Patents by Inventor Masaki Kawahara

Masaki Kawahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Float valve sub
    Patent number: 10767446
    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.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: September 8, 2020
    Assignees: JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY, NLC CO., LTD.
    Inventors: Yuichi Shimmoto, Eigou Miyazaki, Keita Akiyama, Masaki Kawahara, Tomoaki Suzuki
  • FLOAT VALVE SUB
    Publication number: 20180209245
    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.
    Type: Application
    Filed: July 21, 2016
    Publication date: July 26, 2018
    Applicants: JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY, NLC CO., LTD.
    Inventors: Yuichi SHIMMOTO, Eigou MIYAZAKI, Keita AKIYAMA, Masaki KAWAHARA, Tomoaki SUZUKI
  • Crustal core sampler and method of coring crustal core sample using the same
    Patent number: 7124841
    Abstract: Disclosed herein are a crustal core sampler, by which a crustal core sample can be cored in a state coated with a flow-able coating material free of any contamination, and a method of coring a core sample using this crustal core sampler. The crustal core sampler comprises a drilling mechanism and a barrel, wherein the barrel is equipped with a flow-able coating material-ejecting mechanism, and a columnar crustal core portion is coated with a flow-able coating material. Alternatively, the crustal core sampler is constructed by a drill pipe and an inner barrel, wherein the inner barrel is equipped with an inner barrel body, a core elevator, a channel-forming member for forming a flow-able coating material-running channel and flow-able coating material-ejecting openings, and a columnar crustal core portion is coated with a flow-able coating material.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 24, 2006
    Assignees: Independent Administrative Institution Japan Agency for Marine-Earth Science & Technology, NLC Co., Ltd.
    Inventors: Kazuyasu Wada, Yusuke Yano, Tomoya Inoue, Masanori Kyo, Masaki Kawahara
  • Crustal core sampler and method of coring crustal core sample using the same
    Publication number: 20040256151
    Abstract: Disclosed herein are a crustal core sampler, by which a crustal core sample can be cored in a state coated with a flow-able coating material free of any contamination, and a method of coring a core sample using this crustal core sampler. The crustal core sampler comprises a drilling mechanism and a barrel, wherein the barrel is equipped with a flow-able coating material-ejecting mechanism, and a columnar crustal core portion is coated with a flow-able coating material. Alternatively, the crustal core sampler is constructed by a drill pipe and an inner barrel, wherein the inner barrel is equipped with an inner barrel body, a core elevator, a channel-forming member for forming a flow-able coating material-running channel and flow-able coating material-ejecting openings, and a columnar crustal core portion is coated with a flow-able coating material.
    Type: Application
    Filed: April 30, 2004
    Publication date: December 23, 2004
    Applicants: Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology, N L C Co., Ltd.
    Inventors: Kazuyasu Wada, Yusuke Yano, Tomoya Inoue, Masanori Kyo, Masaki Kawahara