Title:
DEGRADABLE SEAL MEMBER FOR DOWN-HOLE TOOL, DOWN-HOLE TOOL, AND WELL-DRILLING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/099005
Kind Code:
A1
Abstract:
Provided is a degradable seal member for a down-hole tool, said member being formed from a degradable polymer material that is preferred to be a thermoplastic polymer material or a polymer material including an ester bond, an amide bond, or a urethane bond, and that is further preferred to be a polymer material that contains an aliphatic polyester. It is preferred that the degradable seal member exhibits a bending elastic modulus of 0.01-8GPa at 23℃, further preferred that a stable condition is maintained in a dry environment and that degradation in a fluid of equal to or greater than 66℃ is possible, and also preferred that a formed body has an annular shape. Also provided are a down-hole tool such as a well-drilling plug, and a well-drilling method.
Inventors:
TAKAHASHI TAKEO (JP)
OKURA MASAYUKI (JP)
KOBAYASHI TAKUMA (JP)
OKURA MASAYUKI (JP)
KOBAYASHI TAKUMA (JP)
Application Number:
PCT/JP2014/084231
Publication Date:
July 02, 2015
Filing Date:
December 25, 2014
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
E21B43/26; C08L67/02; C08L67/04; C08L101/00; E21C37/06
Foreign References:
| US20050205266A1 | 2005-09-22 | |||
| JP2011256221A | 2011-12-22 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK et al. (JP)
Patent business corporation HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation HARAKENZO WORLD PATENT & TRADEMARK (JP)
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