Assembly type cyclic heating sucker rod

Abstract

The utility model relates to the technical field of oil exploitation equipment, and discloses an assembly type circulation heating sucker rod which comprises a sucker rod body, male heads are arranged at the two ends of the sucker rod body respectively, inner cavities of the two male heads are in threaded connection with supporting parts respectively, each supporting part comprises a supporting frame and a pipe barrel fixedly connected with the center of the supporting frame, and an inner pipe is arranged in the inner cavity of the sucker rod body. The two ends of the inner pipe are embedded in the corresponding pipe barrels respectively, a water return channel is formed between the inner wall of the sucker rod and the outer wall of the inner pipe, a water return opening communicated with the water return channel is formed in the supporting frame, one end of the inner pipe extends out of the corresponding pipe barrel, and the other end of the inner pipe retracts into the inner side of the corresponding pipe barrel and forms a containing cavity with a port of the pipe barrel. Every two adjacent sucker rods are connected through a sleeve, and internal threads in threaded connection with the outer wall of the male head are arranged on the inner side of each sleeve. The sucker rod is convenient to mount and dismount, the maintenance cost of the sucker rod is low, and the production cost can be remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to an assembled circulating heating sucker rod. Background Art

[0002] In my country's crude oil production, with the increase of the number of years of production, the proportion of wax-containing wells and high-condensation oil in oil wells is getting larger and larger. The existing electric heating hollow sucker rod consumes a lot of energy, and the commonly used closed-circulation sucker rod has a male head and a female head at both ends of the sucker rod, and the two adjacent sucker rods are connected by a male head and a corresponding female head thread. However, during the oil production process of the sucker rod, since the female head is located on the outside of the male head, it often causes eccentric wear of the female head, causing damage to the female head, and the entire sucker rod needs to be replaced, which has high maintenance costs. Moreover, after the inner thread of the female head is damaged, the inner tube in the sucker rod is not easy to remove, which makes the maintenance of the inner tube more difficult and increases the maintenance cost. Utility Model Content

[0003] The utility model provides an assembled circulating heating sucker rod. The sucker rod is easy to install and disassemble, has low maintenance cost, and can significantly reduce production costs.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] The tube that is extended out of the oil pump stretches out the side of the oil pumping station and is provided with a tube which is extended in the oil pumping station to insert in the oil pumping station.

[0006] The above-mentioned assembled circulating heating sucker rod, wherein a sealing ring groove is provided on the outer side of the male head close to the sucker rod, and a sealing ring is embedded in the sealing ring groove.

[0007] The above-mentioned assembled circulating heating sucker rod, wherein the inner tube includes an inner protective tube, an insulation layer and an outer protective tube from the inside to the outside, the inner protective tube and the outer protective tube are sealed and covered with the insulation layer, and the inner protective tube and the outer protective tube are coaxially arranged with the sucker rod.

[0008] The above-mentioned assembled circulating heating sucker rod, wherein the support frame includes a plurality of support blocks evenly distributed along the circumference of the tube, a return water port is formed between two adjacent support blocks, and the outer end of the support block is provided with an external thread screwed into the inner cavity of the male head.

[0009] In the above-mentioned assembled circulating heating sucker rod, several support blocks are arranged at one end of the tube.

[0010] The above-mentioned assembled circulating heating sucker rod, wherein, the inner sides of the two ends of the tube are respectively provided with annular grooves, and the annular grooves are embedded with sealing rings.

[0011] The above-mentioned assembled circulating heating sucker rod, wherein the inner wall of the tube in the accommodating cavity is provided with an annular groove.

[0012] In the above-mentioned assembled circulating heating sucker rod, the inner tube extending out of the tube is fixedly connected by welding to the end of the tube extending into the inner cavity of the sucker rod.

[0013] The above-mentioned assembled circulating heating sucker rod also includes a circulating water communicator, which includes a mounting seat, a connecting tube, a connecting pipe, a water inlet pipe and a water outlet pipe. The connecting tube is fixedly connected to the bottom of the mounting seat and extends downward. The bottom center of the mounting seat is provided with an upwardly extending water inlet channel, and the side of the mounting seat is provided with a side hole connected to the water inlet channel. The water inlet pipe is connected to the side hole, the top of the connecting pipe is screwed to the water inlet channel, the side wall of the connecting tube is provided with a water outlet, and the water outlet pipe is connected to the water outlet. The inner side of the bottom of the connecting tube is provided with an internal thread screwed to a male head, and the bottom of the connecting pipe is inserted into the accommodating cavity of the tube in the sucker rod.

[0014] The above-mentioned assembled circulating heating sucker rod, wherein, after a plurality of the sucker rods are connected, the bottom ends of the sucker rods are threadedly connected to the plug, and a gap is provided between the inner tube and the plug.

[0015] In summary, the beneficial technical effects of the present invention are:

[0016] The utility model comprises a hollow sucker rod with cylindrical male connectors at both ends, the inner cavities of the two male connectors being respectively threadedly connected to a support portion, the support portion comprising a support frame and a tube fixedly connected to the center of the support frame, the tube being coaxially arranged with the sucker rod, an inner tube being provided in the inner cavity of the sucker rod, the ends of the inner tube being respectively embedded in the corresponding tube, a return water channel being formed between the inner wall of the sucker rod and the outer wall of the inner tube, a return water port being provided on the support frame connecting to the return water channel, one end of the inner tube extending out of the corresponding tube, the other end of the inner tube being retracted into the inner side of the corresponding tube, and a receiving chamber being formed between the port of the tube, two adjacent sucker rods being connected by a sleeve having an internal thread threadedly connected to the outer wall of the male connectors; when the two adjacent sucker rods are docked, the inner tube extending out of the tube of one sucker rod is embedded in the tube receiving chamber of the other sucker rod. The sucker rod is easy to install and disassemble, has low maintenance costs, and can significantly reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 It is a structural diagram of the support portion of the utility model;

[0019] Figure 3 This is a cross-sectional view of two adjacent sucker rods of the utility model being screwed together through a casing;

[0020] Figure 4 The utility model is a structural schematic diagram of the screw connection between the top of the sucker rod and the circulating water connector.

[0021] As shown in the figure, 1. sucker rod; 12. male connector; 121. sealing ring groove; 2. support part; 21. support frame; 211. support block; 212. return water port; 22. tube; 221. accommodating chamber; 222. annular groove; 3. inner tube; 31. inner protective tube; 32. insulation layer; 33. outer protective tube; 4. casing; 5. sealing ring; 6. return water channel; 7. circulating water connecting vessel; 71. mounting seat; 711. water inlet channel; 712. side hole; 72. connecting tube; 73. connecting tube; 74. water inlet pipe; 75. water outlet pipe. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 The utility model is described in further detail.

[0023] like Figure 1As shown, an assembled circulating heating sucker rod comprises a hollow sucker rod 1, wherein both ends of the sucker rod 1 are provided with a male head 12 with a step to form a cylindrical shape, and the inner cavities of the two male heads 12 are respectively screwed to the support part 2, and the support part 2 comprises a support frame 21 and a tube 22 fixedly connected to the center of the support frame 21, and the tube 22 is coaxially arranged with the sucker rod 1, and the inner cavity of the sucker rod 1 is provided with an inner tube 3, and the two ends of the inner tube 3 are respectively embedded in the corresponding tube 22, and a return water channel 6 is formed between the inner wall of the sucker rod 1 and the outer wall of the inner tube 3, and a channel for connecting two adjacent sucker rods is provided on the support frame 21. At the return water port 212 of the return water channel 6 between the oil rods 1, one end of the inner tube 3 extends out of the corresponding tube 22, and the other end of the inner tube 3 is retracted into the inner side of the corresponding tube 22 to form an accommodating cavity 221 with the port of the tube 22. The two adjacent sucker rods 1 are connected by a sleeve 4. The outer wall of the male head 12 is provided with an external thread, and the inner side of the sleeve 4 is provided with an internal thread screwed to the outer wall of the male head 12. When the two adjacent sucker rods 1 are docked, the inner tube 3 extending out of the tube 22 in one sucker rod 1 is embedded in the accommodating cavity 221 of the tube 22 in the other sucker rod 1.

[0024] The use of the casing 4 to screw two adjacent sucker rods 1 facilitates replacement of the casing 4 when it is damaged, without having to replace the entire sucker rod 1, thereby reducing production and maintenance costs.

[0025] In order to prevent the water in the return water channel 6 from leaking from the connection between the two adjacent sucker rods 1 when they are connected, a sealing ring groove 121 is provided on the outer side of the male connector 12 close to the sucker rod 1, and a sealing ring 5 is embedded in the sealing ring groove 121. When the sleeve 4 is screwed to the male connector 12, the inner wall of the sleeve 4 is sealed with the sealing ring 5 in the sealing ring groove 121.

[0026] like Figure 1 As shown, the inner tube 3 of this embodiment comprises, from inside to outside, an inner protective tube 31, an insulation layer 32, and an outer protective tube 33. The inner and outer protective tubes 31 and 33 sealably enclose the insulation layer 32 and are coaxially arranged with the sucker rod 1. The provision of the insulation layer 32 improves the thermal efficiency of the return channel 6 and accelerates the liquefaction of crude oil outside the sucker rod 1.

[0027] The support frame 21 includes a plurality of support blocks 211 evenly distributed along the circumference of the tube 22. A return water port 212 is formed between two adjacent support blocks 211 to connect the return water channel 6 between two adjacent sucker rods 1. The inner cavity of the male head 12 is provided with an internal thread, and the outer end of the support block 211 is provided with an external thread screwed to the inner cavity of the male head 12. The support frame 21 can move along the axial direction of the sucker rod 1.

[0028] In one embodiment, a plurality of support blocks 211 are disposed at one end of the tube 22 . This configuration can reduce the length of the internal thread of the inner cavity of the male head 12 .

[0029] In order to improve the sealing performance of the connection between the tube 22 and the inner tube 3 and prevent the high-temperature and high-pressure water in the inner tube 3 from entering the return water channel 6 at the connection between the two adjacent sucker rods 1, annular grooves 222 are respectively provided on the inner sides of the two ends of the tube 22, and sealing rings 5 are embedded in the annular grooves 222.

[0030] like Figure 1 As shown, in the accommodating cavity 221 formed by the tube 22, an annular groove 222 is provided on the inner wall of the tube 22 at the accommodating cavity 221, so as to ensure that the inner tube 3 inserted into the accommodating cavity 221 can be sealed and connected with the sealing ring 5 in the annular groove 222.

[0031] like Figure 1 As shown, in order to prevent the inner tube 3 from moving along the axis in the tube barrel 22, the inner tube 3 extending out of the tube barrel 22 of this embodiment is welded and fixedly connected to the end of the tube barrel 22 extending into the inner cavity of the sucker rod 1.

[0032] The present invention also includes a circulating water communicating vessel 7, which includes a mounting base 71, a connecting tube 72, a connecting pipe 73, a water inlet pipe 74 and a water outlet pipe 75. The connecting tube 72 is fixedly connected to the bottom of the mounting base 71 and extends downward. A water inlet channel 711 extending upward is provided at the bottom center of the mounting base 71. A side hole 712 communicating with the water inlet channel 711 is provided on the side of the mounting base 71. The water inlet pipe 74 is communicated with the side hole 712. The top of the connecting pipe 73 is screwed to the water inlet channel 711. A water outlet is provided on the side wall of the connecting tube 72. The water outlet pipe 75 is communicated with the water outlet. The inner side of the bottom of the connecting tube 72 is provided with an internal thread screwed to the male head 12. The bottom of the connecting pipe 73 is inserted into the accommodating cavity 221 of the tube 22 in the sucker rod 1, and the connecting pipe 73 is communicated with the inner tube 3.

[0033] After the multiple sucker rods 1 are connected, the bottom ends of the sucker rods 1 are threadedly connected to plugs (not shown in the figure), and a gap is provided between the inner tube 3 and the plug.

[0034] like Figure 4 As shown, when the sucker rod is operating, the surface water is heated by the heater and pressurized by the circulating pump. The high-temperature, high-pressure water enters the side hole 712 of the circulating water manifold 7 through the water inlet pipe 74, and enters the connecting pipe 73 and the inner pipe 3 through the water inlet channel 711. The high-temperature, high-pressure water flows to the bottom of the inner pipe 3, passes through the plug at the bottom end of the sucker rod 1, and flows upward from the return water channel 6 between the inner pipe 3 and the sucker rod 1. It enters the connecting tube 72 in the circulating water manifold 7 through the return water port 212 on the support frame 21, and finally is discharged to the surface liquid storage tank through the water outlet pipe 75 to be heated by the heater for secondary heating. The crude oil in contact with the outside of the sucker rod 1 exchanges heat with the high-temperature, high-pressure water in the sucker rod 1 through the side wall of the sucker rod 1. The heat in the water is transferred to the crude oil, liquefying the crude oil for further extraction.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. An assembled circulating heating sucker rod, comprising a hollow sucker rod, characterized in that: The two ends of the pumping rod are respectively provided with a step-forming cylindrical male head, and the inner cavities of the two male heads are respectively screwed to the support parts, and the support part includes a support frame and a tube fixedly connected to the center of the support frame. The tube is coaxially arranged with the pumping rod, and the inner cavity of the pumping rod is provided with an inner tube, and the two ends of the inner tube are respectively embedded in the corresponding tube tube, and a return water channel is formed between the inner wall of the pumping rod and the outer wall of the inner tube. The support frame is provided with a return water port connected to the return water channel, one end of the inner tube extends out of the corresponding tube tube, and the other end of the inner tube is retracted into the inner side of the corresponding tube tube and forms an accommodating cavity between the port of the tube tube, and the adjacent two pumping rods are connected by a sleeve, and the inner side of the sleeve is provided with an internal thread screwed to the outer wall of the male head; when the two adjacent pumping rods are docked, the inner tube extending from the tube tube in one pumping rod is embedded in the tube tube in the other pumping rod.

2. The assembled circulating heating sucker rod according to claim 1, characterized in that: A sealing ring groove is provided on the outer side of the male head close to the sucker rod, and a sealing ring is embedded in the sealing ring groove.

3. The assembled circulating heating sucker rod according to claim 1, characterized in that: The inner tube includes an inner protective tube, an insulation layer and an outer protective tube from inside to outside. The inner protective tube and the outer protective tube are sealed and covered with the insulation layer. The inner protective tube, the outer protective tube and the sucker rod are coaxially arranged.

4. The assembled circulating heating sucker rod according to claim 1, characterized in that: The support frame includes a plurality of support blocks evenly distributed along the circumference of the tube, a water return port is formed between two adjacent support blocks, and the outer ends of the support blocks are provided with external threads that are screwed to the inner cavity of the male head.

5. The assembled circulating heating sucker rod according to claim 4, characterized in that: A plurality of support blocks are arranged at one end of the tube.

6. The assembled circulating heating sucker rod according to claim 1, characterized in that: Annular grooves are respectively provided on the inner sides of both ends of the tube, and sealing rings are embedded in the annular grooves.

7. The assembled circulating heating sucker rod according to claim 6, characterized in that: An annular groove is provided on the inner wall of the tube in the accommodating cavity.

8. The assembled circulating heating sucker rod according to claim 1, characterized in that: The inner tube extending out of the tube is fixedly connected to the end of the tube extending into the inner cavity of the sucker rod by welding.

9. The assembled circulating heating sucker rod according to claim 1, characterized in that: It also includes a circulating water communicating device, which includes a mounting seat, a connecting cylinder, a connecting pipe, a water inlet pipe and a water outlet pipe. The connecting cylinder is fixedly connected to the bottom of the mounting seat and extends downward. The bottom center of the mounting seat is provided with an upwardly extending water inlet channel, and the side of the mounting seat is provided with a side hole connected to the water inlet channel. The water inlet pipe is connected to the side hole, the top of the connecting pipe is screwed to the water inlet channel, the side wall of the connecting cylinder is provided with a water outlet, and the water outlet pipe is connected to the water outlet. The inner side of the bottom of the connecting cylinder is provided with an internal thread screwed to a male head, and the bottom of the connecting pipe is inserted into the accommodating cavity of the tube in the sucker rod.

10. The assembled circulating heating sucker rod according to claim 1, characterized in that: After the plurality of sucker rods are connected, the bottom ends of the sucker rods are threadedly connected to the plugs, and a gap is provided between the inner tube and the plugs.

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