| 摘要 |
A well screen for placement within wells used to filter out impurities from the fluid entering the well. In the preferred embodiment, the well screen comprises a spirally-wound wire forming a cylinder with gaps between the layers of wire. The layers of wire are attached by spacers placed within the gaps and on the surfaces of the wire such that the spacers do not extend radially beyond the inner and outer edges of the wire. The outer edge of the spacer can be flush or slightly recessed from the outer edge of the wire to create greater open area for which fluid can flow through. The inner edge of the spacer can also be flush or slightly recessed from the outer edge of the wire. In the alternate embodiment, the well screen comprises a plurality of rings stacked atop each other and connected together by spacers located at intervals around the circumference of the rings. The spacers are attached to the wire or rings by a secure means such as welding which results in a single unitized screen that is structurally rigid. The spacer/ring configuration allows greater open area on the screen which increases fluid flow and efficiency through the screen.
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