Heat pump cycle viscosity reduction device based on central tube closed heat exchange and use method

By employing a central tube closed-loop heat pump circulation device in oil extraction, combined with heat pump and geothermal technologies, a fully enclosed circulation heat exchange was achieved, solving the problems of high energy consumption and safety hazards in wellbore heating, and improving oil extraction efficiency and economic benefits.

CN122280534BActive Publication Date: 2026-07-28SLOF KANGBEI IND & TRADING
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Patent Information

Application Number
CN202610746386.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-05-28
Publication Date
2026-07-28
Estimated Expiration
2046-05-28

AI Technical Summary

Technical Problem

Existing wellbore heating technology is energy-intensive and poses safety hazards, leading to increased oil extraction costs and safety risks, and the problem of wax blockage is difficult to solve effectively.

Method used

A heat pump circulation device based on a central tube closed-loop heat exchange is adopted, combining heat pump technology and geothermal technology. The heat exchange is carried out in a fully enclosed loop within a hollow sucker rod column through an internal central tube. Geothermal energy is used to reduce energy consumption, and the temperature is further increased through a natural gas heater to avoid blockage.

Benefits of technology

It significantly reduced energy consumption, reduced safety hazards, improved oil extraction efficiency, reduced the number of well workover operations, and increased the production time and economic benefits of producing wells.

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Abstract

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a heat pump circulation viscosity reduction device based on center pipe closed heat exchange and a use method. The technical scheme is that a center pipe heat exchange unit is located in a production oil pipe, and a ground circulation unit is located at one side of a wellhead device; a hollow sucker rod column of the center pipe heat exchange unit is provided with an inner center pipe, a bottom of the inner center pipe is provided with a center pipe bottom head, and a pipe wall of an upper side is provided with more than one center pipe bottom side opening; the beneficial effects are that heat exchange working medium heated by a heat pump is lowered along the inner center pipe to the hollow sucker rod column in a wellbore, and then is raised to a near ground position along the center pipe bottom side opening between the inner center pipe and the hollow sucker rod column, closed heat exchange prevents blockage and circulation, energy consumption is greatly reduced by using the heat pump technology and the geothermal energy, safety is improved, the function of preventing blockage and increasing production is effectively realized, and the number of workover operations is reduced.
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