Downhole tool or member thereof containing polyglycolic acid
AssigneeKureha Corporation
InventorsTakuma Kobayashi, Takahiro Suga
Life of this patent
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Abstract
This technique is capable of suppressing reduction in thickness of a downhole tool or a component thereof in a well at a high temperature. The downhole tool or a component has a resin composition including: 50 parts by mass or more and 97 parts by mass or less of polyglycolic acid; 3 parts by mass or more and 50 parts by mass or less of polybutylene terephthalate; and 2 parts by mass or more and 15 parts by mass or less of a cyclic carbodiimide compound with respect to 100 parts by mass of a total amount of the polyglycolic acid and the polybutylene terephthalate.
Claims12
A downhole tool or a component thereof, comprising a resin molded article formed by molding a resin composition as a raw material, the resin composition comprising:
- 50 parts by mass or more and 97 parts by mass or less of polyglycolic acid;
- 3 parts by mass or more and 50 parts by mass or less of polybutylene terephthalate;
- and
- 2 parts by mass or more and 15 parts by mass or less of a cyclic carbodiimide compound with respect to 100 parts by mass of a total amount of the polyglycolic acid and the polybutylene terephthalate, wherein a thickness reduction rate of the resin molded article in 80° C. water is less than 60 μm/hr.
Dependencies are inferred from the claim text.