Member for hydrocarbon resource collection downhole tool
AssigneeKureha Corporation
InventorsMasayuki OKURA, Hikaru Saijo, Katsumi YOSHIDA, Hiroyuki Sato
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Abstract
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.
Claims27
A downhole tool for hydrocarbon resource recovery,
- consisting of 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.
A downhole tool for hydrocarbon resource recovery having a bar-like entire shape, the tool comprising a connecting member comprising a polyglycolic acid resin, and a plurality of components comprising a material other than polyglycolic acid resin and connected by the connecting member, wherein said connecting member comprises 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.
A downhole tool for hydrocarbon resource recovery having a bar-like entire shape, the tool comprising a connecting member comprising a polyglycolic acid resin, and a plurality of components comprising a material other than polyglycolic acid resin and connected by the connecting member, wherein said connecting member comprises a shaped body of a polyglycolic acid resin having a weight-average molecular weight of at least 70,000 and a weight-basis crystallinity of 30-60%, 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.
Dependencies are inferred from the claim text.