The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2016
Filed:
May. 28, 2013
Nippon Steel & Sumikin Engineering Co., Ltd., Tokyo, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Keita Suzumura, Tokyo, JP;
Masayuki Igarashi, Fukuoka, JP;
Akihiro Itoh, Fukuoka, JP;
Akira Kawakami, Tokyo, JP;
Hideki Fujii, Tokyo, JP;
Teruhiko Hayashi, Tokyo, JP;
Kazuhiro Takahashi, Tokyo, JP;
Abstract
Provided is a multiplex pipe and a system for recovering steam from a geothermal well, which are capable of solving all of the various problems with a neutralization pipe prepared by painting or the like of an alkali-resistant coating on the inner face of an acid-resistant single pipe. A multiplex pipethat is configured to recover steam from a geothermal well GT, includes: a casing pipelocated outside; and a duplex pipethat is slidable relative to the casing pipein the casing pipe, and has a first gapwith an inner face of the casing pipe, the duplex pipe including an outer pipehaving acid-resistance and an inner pipehaving alkali-resistance, the outer pipeand the inner pipedefining a second gaptherebetween. An alkali solution is injected to acid hot-water stored in an acid geothermal well GT via a hollowof the inner pipeto neutralize the acid hot-water, and the neutralized hot-water V is allowed to spout to the ground via the first gap, thus recovering flashing steam.