Phone: +86-15030811699

Circular Heating Device - Application of Double Hollow Sucker Rod


Circular heating device is a closed-circuit circulation system which can transmit thermal energy for crude oil through circularly heating medium. This device is designed for viscosity reduction. There are various kinds of heat source can be used, such as associated gas, solar energy, bio oil, biofuel, coal, electricity, industrial waste heat and so on. In the device, the associated gas biofuels and solar energy are the two major heat sources for using.

A plan of double hollow sucker rod circular heating device.

Double hollow sucker rod circular heating device.

Structural composition

Circular heating device is mainly consist of solar thermal collector, automatic heating furnace, automatic temperature controller, electromagnetic auxiliary heating coil, circulating pump, ground input tube, double hollow sucker rod, hollow sucker rod below pump, annulus oil well pump, hollow sucker rod above pump, four way hanging connector and ground return line.

Operating principle

Circular media is heated by the automatic heating device and then pressurized by the circulating pump and then pass through the buffer tank, four-way hanging connector to enter the inner channel of the double hollow sucker rod. Driven by the high pressure of circulating pump, the media will flow into the bottom, of the inner channel and then pass through the annulus of inner channel and outer channel to return the heating furnace on the ground for circular heating.


Specifications of double hollow sucker rod

Item Diameter of Outer Pipe Diameter of Inner Pipe
DHSR-01 36mm 16mm
DHSR-02 42mm 22mm
DHSR-03 42mm 19mm


  • Closed circulation system. Media in the outer channel of the double hollow sucker rod will return the top line and then return the ground through four-way hanging connector. At last the media will enter the heat exchanger to form a close circulation system.
  • Eliminate environmental pollution. This device is sealed. Circular media will not contact with the crude oil and air, which can prevent the loss and leakage of the hot media. Additional, it can eliminate the environmental pollution.
  • Will not pollute the crude oil. The hot media will not contact the crude oil, it will not affect the calculation, transport and treatment of the crude oil.
  • Low energy consumption. It can save the operation cost.
  • High efficiency.
  • Various heat source for choice.


  • The circular heating device is a high efficiency device in oil exploitation of high pour point, high viscosity and high wax content.
  • The circular heating device is available for various heat source, the most popular media are solar energy and associated gas biofuels.

Inquiry for Our Product

Hengshui Haiwang Oil Thermal Recovery Equipment Co., Ltd.

When you contact us, please provide your detail requirements.
That will help us give you a valid quotation.

Full Name *
Country Code * + Phone Number *
Message *