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:
Sep. 08, 2020
Filed:
Jul. 21, 2016
Japan Agency for Marine-earth Science and Technology, Yokosuka-shi, Kanagawa, JP;
Nlc Co., Ltd., Tokyo, JP;
Yuichi Shimmoto, Yokosuka, JP;
Eigou Miyazaki, Yokosuka, JP;
Keita Akiyama, Yokosuka, JP;
Masaki Kawahara, Hitachi Ohmiya, JP;
Tomoaki Suzuki, Hitachi Ohmiya, JP;
JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY, Yokosuka-shi, JP;
NLC CO., LTD., Tokyo, JP;
Abstract
A concave section such as an extension section, a cutting section, and a notch section is provided to receive a lid of a float valve in an inside of outer tube assembly of a drill string. Thus, when the float valve is provided for the drill string, it is made possible to collect a core with a larger diameter by a thinner drill string, by expanding the inner diameter of the drill string.