Polish rod strong magnetic scale inhibition lubricating anti-oil-spilling device

Abstract

The utility model relates to a polish rod strong magnetic scale inhibition lubrication oil spill prevention device which comprises a strong magnetic block, a device body is mainly composed of a left half body and a right half body, a lubrication anti-scale liquid feeding cavity and a polish rod penetrating hole are arranged in the left half body or the right half body, and a lubrication felt is arranged in the lubrication anti-scale liquid feeding cavity and the polish rod penetrating hole. An oil receiving cavity communicated with the polish rod penetrating hole is formed in the right half body or the left half body, and the oil discharging pipe is connected with the oil receiving cavity. The bottom ends of the right half body and the left half body are provided with gap sealing rings, and a strong magnetic block is fixed to the inner side of the middle polish rod penetrating hole. According to the polish rod sealing device, scale inhibition, scale removal and lubrication are carried out on a polish rod through multiple means, the outer surface of the polish rod can be smooth through treatment measures of the polish rod sealing device on the polish rod, the service life of the polish rod can be prolonged, and meanwhile the service life and the maintenance period of packing in a polish rod sealing device can be prolonged. The device is convenient to use, has obvious effects of recovering sump oil and prolonging the service life of the polish rod sealer, and can generate better economic benefits.

Description

Technical Field

[0001] The utility model relates to an auxiliary sealing device for a polished rod sealer at an oil and natural gas wellhead, in particular to a polished rod strong magnetic scale-proofing, lubricating and oil-overflow-proof device. Background Art

[0002] During the oil production process of the oil well, the pumping unit drives the polished rod, the sucker rod, and the oil pump to reciprocate up and down to pump oil. Since the pumping system is closed and the extracted crude oil has a certain pressure, the polished rod must reciprocate up and down in the polished rod sealer. The polished rod sealer tightly holds the polished rod, which is prone to dry grinding between the polished rod and the polished rod sealer. Especially when the oil well does not produce oil, the pumping unit continues to operate, and the dry grinding between the polished rod and the polished rod sealer is particularly serious, the temperature rises, causing the seal of the polished rod sealer to be damaged, causing oil leakage in the oil well, polluting the environment, and losing crude oil. It will also cause deformation and damage to the polished rod.

[0003] The rod sealer is a wellhead sealing device for the pumping unit that seals the annular space between the rod and the oil pipe. Its main function is to seal the rod through the seal to prevent the oil and gas in the well from spraying out during the rod's up and down movement. When the rod is working in the field, dust, sand and other objects brought by wind and sand are easily adsorbed on the rod to produce dirt. The dirt generated by long-term up and down operations can easily cause damage to the rubber sealing parts. Especially in winter, the hardening of dirt will cause greater damage to the rubber sealing parts. The long-term and frequent up and down operations of the rod will accelerate the wear of the sealing parts.

[0004] In the long-term production process of oil wells, the sealing of oil well polished rods has always been a common problem. Due to the loose sealing between the polished rod and the polished rod sealer, puncture leakage often occurs, which not only causes oil and gas loss but also pollutes the wellhead and well site.

[0005] Dry wear of packing caused by scaling of the polished rod and lack of lubrication is one of the important reasons for poor sealing of the polished rod. Oil leakage from the wellhead pollutes the wellhead and well site, which not only causes energy waste, but also brings a large workload to the front-line production workers.

[0006] In order to solve the above problems, the management and technical personnel at the production site have done a lot of work. After searching, the following related patent technologies are currently available.

[0007] Patent application number: CN201820123231.5 The disclosed oil tree anti-blowout lubrication and dust prevention device comprises a polished rod, an upper baffle, a dust ring, a lower baffle, an oil storage cylinder, an oiling nozzle, a magnet and a polished rod sealer. The polished rod passes through the polished rod sealer, and the polished rod sealer seals the outer surface of the polished rod so that the high-pressure oil flow under the polished rod sealer cannot flow out from between the polished rod and the polished rod sealer. The magnet is placed on the bottom surface of the oil storage cylinder, and the oiling nozzle is installed on the side surface of the oil storage cylinder. An oil storage cavity is arranged inside the oil storage cylinder, and the oil storage cylinder is sleeved on the polished rod. The bottom surface of the oil storage cylinder sits on the upper end surface of the polished rod sealer, and the magnetic force of the magnet makes the oil storage cylinder and the polished rod sealer produce close contact, and the lower baffle is placed on the inner shoulder of the oil storage cylinder. The lower baffle is two semicircular rings, which can buckle the polished rod and then fall on the inner shoulder of the oil storage cylinder, the dust ring is filled on the lower baffle, and the upper baffle is installed on the port of the oil storage cylinder, and the outer thread of the upper baffle is connected with the inner thread of the oil storage cylinder, so that the upper baffle cannot be separated from the oil storage cylinder.

[0008] However, the above device still has the following defects: the above device mainly realizes the lubrication of the polished rod, and cannot prevent the scaling and scale inhibition of the polished rod. The device is adsorbed on the packing box by a magnet, and the packing box and the device cannot be completely sealed, which is easy to cause secondary pollution of the wellhead.

[0009] Patent application number: CN202023036639.5 discloses a multifunctional strong magnetic anti-scaling polished rod blowout preventer, characterized in that it includes a connector threadedly connected to the top of the Christmas tree and a magnetic descaling structure connected to the top opening of the connector, the connector and the magnetic descaling structure are coaxially arranged with the polished rod in the vertical direction, and the polished rod passes through the connector and the magnetic descaling structure; the magnetic descaling structure includes a strong magnetic box gland, a nylon bushing, a strong magnetic slider, a strong magnet and a strong magnetic shell coaxially arranged in the vertical direction, the lower part of the strong magnetic shell is connected to the top opening of the connector, the top opening of the strong magnetic shell is threadedly connected with the strong magnetic box gland to form a magnetic accommodating cavity, the strong magnet, the strong magnetic slider and the nylon bushing are movably arranged in the magnetic accommodating cavity from the outside to the inside and are composed of two identical symmetrical arc tubes, the strong magnet, the strong magnetic slider and the nylon bushing slide radially along the magnetic accommodating cavity toward the polished rod, and the nylon bushing is fitted and slidably connected with the polished rod.

[0010] However, the above device still has the following defects: the above device mainly uses strong magnetism to prevent scale and blowout of the polished rod, but ignores the lubrication of the polished rod and the treatment of oil spill on the polished rod, and cannot solve all problems.

[0011] In short, although there are devices for preventing scale and lubricating the polished rod, there are still some defects such as unsatisfactory effect, single function and inconvenience in use. How to use the packing box or polished rod sealer installed at the wellhead of the oil well as usual, manufacture a scale prevention, lubrication and oil spill prevention device to assist the work of the polished rod sealer, so that the polished rod in the polished rod sealer can be lubricated and prevented from scaling, is a problem that needs to be solved for the polished rod sealer. Summary of the invention

[0012] The utility model provides a polished rod strong magnetic scale prevention, lubrication and oil spill prevention device, which is fixed on the existing polished rod sealer to achieve the purpose of scale prevention and lubrication of the polished rod, and has the function of preventing oil spills, assisting the installed polished rod sealer to prevent scale, lubricate and receive leaked crude oil on the polished rod, and prevent pollution of the wellhead and well site of the oil production well. It reduces the occurrence of crude oil pollution accidents and crude oil losses, reduces the time occupied by oil well shutdown maintenance, protects the environment, reduces the labor intensity of operators, and improves work efficiency.

[0013] The technical solution of the utility model is: a polished rod strong magnetic scale-proof lubrication and oil spill prevention device, including a strong magnetic block, wherein: the device body is mainly composed of a left half body and a right half body, one side of the left half body and the right half body is connected by a fixed shaft and the other side after matching is connected by a fixed pin; a lubricating and scale-proof liquid delivery chamber and a polished rod passing hole are provided in the left half body or the right half body, and the lubricating felt is arranged in the lubricating and scale-proof liquid delivery chamber and the polished rod passing hole; an oil receiving chamber connected to the polished rod passing hole is provided in the right half body or the left half body, and an oil drain pipe is connected to the oil receiving chamber; a mounting gap sealing ring is provided at the bottom end of the right half body and the left half body, and a strong magnetic block is fixed on the inner side of the polished rod passing hole.

[0014] The strong magnetic anti-scaling lubrication and oil spill prevention device is fixed above the polished rod sealer.

[0015] Preferably, the left and right halves of the device body are provided with fixing hooks on the outer sides of the bottoms thereof, and the fixing hooks are fixed to the outer sides of the bottoms of the left and right halves through fixing blocks provided with screw holes; the maximum radius of the light rod passing hole connected to the oil receiving chamber is an axial through groove.

[0016] Preferably, the upper rod body of the fixing hook is provided with an external thread and the lower end of the rod body is an upwardly bent hook body, the fixing hook can be threadedly connected with the screw hole in the fixing block and can be locked in the fixing block by a locking nut.

[0017] Preferably, the total length of the fixing hook is greater than the total height of the packing box in the bare rod sealer; and the locking nut is a butterfly nut.

[0018] Preferably, dust covers are installed on both sides of the top of the left half body and the right half body through a rotating shaft, and both dust covers are provided with a light rod passing hole. The inner diameter of the two light rod passing holes after being matched is 1mm-2mm larger than the outer diameter of the light rod.

[0019] Preferably, the inner diameter of the light rod through hole in the lubricating and anti-scale liquid delivery chamber where the lubricating felt is installed and the light rod through hole in the oil receiving chamber after being matched is equal to or smaller than the outer diameter of the light rod; the installation gap sealing ring is installed in the main body at the outer periphery of the light rod through hole at the bottom ends of the left half and the right half.

[0020] Preferably, the top of the light rod passing hole on the mating side of the lubricating and anti-scaling liquid delivery chamber is lower than the height of the two sides, and the lower height is consistent with the thickness of the lubricating felt.

[0021] Preferably, one side of the lubricating felt is arc-shaped and the other side is elongated, and the lubricating felt is placed on the light rod passing hole at the top of the lubricating and anti-scale liquid delivery cavity; the lubricating felt on the arc-shaped side is adhered to the inner wall of the light rod passing hole, and the lubricating felt on the elongated side is immersed in the lubricating and anti-scale liquid.

[0022] Preferably, the strong magnetic blocks are provided with four pieces and are evenly distributed and fixed on the inner sides of the holes through which the bare rods pass in the left and right halves; the lubricating and anti-scaling liquid delivery cavity can be used to deliver lubricating oil and / or anti-scaling agent; the oil discharge pipe is arranged at the lower end of the oil receiving cavity and can be connected to the casing gate of the wellhead or to a recovery container through a pipeline.

[0023] Preferably, sealing strips are further provided in the main body on both sides of the light rod passing hole in the mating side of the left half body and the right half body; a spring is further installed outside the fixed shaft on the connecting side of the left half body and the right half body, and the spring is installed outside the fixed shaft between the upper and lower mounting seats fixed outside the connecting side of the left half body and the right half body; the fixing pin provided with a handle is inserted into the fixing pin connecting seat fixed outside the mating side of the left half body and the right half body.

[0024] Compared with the prior art, the remarkable use effects of the utility model are:

[0025] 1. The utility model uses multiple means to prevent scale, remove scale and lubricate the polished rod. Through the treatment measures of the polished rod by the device, the outer surface of the polished rod can be made smooth, which can extend the service life of the polished rod, and also extend the service life and maintenance cycle of the packing in the polished rod sealer. The device is provided with an installation gap sealing ring at the lower end of the device body, which seals the installation gap between the polished rod sealer and the device, effectively preventing the leakage of crude oil and well fluid at the polished rod and the sealer, and at the same time, the well fluid leaked from the sealer is carried to the device through the polished rod, and the oil receiving chamber is used to recover the crude oil, water and other liquids leaked from the sealer.

[0026] 2. After using this device, the adverse consequences caused by the packing in the polished rod dry grinding sealer are reduced by lubricating and preventing scale on the polished rod; since the influence of polished rod scaling on the packing is greatly reduced, the service life and replacement frequency of the packing in the polished rod sealer are extended, and the workload and labor intensity of employees are significantly reduced.

[0027] 3. The use of this device avoids the leakage of the polished rod seal caused by the rough outer surface of the polished rod damaging the packing, as well as the pollution to the environment and the loss of oil well production caused by the leakage. It reduces the cost of handling related matters, and at the same time reduces the staff's monitoring time and the labor paid for handling related matters, significantly reducing the labor intensity and workload of the staff.

[0028] 4. After installing the device, the crude oil leaked from the wellhead can be effectively recovered, avoiding energy waste. At the same time, the utility model can also improve the well opening rate, reduce the production time of oil wells shut down for maintenance, and increase economic benefits.

[0029] 5. The utility model has a simple structure, reliable operation, easy installation, and is easy to repair, clean and maintain.

[0030] 6. In summary, the utility model is easy to use, has a significant effect on the recovery of dirty oil and the improvement of the service life of the polished rod sealer, can produce better economic benefits, and has good application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a schematic diagram of the external structure of the utility model.

[0033] Figure 2 yes Figure 1 Schematic diagram of the internal structure analysis.

[0034] In the figure: device body 1, left half 1-1, right half 1-2; dust cover 2, locking nut 3, fixing hook 4, fixing pin connecting seat 5, fixing pin 6, lubricating anti-scaling liquid delivery chamber 7, oil drain pipe 8, fixed shaft 9, oil receiving chamber 10, spring 11, strong magnetic block 12, sealing strip 13, lubricating felt 14, light rod passing hole 15, installation gap sealing ring 16. DETAILED DESCRIPTION

[0035] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of the present utility model. The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] See also Figure 1 and Figure 2 A device for strong magnetic anti-scaling and lubricating oil spill prevention for a polished rod comprises a strong magnetic block 12, wherein: a device body 1 is mainly composed of a left half body 1-1 and a right half body 1-2, one side of the left half body 1-1 and the right half body 1-2 are connected by a fixed shaft 9 and the other side after being matched is connected by a fixed pin 6; a lubricating anti-scaling liquid delivery chamber 7 and a polished rod through hole 15 are provided in the left half body 1-1 or the right half body 1-2, and a lubricating felt 14 is arranged in the lubricating anti-scaling liquid delivery chamber 7 and the polished rod through hole 15; an oil receiving chamber 10 connected to the polished rod through hole 15 is provided in the right half body 1-2 or the left half body 1-1, and an oil drain pipe 8 is connected to the oil receiving chamber 10; an installation gap sealing ring 16 is arranged at the bottom end of the right half body 1-2 and the left half body 1-1, and a strong magnetic block 12 is fixed on the inner side of the polished rod through hole 15.

[0039] The strong magnetic anti-scaling lubrication and oil spill prevention device is fixed above the polished rod sealer.

[0040] The utility model is provided with a strong magnetic block 12, which can utilize the strong magnetic anti-scaling principle to prevent the scale of the light rod passing through the device, and a lubricating anti-scaling liquid delivery chamber 7 and a light rod passing hole 15 are provided in the left half body 1-1 or the right half body 1-2, and a lubricating felt 14 capable of lubricating the light rod is provided in the lubricating anti-scaling liquid delivery chamber 7 and the light rod passing hole 15, and the lubricating anti-scaling liquid adsorbed by the lubricating felt 14 can lubricate and prevent scale on the light rod; an oil receiving chamber 10 connected to the light rod passing hole 15 is provided in the right half body 1-2 or the left half body 1-1, and the oil drain pipe 8 is connected to the oil receiving chamber 10, and the key is that an installation gap sealing ring 16 is provided at the bottom end of the right half body 1-2 or the left half body 1-1, which can seal the installation gap between the device and the light rod sealer, and the crude oil overflowed by the light rod moving up and down can be connected to the oil receiving chamber 10 and flow out through the oil drain pipe 8 for recovery.

[0041] The positions of the lubricating anti-scaling liquid delivery chamber 7 and the oil receiving chamber 10 in the left half body 1-1 and the right half body 1-2 can be selected and interchanged. Figure 1 and Figure 2 As shown in .

[0042] The device body 1, which is mainly composed of a left half body 1-1 and a right half body 1-2, is easy to open and close, and is fixed above the polished rod sealer at the wellhead of an existing oil well to assist the polished rod sealer in lubricating the polished rod, preventing scale and receiving leaked crude oil.

[0043] The utility model achieves the purpose of preventing scale and lubricating the polished rod and has the function of preventing oil spills, can assist the installed polished rod sealer, prevent scale and lubricate the polished rod and receive leaked crude oil, can prevent pollution of the wellhead and well site of the oil production well, improve the opening rate of the oil well, reduce the occurrence of crude oil pollution accidents and crude oil losses, protect the environment, reduce the labor intensity of operators, and improve work efficiency. At the same time, it also reduces the production cost of replacing old polished rod sealers.

[0044] Based on the above embodiment 1, the utility model also has the following embodiments:

[0045] A preferred embodiment: the bottom outer sides of the left half 1-1 and the right half 1-2 of the device body 1 are both provided with fixing hooks 4, and the fixing hooks 4 are fixed to the bottom outer sides of the left half 1-1 and the right half 1-2 through fixing blocks provided with screw holes; the maximum radius of the light rod through hole 15 connected to the oil receiving chamber 10 is an axial through groove, which can collect the well fluid from the light rod sealer to the maximum extent. In order to fix the device above the light rod sealer of the oil production well, the utility model uses fixing blocks provided with screw holes fixed to the bottom outer sides of the left half 1-1 and the right half 1-2 to fix the fixing hooks 4 to the bottoms of both sides of the device body 1.

[0046] A preferred embodiment: the upper rod body of the fixing hook 4 is provided with an external thread and the lower end of the rod body is an upwardly curved hook body, the fixing hook 4 can be threadedly connected with the screw hole in the fixing block and can be locked in the fixing block by the locking nut 3. In order to allow the fixing hook 4 to be threadedly connected with the fixing block, an external thread is processed on the upper end of the rod body of the fixing hook 4 to be connected with the screw hole in the fixing block, and the fixing hook 4 can be locked in the fixing block by the locking nut 3.

[0047] A preferred embodiment: the total length of the fixing hooks 4 is greater than the total height of the packing box in the polished rod sealer, so that the two fixing hooks 4 can hook the lower end of the polished rod sealer box and fix the device body 1 above the polished rod sealer. At the same time, the total length of the fixing hooks 4 is greater than the total height of the packing box in the polished rod sealer, so that the utility model can be applied to polished rod sealers of various sizes, and the locking nut 3 can also be easily adjusted and fixed; the locking nut 3 is a butterfly nut, which is more convenient to fix and use, and eliminates the need to use tools for tightening.

[0048] A preferred embodiment: dust covers 2 are installed on both sides of the top of the left half body 1-1 and the right half body 1-2 through a rotating shaft, and both dust covers 2 are provided with a light rod through hole 15. The inner diameter of the two light rod through holes 15 after being matched is 1mm-2mm larger than the outer diameter of the light rod. Since the device is fixed above the light rod sealer for field work, in order to prevent sand and dust from entering the lubricating anti-scaling liquid delivery chamber 7 and the oil receiving chamber 10 of the device, a dust cover 2 is specially provided for the device. The dust cover 2 installed through the rotating shaft is easy to open and close, and lubricating oil and anti-scaling liquid can be easily added to the lubricating anti-scaling liquid delivery chamber 7.

[0049] A preferred embodiment: the inner diameter of the polished rod through hole 15 in the lubricating anti-scaling liquid delivery chamber 7, in which the lubricating felt 14 is installed, and the polished rod through hole 15 in the oil receiving chamber 10, after being matched, is equal to or smaller than the outer diameter of the polished rod; the installation gap sealing ring 16 is installed in the body at the outer periphery of the polished rod through hole 15 at the bottom of the left half body 1-1 and the right half body 1-2. The polished rod passing through the device and the polished rod sealer can be better sealed to ensure that the well fluid carried by the polished rod can enter the device completely.

[0050] A preferred embodiment: the top of the polished rod through hole 15 on the mating side of the lubricating and anti-scaling liquid delivery chamber 7 is lower than the height of the two sides and the lower height is consistent with the thickness of the lubricating felt 14. This facilitates the assembly of the lubricating felt 14 covering the mating side of the lubricating and anti-scaling liquid delivery chamber 7 and the polished rod through hole 15.

[0051] A preferred embodiment: one side of the lubricating felt 14 is arc-shaped and the other side is elongated, and the lubricating felt 14 is placed on the light rod through hole 15 at the top of the lubricating and anti-scale liquid delivery chamber 7; the lubricating felt 14 on the arc-shaped side is adhered to the inner wall of the light rod through hole 15, and the lubricating felt 14 on the elongated side is immersed in the lubricating and anti-scale liquid.

[0052] A preferred embodiment: the strong magnetic blocks 12 are provided with four pieces and are evenly distributed and fixed on the inner side of the polished rod through hole 15 in the left half body 1-1 and the right half body 1-2; the lubricating and anti-scaling liquid delivery chamber 7 can be used to deliver lubricating oil and / or anti-scaling agent; the oil discharge pipe 8 is arranged at the lower end of the oil receiving chamber 10 and can be connected to the casing gate of the wellhead or to the recovery container through the pipeline. The oil receiving chamber 10 will store crude oil when the polished rod seal leaks oil and access the casing through the oil discharge pipe 8 and the pipeline through the casing gate, directly input into the well or discharge into the recovery container. The lubricating oil and / or anti-scaling agent contained in the lubricating and anti-scaling liquid delivery chamber 7 can be adsorbed by the lubricating felt 14 and attached to the polished rod to lubricate and prevent scale on the polished rod.

[0053] A preferred embodiment: sealing strips 13 are also provided in the body on both sides of the polished rod through hole 15 in the mating side of the left half body 1-1 and the right half body 1-2 to prevent oil leakage from the gap on the mating side; a spring 11 is also installed on the outside of the fixed shaft 9 on the connecting side of the left half body 1-1 and the right half body 1-2, and the spring 11 is installed on the outside of the fixed shaft 9 between the upper and lower mounting seats fixed on the outside of the connecting side of the left half body 1-1 and the right half body 1-2; the fixing pin 6 with a handle is inserted in the fixing pin connecting seat 5 fixed on the outside of the mating side of the left half body 1-1 and the right half body 1-2.

[0054] The embodiments described above are only typical embodiments, but the utility model is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and enlightenment of the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the creative spirit and creative concept of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope is not limited to the above description.

Claims

1. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device, comprising a strong magnetic block, characterized in that: The device body is mainly composed of a left half body and a right half body, one side of the left half body and the right half body are connected by a fixed shaft and the other side after matching is connected by a fixed pin; a lubricating and anti-scale liquid delivery chamber and a light rod passing hole are provided in the left half body or the right half body, and the lubricating felt is arranged in the lubricating and anti-scale liquid delivery chamber and the light rod passing hole; an oil receiving chamber connected to the light rod passing hole is provided in the right half body or the left half body, and an oil drain pipe is connected to the oil receiving chamber; an installation gap sealing ring is provided at the bottom end of the right half body and the left half body, and a strong magnetic block is fixed on the inner side of the middle light rod passing hole, and the strong magnetic anti-scale lubrication and oil overflow prevention device is fixed above the light rod sealer.

2. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 1, characterized in that: The left and right halves of the device body are provided with fixing hooks at the outside of the bottoms thereof, and the fixing hooks are fixed to the outside of the bottoms of the left and right halves through fixing blocks provided with screw holes; the maximum radius of the light rod through hole connected to the oil receiving cavity is an axial through groove.

3. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 2, characterized in that: The upper rod body of the fixing hook is provided with an external thread and the lower end of the rod body is an upwardly bent hook body. The fixing hook can be threadedly connected with the screw hole in the fixing block and can be locked in the fixing block by a locking nut.

4. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 3, characterized in that: The total length of the fixing hook is greater than the total height of the packing box in the polished rod sealer; and the locking nut is a butterfly nut.

5. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 2, characterized in that: Dust covers are installed on both sides of the top of the left half body and the right half body through the rotating shaft, and the two dust covers are provided with a light rod passing hole. The inner diameter of the two light rod passing holes after being matched is 1mm-2mm larger than the outer diameter of the light rod.

6. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 5, characterized in that: The inner diameter of the polished rod through hole in the lubricating anti-scaling liquid delivery chamber where the lubricating felt is installed is equal to or smaller than the outer diameter of the polished rod after being matched with the polished rod through hole in the oil receiving chamber; the installation gap sealing ring is installed in the body around the polished rod through hole at the bottom ends of the left half and the right half.

7. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 6, characterized in that: The top of the light rod passing hole on the mating side of the lubricating anti-scaling liquid delivery cavity is lower than the height of the two sides, and the lower height is consistent with the thickness of the lubricating felt.

8. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 1, 6 or 7, characterized in that: The lubricating felt has an arc-shaped one side and an elongated strip-shaped another side. The lubricating felt is placed on the light rod through hole at the top of the lubricating and anti-scaling liquid delivery cavity. The lubricating felt on the arc-shaped side adheres to the inner wall of the light rod through hole, and the lubricating felt on the elongated side is immersed in the lubricating and anti-scaling liquid.

9. The polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 1, characterized in that: The strong magnetic blocks are provided with four pieces and are evenly distributed and fixed on the inner sides of the polished rod passing holes in the left and right halves; the lubricating and anti-scaling liquid delivery cavity can be used to deliver lubricating oil and / or anti-scaling agent; the oil discharge pipe is arranged at the lower end of the oil receiving cavity and can be connected to the casing gate of the wellhead or to the recovery container through a pipeline.

10. A polished rod strong magnetic anti-scaling lubrication and oil spill prevention device as claimed in claim 9, characterized in that: Sealing strips are also provided in the body on both sides of the polished rod passing hole in the mating side of the left half body and the right half body; a spring is also installed outside the fixed shaft on the connecting side of the left half body and the right half body, and the spring is installed outside the fixed shaft between the upper and lower mounting seats fixed outside the connecting side of the left half body and the right half body; the fixed pin provided with a handle is inserted into the fixed pin connecting seat fixed outside the mating side of the left half body and the right half body.

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