公开(公告)号：EP0668960A1

公开(公告)日：1995-08-30

申请号：EP94915747.0

申请日：1993-11-01

申请人： NAGAOKA INTERNATIONAL CORPORATION ,  SPARLIN, Derry D. ,  NAGAOKA, Tadayoshi

发明人： SPARLIN, Derry D., Int.Completion Consultants, Inc ,  NAGAOKA, Tadayoshi, 2-2-91, Mokuzaidouri

IPC分类号： E03B3 ,  B09C1 ,  E21B43

CPC分类号： B09C1/00 ,  E21B43/088

摘要： A well liner (16) having a selective isolation screen with a limited or less restrictive seal. The well liner (16) includes an elongate base (2) pipe having openings (5) therethrough; surrounded by circumferentially spaced, longitudinal extending spacer bars (3) for forming an inner annulus (7); one or more annular cylindrical sleeves (4) secured to the exterior of the base pipe (2); and a continuous wire wrapping (6) surround the spacer bars (3) except at interrupted areas where the isolated permeable seal sections (10) are placed. The continuous wire wrapping (6) and spacer bars (3) are inverted within the permeable seal sections (10) so that the wire wrapping 6) subtantially fills the inner annulus (9) and a multitude of spacer bars spaced approximately equal to or slightly larger than the spaces between the wire wrapping form the outer most surface of the seal sections (10). The ends of the seal sections (10) are coupled to the wire wrapping (6) screen of the well liner for forming a continuous screen surface and seal.