Invention Grant
- Patent Title: Diameter-expandable annular degradable seal member for downhole tool, plug for well drilling, and method for well drilling
-
Application No.: US15037506Application Date: 2014-12-24
-
Publication No.: US10208559B2Publication Date: 2019-02-19
- Inventor: Takeo Takahashi , Masayuki Okura
- Applicant: Kureha Corporation
- Applicant Address: JP Tokyo
- Assignee: KUREHA CORPORATION
- Current Assignee: KUREHA CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-271310 20131227; JP2014-127561 20140620
- International Application: PCT/JP2014/084045 WO 20141224
- International Announcement: WO2015/098913 WO 20150702
- Main IPC: E21B33/128
- IPC: E21B33/128 ; E21B33/12 ; C09J167/00 ; E21B43/26 ; C09K8/42
Abstract:
A degradable seal member for downhole tools, the member being a diameter-expandable annular seal member, the diameter-expandable annular seal member comprising: two or more annular members distributed along an axial direction, the annular members being formed from a degradable polymer material having hardness in a range from A60 to D80; a plug for well drilling; and a method for well drilling using the degradable seal member for downhole tools.
Public/Granted literature
Information query
