| 摘要 |
A method and well tool (10) for using a low-viscosity slurry (22) to gravel pack an interval (12). The well tool (10) is comprised of a conduit which includes a main screen (17) and an upper by-pass screen (18). The tool (10) is lowered into the interval (12) and slurry (22) is pumped into the annulus (23) around the screen (17) whereby fluid from the slurry is lost into the casing perforations (14) while the gravel (25) falls to the bottom of the annulus (23) to form the gravel pack (26). When the gravel (25) rises above the uppermost perforations (14), fluid (24) from the slurry (22) by-passes the gravel pack (26) by flowing into the by-pass screen (18), through a washpipe (21) in the conduit, and out the lower end of the main screen (17) to thereby pack perforations (14) in the casing (13) and to improve the gravel distribution of the gravel pack (26) within the annulus (23)
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