One-piece dissolvable bridge plug

Abstract

The invention discloses an integrated soluble bridge plug, which relates to the technical field of oil wells, and specifically relates to an integrated soluble bridge plug, which includes a right end pipe, and a fixed ring is fixedly installed on the left side of the right end pipe, and the fixed ring The interior of the fixed groove is provided with a fixed groove, and the inside of the fixed groove is movably installed with a fixed piece. The left side of the ring is fixedly connected with a left end pipe. The one-piece dissolvable bridge plug has an inner sealing liquid tube movably socketed inside the left end tube, and the left end of the inner sealing liquid spring is connected with the inner sealing liquid spring, so that the left side of the inner sealing liquid spring is connected with a sealing liquid sheet, Make the diameter of the liquid sealing sheet larger than the diameter of the baffle. When in use, the liquid flowing from the left side of the liquid pipe will push the liquid sealing sheet to the right, so that the liquid sealing sheet and the baffle are closed to achieve sealing. The role of the liquid tube is to seal the liquid and avoid the unstable movement of the soluble ball.

Description

technical field [0001] The invention relates to the technical field of oil wells, in particular to an integrated soluble bridge plug. Background technique [0002] The role of the bridge plug is to seal the oil and gas well, which has the characteristics of less construction procedures, short cycle time and accurate sealing position. It is divided into two types: permanent bridge plug and removable bridge plug. It is transported to the predetermined position of the wellbore by cables or pipe strings, the pressure generated by gunpowder blasting, hydraulic setting or mechanical setting tools acts on the upper slips, the pulling force acts on the tension rods, and the upper and lower cones are applied to the sealing rubber cylinder. Compression pulls two forces, and when the tension reaches a certain value, the tension rod breaks, and the setting tool is separated from the bridge plug. At this time, the locking device on the center tube of the bridge plug works, the upper and...

AI Technical Summary

Problems solved by technology

[0003] There are some problems in the use of the existing soluble bridge plugs. First of all, the existing bridge plugs are usually sealed with soluble balls during use. After the bridge plugs are placed in a suitable position, through When the soluble ball is lowered, it is difficult to ensure that the soluble ball can move to the front section of the bridge plug during the process of lowering the soluble ball. The soluble ball may get stuck in the blasting gap in the front section of the bridge plug. There are also some risks that the fixed part may be firm, resulting in poor use of the bridge plug. For this reason, we propose an integrated soluble bridge plug

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