SLIP ON SCREEN WITH EXPANDED BASE PIPE

摘要

The present invention provides a method for manufacturing a wellscreen and a wellscreen that have the mechanical properties of a direct-wrap wellscreen and the precise slot tolerance of a slip-on wellscreen. In one embodiment, a method for manufacturing a wellscreen for use in a wellbore is provided. The method includes disposing a filter subassembly on a base pipe sized so that there is annulus between the base pipe and the filter subassembly. The filter subassembly includes a length of wire wrapped and welded along a plurality of rods so that a slot is defined between adjacent coils of wire. The method further includes expanding the base pipe so that the slot is not substantially altered, thereby substantially reducing or eliminating the annulus.