Anti-abrasion and anti-corrosion device for hollow sucker rod

Abstract

The utility model provides a hollow sucker rod anti-abrasion and anti-corrosion device, and relates to the technical field of hollow sucker rod structures, the hollow sucker rod anti-abrasion and anti-corrosion device comprises a sucker rod and a replacement rod, the sucker rod is used for pumping petroleum, the replacement rod is arranged in the sucker rod, a protection layer is installed in the replacement rod in an attached mode, and the protection layer is used for protecting the interior of the replacement rod. According to the technical scheme, a replacement rod is inserted into a mounting groove formed in the sucker rod, after the replacement rod moves to a certain position towards the lower end, a mounting cap at the upper end of the replacement rod makes contact with the top of the sucker rod, and a threaded ring in the mounting cap makes contact with a matched threaded ring outside the sucker rod; at the moment, the installation cap is rotated to enable the internal threaded ring to be in threaded connection with the matched threaded ring outside the sucker rod, the replacement rod is fixedly installed in the installation groove in the sucker rod, the replacement rod is attached to the installation groove without a gap, and when the sucker rod is used for pumping oil in an oil field, water and oxidizing substances cannot make contact with the sucker rod. Therefore, the interior of the sucker rod cannot be corroded.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow sucker rods, in particular to a hollow sucker rod anti-wear and anti-corrosion device. Background Art

[0002] At present, with the continuous development of my country's petroleum industry, the production of refractory reserves such as heavy oil and high wax content is constantly being carried out. The use of refractory reserves such as heavy oil and high wax content requires the use of hollow sucker rods from the perspective of technology. The traditional ordinary hollow sucker rod is a new type of oil production equipment used for the production of high-viscosity and high-condensation crude oil in oil fields. It injects heat carrier hot oil, hot water, hot gas, chemical agents or lowers cables into the oil well through the central hole of the rod body to reduce viscosity and dissolve wax, thereby improving the fluidity of crude oil and improving the production efficiency of "three high" crude oil. It can also be used for water injection, wax removal, sand flushing and stratified oil production. At the same time, it has high rigidity and strong torque bearing capacity, and is also widely used to drive screw pumps.

[0003] In the production process of existing oil fields, with the increasing use of hollow sucker rods, the wear of hollow sucker rods is becoming more and more common. In the normal working process, the hollow sucker rods are corroded and worn, resulting in the reduction of the strength of the hollow sucker rods and the occurrence of fractures, which seriously shortens the service life of the hollow sucker rods. The hollow sucker rods need to be replaced frequently, which brings huge economic losses to the production. Utility Model Content

[0004] In order to overcome the existing oil field in the production process, with the use of hollow sucker rods more and more, the wear of hollow sucker rods is becoming more and more common. During normal operation, the hollow sucker rod is corroded and worn, resulting in reduced strength and fracture of the hollow sucker rod, which seriously shortens the service life of the hollow sucker rod. The hollow sucker rod needs to be replaced frequently, which brings huge economic losses to production. The embodiment of the present application provides a hollow sucker rod anti-wear and anti-corrosion device. When the sucker rod needs to be used for work, a replacement rod is inserted into the installation groove opened inside the sucker rod. After the replacement rod moves to a certain position at the lower end, the installation cap at the upper end of the replacement rod contacts the top of the sucker rod. After the installation cap contacts the sucker rod, the threaded ring inside the installation cap contacts the matching threaded ring outside the sucker rod. At this time, the installation cap is rotated to make the internal threaded ring and the matching threaded ring outside the sucker rod threadedly connected, so that the replacement rod is fixedly installed in the installation groove inside the sucker rod. The replacement rod fits with the inner wall of the installation groove without a gap. When the sucker rod is pumping oil in the oil field, water and oxidizing substances cannot contact the sucker rod, and thus cannot corrode the inside of the sucker rod.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0006] A hollow sucker rod anti-wear and anti-corrosion device comprises a sucker rod and a replacement rod, the sucker rod being used for extracting oil from petroleum;

[0007] A replacement rod, which is arranged inside the sucker rod;

[0008] Wherein, a replacement rod is arranged inside the sucker rod, and a protective layer is fitted inside the replacement rod, and the protective layer is used to protect the inside of the replacement rod.

[0009] In a possible implementation, a mounting cap is fixedly connected to the upper end of the replacement rod, and a threaded ring is provided on the inner wall of the mounting cap.

[0010] In a possible implementation, a connection port is opened inside the mounting cap, and the connection port penetrates into the interior of the replacement rod.

[0011] In a possible implementation, a mounting groove is provided inside the sucker rod, and an inner wall of the mounting groove fits with a surface of the replacement rod, so that no gap is generated when the replacement rod enters the mounting groove.

[0012] In a possible implementation, a matching thread ring is provided on the outside of the upper end of the sucker rod, and the matching thread ring is threadedly connected to the thread ring inside the mounting cap.

[0013] In a possible implementation, a connector is fixedly connected to the bottom of the sucker rod, a threaded hole is provided inside the connector, and an inner wall of the threaded hole is provided with a mounting thread.

[0014] In a possible implementation, a non-slip leather cover is fixedly connected to the outer surface of the sucker rod, and the surface of the non-slip leather cover is provided with non-slip grooves.

[0015] In summary, the present invention includes at least one of the following beneficial technical effects:

[0016] 1. Insert the replacement rod into the installation groove inside the sucker rod. After the replacement rod moves to a certain position at the lower end, the installation cap at the upper end of the replacement rod contacts the top of the sucker rod. After the installation cap contacts the sucker rod, the threaded ring inside the installation cap contacts the matching threaded ring outside the sucker rod. Then, rotate the installation cap to make the threaded ring inside the mounting cap threadedly connected with the matching threaded ring outside the sucker rod, so that the replacement rod is fixedly installed in the installation groove inside the sucker rod, and the replacement rod fits the installation groove without a gap. When the sucker rod is pumping oil in the oil field, water and oxidizing substances cannot contact the sucker rod, and thus cannot corrode the inside of the sucker rod.

[0017] 2. Connect the sucker rod to other equipment by rotating it. The staff will hold the anti-slip leather cover with their hands. The anti-slip pattern on the anti-slip leather cover can increase the friction and prevent the staff from slipping when rotating the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the overall structural diagrams of the utility model;

[0019] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the utility model when the replacement rod and the sucker rod are separated;

[0021] Figure 4 It is a cross-sectional view of the replacement rod and the protective layer of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the utility model when the sucker rod and the replacement rod are separated.

[0023] Description of the drawings: 1. Sucker rod; 2. Replacement rod; 3. Protective layer; 4. Mounting cap; 5. Threaded ring; 6. Mounting groove; 7. Connector; 8. Threaded hole; 9. Mounting thread; 10. Anti-slip leather cover; 11. Anti-slip pattern; 12. Connecting port; 13. Matching threaded ring. DETAILED DESCRIPTION

[0024] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0025] Embodiment 1:

[0026] This embodiment introduces a specific structure of a hollow sucker rod anti-wear and anti-corrosion device. Figure 1-Figure 5 As shown, it includes a sucker rod 1 and a replacement rod 2. The sucker rod 1 is used to extract oil. The replacement rod 2 is arranged inside the sucker rod 1. A protective layer 3 is fitted inside the replacement rod 2. The protective layer 3 is used to protect the inside of the replacement rod 2.

[0027] When the sucker rod 1 needs to be used for work, the replacement rod 2 is inserted into the installation groove 6 opened inside the sucker rod 1. After the replacement rod 2 moves to a certain position at the lower end, the installation cap 4 at the upper end of the replacement rod 2 contacts the top of the sucker rod 1. After the installation cap 4 contacts the sucker rod 1, the threaded ring 5 inside the installation cap 4 contacts the matching threaded ring 13 outside the sucker rod 1. At this time, the installation cap 4 is rotated to make the internal threaded ring 5 and the matching threaded ring 13 outside the sucker rod 1 threadedly connected, so that the replacement rod 2 is fixedly installed in the installation groove 6 inside the sucker rod 1. The replacement rod 2 fits the inner wall of the installation groove 6 without a gap. When the sucker rod 1 is pumping oil in the oil field, water and oxidizing substances cannot contact the sucker rod 1, and thus cannot corrode the inside of the sucker rod 1.

[0028] At the same time, the interior of the replacement rod 2 is coated with three layers of polyethylene. When the replacement rod 2 has been used for a period of time, it is only necessary to take the replacement rod 2 out of the sucker rod 1, and the three layers of polyethylene inside the replacement rod 2 need to be scraped off, and the interior of the replacement rod 2 needs to be re-coated with three layers of polyethylene. After the coating is completed, the replacement rod 2 is placed inside the sucker rod 1 and fits with the inner surface of the mounting groove 6 inside the sucker rod 1, so that the replacement rod 2 seals the mounting groove 6 to protect the inside of the sucker rod 1 from contact with oil, and water and oxidizing substances cannot corrode the inside of the sucker rod 1, thereby greatly enhancing the service life of the sucker rod 1.

[0029] By adopting the above technical solution:

[0030] When the sucker rod 1 needs to be used for work, the replacement rod 2 is inserted into the installation groove 6 opened inside the sucker rod 1. After the replacement rod 2 moves to a certain position at the lower end, the installation cap 4 at the upper end of the replacement rod 2 contacts the top of the sucker rod 1. After the installation cap 4 contacts the sucker rod 1, the threaded ring 5 inside the installation cap 4 contacts the matching threaded ring 13 outside the sucker rod 1. At this time, the installation cap 4 is rotated to make the internal threaded ring 5 threadedly connected with the matching threaded ring 13 outside the sucker rod 1, so that the replacement rod 2 is fixedly installed in the installation groove 6 inside the sucker rod 1. The replacement rod 2 fits closely with the inner wall of the installation groove 6 without any gap. When the sucker rod 1 is pumping oil in the oil field, water and oxidizing substances cannot contact the sucker rod 1, and thus cannot corrode the inside of the sucker rod 1.

[0031] Embodiment 2:

[0032] Based on Example 1, this example introduces the specific structure of the bottom plate. When the replacement rod 2 is replaced, the threaded hole 8 inside the connector 7 fixed at the bottom of the sucker rod 1 is aligned with one end of the oil pump. The sucker rod 1 is rotated to drive the mounting thread 9 on the inner wall of the threaded hole 8 to rotate and connect with one end of the oil pump, so that the lower end of the sucker rod 1 is connected to one end of the oil pump. The oil pump transports oil into the sucker rod 1, and the sucker rod 1 transports the internal oil upward. The connecting port 12 opened inside the mounting cap 4 connected to the upper end of the sucker rod 1 is connected to the light rod so that the sucker rod 1 transports the internal oil to the inside of the light rod. After the two ends of the sucker rod 1 are connected and installed, the oil field can be pumped.

[0033] Furthermore, when the sucker rod 1 needs to be rotated, the staff will hold the anti-skid leather cover 10 with their hands, and the anti-skid pattern 11 on the anti-skid leather cover 10 can increase the friction force to prevent the staff from slipping when rotating the sucker rod 1.

[0034] The user's operation steps are:

[0035] S1. When the sucker rod 1 needs to be used for work, the replacement rod 2 is inserted into the installation groove 6 opened inside the sucker rod 1. After the replacement rod 2 moves to a certain position at the lower end, the installation cap 4 at the upper end of the replacement rod 2 contacts the top of the sucker rod 1. After the installation cap 4 contacts the sucker rod 1, the threaded ring 5 inside the installation cap 4 contacts the matching threaded ring 13 outside the sucker rod 1. At this time, the installation cap 4 is rotated to make the internal threaded ring 5 and the matching threaded ring 13 outside the sucker rod 1 threadedly connected, so that the replacement rod 2 is fixedly installed in the installation groove 6 inside the sucker rod 1. The replacement rod 2 fits the inner wall of the installation groove 6 without a gap. When the sucker rod 1 is pumping oil in the oil field, water and oxidizing substances cannot contact the sucker rod 1, and thus cannot corrode the inside of the sucker rod 1.

[0036] S2. After the replacement rod 2 has been used for a period of time, it is only necessary to take the replacement rod 2 out of the sucker rod 1. The three layers of polyethylene inside the replacement rod 2 need to be scraped off, and the inside of the replacement rod 2 is re-coated with three layers of polyethylene. After the coating is completed, the replacement rod 2 is put into the sucker rod 1 to fit the inner surface of the mounting groove 6 inside the sucker rod 1, so that the replacement rod 2 seals the mounting groove 6 to protect the inside of the sucker rod 1 from contacting with oil, and water and oxidizing substances cannot corrode the inside of the sucker rod 1, thereby greatly increasing the service life of the sucker rod 1.

[0037] S3. When the replacement rod 2 is replaced, the threaded hole 8 inside the connector 7 fixed at the bottom of the sucker rod 1 is aligned with one end of the oil pump. After alignment, the sucker rod 1 is rotated to drive the mounting thread 9 on the inner wall of the threaded hole 8 to rotate and connect with one end of the oil pump, thereby completing the connection between the sucker rod 1 and the oil pump. When the lower end of the sucker rod 1 is connected to the oil pump, the connecting port 12 opened inside the mounting cap 4 at the upper end of the sucker rod 1 is connected to the bare rod. After the two ends of the sucker rod 1 are connected and installed, oil can be pumped from the oil field.

[0038] By adopting the above technical solution:

[0039] After the replacement rod 2 is replaced, the threaded hole 8 inside the connecting head 7 fixed at the bottom of the sucker rod 1 is aligned with one end of the oil pump, and the sucker rod 1 is rotated to drive the mounting thread 9 on the inner wall of the threaded hole 8 to rotate and connect and fix with one end of the oil pump, thereby completing the connection between the sucker rod 1 and the oil pump. When the lower end of the sucker rod 1 is connected to the oil pump, the connecting port 12 opened inside the mounting cap 4 at the upper end of the sucker rod 1 is connected to the bare rod. After the two ends of the sucker rod 1 are connected and installed, oil can be pumped from the oil field.

[0040] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A hollow sucker rod anti-wear and anti-corrosion device, characterized in that: include: A sucker rod (1) for extracting oil; A replacement rod (2) is arranged inside the sucker rod (1); Wherein, a replacement rod (2) is arranged inside the sucker rod (1), and a protective layer (3) is fitted inside the replacement rod (2), and the protective layer (3) is used to protect the inside of the replacement rod (2); The upper end of the replacement rod (2) is fixedly connected with a mounting cap (4), the inner wall of the mounting cap (4) is provided with a threaded ring (5), the interior of the sucker rod (1) is provided with a mounting groove (6), and the inner wall of the mounting groove (6) is in contact with the surface of the replacement rod (2); The bottom of the sucker rod (1) is fixedly connected with a connector (7), a threaded hole (8) is provided inside the connector (7), and an installation thread (9) is provided on the inner wall of the threaded hole (8).

2. A hollow sucker rod anti-wear and anti-corrosion device as claimed in claim 1, characterized in that: A connection port (12) is provided inside the mounting cap (4), and the connection port (12) penetrates into the interior of the replacement rod (2).

3. The hollow sucker rod anti-wear and anti-corrosion device according to claim 1, characterized in that: A matching threaded ring (13) is arranged on the outside of the upper end of the sucker rod (1), and the matching threaded ring (13) is threadedly connected to a threaded ring (5) inside the mounting cap (4).

4. The hollow sucker rod anti-wear and anti-corrosion device according to claim 1, characterized in that: The outer surface of the sucker rod (1) is fixedly connected to a non-slip leather cover (10), and the surface of the non-slip leather cover (10) is provided with non-slip patterns (11).

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