With the continuous progress of science and technology, drilling well control technology has also achieved rapid development, but the problems faced are still very serious. It is well known that the oil drilling process is a high-risk, high-tech and challenging project. Some low-layer structures are special, which makes drilling face many problems such as shallow gas, natural gas hydrate,...
Russian 
English
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Romaian
Portuguese (Brazil)
Greek
urdu