Device and method for multi-stage layering sand prevention and well completion by one-step pipe column
A technology for pipe strings and sand control pipes, applied in the field of multi-stage layered sand control completion devices for one trip string, can solve the problems of increased risk, small well diameter, and difficulty in unsealing, so as to reduce the risk of later operations , The process operation method is simple, and the sealing effect is guaranteed
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[0032] The following is a detailed description of the one-trip multi-level layered sand control completion device and method of the present invention with reference to the embodiments and the drawings.
[0033] Such as figure 1 As shown, the one-trip multi-stage stratified sand control completion device of the present invention includes an oil layer casing 1 inserted into the first oil layer 8, the second oil layer 9 and the third oil layer 10 in sequence. A blind tube 11 is provided inside, the inner part of the blind tube 11 is provided with an integrated setting and sealing string 2, and the outer side of the blind tube 11 is sheathed with a drop-off suspension packer 3, a first Safety connector 4A, first sand control string 5A, first isolation packer 6A, second safety connector 4B, second sand control string 5B, second isolation packer 6B, third sand control string 5C and support slips 7. Wherein, the upper part of the integrated setting-sealing-sealing-sealing string 2 is co...
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