Novel packer

Abstract

The invention discloses a novel packer. The novel packer is installed in a sleeve and comprises an upper center pipe, the outer side of the upper center pipe is sequentially sleeved with an upper rubber cylinder driving ring and an upper rubber cylinder from top to bottom, a connecting thread is arranged on the outer side of the bottom end of the upper center pipe, a lower center pipe is connected to the outer side of the bottom end of the upper center pipe through the connecting thread, the outer side of the lower center pipe is sequentially sleeved with a lower rubber cylinder driving ring and a lower rubber cylinder from top to bottom, a connecting thread is arranged on the outer side of the bottom end of the lower center pipe, a lower connector is connected to the outer side of the bottom end of the lower center pipe through the connecting thread, a connecting thread is arranged on the outer side of the bottom end of the lower connector, and a lower plug is connected to the outer side of the bottom end of the lower connector through the connecting thread. According to the novel packer, two or more sets of independent working rubber cylinders are adopted, each set of rubber cylinders does not share one power source part any more and is independently matched with a special power assembly, two sets of rubber cylinder setting sets with the targeted performance and the different performance under power cooperation are formed, and the setting requirement of a deep well under the high pressure can be met.

Description

technical field [0001] The invention relates to downhole fracturing tools for oil and gas wells, in particular to a novel packer. Background technique [0002] The packer is a widely used downhole tool, among which the commonly used packers for fracturing and acidizing are K344 packer and Y211 packer. With the change of process requirements, its shortcomings are becoming more and more obvious, and it is difficult to adapt to more complex construction processes. K344 needs throttling to set, and it also needs to keep throttling during construction, resulting in energy waste. Because it will be unsealed after the pump is stopped, it cannot be used at the same time for more careful qualification verification of wellheads, casings, and tool strings; after the Y211 tool is set, it can be used for careful qualification verification of wellheads, casings, and tool strings , but it needs to be unsealed by mechanical action. In well conditions with severe sand spit in the formation...

AI Technical Summary

Problems solved by technology

[0002] The packer is a widely used downhole tool, among which the commonly used packers for fracturing and acidizing are K344 packer and Y211 packer. With the change of process requirements, its shortcomings are becoming more and more obvious, and it is difficult to adapt to more complex construction processes

K344 needs throttling to set, and throttling also needs to be maintained during construction, resulting in energy waste

Because it will be unsealed after the pump is stopped, it cannot be used at the same time for more careful qualification verification of wellheads, casings, and tool strings; after the Y211 tool is set, it can be used for careful qualification verification of wellheads, casings, and tool strings , but it needs to be unsealed by mechanical action. In the well conditions with severe sand spit in the formation, the interference to the mechanical part is obvious, and it is easy to cause sand sticking, which poses a greater safety risk

[0003] Existing packers often use a combination of a power chamber and a rubber cartridge or a combination of three rubber cartridges. This single power component corresponds to a single setting rubber cartridge assembly. Once the rubber cartridge is partially fatigued or damaged, the rubber cartridge The group will be damaged as a whole and fail immediately, especially during the construction process, with great safety hazards and short service life, and it is extremely unsuitable for the higher pressure resistance requirements in more and more deep well fracturing

Images