Expansion compression type packer

Abstract

The invention provides an expansion compression type packer which comprises a sleeve and a packer center tube, a throttler and a check valve which are arranged in the sleeve. The throttler is arranged at the top end of the packer center tube; the check valve is arranged at the bottom end of the packer center tube; and an expansion rubber barrel, a compression rubber barrel, a retractable bracket and a compression rubber barrel bracket are sequentially arranged outside the packer center tube between the throttler and the check valve from top to bottom. A compression hydraulic cylinder of a compression type packer is saved; by additionally arranging the retractable steel sheet bracket, the rubber barrels are prevented from entering an annulus to form the jamming of a drilling tool after being compressed and deformed, the safety and the reliability of resisting the high temperature and the high pressure are improved, and the expansion compression type packer has low cost and high construction efficiency.

Description

technical field [0001] The invention belongs to the fracturing construction operation technology in the field of petroleum and natural gas development, and in particular relates to a packer, especially an expansion-compression packer. Background technique [0002] Hydraulic fracturing technology is a necessary technology for oil and gas layer stimulation, and hydraulic expansion or hydraulic compression packer is the key technology for fracturing and layered fracturing. With the continuous deepening of exploration and development, the depth of oil and gas layers is getting deeper and deeper, and the pressure difference and temperature that the packer bears are getting bigger and bigger, and the technical performance and requirements for the packer are also getting higher and higher. As the design and processing technology of the packer become more and more complex, the cost of use is several times or even dozens of times that of the original packer, and the performance canno...

AI Technical Summary

Problems solved by technology

With the continuous deepening of exploration and development, the depth of oil and gas layers is getting deeper and deeper, and the pressure difference and temperature that the packer bears are getting bigger and bigger, and the technical performance and requirements for the packer are also getting higher and higher. As the design and processing technology of the packer become more and more complex, the cost of use is several times or even dozens of times that of the original packer, and the performance cannot fully meet the requirements of the construction process. The splitting way never stops

[0003] The currently used packers are pressure differential packers. According to their setting principle, there are two types of expansion packers and hydraulic cylinder compression packers. According to the field application, the expansion type rubber sleeve is easy to operate. Set, relatively easier to unseal. Compression packers are not easy to set and unseal. Expandable rubber cartridges are better in field applications. However, in deep wells below 3,500 meters, expandable rubber cartridges are High temperature, easy to crush

Compression packers are relatively easy to set but less easy to unseal

[0004] In order to solve the above problems, these two packers have carried out complex designs and tests on the basis of improving the temperature and pressure resistance of the packers according to their respective working principles, and have achieved certain results, but the cost of popularization and application is very high. Increased construction costs and reduced work efficiency

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