Sand control screen pipe with welded-on filtering blocks and preparation method for sand control screen pipe with welded-on filtering blocks

Abstract

The invention discloses a sand control screen pipe with welded-on filtering blocks and a preparation method for the sand control screen pipe with the welded-on filtering blocks. The sand control screen pipe comprises a base pipe and the plurality of filtering blocks; the outer side of the pipe wall of the base pipe is provided with a plurality of oval stepped grooves, and bottoms of the oval stepped grooves are provided with through holes communicated with the interior of the base pipe; the filtering blocks and the oval stepped grooves are identical in shape, and the filtering blocks are inserted into the oval stepped grooves in one-to-one correspondence; fitting surfaces of the filtering blocks and the oval stepped grooves are welded into a whole. The sand control screen pipe has the advantages that the inner diameter and the outer diameter of the sand control screen pipe are identical to those of the base pipe to make it convenient for descending into a horizontal well; the filtering blocks and the base pipe are welded into a whole to guarantee integral strength and reliability of the pipe.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a sand control screen pipe embedded with welding filter blocks and a preparation method thereof. Background technique [0002] In the process of oil and gas exploitation in unconsolidated sandstone reservoirs, there is generally the problem of formation sand production. Formation sand is brought into the wellbore or ground equipment along with oil, gas and water, which brings troubles to production. In order to prevent sand production in oil and gas wells, it is necessary to use sand control screens that can effectively filter oil, gas and water. [0003] Sand control screens commonly used in the prior art can be roughly divided into two structural types: [0004] One is the structure that the filter sleeve is set outside the base pipe. There are many types of filter sleeves, including wire wound filter sleeves, punched filter sleeves, composite me...

AI Technical Summary

Problems solved by technology

One of their common characteristics is that the outer diameter and inner diameter of the screen are the same as that of the base pipe, and it is easy to run into the horizontal well, but the problem is that the filtering area is limited, and at the same time, due to the downhole corrosion environment, the width of the slotted screen changes and the inset The block falling problem of the block screen

The threaded connection is used between the filter block and the through hole of the base pipe in the existing block-type screen, and the corrosion of the thread of the base pipe will directly cause the filter block to fall off and the sand control to fail

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