Ocean Engineering Equipment and Technology ›› 2014, Vol. 1 ›› Issue (2): 106-110.

• Orginal Article • Previous Articles     Next Articles

Key Technologies of Relief Wells in Deepwater Drilling

Zheng TIAN1, Jian-liang ZHOU1, Hai-xiong TANG2, Shi-quan JIANG1, Xi-ning HAO1   

  1. 1. CNOOC Research Institute, Beijing 100027, China
    2. CNOOC Ltd.-Shenzhen, Shenzhen, Guangdong 518067, China
  • Received:2014-02-21 Online:2014-03-29 Published:2017-08-12


Deepwater relief wells exhibit characteristics of high risk, high technology, high investment and high social sensitivity. When the well is out of control and the routine rescue measures fail, relief well is regarded as the ultimate rescue means. However, in China, the quantity of relief wells is relatively small, and the deepwater relief well experience is almost blank at present. Based on the research of relief wells at home and abroad, a series of key technologies of deepwater relief well are sorted and analyzed. Several key technologies such as location selection, the trajectory of relief well connected, well control and well abandonment are analyzed. The results provide certain reference for subsequent relief well study.

Key words: deepwater drilling, relief well, trajectory, connecting technology, well control, well abandonment

CLC Number: