One-trip washdown system

Details One-trip washdown system One-trip washdown system

E - Fixed Constructions

21

B

166/9

E21B 43/04 (2006.01) E21B 33/12 (2006.01)

Patent

CA 2016662

VS 89.138Al Abstract Of The Disclosure Gravel packing systems are disclosed which permit sand fill to be reverse circulated out of a well without tripping the gravel packing system itself out of the well. The gra- vel packing system can be utilized with a sump packer. An outer seal assembly is constructed to be received in a bore of the sump packer. The seal assembly has a seal assembly bore therethrough which receives a lower end of a wash pipe. A wash pipe extension is partially received in the lower end of the seal assembly bore and extends downward below the seal assembly. The wash pipe extension is communicated with the wash pipe. A releasable retaining structure is operably associated with the wash pipe and the wash pipe extension and initially retains the wash pipe in the seal assembly bore. Subsequently, the wash pipe extension is released upon upward movement of the wash pipe. Methods of gravel packing are also disclosed.

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