Rotary anti-wear and anti-corrosion three-arc sucker rod centralizer

By designing a rotary anti-wear and anti-corrosion three-arc oil-surface pumping rod straightener, the automatic rotation and bending adjustment function of the alloy straightener sleeve is used to solve the problem of grinding the oil rod and oil pipe in the oil well, achieving a longer service life and better Low operating costs.

CN112211571BActive Publication Date: 2024-12-31DEZHOU YUANHAO PETROLEUM EQUIP CO LTD
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Patent Information

Application Number
CN202011101365.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-10-11
Publication Date
2024-12-31
Estimated Expiration
2040-10-11

AI Technical Summary

Technical Problem

The existing rotary oil well anti-grinding tools cannot effectively solve the problem of grinding the pump rod and oil pipe in the oil well, resulting in short service life, lack of obvious wax scraping effect, and prone to jamming, extending the pump inspection cycle, affecting oil field production Efficiency and cost.

Method used

A rotary anti-wear and anti-corrosion three-arc oil-suppressing rod straightener was designed, and a straightening sleeve made of alloy has automatic rotation and bending adjustment functions, which has changed the friction method with the inner wall of the oil pipe, and has three arc surfaces on the side. Structure, reduces resistance, and scrapes the inner wall of the oil pipe by rotating the motor and auxiliary scraper to avoid jamming.

Benefits of technology

It significantly improves the anti-blade effect, extends the service life of the suction rod and oil pipe, reduces the pump lifting pressure, extends the pump inspection cycle, enhances the oil field production efficiency and reduces costs.

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    Figure CN112211571B_ABST
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Abstract

The present invention discloses a rotary anti-wear and anti-corrosion three-arc sucker rod straightener, comprising a main body, a limiting block extending outward from the middle of one side of the outer wall of the main body, a straightening sleeve rotating at the outer wall of one end of the main body, and one side of the outer wall of the straightening sleeve is fitted to the outer wall of the limiting block, and the cross section of the straightening sleeve is an arc-shaped triangle. The straightening and anti-eccentric wear effect is remarkable. The straightening sleeve made of alloy automatically rotates axially and automatically adjusts the inclination angle with the bending of the well wall during the reciprocating motion of the sucker rod, ensuring the maximum fit with the well wall and preventing the eccentric wear of the sucker rod and the inner wall of the oil pipe. The alloy straightening sleeve adopts a three-arc surface structure on the side, which changes the point or line friction between the previous coupling and the straightener and the inner wall of the oil pipe, reduces the resistance, and makes relative movement to the sheet or mass wax points on the inner wall of the oil pipe, so that the wax points are separated from the inner wall of the oil pipe and discharged with the well fluid, reducing the pump lifting pressure, reducing pump jams, extending the pump inspection cycle, and increasing production and reducing consumption.
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Description

Technical Field

[0001] The invention belongs to the technical field of oil well equipment, in particular to a rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer. Background Art

[0002] During the mechanical oil production process of the pumping unit, oil well eccentric wear is a major issue affecting the production cost of the oil field. Various treatment methods have emerged one after another. With the lowering of various anti-eccentric wear tools into the well, new situations have also arisen, such as the increase in the upward load of the pumping unit, the increase in the downward resistance of the sucker rod, the bending and collision of the body, and the increase in the load. Under the condition that the pressure on the oil flow pipe wall remains unchanged, the existing rotary coupling cannot completely solve the problem of eccentric wear of the rod pump well wall due to its special structure and principle. The existing rotary oil well anti-eccentric wear downhole tools are particularly not suitable for pumping wells and directional inclined wells with eccentric wear above the neutral point of the sucker rod. The service life of the oil pipe and the sucker rod is short, and the wax scraping effect is not obvious. In addition, it is very easy to get stuck during the first use, which prolongs the pump inspection cycle and plays an effect of increasing production, saving energy and reducing consumption. Summary of the invention

[0003] The purpose of the present invention is to achieve remarkable straightening and anti-eccentric wear effects. The straightening sleeve made of alloy automatically rotates axially during the reciprocating motion of the sucker rod and automatically adjusts the inclination angle with the bending of the well wall, thereby ensuring the maximum fit with the well wall and preventing eccentric wear of the sucker rod and the inner wall of the oil pipe. The alloy straightening sleeve adopts a three-arc surface structure on the side, which changes the previous point or line friction between the coupling and the straightener and the inner wall of the oil pipe, reduces the resistance, and makes relative movement for the flake or mass wax points on the inner wall of the oil pipe, so that the wax points are separated from the inner wall of the oil pipe and discharged with the well fluid, thereby reducing the pump lifting pressure, reducing pump sticking, extending the pump inspection cycle, and increasing production and reducing consumption.

[0004] The technical solution adopted by the present invention is as follows: a rotary wear-resistant and corrosion-resistant three-arc sucker rod centralizer, comprising a main body, a limiting block extending outwardly from the middle of one side of the outer wall of the main body, a centralizing sleeve is rotatably sleeved at the outer wall of one end of the main body, and one side of the outer wall of the centralizing sleeve is attached to the outer wall of the limiting block, and the cross-section of the centralizing sleeve is an arc-shaped triangle, a reinforcing ring is sleeved on the outer wall of the end of the main body away from the centralizing sleeve, and three auxiliary scrapers are slidably embedded on the outer wall of the reinforcing ring, a rotating motor is installed on the inner wall of the end of the main body away from the centralizing sleeve through bolts, driving gears are rotatably arranged on both sides of the inner wall of the main body through connecting rods, a driving gear is rotatably arranged at the output end of the rotating motor through a rotating shaft, and a tooth groove is provided on one side of the outer wall of the driving gear, and the driving gear and the driving gear are meshed with each other for transmission, the driving gear is meshed with an auxiliary gear, and a rotating rod is fixedly arranged at the center of one end of the auxiliary gear.

[0005] Furthermore, three auxiliary rods are fixedly arranged on the outer wall of one end of the rotating rod, and one end of the three auxiliary rods is respectively fixedly arranged at the center of one side of the outer wall of the auxiliary scraper.

[0006] Furthermore, a crushing blade is fixedly provided at one end of the rotating motor via a rotating shaft, and the outer wall of the crushing blade is in contact with the outer wall of the main body.

[0007] Furthermore, the cross section of the auxiliary scraper is arc-shaped, and the outer wall of the auxiliary scraper is attached to the outer wall of the crushing blade.

[0008] Furthermore, an outer wall of one end of the main body close to the straightening sleeve is provided with an external mounting thread, and a plurality of fixing holes are provided at the edge of the outer wall of one end of the main body close to the straightening sleeve.

[0009] Furthermore, a limiting ring is provided on the outer wall of one end of the main body close to the straightening sleeve by installing an external threaded sleeve, and one side of the outer wall of the limiting ring is in contact with the straightening sleeve.

[0010] Furthermore, a plurality of circular holes are formed on the outer wall of the straightening sleeve, a plurality of fixing screws are threadedly connected to the outer wall of the straightening sleeve through the circular holes, and the bottom ends of the plurality of fixing screws are threadedly connected to the inner sides of the fixing holes.

[0011] Furthermore, anaerobic adhesive is attached to the top of the outer wall of the plurality of fixing screws, and anaerobic adhesive is attached to one side of the outer wall of the limiting ring.

[0012] Furthermore, the outer wall of one end of the main body away from the straightening sleeve is recessed inwardly.

[0013] Furthermore, outer walls at both ends of the straightening sleeve are recessed downwards.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] In the present invention, the alloy-made straightening sleeve has a remarkable straightening and anti-eccentric wear effect. During the reciprocating motion of the sucker rod, it automatically rotates axially and automatically adjusts the inclination angle with the bending of the well wall, thereby ensuring the maximum fit with the well wall and preventing eccentric wear of the sucker rod and the inner wall of the oil pipe. The alloy straightening sleeve adopts a three-arc surface structure on the side, which changes the previous point or line friction between the coupling and the straightening device and the inner wall of the oil pipe, reduces the resistance, and makes relative movement for the flake or mass wax points on the inner wall of the oil pipe, so that the wax points are separated from the inner wall of the oil pipe and discharged with the well fluid, thereby reducing the pump lifting pressure, reducing pump sticking, extending the pump inspection cycle, and increasing production and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2is a cross-sectional view of the present invention;

[0018] Figure 3 It is a side view of the driving gear of the present invention;

[0019] Figure 4 It is a front view of the main body of the present invention;

[0020] Figure 5 It is a side view of the stabilizing sleeve of the present invention;

[0021] Figure 6 It is a three-dimensional diagram of the crushing fan blade of the present invention.

[0022] Markings in the figure: 1. Main body; 2. Straightening sleeve; 3. Limiting ring; 4. Fixing screw; 5. Limiting block; 6. Reinforcement ring; 7. Auxiliary scraper; 8. Crushing fan blade; 9. Rotating motor; 10. Driving gear; 11. Auxiliary gear; 12. Rotating rod; 13. Active gear; 14. Auxiliary rod; 15. Tooth groove; 16. Fixing hole; 17. Installation external thread. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Embodiment 1, refer to Figures 1 to 6: A rotary wear-resistant and corrosion-resistant three-arc sucker rod centralizer comprises a main body 1, a limiting block 5 is extended outward from the middle of one side of the outer wall of the main body 1, and a centralizer sleeve 2 is rotatably sleeved on the outer wall of one end of the main body 1. Through the main body 1, the main body 1 itself can make the sucker rod directly connected, eliminating the previous connection coupling and centralizer, reducing the hidden dangers of the connection point, the main body 1 is made of high-quality 35CrMo alloy steel, the connecting thread is extruded once to enhance the connection strength, the two end surfaces are in the form of large arc chamfers, which is easy to install and reduces the intensity of the installation operation. The overall phosphating process is adopted to ensure that the thread will not be damaged or stuck during multiple disassembly operations, and multiple cycles The outer wall of the straightening sleeve 2 is fitted to the outer wall of the limiting block 5. The alloy straightening sleeve 2 is spray-welded with nickel-based alloy and clad by high-frequency heating. The surface is polished and presents a mirror effect. The relative movement resistance with the inner wall of the oil pipe is one thirtieth of that of ordinary sucker rod couplings and straighteners, and its own hardness HRC ≥ 65. During the reciprocating motion of the sucker rod and the inner wall of the oil pipe, the straightening sleeve 2 automatically rotates axially and maintains the maximum fit with the bending change of the oil pipe. The outer structure is three arc surfaces, each of which is equivalent to one-third of the arc surface of the inner wall of the oil pipe, and always maintains surface contact with the inner wall of the oil pipe, which changes the point or line contact between the ordinary coupling and the straightening sleeve and the inner wall of the oil pipe. The cross section of the straightening sleeve 2 is an arc-shaped triangle. The outer wall of the end of the main body 1 away from the straightening sleeve 2 is provided with a reinforcing ring 6. When installing the straightening sleeve 2 and the main body 1, the surface roughness must be ensured to be lower than RAL.6UM. Three auxiliary scrapers 7 are slidably embedded in the outer wall of the reinforcing ring 6. The inner wall of the end of the main body 1 away from the straightening sleeve 2 is provided with a rotating motor 9 by bolts. Driving gears 10 are provided on both sides of the inner wall of the main body 1 through connecting rod rotation. A driving gear 13 is provided at the output end of the rotating motor 9 through a rotating shaft, and a tooth groove 1 is provided on one side of the outer wall of the driving gear 13. 5, and the driving gear 13 and the driving gear 10 are meshed with each other for transmission, the driving gear 10 is meshed with an auxiliary gear 11, and a rotating rod 12 is fixedly arranged at the center of one end of the auxiliary gear 11, and three auxiliary rods 14 are fixedly arranged on the outer wall of one end of the rotating rod 12, and one end of the three auxiliary rods 14 is respectively fixedly arranged at the center of one side of the outer wall of the auxiliary scraper 7, and one end of the rotating motor 9 is fixedly arranged with a crushing blade 8 through a rotating shaft, and the outer wall of the crushing blade 8 is attached to the outer wall of the main body 1. Through the rotating rod 12, the auxiliary rod 14 and the auxiliary scraper 7, the inner wall of the oil pipe can be scraped back and forth to avoid the problem of jamming.

[0025] Example 2, refer to Figures 1 to 6: The cross-section of the auxiliary scraper 7 is arc-shaped, and the outer wall of the auxiliary scraper 7 is fitted to the outer wall of the crushing blade 8. An external mounting thread 17 is provided on the outer wall of one end of the main body 1 close to the straightening sleeve 2. Through the crushing blade 8 and the auxiliary scraper 7, the smoothness during the first straightening can be further improved to avoid the problem of jamming. A plurality of fixing holes 16 are provided on the edge of the outer wall of one end of the main body 1 close to the straightening sleeve 2. A limiting ring 3 is provided on the outer wall of one end of the main body 1 close to the straightening sleeve 2 through the external mounting thread 17, and one side of the outer wall of the limiting ring 3 is fitted to the straightening sleeve 2.

[0026] Example 3, refer to Figures 1 to 6 : The outer wall of the straightening sleeve 2 is provided with multiple circular holes, and the outer wall of the straightening sleeve 2 is threadedly connected with multiple fixing screws 4 through the circular holes, and the bottom ends of the multiple fixing screws 4 are threadedly connected to the inner side of the fixing hole 16, and anaerobic glue is attached to the top of the outer wall of the multiple fixing screws 4, and anaerobic glue is attached to one side of the outer wall of the limit ring 3. The outer wall of one end of the main body 1 away from the straightening sleeve 2 is recessed inward, and the working position of the limit ring 3 can be limited by the fixing screws 4.

[0027] When in use, the alloy-made straightening sleeve 2 automatically rotates axially during the reciprocating motion of the sucker rod and automatically adjusts the inclination angle with the bending of the well wall, thereby ensuring that the close fit with the well wall is maintained to the greatest extent and preventing eccentric wear of the sucker rod and the inner wall of the oil pipe. The alloy straightening sleeve 2 adopts a structure with three arc surfaces on the side, which changes the previous point or line friction between the coupling and the straightening device and the inner wall of the oil pipe, reduces the resistance and makes relative movement to the sheet or ball wax points on the inner wall of the oil pipe, so that the wax points are separated from the inner wall of the oil pipe and discharged with the well fluid, thereby reducing the pump lifting pressure, reducing pump jams, extending the pump inspection cycle, increasing production and reducing consumption. When descending for the first time, the rotating motor 9 is started to drive the crushing fan blades 8 to stably crush and throw out the debris directly below the straightening device, and through the driving gear 10, the auxiliary gear 11 and the active gear 13, the auxiliary scraper 7, the rotating rod 12 and the auxiliary rod 14 are driven to rotate, so as to achieve intermittent scraping of the outer wall of the oil pipe, and the limiting block 5 and the limiting ring 3 can prevent the straightening sleeve 2 from slipping.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary anti-wear and anti-corrosion three-cambered sucker rod centralizer, comprising a main body (1), characterized in that: A limiting block (5) is provided in the middle of one side of the outer wall of the main body (1) extending outwards, a straightening sleeve (2) is rotatably sleeved on the outer wall of one end of the main body (1), and one side of the outer wall of the straightening sleeve (2) is in contact with the outer wall of the limiting block (5), and the cross-section of the straightening sleeve (2) is an arc-shaped triangle, a reinforcing ring (6) is sleeved on the outer wall of the end of the main body (1) away from the straightening sleeve (2), and three auxiliary scrapers (7) are slidably embedded on the outer wall of the reinforcing ring (6), and the inner wall of the end of the main body (1) away from the straightening sleeve (2) is provided with a straightening sleeve (6) and a straightening sleeve (6 ... A rotating motor (9) is installed with bolts, driving gears (10) are rotatably arranged on both sides of the inner wall of the main body (1) through connecting rods, a driving gear (13) is rotatably arranged on the output end of the rotating motor (9) through a rotating shaft, and a tooth groove (15) is provided on one side of the outer wall of the driving gear (13), and the driving gear (13) and the driving gear (10) are meshed and transmitted with each other, and an auxiliary gear (11) is meshed with the driving gear (10), and a rotating rod (12) is fixedly arranged at the center of one end of the auxiliary gear (11).

2. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 1 is characterized in that: Three auxiliary rods (14) are fixedly arranged on the outer wall of one end of the rotating rod (12), and one end of the three auxiliary rods (14) is respectively fixedly arranged at the center of one side of the outer wall of the auxiliary scraper (7).

3. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 2 is characterized in that: A crushing blade (8) is fixedly provided at one end of the rotating motor (9) via a rotating shaft, and the outer wall of the crushing blade (8) is in contact with the outer wall of the main body (1).

4. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 3 is characterized in that: The cross section of the auxiliary scraper (7) is in the shape of an arc, and the outer wall of the auxiliary scraper (7) is in contact with the outer wall of the crushing blade (8).

5. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 4 is characterized in that: An outer wall of one end of the main body (1) close to the straightening sleeve (2) is provided with an external mounting thread (17), and a plurality of fixing holes (16) are provided at the edge of the outer wall of one end of the main body (1) close to the straightening sleeve (2).

6. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 5 is characterized in that: A limiting ring (3) is provided on the outer wall of one end of the main body (1) close to the straightening sleeve (2) by installing an external thread (17), and one side of the outer wall of the limiting ring (3) is in contact with the straightening sleeve (2).

7. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 6 is characterized in that: The outer wall of the straightening sleeve (2) is provided with a plurality of circular holes, and the outer wall of the straightening sleeve (2) is threadedly connected with a plurality of fixing screws (4) through the circular holes, and the bottom ends of the plurality of fixing screws (4) are threadedly connected to the inner side of the fixing holes (16).

8. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 7 is characterized in that: Anaerobic adhesive is attached to the top of the outer wall of the plurality of fixing screws (4), and anaerobic adhesive is attached to one side of the outer wall of the limiting ring (3).

9. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 8 is characterized in that: The outer wall of one end of the main body (1) away from the straightening sleeve (2) is recessed inwards.

10. The rotary wear-resistant and corrosion-resistant three-cambered sucker rod centralizer according to claim 9 is characterized in that: The outer walls at both ends of the straightening sleeve (2) are both recessed downwards.