Hydraulic releasing packer preventing midway setting and method

Abstract

The invention relates to a hydraulic releasing packer preventing midway setting and a method. According to the technical scheme of the hydraulic releasing packer preventing midway setting, a releasingportion and a stay-well portion are included, and the lower portion of the releasing portion is sleeved with the stay-well portion, and connecting into a whole is achieved through a releasing ring and a center pipe; a releasing thread of the releasing ring is a left hand thread; the exterior of a pressure relief pipe and an inner hole of the center pipe are in sliding seal fit with each other through a sealing O ring; and a lock block and a step hole are in limiting cooperation connection. The hydraulic releasing packer preventing midway setting has the beneficial effects that firstly, an elastic sleeve mechanical self-locking midway setting preventing mechanism solves the midway setting problem caused by the mechanical force; secondly, a double-stage starting pin improves the capacity ofresisting hydraulic pressure causing midway setting; thirdly, a pressure relief pipe sliding seal mechanism achieves oil sleeve annulus hydraulic examining seal; and fourthly, a mechanical back off and hydraulic double releasing mechanism guarantees reliable releasing, the measure reliability is guaranteed from tripping in of the packer to completing of the whole function, the measure success rate of the packer is increased, and the low-grade reservoir development benefits are improved.

Description

technical field [0001] The invention relates to an oil field exploitation equipment and method, in particular to an anti-midway setting hydraulic drop-off packer and method. Background technique [0002] In the process of oil field development, packers are widely used in water injection, oil production, fracturing and acidizing, and Y445 series packers are the most widely used ones. With the continuous development of oil reservoirs, the development of low-grade oil reservoirs has put forward higher requirements for this type of packer. It is required that the tool not only has reliable setting and sealing, but also can be run smoothly under various complex conditions during the running process, and It has the function of casing pressing and sealing inspection. At present, there is no Y445 packer with the above-mentioned performance characteristics. Contents of the invention [0003] The object of the present invention is to aim at the above-mentioned defects existing in t...

AI Technical Summary

Problems solved by technology

With the continuous development of oil reservoirs, the development of low-grade oil reservoirs has put forward higher requirements for this type of packer. It is required that the tool not only has reliable setting and sealing, but also can be run smoothly under various complex conditions during the running process, and It has the function of casing pressing and sealing inspection. At present, there is no Y445 packer with the above performance characteristics

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