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    • 2. 发明申请
    • METHODS FOR IMPROVING COATINGS ON DOWNHOLE TOOLS
    • 改善下水工具涂层的方法
    • WO2013052290A3
    • 2014-03-13
    • PCT/US2012056580
    • 2012-09-21
    • HALLIBURTON ENERGY SERV INC
    • LIANG FENGTODD BRADLEY LWELTON THOMAS DSAINI RAJESH KUMAR
    • E21B43/08
    • E21B43/08C09D5/008
    • The present invention relates to the use of degradable coatings suitable for use on downhole tools. In particular, the present invention relates to pliable coatings for use on downhole tools that have been designed to be able to resist flaking or breaking off of the tool in response to a physical shock. Some embodiments of the present invention provide methods of reacting lactic acid, glycolic acid, or a combination thereof in a polymerization reaction to form a degradable polymer; combining the degradable polymer and a plasticizer to form a coating composition; applying the coating composition to a downhole tool; placing the coated downhole tool into a portion of a subterranean formation; and, hydrolyzing the degradable polymer of the coating composition to release an acid and degrade the coating.
    • 本发明涉及适用于井下工具的可降解涂料的应用。 特别地,本发明涉及用于井下工具的柔性涂层,其被设计成能够抵抗物理冲击而抵抗工具的剥落或破裂。 本发明的一些实施方案提供了在聚合反应中使乳酸,乙醇酸或其组合反应形成可降解聚合物的方法; 组合可降解聚合物和增塑剂以形成涂料组合物; 将涂料组合物施加到井下工具; 将涂覆的井下工具放置在地层的一部分中; 并且水解涂料组合物的可降解聚合物以释放酸并降解涂层。