Straddle packer capable of rapidly switching construction technology

By using a cross-section packer that allows for rapid switching of construction processes, it is possible to perform additional fracturing and repeated perforation of new holes in different sections during a single trip-in and trip-out process. This solves the problems of long operation cycles and high costs in existing technologies, and improves construction efficiency and the ability to perform refined modifications.

CN121047518AActive Publication Date: 2025-12-02CHINA NAT PETROLEUM CORP +1
View PDF 7 Cites 0 Cited by

Patent Information

Application Number
CN202410682477.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-05-29
Publication Date
2025-12-02
Estimated Expiration
2044-05-29

AI Technical Summary

Technical Problem

Existing production well revamp tools cannot complete new hole injection and repeated fracturing of different layers in a single tripping operation, resulting in long operation cycles, high costs, low construction efficiency, and adverse effects on non-target layers.

Method used

The cross-block packer, which adopts a rapid switching construction process, includes a spray gun, a liner sleeve, a balance valve, and a locking assembly. It enables rapid switching between perforation and fracturing processes by lifting and pressing the coiled tubing, and utilizes the expansion and setting function of the packer sleeve to achieve precise isolation and modification of the formation.

Benefits of technology

By completing the re-perforation and repeated fracturing operations in different sections during a single tripping operation, construction efficiency was improved, costs were reduced, and construction risks were decreased, enabling refined and efficient transformation of each section of the production well.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121047518A_ABST
    Figure CN121047518A_ABST
Patent Text Reader

Abstract

The invention relates to the technical field of oil and gas field development, in particular to a straddle packer capable of quickly switching construction processes, which comprises a spray gun, a liner tube sliding sleeve, a balance valve and a locking assembly, the spray gun and a sand blower are vertically sleeved on the outer side of the liner tube sliding sleeve at intervals, and a packer and an anchor are sequentially and fixedly mounted at the upper end of the sand blower from bottom to top. A plurality of radial through spray holes are formed in the outer side of the upper part of the spray gun at intervals. According to the straddle packer capable of rapidly switching the construction technology, the straddle type packer and the packing rubber sleeve combination can effectively isolate non-operation layer sections, the construction technology can be rapidly switched through lifting and descending operation in the one-time tripping process, the construction technology can be rapidly switched in the one-time tripping process, and the construction efficiency is improved. And new hole reinjection and repeated fracturing operation of different layer sections are completed, refined and differentiated development and efficient transformation are conducted on all the layer sections of the production well in a targeted mode, and the method has the advantages of being short in operation period, low in cost and small in construction risk.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Positive and negative circulation internal blowout preventer

    CN211058759U

  • Disjointing controllable multi-layer fracturing tubular pile device of sandblaster and method for controlling disjointing

    CN101173607A

  • Packer packing multi-layer hydropower abrasive perforating and fracturing integrated technique

    CN101270639A

  • Sand jet perforation annular mechanical packing multilayer fracturing tool pipe column and modification process

    CN102562019A

  • Multistage fracturing tool pipe column of continuous oil pipe and construction method

    CN104563998A