| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition for excavating a winze, in which under various winze environmental conditions the composition can surely perform winze processing, and can facilitate the removal of downhole tools, and is suitable for forming molded articles for excavating a winze such as downhole tools (members) that contribute to reducing cost of winze excavation and to shortening a process, and has decomposing property in a prescribed environment, and has an excellent strength.SOLUTION: There is provided a molded article for excavating a winze comprising: a reactive metal; and a decomposable resin composition that accelerates a decomposition reaction of the reactive metal, preferably, a decomposable resin composition that contains a decomposable resin that is decomposed to generate an acid, or a decomposable resin composition that contains a decomposable resin and an inorganic material or an organic material that accelerates a decomposition of the reactive metal. There are also provided a molded article for excavating a winze that is a downhole tool or a member for downhole tools, and a method for excavating a winze using the molded article for excavating a winze.SELECTED DRAWING: Figure 1 |
