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    • 5. 发明申请
    • PROCESS FOR ADHERING A LINER TO THE SURFACE OF A PIPE BY INDUCTION HEATING
    • 通过感应加热对管道表面进行排水的方法
    • WO2007050664A1
    • 2007-05-03
    • PCT/US2006/041587
    • 2006-10-25
    • E.I. DU PONT DE NEMOURS AND COMPANYCRANE RESISTOFLEXFARNSWORTH, Kimberly, DawnMCKEEN, Laurence, WainoHOFFMAN, William, Isaac
    • FARNSWORTH, Kimberly, DawnMCKEEN, Laurence, WainoHOFFMAN, William, Isaac
    • F16L58/10F16L55/165
    • F16L55/1652B29C63/34C09J5/06C09J2427/00F16L55/165F16L55/1656F16L58/1036
    • The present invention relates to a process for adhering a preformed polymer liner to the surface of a pipe by induction heating the pipe. The liner may comprise a fluoropolymer. The liner may be applied either to the interior surface or the exterior surface of the pipe. The invention is particularly useful for adhering a liner to the interior surface of an oil well pipe. Thus with the induction heating process of present invention, it is possible to adhere a preformed liner to the interior surface of an oil well pipe which is capable of reducing-to-eliminating the deposition (buildup) of one or more of the asphaltenes, paraffin wax, and inorganic scale on the interior surface of the oil pipe. Preferably, this reduction is at least 40%, preferably at least 50% or more, for at least one of these materials as compared to the unlined oil pipe, and more preferably at least 40% for all of them. In one preferred embodiment of the process, the peel strength of the preformed liner adhered to the surface of the pipe is at least ten pounds force per inch (10 lbf/ in). In other preferred embodiments of the process, either a primer or an adhesive aid is used in adhering the preformed liner to the surface of the pipe.
    • 本发明涉及通过感应加热管道将预制聚合物衬里粘附到管表面上的方法。 衬里可以包含含氟聚合物。 衬垫可以施加到管的内表面或外表面。 本发明对于将衬套粘附到油井管的内表面是特别有用的。 因此,通过本发明的感应加热方法,可以将预成型的衬垫粘附到油井管的内表面,该油井管能够减少 - 消除一种或多种沥青质,石蜡的沉积(积聚) 蜡和无机垢在油管的内表面上。 优选地,对于这些材料中的至少一种,与无衬里油管相比,该还原为至少40%,优选至少50%或更多,更优选至少40%。 在该方法的一个优选实施方案中,预先形成的衬垫粘附到管表面的剥离强度至少为每英寸10磅力(10lbf / in)。 在该方法的其它优选实施方案中,使用底漆或粘合助剂将预制的衬垫粘合到管的表面。