheng Xu ◽  
Jin Yang ◽  
Hexing Liu ◽  
Ximo Qu ◽  
Furong Yang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deepwater Drilling ◽  
China Sea ◽  
Key Technologies

ASDD Technology in Deepwater Drilling and Its Process of Commercialization

2010 ◽  
Author(s):  
Yong-feng Guo ◽  
Shao-jun Ji ◽  
Chang-quan Tang
Keyword(s):  
South China Sea ◽  
South China ◽  
Water Depth ◽  
New Technology ◽  
Large Trial ◽  
Great Success ◽  
Deepwater Drilling ◽  
China Sea ◽  
A Company

The paper had discussed on a new technology and equipment in deepwater engineering, ASDD (Artificial Seabed Deepwater Drilling), and its process of commercialization in COSL of China. The concept of ASDD had put forwarded by a Norway engineer in 1993, and COSL had introduced it to China since 2004 from Europe, which has been built the cooperation with a company from Norway to develop ASDD not only the technology but also equipment. The advantages of ASDD is both reduce cost of drilling in deepwater and use common semi submersible to replace of expensive platform in deepwater drilling until water depth of 1500 m. A series of tests and simulations had been done both abroad and domestic by COSL and two large trial operations had been gone in South China Sea between 2008 and 2009. The trial well operation had been completed in Apr. of 2009, and COSL dispatched many huge vessels, including to Nanhai V, which is one of the hugest semi submersible in Aria, and AHVs that power is over 10,000 HP, such as Nanhai 212, Nanhai 213, Nanhai 216 and so on. The trial well had taken great success. It is obvious that COSL intend to carry out process of commercialization for ASDD, and the two commercial wells had been planed to drill in South China Sea in 2010.

Key Technologies and Practice of Ultra-HTHP Drilling in South China Sea

2019 ◽  
Author(s):  
Dongsheng Xu ◽  
Jin Yang ◽  
Ying Zhao ◽  
Yi Huang ◽  
Ming Luo ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
China Sea ◽  
Key Technologies

Experience on Deepwater Drilling Riser about Hang-off Modes in Typhoon Condition of South China Sea

2016 ◽  
Author(s):  
Sheng Leixiang ◽  
Xu Liangbin ◽  
Zhou Jianliang ◽  
Jiang Shiquan ◽  
Li Xunke
Keyword(s):  
South China Sea ◽  
South China ◽  
Deepwater Drilling ◽  
China Sea

Challenges and Solutions for Deepwater Drilling in the South China Sea

2013 ◽  
Author(s):  
Liangbin Xu ◽  
Jianliang Zhou ◽  
Zhengli LIU ◽  
Shiquan Jiang
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
Deepwater Drilling ◽  
China Sea

Experimental Verification Analysis of Propane Pre-Cooling and Dual Nitrogen Expansion Liquefaction Process Adaptable for Floating Liquid Natural Gas (FLNG) in South China Sea Deep Water Gas Field

2016 ◽  
Author(s):  
Xichong Yu ◽  
Bin Xie ◽  
Yuxing Li ◽  
Yan Li ◽  
Qing Wang ◽  
...  
Keyword(s):  
Intellectual Property ◽  
South China Sea ◽  
Property Rights ◽  
Intellectual Property Rights ◽  
South China ◽  
Gas Field ◽  
China Sea ◽  
Key Technologies ◽  
Liquefaction Process ◽  
Cold Box

Liquefaction process is one of the key technologies of offshore FLNG device and is charged by a few of the company’s patent protection. Due to the special offshore operating environment, the choice of FLNG liquefaction process is different from that of onshore. It is very important that FLNG liquefaction process suitable for the marine environment and the oil and gas properties of the South China Sea. In this paper, the static and dynamic performance of propane pre-cooling and dual nitrogen expansion liquefaction process with independent intellectual property rights have been verified by experiment loop simulation with small scale 2000m3/d and middle scale 20000m3/d. Dynamic simulation experimental measures for liquefying key devices such as cold box placed on the swing experiment platform and propane separation tank and the cold box between difference of liquid level changes, are used to verify offshore adaptability of the liquefaction process. Through the static experiments of a small experimental loop with the scale of 2000m3/d simulation considers the liquefaction rate of 93%, energy consumption 0.42kw.h/m3; Dynamic experimental results through the cold box placed on the swinging platform shows that the heat transfer performance of cold box is not affected when FLNG hull roll wave reached 3.6 degrees. The mid-scale experimental simulation of 20000m3/d show that the liquefaction process has the advantages of simple debugging process, convenient operation, quick shutdown and restart, flexible operation, good adaptability to offshore operating parameters, and can realize 3 sets of refrigeration cycles simulation. The propane pre-cooling and dual nitrogen expansion liquefaction process with independent intellectual property rights through the static and dynamic experiments of small and middle scale experimental loop, is verified to the characteristics of high liquefaction rate, low energy consumption and good offshore adaptability. The liquefaction process with independent intellectual property rights can be used to as one of FLNG facility key technologies to develop offshore gas field and faraway from onshore of the South China Sea.

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