发明名称 |
Member for hydrocarbon resource collection downhole tool |
摘要 |
A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin having a weight average molecular weight of at least 70,000, having an effective thickness which is ½ or more of a critical thickness of surface decomposition, and exhibiting a thickness reduction rate in water which is constant with respect to time. As a result, it has become possible to more accurately design the strength and time up to the collapse of the downhole tool member which forms the whole or a part of a downhole tool for developing or repairing downholes for recovery of hydrocarbon resources, such as oil and gas. |
申请公布号 |
US9267351(B2) |
申请公布日期 |
2016.02.23 |
申请号 |
US201314395654 |
申请日期 |
2013.04.12 |
申请人 |
KUREHA CORPORATION |
发明人 |
Okura Masayuki;Saijo Hikaru;Yoshida Katsumi;Sato Hiroyuki |
分类号 |
E21B23/00;E21B33/12;E21B23/14;E21B23/04 |
主分类号 |
E21B23/00 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A downhole tool member for hydrocarbon resource recovery, comprising a shaped body of a polyglycolic acid resin having a weight-average molecular weight of at least 70,000, having an effective thickness which is ½ or more of a critical thickness of surface decomposition, and exhibiting a constant thickness reduction rate in water with respect to time. |
地址 |
Tokyo JP |