Swelling type screen pipe suspension method and swelling type screen pipe hanger

Abstract

A circulation sieve tube well completion method is applied in the sieve tube completion of an oil-gas well. The method is characterized as follows: A. a sieve tube well completion string is put down into a well; B. drilling fluid is injected; C. balls are thrown to build the pressure, and an expansion sieve tube suspender is set; D. balls are thrown to build the pressure, and a passage between a drill strings and a sieve tube cluster is got through; E. drilling fluid is injected to wash the interior wall of the sieve tube cluster; F. the sieve tube completion string is got out and the circulation sieve tube well completion work is completed. The effect of the method is that the circulation sieve tube well completion method can realize the well completion by suspending the sieve tube, and break through the traditional practice of sieve tube suspending construction. In the construction course, the drilling fluid can be circulated at any time to reduce the damage to an oil layer to the minimum and promote the oil layer penetration rate recovery value and the recovery rate to the maximum extent when the well is drilled. Compared with a conventional sieve tube well completion method, the well completion by suspending circulation sieve tube can be finished just by putting down the construction string once, which promotes the well completion efficiency and saves the construction cost.

Description

technical field [0001] The patent of the present invention relates to an oil and gas well completion method, in particular to a well completion method of downhole screens, more specifically to an expansion type screen suspension completion method and an expansion type screen hanger. Background technique [0002] The use of screen completion can improve the sand control ability of oil and gas wells and prolong the workover period of oil and gas wells. At present, more and more oil and gas fields at home and abroad adopt the screen hanging completion method. The conventional screen hanging completion method is to connect the screen string to the lower end of the feeding pipe string, put the screen string to the bottom of the well; then hang the screen seat on the lower end of the inner wall of the casing; Throw away the screen string; lift it up and send it into the pipe string; drill down again, drill the blind plate inside the screen string, and clean the inner wall of the ...

AI Technical Summary

Problems solved by technology

There are following deficiencies: when the screen string is running into the well, the circulation cannot be established, and the screen string and the bottom hole cannot be cleaned circularly. The mud, aggravated the pollution...

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