Special oil pumping rod with special-shaped joint positioning full-coating for oil well

Abstract

The present application relates to the technical field of oil well exploitation, and discloses a special profile joint positioning full-coating special oil pumping rod for oil well, which comprises a polished rod and two profile collars, the inner walls of two second sliding grooves are connected with limiting shafts, the two sides of one end of the two limiting shafts are both provided with first limiting buckles, one end of the two sliding blocks is both fixedly provided with a clamping shaft, one side of the two adjusting frames is both provided with a clamping hole, and the edges of the two ends of the two profile collars are both provided with limiting clamping grooves. In the process of threadingly connecting the series polished rods through the profile collars, the limiting shafts with the first limiting buckles are clamped into the limiting clamping grooves for limiting, the sliding blocks slide in the third sliding grooves to clamp the clamping shafts into the clamping holes in the adjusting frames, the position of the limiting shafts is fixed, the polished rods at the two ends of the profile collars are firmly locked, and the anti-disengagement assembly is further used for reinforcement, so that even if the polished rod is disengaged, the polished rod cannot be disengaged, and the risk of the polished rod being disengaged due to long-term contact with oil is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil well exploitation, and particularly relates to a special profile joint positioning full-coating special sucker rod for oil well. BACKGROUND

[0002] In the field of oil exploitation, the pumping unit well is an important production facility, and the sucker rod, as the core component of the pumping unit well, plays a crucial role. It is connected by couplings to form a kilometer-long rod string, with the upper end connected to the pumping unit or screw pump motor and the lower end connected to the pumping unit plunger. As the core transmission component of the rod pumping system, the sucker rod undertakes the key mission of power transmission, accurately transmitting the reciprocating linear motion (when the pumping unit is working) or rotational torque (when the screw pump is running) generated by the ground equipment to the downhole pump body, thereby ensuring the smooth progress of oil exploitation.

[0003] In the series connection use scenario of the sucker rod, the profile coupling is an indispensable connecting element. It not only makes the connection of the sucker rod more convenient and positioning, but also has sufficient bearing capacity to ensure the stable output of power between the pumping unit and the screw pump. With the continuous progress of oil well development technology, the requirements for the function and material of each component in the oil well pumping system are increasingly strict. Among them, the sucker rod, as the main power structure in the oil well system, its upper end function and structure continue to be optimized and improved, aiming to improve the use efficiency and enhance the operation convenience.

[0004] However, the existing profile joint full-coating sucker rod for oil well still has the following disadvantages in use:

[0005] In the process of connecting the sucker rod through the profile joint and the coupling, since the sucker rod needs to be deep into the oil well for operation, the oil overflowed in the oil well exploitation process will adhere to the surface layer of the sucker rod and the coupling. To some extent, this phenomenon causes the contact surface of the sucker rod and the coupling to have a lubricating effect. In the long-term continuous use process, this lubricating effect may cause the profile joint and the sucker rod joint to slip, thereby causing the problem of falling off. More importantly, the connection area between the ordinary sucker rod and the coupling lacks an effective limiting mechanism, which makes the sucker rod face the risk of falling off during use. Once falling off occurs, it will directly cause the interruption of the oil pumping operation, reduce the oil pumping efficiency, and affect the oil production.

[0006] The upper end of the existing sucker rod is a solid cylindrical rod body during use, which is fixed in series through the coupling. The long-term contact of the solid rod body with the oil in the oil well will cause the corrosion of the internal residues in the oil, resulting in the premature corrosion of the sucker rod and the reduction of the service life of the device. At the same time, the solid sucker rod has a relatively large weight, which requires a higher power pumping unit for driving, increasing the cost of oil well exploitation.

[0007] Therefore, it is necessary to invent a special sucker rod with profiled joint positioning full-coating for oil well to solve the above problems. SUMMARY

[0008] In view of the above problems, the present application provides a special sucker rod with profiled joint positioning full-coating for oil well to solve the problems in the background art.

[0009] To achieve the above object, the present application provides the following technical scheme: a special sucker rod with profiled joint positioning full-coating for oil well, comprising a polished rod and two profiled joints, a limiting mechanism, an anti-dropping assembly and a corrosion-resistant assembly are respectively installed on the polished rod and the two profiled joints.

[0010] The limiting mechanism comprises first sliding grooves opened at both ends of the outer wall of the polished rod, second sliding grooves opened at one side of both ends of the polished rod, the inner walls of one end of the two first sliding grooves are in communication with the inner walls of the two second sliding grooves, receiving holes are opened at the outer edges of both ends of the polished rod located in the two second sliding grooves, the inner walls of the two receiving holes are in communication with the inner walls of the two second sliding grooves, limiting shafts are connected through the inner walls of the two second sliding grooves, first limiting buckles are installed on both sides of one end of the two limiting shafts, first springs are fixed on one side of the inner walls of the two second sliding grooves, one end of the two first springs is fixedly connected with one end of the two limiting shafts, adjusting frames are slidingly connected with the inner walls of the two first sliding grooves, one end of the two adjusting frames is fixedly connected with one side of the two limiting shafts, third sliding grooves are opened at the edges of both ends of the inner wall of the polished rod, the inner walls of one end of the two third sliding grooves are in communication with the inner walls of the two first sliding grooves, sliding blocks are slidingly connected with the inner walls of the two third sliding grooves, slide buttons are fixedly connected with one side of one end of the two sliding blocks through the inner walls of the two third sliding grooves, clamping shafts are fixedly provided at one end of the two sliding blocks, clamping holes are opened at one side of the two adjusting frames, limiting clamping grooves are opened at the edges of both ends of the inner walls of the two profiled joints, limiting strips are fixedly provided at the edges of both ends of the inner walls of the two limiting clamping grooves.

[0011] Preferably, fourth sliding grooves are opened at the edges of one side of the two clamping shafts, second limiting buckles are connected through the inner walls of the two fourth sliding grooves, second springs are fixed on one side of the inner walls of the two fourth sliding grooves, one end of the two second springs is fixedly connected with one end of the two second limiting buckles.

[0012] Preferably, metal joints are fixedly provided at both ends of the polished rod, threaded grooves are opened at the outer walls of the two metal joints and the inner walls of the two profiled joints, and the two metal joints and the two profiled joints are respectively connected through the four threaded grooves.

[0013] Preferably, the anti-detachment component includes mounting grooves formed on the inner walls of the two irregularly shaped couplings at both ends, and the inner walls of the two mounting grooves are respectively connected to the inner walls of the two fifth sliding grooves. A limiting groove is formed at one end of the bottom of the inner wall of the two fifth sliding grooves.

[0014] Preferably, a knob is rotatably mounted on the inner wall of each of the two mounting slots, and a retaining strip is inserted and connected to the inner wall of each of the two fifth sliding grooves. The outer wall on one side of each of the two knobs and the outer wall on one side of each retaining strip are provided with retaining teeth, and the two knobs and the two retaining strips are respectively engaged by four retaining teeth.

[0015] Preferably, a limiting block is fixedly provided on one side of the bottom of each of the two card strips, and the outer wall of each limiting block is slidably connected to the inner wall of each limiting groove.

[0016] Preferably, the anti-corrosion component includes a filling groove located in the middle of the inner wall of the rod, an annular vacuum groove located at the outer edge of the filling groove on the inner wall of the rod, and the outer wall of the rod is covered with a PE coating layer.

[0017] Preferably, the outer wall of the light rod is wrapped with a stainless steel sheath on the outside of the PE coating layer, a reinforcing rod is fixedly provided at the middle position of the inner wall of the filling groove, and a support frame is fixedly provided at equal intervals on the outer wall of the reinforcing rod, and the outer wall of each support frame is fixedly connected to the inner wall of the filling groove.

[0018] The technical effects and advantages of this invention are as follows:

[0019] This invention, by setting a limiting mechanism, during the threaded connection of the series of sucker rods via the irregularly shaped coupling, limits the position of the limiting shaft with a first limiting buckle by inserting it into the limiting slot, and then uses a slider to slide in the third slot to insert the locking shaft into the locking hole on the adjusting frame, thereby fixing the position of the limiting shaft and firmly locking the sucker rods at both ends of the irregularly shaped coupling. This is further reinforced by the anti-detachment component, so that even if the threads slip, they cannot fall off, reducing the risk of slippage and detachment of the sucker rod connection due to long-term contact with oil. It also eliminates the need to interrupt the oil pumping operation due to frequent connection of sucker rods, thus improving the oil pumping efficiency.

[0020] This invention incorporates anti-corrosion components. A PE coating and a stainless steel sheath are installed on the outside of the sucker rod to prevent corrosive liquids from eroding the rod. At the same time, vacuum grooves and filling grooves are opened inside the rod to effectively prevent corrosive gases from seeping in and causing internal corrosion. Furthermore, reinforcing rods are installed in the filling grooves and supported by a support frame, which does not affect the load-bearing capacity of the rod when driving the screw pump. This also reduces the overall weight of the sucker rod, eliminating the need for a higher-power pumping unit to drive it, thus improving the service life of the device and reducing the cost of oil well extraction.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the entire invention;

[0024] Figure 2 This is a schematic diagram of the metal joints at both ends of the optical rod of the present invention;

[0025] Figure 3 This is a schematic diagram of the interior of the optical rod of the present invention;

[0026] Figure 4 This is an appendix to the specification of this invention. Figure 3 An enlarged schematic diagram of point A in the middle;

[0027] Figure 5 This is a schematic diagram of the connection between the slider and the slider button of the present invention;

[0028] Figure 6 This is an appendix to the specification of this invention. Figure 5 An enlarged diagram of point B in the middle;

[0029] Figure 7 This is a schematic diagram of the interior of the irregularly shaped coupling of the present invention;

[0030] Figure 8 This is an appendix to the specification of this invention. Figure 7 An enlarged schematic diagram at point C;

[0031] Figure 9 This is a schematic diagram of the interior of the optical rod of the present invention;

[0032] Figure 10 This is an appendix to the specification of this invention. Figure 9 A magnified diagram of point D in the middle.

[0033] In the diagram: 1. Smooth rod; 2. Irregularly shaped coupling; 3. Limiting mechanism; 301. First slide groove; 302. Second slide groove; 303. Receiving hole; 304. Limiting shaft; 305. First limiting buckle; 306. First spring; 307. Adjusting bracket; 308. Third slide groove; 309. Sliding block; 310. Sliding button; 311. Locking shaft; 312. Locking hole; 313. Limiting slot; 314. Limiting strip; 4. Fourth slide groove; 5. Second limiting... 6. Buckle; 7. Second spring; 8. Metal connector; 9. Threaded groove; 10. Anti-detachment component; 11. Mounting groove; 12. Fifth sliding groove; 13. Limiting groove; 14. Knob; 15. Locking strip; 16. Locking tooth; 17. Limiting block; 18. Anti-corrosion component; 19. Filling groove; 10. Vacuum groove; 10. PE coating layer; 11. Stainless steel sheath; 12. Reinforcing rod; 13. Support frame. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides, for example Figures 1-10 The oil well is shown with a special type of shaped joint positioning and fully enclosed special sucker rod, including a polished rod 1 and two shaped couplings 2. A limit mechanism 3, an anti-detachment component 9 and an anti-corrosion component 10 are respectively installed on the polished rod 1 and the two shaped couplings 2.

[0036] The limiting mechanism 3 includes first grooves 301 formed at both ends of the outer wall of the guide rod 1, and second grooves 302 formed on one side of each end of the guide rod 1. The inner walls of one end of the two first grooves 301 are respectively connected to the inner walls of the two second grooves 302. Receiving holes 303 are formed at the outer edges of the two second grooves 302 at both ends of the guide rod 1. The inner walls of the two receiving holes 303 are respectively connected to the inner walls of the two second grooves 302. Limiting shafts 304 are inserted into the inner walls of the two second grooves 302. First limiting buckles 305 are installed on both sides of one end of each limiting shaft 304. First springs 306 are fixedly provided on one side of the inner walls of the two second grooves 302. One end of each first spring 306 is fixedly connected to one end of each limiting shaft 304. The inner walls of the two rods are slidably connected with adjustment brackets 307, and one end of each adjustment bracket 307 is fixedly connected to one side of each of the two limiting shafts 304. The edges of both ends of the inner wall of the rod 1 are provided with third sliding grooves 308, and the inner walls of one end of each third sliding groove 308 are connected to the inner walls of each first sliding groove 301. The inner walls of each third sliding groove 308 are slidably connected with sliders 309. One side of each slider 309 passes through the inner walls of the two third sliding grooves 308 and is fixedly connected with a sliding button 310. One end of each slider 309 is fixedly provided with a locking shaft 311. One side of each adjustment bracket 307 is provided with a locking hole 312. The edges of both ends of the two irregular couplings 2 are provided with limiting slots 313. The edges of both ends of the inner walls of the two limiting slots 313 are fixedly provided with limiting strips 314.

[0037] In use, adjacent sucker rods 1 are connected in series by the irregular couplings 2 at both ends of the sucker rod 1 to form a complete sucker rod, which is then installed in the oil well and connected to the screw pump for use. During the connection process, the irregular couplings 2 are threaded onto the outer walls of the metal joints 7 at both ends of the sucker rod 1 through the threaded grooves 8. When the irregular couplings 2 are threaded, as their sides approach the end of the sucker rod 1, they will press against the limiting shaft 304, which is inserted into the second sliding groove 302, and compress the limiting shaft 304 so that its exposed end is retracted into the receiving hole 303, as shown in the instruction manual. Figure 4As shown, its inner diameter is larger than the second slide groove 302, so that the two first limiting buckles 305 at the end of the limiting shaft 304 can also be stored in the receiving hole 303. At this time, the guide rod 1 is continuously turned so that the limiting shaft 304 and the first limiting buckle 305 are engaged in the limiting slot 313 on the side of the irregular coupling 2. The guide rod 1 is continuously turned so that the limiting shaft 304 and the first limiting buckle 305 slide together in the limiting slot 313. After sliding to one end, the first limiting buckle 305 is blocked by the limiting strips 314 on both sides, so that the limiting shaft 304 is limited in the limiting slot 313. The same principle applies when the other end of the irregular coupling 2 is connected to the adjacent guide rod 1 in series, so that the adjacent series guide rod 1 is effectively limited by the irregular coupling 2. At this time, the slider 309 is slid in the third slide groove 308 by the sliding button 310 so that it is in the third slide groove 308. 08. Slide the retaining shaft 311 until it is engaged in the retaining hole 312 on one side of the adjusting frame 307. Then the position of the limiting shaft 304 can be fixed, and the series of light rods 1 can be stably connected to both ends of the irregular coupling 2. Even if the irregular coupling 2 and the metal joint 7 are stripped due to long-term oil coverage, the series of light rods 1 will not fall off. The sucker rod can continue to pump oil, reducing the risk of sucker rod falling off and improving oil pumping efficiency. When disassembling later, slide the sliding button 310 to disengage the retaining shaft 311 from the retaining hole 312 on the adjusting frame 307. Then turn the light rod 1 to make the limiting shaft 304 located at the other end of the limiting groove 313. Slide the adjusting frame 307 to compress the first spring 306 and retract the limiting shaft 304 into the second groove 302. Its end is stored in the storage hole 303, and the irregular coupling 2 can be disassembled smoothly.

[0038] Furthermore, a fourth groove 4 is provided on one edge of each of the two retaining shafts 311. A second limiting buckle 5 is inserted and connected to the inner wall of each of the two fourth grooves 4. A second spring 6 is fixed on one side of the inner wall of each of the two fourth grooves 4, and one end of each second spring 6 is fixedly connected to one end of each second limiting buckle 5. After the slider 309, carrying the retaining shaft 311, is inserted into the retaining hole 312 on the adjusting frame 307, the inner wall of the retaining hole 312 will squeeze the second limiting buckle 5 on one side of the retaining shaft 311, causing it to compress the second spring 6 and retract into the fourth groove 4. When the retaining shaft 311 passes through the retaining hole 312, the elastic action of the second spring 6 causes one end of the second limiting buckle 5 to pop out, blocking one side of the adjusting frame 307, thus fixing the position of the adjusting frame 307 and the limiting shaft 304, increasing the stability of the connection between the smooth rod 1 and the irregular coupling 2. Later, by forcefully sliding the sliding button 310, the retaining shaft 311 can be squeezed and retracted into the fourth groove 4, thereby releasing its fixation.

[0039] Metal connectors 7 are fixed at both ends of the bare rod 1. Threaded grooves 8 are opened on the outer wall of the two metal connectors 7 and the inner wall of the two irregular couplings 2. The two metal connectors 7 and the two irregular couplings 2 are respectively threaded through four threaded grooves 8. The threaded grooves 8 on the irregular couplings 2 and the metal connectors 7 match, so that they can be threadedly connected smoothly.

[0040] Furthermore, the anti-detachment component 9 includes mounting grooves 901 formed on the inner walls of both ends of the two irregularly shaped couplings 2. The inner walls of both ends of the two irregularly shaped couplings 2 are provided with fifth sliding grooves 902, and the inner walls of the two mounting grooves 901 are respectively connected to the inner walls of the two fifth sliding grooves 902. A limiting groove 903 is formed at one end of the bottom of the inner wall of the two fifth sliding grooves 902, and the inner wall of one end of the fifth sliding groove 902 is respectively connected to the inner wall of the two irregularly shaped couplings 2, so that the locking strip 905 passes through the fifth sliding groove 902 and moves through the irregularly shaped couplings 2.

[0041] Both mounting slots 901 have knobs 904 rotatably mounted on their inner walls, and both fifth sliding slots 902 have clips 905 inserted into their inner walls. The outer walls of both knobs 904 and clips 905 are provided with teeth 906, and the two knobs 904 and the two clips 905 are engaged by four teeth 906 respectively. The knobs 904 are installed and rotated in the mounting slots 901, and part of their outer walls are exposed on the outside of the irregular coupling 2, making it convenient for the user to rotate them.

[0042] Each of the two locking strips 905 has a fixed limiting block 907 on one side of its bottom. The outer walls of the two limiting blocks 907 are slidably connected to the inner walls of the two limiting grooves 903. After the irregular coupling 2 and the light rod 1 are fixed and limited by the limiting mechanism 3, the user can rotate the knob 904 on the outside of the irregular coupling 2. When it rotates, it engages with the locking strip 905 through the locking teeth 906, and then slides the locking strip 905 in the fifth sliding groove 902 so that one end of it enters the interior of the irregular coupling 2 and is blocked on the side of the metal joints 7 at both ends. This further limits and reinforces the light rod 1 connected by the irregular coupling 2, making it less likely to fall off and improving the stability of the device.

[0043] Furthermore, the anti-corrosion component 10 includes a filling groove 1001 located in the middle of the inner wall of the rod 1, an annular vacuum groove 1002 located at the outer edge of the filling groove 1001 on the inner wall of the rod 1, and a PE coating layer 1003 covering the outer wall of the rod 1. By opening the filling groove 1001 and the vacuum groove 1002 inside the rod 1, corrosive gases and liquids are effectively prevented from entering the interior of the rod 1, causing it to corrode and become unusable. Furthermore, by wrapping it with a PE coating layer 1003 and a stainless steel sheath 1004, the rod 1 is protected from corrosion from external corrosive substances, thus improving the service life of the sucker rod.

[0044] The outer wall of the polished rod 1 is wrapped with a stainless steel sheath 1004 on the outside of the PE coating layer 1003. A reinforcing rod 1005 is fixedly installed in the middle of the inner wall of the filling groove 1001. Support frames 1006 are fixedly installed at equal intervals on the outer wall of the reinforcing rod 1005, and the outer wall of each support frame 1006 is fixedly connected to the inner wall of the filling groove 1001. The reinforcing rod 1005 is installed in the filling groove 1001 inside the polished rod 1, and is supported inside the polished rod 1 by multiple support frames 1006. This reduces the decrease in support while significantly reducing the weight of the sucker rod, eliminating the need to adapt to a higher power pumping unit for oil well extraction and reducing oil well extraction costs.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A special sucker rod for oil wells with a fully enclosed, irregularly shaped joint for positioning, comprising a polished rod (1) and two irregularly shaped couplings (2), characterized in that: The light rod (1) and the two irregular couplings (2) are respectively equipped with a limiting mechanism (3), an anti-detachment component (9) and an anti-corrosion component (10). The limiting mechanism (3) includes first grooves (301) formed at both ends of the outer wall of the light rod (1), and second grooves (302) formed on one side of both ends of the light rod (1). The inner walls of one end of the two first grooves (301) are respectively connected to the inner walls of the two second grooves (302). The light rod (1) has receiving holes (303) at the outer edges of the two second grooves (302) at both ends. The inner walls of the two receiving holes (303) are respectively connected to the inner walls of the two second grooves (302). Limiting shafts (304) are inserted and connected to the inner walls of the two second grooves (302). First limiting buckles (305) are installed on both sides of one end of the two limiting shafts (304). First springs (306) are fixedly provided on one side of the inner walls of the two second grooves (302). One end of the two first springs (306) is fixedly connected to one end of the two limiting shafts (304). The inner walls of the two rods (1) are slidably connected with adjustment brackets (307), and one end of each adjustment bracket (307) is fixedly connected to one side of each of the two limiting shafts (304). The inner walls of the two rods (1) are provided with third sliding grooves (308), and the inner walls of one end of each third sliding groove (308) are connected to the inner walls of the two first sliding grooves (301). The inner walls of each third sliding groove (308) are slidably connected with sliders (309). One side of each slider (309) passes through the inner walls of the two third sliding grooves (308) and is fixedly connected with a sliding button (310). One end of each slider (309) is fixedly provided with a locking shaft (311). One side of each adjustment bracket (307) is provided with a locking hole (312). The edges of both ends of each of the two irregular couplings (2) are provided with limiting slots (313). The edges of the inner walls of the two limiting slots (313) are fixedly provided with limiting strips (314).

2. The special sucker rod for oil wells with a fully enclosed, irregularly shaped joint for positioning, as described in claim 1, is characterized in that: A fourth groove (4) is provided on one side of each of the two card shafts (311). A second limit buckle (5) is inserted and connected to the inner wall of each of the two fourth grooves (4). A second spring (6) is fixedly provided on one side of the inner wall of each of the two fourth grooves (4), and one end of each second spring (6) is fixedly connected to one end of each second limit buckle (5).

3. The special sucker rod for oil wells with a fully enclosed, irregularly shaped joint for positioning, as described in claim 1, is characterized in that: Metal connectors (7) are fixed at both ends of the light rod (1). Threaded grooves (8) are opened on the outer walls of the two metal connectors (7) and the inner walls of the two irregular couplings (2). The two metal connectors (7) and the two irregular couplings (2) are respectively threaded through four threaded grooves (8).

4. The special sucker rod for oil wells with a fully enclosed positioning system according to claim 1, characterized in that: The anti-detachment component (9) includes mounting grooves (901) formed on the inner walls of the two irregular couplings (2) at both ends. The inner walls of the two irregular couplings (2) are provided with fifth sliding grooves (902), and the inner walls of the two mounting grooves (901) are respectively connected to the inner walls of the two fifth sliding grooves (902). A limiting groove (903) is formed at one end of the bottom of the inner wall of the two fifth sliding grooves (902).

5. A special sucker rod for oil wells with a fully enclosed positioning system according to claim 4, characterized in that: The inner walls of the two mounting slots (901) are rotatably mounted with knobs (904), and the inner walls of the two fifth sliding grooves (902) are interlocked with locking strips (905). The outer walls on one side of the two knobs (904) and the outer walls on one side of the two locking strips (905) are provided with locking teeth (906), and the two knobs (904) and the two locking strips (905) are respectively engaged by four locking teeth (906).

6. A special sucker rod for oil wells with a fully enclosed positioning system according to claim 5, characterized in that: Each of the two card strips (905) has a fixed limiting block (907) on one side of its bottom. The outer walls of the two limiting blocks (907) are slidably connected to the inner walls of the two limiting grooves (903).

7. A special sucker rod for oil wells with a fully enclosed positioning system according to claim 1, characterized in that: The anti-corrosion component (10) includes a filling groove (1001) located in the middle of the inner wall of the light rod (1), an annular vacuum groove (1002) is provided on the inner wall of the light rod (1) at the outer edge of the filling groove (1001), and the outer wall of the light rod (1) is covered with a PE coating layer (1003).

8. A special sucker rod for oil wells with a fully enclosed positioning system according to claim 7, characterized in that: The outer wall of the light rod (1) is wrapped with a stainless steel sheath (1004) on the outside of the PE covering layer (1003). A reinforcing rod (1005) is fixedly provided in the middle of the inner wall of the filling groove (1001). Support frames (1006) are fixedly provided at equal intervals on the outer wall of the reinforcing rod (1005), and the outer wall of each support frame (1006) is fixedly connected to the inner wall of the filling groove (1001).

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