Electric heating sucker rod made of hollow sucker rod

Abstract

The electric heating sucker rod comprises a sucker rod body, an electric heating core body is installed in the sucker rod body, the electric heating core body is composed of a heating piece, a supporting plate and an internal electric wire, plugging layers are arranged at the two ends of the sucker rod body, and one end of a cable is connected into each plugging layer. The hollow sucker rod is manufactured by utilizing the existing hollow sucker rod or the hollow sucker rod short section, additional machining is not needed, the battery cell is finished according to the specified length indoors, then is put into the hollow, is filled with the heat-conducting insulating material and is sealed, and the hollow sucker rod has the advantages of simple structure, tight sealing, good insulating property and rapidness in installation.

Description

Technical Field

[0001] The invention relates to the technical field of oil production equipment, in particular to an electrically heated sucker rod made of a hollow sucker rod. Background Art

[0002] In the production of oil field pumping wells, the extraction process of heavy oil and high-viscosity oil is different from that of ordinary crude oil. During extraction, it is necessary to heat the crude oil in the wellbore through technical means to reduce the viscosity of the crude oil and increase its fluidity.

[0003] In the existing technology, some of these electrically heated sucker rods have built-in electric heating tapes or ceramic heaters, which are good for efficiently heating crude oil. Therefore, based on existing materials, electrically heated sucker rods made of hollow sucker rods or hollow sucker rod short sections provide a new option for the extraction of heavy oil and high-viscosity oil. Summary of the Invention

[0004] The purpose of the present invention is to provide an electrically heated sucker rod made of a hollow sucker rod to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an electrically heated sucker rod made of a hollow sucker rod, comprising a sucker rod body, an electric heating core installed in the sucker rod body, the electric heating core consisting of a heating plate, a support plate and internal wires, sealing layers are provided at both ends of the sucker rod body, and one end of a cable is connected to the sealing layer.

[0006] Preferably, the gap between the sucker rod body and the electric heating core is filled with a heat-conducting insulating material, and the heat-conducting insulating material includes aluminum nitride powder, boron nitride powder, and aluminum oxide powder.

[0007] Preferably, the internal wires of the electric heating core are covered with a high-temperature resistant heat-insulating material and buried in the heat-conductive insulating material.

[0008] Preferably, the heating plate is fixed on the support plate and connected to the internal wires, and the heating plate is a ceramic tungsten wire heating plate.

[0009] Preferably, the sucker rod body is connected to the oil pump via a sucker rod thread.

[0010] Preferably, the sealing layer is made of epoxy resin.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] It is made of ready-made hollow sucker rods or hollow sucker rod short sections, without the need for additional mechanical processing. After the battery core is completed to the specified length indoors, it is placed in the hollow core, filled with thermal conductive insulating materials, and sealed. It has the advantages of simple structure, tight sealing, good insulation and quick installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the sucker rod body of the present invention.

[0015] In the figure: 1. Sucker rod thread; 2. Sucker rod body; 3. Heating plate; 4. Support plate; 5. Internal wires; 6. Thermal conductive insulation material; 7. Cable; 8. Sealing layer. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1

[0018] See also Figure 1-2 The present invention provides a technical solution: an electric heating sucker rod made of a hollow sucker rod, comprising a sucker rod body 2, an electric heating core installed in the sucker rod body 2, the electric heating core consisting of a heating plate 3, a support plate 4 and an internal wire 5, and a sealing layer 8 is provided at both ends of the sucker rod body 2. The sealing layer 8 is used to isolate the electric heating core from the outside world, and one end of a cable 7 is connected to the sealing layer 8.

[0019] In the present invention, the gap between the sucker rod body 2 and the electric heating core is filled with a heat-conducting insulating material, and the heat-conducting insulating material includes aluminum nitride powder, boron nitride powder, and aluminum oxide powder.

[0020] In the present invention, the internal wires 5 of the electric heating core are covered with a high temperature resistant heat insulating material and are buried in the heat conductive insulating material.

[0021] In the present invention, the heating plate 3 is fixed on the support plate 4 and connected to the internal wire 5. The heating plate 3 is a ceramic tungsten wire heating plate.

[0022] In the present invention, the sucker rod body 2 is connected to the oil pump or other sucker rods through the sucker rod thread 1.

[0023] In the present invention, the sealing layer 8 is made of epoxy resin, and the sealing length is as long as possible. At the same time, physical sealing techniques such as rubber and gaskets can be added.

[0024] Example 2

[0025] See also Figure 1-2The present invention provides a technical solution: an electric heating sucker rod made of a hollow sucker rod, comprising a sucker rod body 2, an electric heating core installed in the sucker rod body 2, the electric heating core consisting of a heating rod, a support plate 4 and an internal wire 5, and a sealing layer 8 is provided at both ends of the sucker rod body 2. The sealing layer 8 is used to isolate the electric heating core from the outside world, and one end of a cable 7 is connected to the sealing layer 8.

[0026] In the present invention, the gap between the sucker rod body 2 and the electric heating core is filled with a heat-conducting insulating material, and the heat-conducting insulating material includes aluminum nitride powder, boron nitride powder, and aluminum oxide powder.

[0027] In the present invention, the internal wires 5 of the electric heating core are covered with a high temperature resistant heat insulating material and are buried in the heat conductive insulating material.

[0028] In the present invention, the heating rod is fixed on the support plate 4 and connected to the internal wire 5. The heating rod can be a high-performance ceramic or stainless steel heating rod. A 220V heating rod is used and heated by a three-phase power supply, and a star connection method is used. Since the cable is long, the voltage at both ends of the heating plate and the heating rod is lower than 220V. Using it under low voltage can increase its life.

[0029] In the present invention, the sucker rod body 2 is connected to the oil pump or other sucker rods through the sucker rod thread 1.

[0030] In the present invention, the sealing layer 8 is made of epoxy resin, and the sealing length is as long as possible. At the same time, physical sealing techniques such as rubber and gaskets can be added.

[0031] The present invention utilizes a whole hollow sucker rod or a hollow sucker rod short section of a certain length to manufacture a heated sucker rod and an electrically heated sucker rod. The electric heating core is arranged in the inner space of the hollow sucker rod. The two ends of the sucker rod or the short section body remain unchanged except for connection terminals. One end of the connection terminal is connected to the electric heating core. The electric heating core is sealed in the inner space of the hollow sucker rod or the hollow sucker rod short section. The other end of the connection terminal is connected to a power cable or another electrically heated sucker rod.

[0032] The entire manufacturing process and the finished product do not change the structure of the original hollow sucker rod or hollow sucker rod pup joint, so that it can be freely connected to other sucker rods; the electric heating sucker rod made from the hollow sucker rod or hollow sucker rod pup joint has no change in the appearance of the main body, and the power cable is in the hollow part of the sucker rod, so the cable is not easily damaged. It has the advantages of simple structure, reliable sealing, good insulation and quick installation.

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrically heated sucker rod made of a hollow sucker rod, characterized by: The invention comprises a sucker rod body (2), wherein an electric heating core is installed in the sucker rod body (2), and the electric heating core is composed of a heating plate (3), a support plate (4) and an internal wire (5). A sealing layer (8) is provided at both ends of the sucker rod body (2), and one end of a cable (7) is connected to the sealing layer (8).

2. The electrically heated sucker rod made of a hollow sucker rod according to claim 1, characterized in that: The gap between the sucker rod body (2) and the electric heating core is filled with a heat-conducting insulating material, and the heat-conducting insulating material includes aluminum nitride powder, boron nitride powder, and aluminum oxide powder.

3. The electrically heated sucker rod made of a hollow sucker rod according to claim 1, characterized in that: The internal wires (5) of the electric heating core are covered with a high-temperature resistant heat-insulating material and are buried in the heat-conducting insulating material.

4. The electrically heated sucker rod made of a hollow sucker rod according to claim 1, characterized in that: The heating plate (3) is fixed on the support plate (4) and connected to the internal wire (5). The heating plate (3) is a ceramic tungsten wire heating plate.

5. The electrically heated sucker rod made of a hollow sucker rod according to claim 1, characterized in that: The sucker rod body (2) is connected to the oil pump via the sucker rod thread (1).

6. The electrically heated sucker rod made of a hollow sucker rod according to claim 1, characterized in that: The sealing layer (8) is made of epoxy resin.

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