Intelligent separate production process string and implementation method

By using a smart submersible pumping string with magnetic coupling connection in a small wellbore, power and signal transmission, flexible docking, and online monitoring are achieved. This solves the problems of limited selection and difficulty in lowering electric submersible pumps in existing technologies, and improves pump inspection efficiency and production capacity.

CN119712017BActive Publication Date: 2026-04-21CHINA OILFIELD SERVICES LTD
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Patent Information

Application Number
CN202411923986.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2026-04-21
Estimated Expiration
2044-12-25

AI Technical Summary

Technical Problem

Existing stratified oil production tubing suffers from limitations in small wellbore selection of electric submersible pumps, limited space for cables or hydraulic control lines, high risk of reservoir contamination, and low pump inspection efficiency, especially in 7-inch casing where it is difficult to meet the needs of fluid extraction production.

Method used

A smart production process string suitable for small wellbore was designed, including a sand control string, a production distribution string, and a production string. The upper and lower smart nodes are magnetically coupled to realize the transmission of electrical energy and signals. Through an electrically controlled setting packer and a positioning detection module, in conjunction with a telescopic compensator, flexible docking and online monitoring are achieved.

Benefits of technology

It improves pump inspection efficiency, reduces operating costs, meets the needs of large-volume fluid extraction production, avoids the limitations of electric submersible pump selection, enables long-term power supply and online control and monitoring, and solves the problem of difficulty in running conventional tools in horizontal well sections.

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Abstract

This invention belongs to the field of oil and gas field development technology, and discloses an intelligent production process string and implementation method suitable for small wellbores. The intelligent production process string includes: a sand control string, including a sand control screen located in the open hole section, a sand control top packer located at the front end of the sand control screen, and at least one open hole segment sand control packer for segmenting the open hole section to form multiple sub-open hole sections; a production string, including at least a production distributor located in each sub-open hole section, an electrically controlled setting packer that sets and cooperates with the open hole segment sand control packer and is connected to the adjacent production distributor, a lower intelligent node connected to the foremost production distributor, and a drop tool connected to the lower intelligent node; and a production string, including at least an upper intelligent node and an electric submersible pump connected sequentially from bottom to top. The upper intelligent node is connected to the surface control device via a first steel pipe cable, the production distributor is connected to the lower intelligent node via a second steel pipe cable, and the upper intelligent node is magnetically coupled to the lower intelligent node through the drop tool.
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