Hollw Rod Closed Heat Carrier Circulating Heating Technology For Heavy Oil Thermal Recovery
Hollw Rod Closed Heat Carrier Circulating Heating Technology For Heavy Oil Thermal Recovery
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Product Introduction
Hollow Rod Circulating Heating Device：
          Our company has independently researched and developed patented technology with independent intellectual property rights, which solves the two key problems of oil wellbore heating and high energy consumption during the development of heavy and high-condensate oil fields, and reduces the exploitation cost of heavy and high-condensate oils. It can replace the electric heating recovery process of the wellbore.

 Heating Device → Steel Flat Wire Hose → Hollow Rod Four-Way → Underground Continuous Stainless Steel Insulated Tubing → Buffer Tank → Circulation Pump → Heating Device
Process Flow：

1.Underground continuous stainless steel insulated tubing
The inner and outer tube adopts 316 L stainless steel. High tensile strength, tensile force of up to 9 tons, and multiple recycling. Nominal diameter 25mm, O.D 25mm, Diameter 18mm, Suitable for the diameter 42mm of hollow sucker rod.
Advantages
(1)High temperature tolerance grade. It can reach above 300 ℃ which can better solve the heating problem of heavy oil and super heavy oil wellbore.
(2)Low thermal conductivity and good thermal insulation. The insulating layer between the inner and outer tube is made by filling and vacuuming the high temperature insulating material of aviation. The thermal conductivity of insulated 
tubing is less than 0.02w/m.kat 400 ℃ .
(3)Long service life. The joints at both ends are made of stainless steel, high strength, corrosion resistance.
(4)Light in weight. With a three-layer structure, the density of the high-temperature insulation material filled in the middle is low, so the weight of the insulated tubing is much lighter than that of the stainless steel tube with the same 
thickness.
(5)High circulation and good heating effect. The annular section between the hollow sucker rod and the heat insulated 
tubing is large, so the circulation amount is high.
(6)The single connection method is adopted, which makes the hoisting construction easier.
(7)Ability to work independently. The insulation tube is independent of the hollow sucker rod and only bears its own weight during use, the force is small and not affected by the expansion stress of the hollow sucker rod. The joint is sealed 
with a high-temperature seal ring.
2.Automatic control system
It includes thermometer, pressure transmitter, low water level detection device, and self-control valve. The automatic control system controls the working state and is convenient to manage and meet the needs of field work. The working state 
of the heating device and the circulating pump is controlled by the PLC: automatic alarm when low water level occurs, automatic shutdown when ultra- high temperature occurs, automatic opening when low water temperature occurs, and 
unattended operation can be achieved.
3.Steel flat wire hose
With the function of heat insulation, I.D 25mm, O.D 38.5mm, hydrostatic pressure ≤ 21MPa,pneumatic pressure ≤ 2MPa, temperature range: -20 ℃ to 180 ℃