Horizontal well subsection gravel pack tool

Abstract

The invention discloses a horizontal well subsection gravel pack tool which comprises a filling cylinder (51), an outer sleeve (52) and an opening-and-closing sliding bushing device (61). One end of the filling cylinder (51) is arranged in one end of the outer sleeve (52) in a sleeved mode, and is fixedly connected with the outer sleeve (52). The opening-and-closing sliding bushing device (61) is arranged between the filling cylinder (51) and the outer sleeve (52) in a sleeved mode, and can move in the axial direction relative to the filling cylinder (51). The phenomenon that a well completion drift diameter is reduced in a step-by-step mode when a plurality of horizontal well subsection gravel pack tools are tripped into a horizontal well cannot happen, the number of stages is not limited, and the effect of gravel pack is better. When subsection well completion has been carried out and sand filling is carried out, only one horizontal well subsection gravel pack tool and only one-time tripping-in of a tubular column need to be tripped into the horizontal well to achieve filling of each subsection, and therefore the horizontal well subsection gravel pack tool is particularly applicable to horizontal well subsection gravel pack sand prevention well completion.

Description

technical field [0001] The invention relates to the field of gravel packing equipment in petroleum production, in particular to a segmented gravel packing tool for horizontal wells. Background technique [0002] Horizontal well gravel packing sand control technology is one of the advanced technologies for horizontal well completion. It has the characteristics of outstanding sand control effect and long effective period of sand control. The application of this technology can effectively prevent oil wells from sanding, especially for fine silt sands, and enable oil wells to effectively exert their production capacity. Therefore, horizontal well gravel packing sand control technology has been widely used in horizontal well completion. [0003] For horizontal wells with long horizontal well sections and horizontal wells completed in stages, the method of gravel packing for sand control is often used in staged gravel packing. The main core tool used in this method is the segmen...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem in the prior art that the internal diameter of the horizontal well segmented gravel packing tool is gradually reduced and the number of segments is small, the present invention provides a horizontal well segmental gravel packing tool, which is lowered into the horizontal well at each stage The structure and size of the staged gravel packing tools for horizontal wells are exactly the same, which will not cause the completion diameter to decrease step by step; Filling in each segment can be realized

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