Suspension well completion integrated packer and well completion pipe string

Abstract

The invention provides a suspension well completion integrated packer and a well completion pipe string. The suspension well completion integrated packer comprises a setting mechanism, a tie-back cylinder, a releasing mechanism and a setting mechanism which are coaxially connected; the setting mechanism comprises a setting center pipe, a setting assembly, a first setting cylinder sleeve and a first annular setting piston; the setting mechanism comprises a setting center pipe, a thrust sleeve, a starting shearing fixing piece and a setting sealing assembly; and the releasing mechanism comprises a releasing elastic lock pipe, a releasing lock head, a releasing shearing fixing piece and a releasing assembly. The suspension well completion integrated packer can further comprise a tie-back mechanism; and the tie-back mechanism comprises a tie-back lock sleeve and a tie-back insertion pipe assembly. The setting mechanism of the suspension packer can achieve independent setting, the functions of other tools in the open hole segmented well completion pipe string are not affected, the releasing mechanism is high in compressive strength, and unsetting can be achieved after setting.

Description

technical field [0001] The present disclosure relates to the technical field of manufacturing downhole operation tools in the petroleum and natural gas industry, and specifically relates to an integrated suspension and completion packer and a well completion string used for staged fracturing and acidizing construction of open-hole horizontal wells in oil and gas fields. Background technique [0002] At present, when implementing staged stimulation of horizontal well completion, more stimulation tools are often run in the horizontal section, and suspension packers are run in the vertical well or the well section with less inclination. The frictional resistance is high, so it is necessary to use a rigid drill pipe with a suspension packer to feed in; when the suspension packer suspends the tool string in the horizontal section on the casing, the drill pipe is separated from the suspension packer, and then runs The tubing tie-back tool string is inserted into the tie-back seali...

AI Technical Summary

Problems solved by technology

[0005]1. The existing hanging packer has strong liquid sealing performance and poor gas sealing ability, which cannot meet the requirements of well completion and gas production;

[0006]2. The existing suspension packer cannot realize independent setting in the open hole sectioned pipe string of horizontal wells, so that other tools in the open hole sectioned completion pipe string function is affected;

[0007]3. The low compressive strength of the existing hanging packer internal drop-in device restricts its operation in deep wells with high killing fluid ratio;

[0008]4. The structure of the tie-back fixed sealing device of the existing hanging packer is easy to jam, which is not conducive to air sealing

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