Abstract: An apparatus for filtering well fluids and method of manufacture is disclosed. The apparatus includes an inner support, a filter helically wrapped around the inner support, and an outer support helically wrapped around the filter. The outer support frictionally engages the filter and encloses the filter between the inner and outer supports. The filter may have offset longitudinal edges which overlap. The filter may be held in place by friction with both the inner and outer supports. The method of manufacturing the apparatus includes helically wrapping a filter medium together with a metal sheet onto an inner support, the metal sheet frictionally engaging the filter medium to retain the filter medium between the metal sheet and the inner support.

Abstract: An apparatus for filtering well fluids and method of manufacture is disclosed. The apparatus comprises an inner support, a filter spirally wrapped around the inner support, and an outer support wrapped around the filter enclosing the filter between the inner and outer supports. The filter has longitudinal edges which overlap and the filter is held in place by friction with the inner and outer supports. The method of manufacturing the apparatus comprises continuously and simultaneously wrapping a filter and outer support around an inner support and disposing the filter between the outer and inner supports.

Abstract: An apparatus for filtering well fluids and method of manufacture is disclosed. The apparatus comprises an inner support, a filter spirally wrapped around the inner support, and an outer support wrapped around the filter enclosing the filter between the inner and outer supports. The filter has longitudinal edges which overlap and the filter is held in place by friction with the inner and outer supports. The method of manufacturing the apparatus comprises continuously and simultaneously wrapping a filter and outer support around an inner support and disposing the filter between the outer and inner supports.