Sand control well completion tubular column

Abstract

The invention discloses a sand control well completion tubular column, and belongs to the technical field of oil and gas exploitation. The well completion tubular column comprises an original oil wellcasing, a tail tube hanger, a coupling-free casing section, a well cementation closing sleeve, a cement blocking piece and a coupling-free screen tube section; the tail tube hanger is hung in the original oil well casing and is internally provided with a casing touching-pressing rubber plug; the coupling-free casing section is connected to the tail tube hanger and formed by connecting a pluralityof casings which are connected through threads; the well cementation closing sleeve is connected into the coupling-free casing section, can achieve opening and closing on the coupling-free casing section, and can communicate the interior of the coupling-free casing section with the space between the well wall and the coupling-free casing; and the cement blocking piece is arranged on the coupling-free casing section in a sleeving mode, the coupling-free screen tube section is connected to the lower end of the coupling-free casing section, and the coupling-free screen tube section and the coupling-free casing section are connected through threads. According to the sand control well completion tubular column, the inner diameter of the well completion tubular column can be ensured so that later production, well stimulation and workover operation can be implemented.

Description

Technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a sand control completion pipe string. Background technique [0002] For oil wells with sidetracking and liner reinforcement after major repairs, if sand production occurs in the original well, secondary sand control operations are required. The prior art generally adopts the liner reinforcement and completion of the well before the sand control construction. The biggest disadvantages of the above operation are: 1. The operation and construction cost is high; 2. The casing of Φ177.8mm (7″) can be hung up to Φ139 .7mm (51 / 2″) liner completion, sand control in the Φ139.7mm (51 / 2″) liner will reduce the drainage area and reduce the oil well output; 3. After sand control operations, the casing will be damaged. The inner diameter is reduced, which makes it impossible to run large-diameter tools, which limits the implementation of later production, stimulation measures and...

AI Technical Summary

Problems solved by technology

In the prior art, sand control construction is generally carried out after the liner reinforcement is completed first. The biggest disadvantages of the above operation are: 1. The operation and construction cost is high; .7mm (51 / 2″) liner completion, sand control in the Φ139.7mm (51 / 2″) liner will reduce the drainage area and reduce oil well production; 3. After the sand control operation, the casing will The inner diameter is reduced, so that the large-diameter measure tools cannot be run in, which limits the implementation of post-production, stimulation measures and workover operations

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