| 摘要 |
An erosion-resistant sand screen assembly is described for use in petroleum wells of the type in which sand tends to become entrained in the stream of petroleum entering the wellbore. The assembly is especially useful in cased holes in formations which consist of very find sand, such as have been encountered in the Gulf Coast region of the United States and off the east coast of Trinidad. The assembly uses a sleeve with an erosion-resistant wall at least one-fourth inch thick, positioned around the outside layer of wire screen. Preferably, the assembly has an outer surface of a resilient elastomeric material.
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