Integrated soluble bridge plug

Abstract

The invention discloses an integrated soluble bridge plug, and relates to the technical field of oil wells, in particular to an integrated soluble bridge plug. The integrated soluble bridge plug comprises a right end pipe, wherein a fixing ring is fixedly mounted on the left side of the right end pipe, a fixing groove is formed in the fixing ring, and a fixing piece is movably mounted in the fixing groove; an inner cavity of the fixing ring is fixedly sleeved with the fixing ring, the inner cavity of the fixing ring is movably sleeved with a pushing cone, and the left side of the fixing ring is fixedly connected with a left end pipe. According to the integrated soluble bridge plug, an inner liquid sealing pipe is movably sleeved into the left end pipe, and the left end of an inner liquid sealing spring is connected with an inner liquid sealing spring, so that the left side of the inner liquid sealing spring is connected with a liquid sealing piece, and the diameter value of the liquid sealing piece is larger than that of a blocking piece; when the integrated soluble bridge plug is used, liquid flowing from the left side of a liquid passing pipe pushes the liquid sealing piece rightwards, so that the liquid sealing piece and the blocking piece are closed, then the function of sealing the liquid passing pipe is achieved, the liquid sealing effect is achieved, and unstable movement of a soluble ball is avoided.

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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