Mitsubishi Jukogyo Kabushiki Kaisha

Osaka Gas Company Limited

Asahi Glass Company, Limited

Yoshiaki Ikuta

Masato Kaneko

Masayuki Moriwaki

Ken Ebihara

Hisazi Matsui

Toshiyuki Uno

The present invention is directed to a method for drawing up a special crude oil which is characterized by comprising the steps of extracting and separating a gas oil from a crude oil containing a great deal of wax or a high-viscosity crude oil which has been drawn up through an oil well, and drawing up the crude oil containing a great deal of wax or the high-viscosity crude oil, while injecting a part of the thus separated gas oil into the oil well. For the extraction and separation of the gas oil, a recycle oil is employed.

Method for drawing up special crude oil

The present invention relates to a method for drawing up a crude oil containing a great amount of wax or a high-viscosity crude oil. The method of the present invention is characterized by cracking or fractionating the crude oil which has been drawn up, in order to prepare a cracked oil or a gas oil, and by drawing up the crude oil, while injecting a part of the cracked oil or the gas oil into an oil well. According to the present invention, an efficient drawing operation can be achieved.

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Tokyo, Japan

Yoshiaki Ikuta