Inventor
OKURA MASAYUKI
JP19 patents
⚠️ This page may combine multiple inventors who share the name “OKURA MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KUREHA CORP
17 patentsUS9714551B2Jul 25, 2017
Plug for well drilling process provided with mandrel formed from degradable material
KUREHA CORP25 citations94
US10208559B2Feb 19, 2019
Diameter-expandable annular degradable seal member for downhole tool, plug for well drilling, and method for well drilling
KUREHA CORP9 citations84
US9267351B2Feb 23, 2016
Member for hydrocarbon resource collection downhole tool
KUREHA CORP9 citations83
US10738561B2Aug 11, 2020
Stock shape for downhole tool component, downhole tool component, and downhole tool
KUREHA CORP6 citations73
US10619084B2Apr 14, 2020
Plug for well drilling provided with diametrically expandable annular rubber member formed from degradable rubber material
KUREHA CORP5 citations73
US10280699B2May 7, 2019
Degradable rubber member for downhole tools, degradable seal member, degradable protecting member, downhole tool, and method for well drilling
KUREHA CORP4 citations73
US10030465B2Jul 24, 2018
Solidification- and extrusion-molded article of polyglycolic acid and method for manufacturing same
KUREHA CORP3 citations73
US9879500B2Jan 30, 2018
Well treatment method by disintegrating elastic material by contacting seal member for downhole tools comprising elastic material with well treatment fluid
KUREHA CORP2 citations73
US9644453B2May 9, 2017
Ball sealer for hydrocarbon resource collection as well as production method therefor and downhole treatment method using same
KUREHA CORP2 citations73
US9574418B2Feb 21, 2017
Downhole tool member for hydrocarbon resource recovery
KUREHA CORP3 citations72
US7807272B2Oct 5, 2010
Coating solution, and gas barrier film, gas barrier laminate and gas barrier multilayer film, using the coating solution, and their manufacturing methods
KUREHA CORP4 citations58
US10414851B2Sep 17, 2019
Rubber member for downhole tools, downhole tool, and method for recovering hydrocarbon resource
KUREHA CORP0 citations52
US10072476B2Sep 11, 2018
Poly-L-lactic acid solid-state extrusion molded article, method for producing the same, and use applications of the same
KUREHA CORP1 citations52
US9914871B2Mar 13, 2018
Ball sealer for hydrocarbon resource recovery, method for manufacturing same, and method for treating borehole using same
KUREHA CORP1 citations52
US10626694B2Apr 21, 2020
Downhole tool member for hydrocarbon resource recovery
KUREHA CORP0 citations51
US10030464B2Jul 24, 2018
Member for hydrocarbon resource collection downhole tool
KUREHA CORP0 citations51
US9926764B2Mar 27, 2018
Molded product having effective thickness of 1 mm or more and containing aliphatic polyester resin, and downhole tool member for hydrocarbon resource recovery
KUREHA CORP0 citations51