The system can save insulating cost and reduce heat loss using heat-exchanger in well bore and casing heat-exchanger on surface.
该系统采用采水井内换热器和地面套管式换热器，既可节省保温费用，又可减少散热损失。
A reasonable mechanical design of the main die body was given on the basis of considering every determining factors such as the bore hole condition (casing or not).
并根据井眼条件(有无套管)等方面因素，对打捞主体的机械结构进行了合理设计。
Meanwhile, underground cycle temperature is also related to the pressure balance in a well, the stability of well bore and the design of casing and string.
同时它还与井内压力平衡，井壁稳定，套管和钻柱强度设计密切相关。
Meanwhile, underground cycle temperature is also related to the pressure balance in a well, the stability of well bore and the design of casing and string.
同时它还与井内压力平衡，井壁稳定，套管和钻柱强度设计密切相关。
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