Rolling wear-resistant belt for deep well, long horizontal well and preparation method thereof

Abstract

The invention relates to a rolling wear-resistant belt for a deep well long horizontal well and a preparation method of the rolling wear-resistant belt, and relates to the field of earth deep exploration high-end drilling equipment.The rolling wear-resistant belt for the deep well long horizontal well comprises a plurality of roller sleeves arranged on the outer side of a drill rod body in a sleeving mode, and a first lining and a second lining are arranged on the two axial sides of each roller sleeve correspondingly; the roller sleeve, the first lining and the second lining are all located in a mounting groove formed in the outer side of the drill rod body. A plurality of blade teeth which are arranged in a spiral guiding mode are fixed to the roller sleeve in the circumferential direction, and the outer surfaces of the blade teeth are all covered with self-lubricating diamond composite abrasion-resistant strips in a fusion covering mode. The wear-resistant strip comprises a hard phase and a binding phase, the hard phase is a diamond strip block, and the binding phase is a corrosion-resistant metal alloy; and the binding phase is a nickel-based alloy, a copper-based alloy or a silver-based alloy. The device has the advantages that the phenomena of buckling locking, column descending difficulty, bit pressure applying difficulty and the like are not prone to occurring during column descending of a well entering pipe column, and the effect of improving the oil and gas exploitation efficiency is achieved.

Description

Technical Field

[0001] This application relates to the field of high-end drilling equipment for deep earth exploration, and in particular to rolling wear-resistant belts for long horizontal wells in deep wells and their preparation methods. Background Technology

[0002] In recent years, the exploration and development of oil and gas resources has gradually moved towards deeper and ultra-deep formations. Meanwhile, horizontal well technology can significantly increase the exploitable area of ​​oil-bearing formations, improve oil and gas production and recovery rates, and is of great significance for improving the economic benefits of oil fields. With continuous technological advancements, the length of the horizontal section of horizontal wells and the depth of vertical wells are also constantly increasing, which places higher demands on drilling equipment and technology.

[0003] In deep and long well drilling operations, the complex wellbore trajectory and the contact problem between the drill string and the wellbore have always been a challenging issue for the industry. To address the difficulty of downhole string placement in complex wellbore trajectories, a common solution is to use downhole traction tools. These tools actively pull the drill string towards the bottom of the well by providing traction force at the bottom of the well. However, most traction tools used in horizontal well drilling are currently in the development and testing phase, lacking practical application cases and experience. This makes it difficult to find reliable traction tools in actual drilling operations to solve the problem of the drill string buckling and locking due to excessive contact area with the wellbore, and the difficulty of running the drill string, severely impacting the efficiency of oil and gas extraction. Summary of the Invention

[0004] In order to prevent buckling and locking, difficulty in setting the tubing string, and difficulty in applying drilling pressure during well running, and to improve the efficiency of oil and gas extraction, this application provides a rolling wear-resistant strip for deep wells and long horizontal wells and its preparation method.

[0005] In a first aspect, this application provides a rolling wear-resistant strip for deep horizontal wells, employing the following technical solution: A rolling wear-resistant belt for deep horizontal wells includes multiple roller sleeves fitted on the outside of the drill pipe body. The roller sleeves have a first bushing and a second bushing on their axial sides, respectively. The roller sleeves, the first bushing, and the second bushing are all located in the mounting groove opened on the outside of the drill pipe body. The roller sleeves are circumferentially fixed with multiple spirally guided cutting teeth, and the outer surface of each cutting tooth is coated with a self-lubricating diamond composite wear-resistant strip.

[0006] By adopting the above technical solution, during the installation of the drill string, the roller sleeve of the rolling wear-resistant belt for deep horizontal wells tends to rotate due to the friction between the drill pipe and itself. Because the roller sleeve is circumferentially fixed with spirally guided cutting teeth, and the outer surface of the cutting teeth is coated with a self-lubricating diamond composite wear-resistant strip, when the outer side of the roller sleeve contacts the well wall / casing and is subjected to friction, the special cutting tooth structure converts part of the frictional force into axial thrust towards the bottom of the drill pipe. Depending on the deflection direction of the cutting tooth structure, this axial thrust is transmitted to adjacent roller sleeves through the first and second bushings. The thrust from multiple roller sleeves is transmitted together towards the bottom of the drill string until it acts on the drill pipe, achieving drag reduction and pressurization. The self-lubricating diamond composite wear-resistant strip clad on the outer side of the roller sleeve reduces friction between the roller sleeve and the wellbore / casing, and gives the cutting teeth excellent wear resistance. During operation, some of the strip is converted into graphite to act as a lubricant, reducing wear caused by friction between the roller sleeve and the wellbore / casing, protecting the cutting tooth structure, and preventing the tubing string from jamming due to excessive friction. At the same time, the unique roller and cutting tooth structures convert some of the friction force into axial thrust, providing assistance to the tubing string and making it easier to move downwards. This significantly improves the efficiency of running the tubing string, shortens the operation time, reduces mining costs, and reduces damage to the drill string caused by problems such as tubing string jamming, extending the service life of the drill string. A stable running string process helps ensure the smooth progress of drilling operations and improves overall mining efficiency and safety.

[0007] Optionally, the wear-resistant strip includes a hard phase and a binder phase, wherein the hard phase is diamond strips and the binder phase is a corrosion-resistant metal alloy.

[0008] By adopting the above technical solution, diamond blocks provide excellent wear resistance, and the corrosion-resistant metal alloy binder phase ensures long-term stability in corrosive environments. The two work together to achieve a protective effect on the drill string structure. At the same time, the diamond accumulates energy and generates heat under impact and wear with the well wall / casing, and under the catalysis of the ferrite contained in the tubing string, it undergoes partial graphitization, which lubricates the frictional contact between the roller sleeve and the drill pipe body, and between the roller sleeve and the well wall / casing, reducing the coefficient of friction and further optimizing the protective effect.

[0009] Optionally, the binder phase is a binder composite material prepared from a nickel-based alloy, a copper-based alloy, or a silver-based alloy.

[0010] By adopting the above technical solution, using nickel-based alloys, copper-based alloys, or silver-based alloys as the binder phase, the binder phase has extremely strong bonding strength, resistance to pitting corrosion, and resistance to stress corrosion, ensuring the long-term stability of the wear-resistant strip in a corrosive environment. At the same time, it achieves a synergistic protective effect of "1+1>2" with the hard phase composed of diamond blocks, protecting the drill bit structure and optimizing the protective effect.

[0011] Optionally, a friction pair is formed between the inner surface of the roller sleeve and the outer wall of the drill rod, and the contact area of ​​the friction pair is also coated with a self-lubricating diamond composite wear-resistant strip.

[0012] By adopting the above technical solution, friction inevitably exists between the drill pipe body and the roller sleeve. When torque is transmitted from the drill pipe body to the bottom of the drill pipe, the friction pair structure formed between the inner surface of the roller sleeve and the outer wall of the drill pipe will generate friction between them. This friction will cause the roller sleeve to rotate. The wear-resistant strip has the superior wear resistance of diamond, and a self-lubricating diamond composite wear-resistant strip is fused into the contact area of ​​this friction pair. During operation, the wear-resistant strip can be partially converted into graphite under the catalysis of ferrite, playing a lubricating role. It can effectively protect the contact parts between the roller sleeve and the drill pipe body, greatly reduce torque jamming, and reduce wear caused by friction between the roller sleeve and the drill pipe body, thus extending the working life of the drill bit.

[0013] Optionally, the length direction of the wear-resistant strip on the outer side of the cutting tooth is arranged along the direction perpendicular to the spiral line of the cutting tooth, and the length direction of the wear-resistant strip on the inner side of the roller sleeve is arranged along the direction perpendicular to the axial direction of the roller sleeve.

[0014] By adopting the above technical solution, setting the length direction of the wear-resistant strip on the outer side of the cutting edge along the direction perpendicular to the spiral line of the cutting edge, it can better adapt to the spiral guiding structure of the cutting edge. During the rotation of the roller sleeve, the wear-resistant strip can more evenly bear the frictional force with the well wall / casing, reducing wear on the outer side of the cutting edge and protecting the cutting edge structure. Setting the length direction of the wear-resistant strip on the inner side of the roller sleeve along the axial direction perpendicular to the roller sleeve can maximize the coverage of the contact area between the roller sleeve and the drill pipe body when they rotate relative to each other, reducing friction between the roller sleeve and the drill pipe body, reducing torque transmission jamming, ensuring stable torque transmission, and reducing drill pipe body vibration and drill bit slippage.

[0015] Optionally, the helix angle of the cutting tooth is 15° to 30°.

[0016] By adopting the above technical solution, this helix angle range can ensure a stable drag-reducing and pressurizing drilling process in long horizontal well operations. When the friction between the drill pipe body and the roller sleeve causes the roller sleeve to rotate, and the cutting teeth on the outer side of the roller sleeve rub against the well wall / casing, it can more effectively convert some of the friction force into axial thrust towards the bottom of the drill string. If the helix angle is too small, the generated axial thrust will be insufficient, and a good drag-reducing and pressurizing effect cannot be achieved; if the helix angle is too large, it will lead to unstable contact between the cutting teeth and the well wall / casing, affecting the normal operation of the drill string and even increasing the wear of the drill string.

[0017] Optionally, the first bushing has a plurality of bushing holes evenly spaced along the circumference of the first bushing on the side near the second bushing.

[0018] By adopting the above technical solution, multiple bushing holes can store lubricating media such as lubricating oil. During the operation of the drill bit, the lubricating media can better lubricate the contact parts between the roller sleeve, the first bushing, and the second bushing, reducing the frictional resistance and wear between the components.

[0019] Optionally, the cross-section of the cutting tooth is an arc-shaped cross-section, and the cutting tooth has an arc-shaped structure that is thin at both sides and thick in the middle along its length direction.

[0020] By adopting the above technical solution, the cross-section of the cutting tooth is an arc-shaped cross-section and the length direction is an arc-shaped structure that is thin at both ends and thick in the middle. This unique structure with a thick middle enhances the strength and stability of the cutting tooth, enabling it to withstand greater pressure and impact, and making it less prone to damage. In addition, the arc-shaped structure also allows the cutting tooth to better convert some of the frictional force into axial thrust during rotation, thereby improving the drag reduction and pressurization effect of the drill bit.

[0021] Secondly, this application provides a method for preparing a rolling wear-resistant strip for a long horizontal well in a deep well, applicable to the aforementioned rolling wear-resistant strip for a long horizontal well, comprising the following steps: CNC machining of a roller sleeve; surface treatment of the inner surface of the roller sleeve and the outer surface of the cutting teeth, followed by cleaning and drying of the roller sleeve surface; and brazing the wear-resistant strip onto a designated part of the roller sleeve.

[0022] By adopting the above technical solution, after surface treatment of the inner surface of the roller sleeve and the outer surface of the cutting tooth, a diamond composite wear-resistant strip is formed by vacuum brazing. This allows the wear-resistant strip to better adhere to the surfaces of the roller sleeve and the cutting tooth. The brazing treatment of the wear-resistant strip enables the pores and microcracks inside the wear-resistant strip to undergo plastic deformation and diffusion welding under high temperature and high pressure, so that its relative density reaches more than 99.8%, making it a nearly completely dense structure. This effectively reduces the wear of the drill rod and the roller, greatly extends the working life of the drill bit, and reduces drilling costs.

[0023] Optionally, the brazing is performed in a vacuum environment, at a temperature of 600-1150℃ and a pressure of 10. -2 -10 -3 The pressure and heat treatment time is 30-60 minutes, and the vacuum is maintained while the temperature is naturally cooled to room temperature.

[0024] By employing the above-mentioned technical solution and performing brazing in a vacuum environment, the wear-resistant strip can avoid oxidation, hydrolysis, and other chemical reactions with oxygen and moisture in the air under high temperature and high pressure, thus preventing damage to its performance. This temperature range allows the pores and microcracks inside the wear-resistant strip to have sufficient energy to undergo plastic deformation. At this temperature, the material atoms have a certain degree of activity and can undergo diffusion motion, creating conditions for subsequent diffusion welding. This then promotes the pores and microcracks to approach and combine with each other during plastic deformation. Holding pressure ensures that the pores and microcracks inside the material have sufficient time to complete the plastic deformation and diffusion welding process under high temperature and high pressure, thereby achieving a high level of relative density and bonding strength for the wear-resistant strip.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The self-lubricating diamond composite wear-resistant strip clad on the outer side of the roller sleeve reduces friction between the roller sleeve and the well wall / casing, and gives the cutting teeth excellent wear resistance. During operation, some of the strip is converted into graphite to act as a lubricant, reducing wear caused by friction between the roller sleeve and the well wall / casing, protecting the cutting tooth structure, and preventing the tubing string from jamming due to excessive friction. At the same time, the unique roller and cutting tooth structure converts some of the friction force into axial thrust, providing assistance to the tubing string and making it easier to move downwards. This can significantly improve the efficiency of running the tubing string, shorten the operation time, reduce the mining cost, and reduce the damage to the drill string caused by problems such as tubing string jamming, thus extending the service life of the drill string. A stable running string process helps to ensure the smooth progress of drilling operations and improves the overall mining efficiency and safety. Diamond blocks offer excellent wear resistance and strength, while the corrosion-resistant metallic alloy binder phase ensures long-term stability in corrosive environments. Together, they provide protection for the drill string structure. Simultaneously, the diamond undergoes partial graphitization under the catalysis of ferrite, lubricating the frictional contact between the roller sleeve and the drill pipe body, and between the roller sleeve and the wellbore / casing, reducing the coefficient of friction and further optimizing the protective effect. Furthermore, the hard phase composed of the binder phase and the diamond blocks achieves a synergistic protective effect of "1+1>2," protecting the drill string structure and optimizing the overall protection. After surface treatment of the inner surface of the roller sleeve and the outer surface of the cutting edge, vacuum brazing is performed to form a diamond composite wear-resistant strip, which allows the wear-resistant strip to better adhere to the surface of the roller sleeve and the cutting edge. The wear-resistant strip is subjected to heat preservation and pressure preservation treatment, which enables the pores and microcracks inside the wear-resistant strip to undergo plastic deformation and diffusion welding under high temperature and high pressure, so that its relative density reaches more than 99.8%, making it a nearly completely dense structure. This effectively reduces the wear of the drill rod and roller, greatly extends the working life of the drill bit, and reduces drilling costs. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of the rolling wear-resistant belt for deep horizontal wells in this application; Figure 2 This is a partial cross-sectional view showing the rolling wear-resistant belt used in long horizontal wells in deep wells; Figure 3 This is a schematic diagram showing the force at a certain point on the cutting edge of the roller sleeve; Figure 4 This is a schematic diagram illustrating the force transmission process of multiple roller sleeves; Figure 5 This is a schematic diagram showing the structure of the roller sleeve in the working state; Figure 6 This is a schematic diagram showing the structure of the roller sleeve; Figure 7 This is a structural schematic diagram showing the roller sleeve from another perspective; Figure 8 It means Figure 7 A cross-sectional view along the AA direction.

[0027] Explanation of reference numerals in the attached drawings: 1. Drill rod body; 11. Mounting groove; 2. Roller sleeve; 3. First bushing; 31. Bushing hole; 4. Second bushing; 5. Cutting tooth; 6. Wear-resistant strip. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0029] This application discloses a rolling wear-resistant belt for long horizontal deep wells. (Refer to...) Figure 1 and Figure 2 The rolling wear-resistant belt for deep horizontal wells includes multiple roller sleeves 2 fitted onto the outside of the drill pipe body 1, and a first bushing 3 and a second bushing 4 located on both axial sides of the roller sleeves 2. The roller sleeves 2, first bushing 3, and second bushing 4 are all located within mounting grooves 11 opened on the outside of the drill pipe body 1. This arrangement ensures that the roller sleeves 2 can be stably installed on the drill pipe body 1, guaranteeing the stability and reliability of the entire wear-resistant belt structure. Specifically, multiple bushing holes 31 are evenly spaced along the circumference of the first bushing 3 on the side near the second bushing 4. These bushing holes 31 can store lubricating media such as lubricating oil. During drilling operations, the lubricating media can better lubricate the contact areas between the roller sleeves 2, the first bushing 3, and the second bushing 4, reducing frictional resistance and wear between components.

[0030] Reference Figure 2 and Figure 3Specifically, the roller sleeve 2 has multiple spirally guided cutting teeth 5 fixed circumferentially. The outer surface of each cutting tooth 5 is coated with a self-lubricating diamond composite wear-resistant strip 6, which protects the cutting teeth 5 and reduces friction. The spiral guiding arrangement of the cutting teeth 5 is one of its key features. When the roller sleeve 2 contacts the well wall or casing, it can convert some of the frictional force into axial thrust. For example, when the drill pipe body 1 rotates, the roller sleeve 2 rotates along with it. The contact between the cutting teeth 5 and the well wall generates friction, and the spiral structure of the cutting teeth 5 decomposes this frictional force into an axial component. This component becomes the thrust towards the bottom of the drill pipe, helping the drill pipe to drill downwards more effectively. The helix angle of the cutting teeth 5 is 15° to 30°. Within this range, it ensures that the frictional force is effectively converted into axial thrust, while preventing the contact area between the cutting teeth 5 and the well wall from being too small due to an excessively large helix angle, thus affecting the thrust generation effect. The Blade 5 is made of high-strength alloy steel, such as titanium alloy, which can withstand the enormous pressure during the drilling process.

[0031] Reference Figures 2-5 The roller sleeve 2 is mounted on the drill pipe body 1, effectively reducing the impact of uneven well walls causing the drill pipe body 1 to jam, thus preventing torque transmission from being obstructed or discontinuous. When the roller sleeve 2 encounters excessive jamming resistance, a friction pair is formed between the inside of the roller sleeve 2 and the drill pipe body 1. Due to its self-lubricating friction properties, this effectively reduces torque transmission loss, ensures the continuity of torque transmission, and thus improves drilling quality. The structure of multiple single-acting roller sleeves 2 ensures that the device can continuously provide thrust. When a single roller sleeve 2 generates axial thrust, it is transmitted to the next roller sleeve 2 through the first bushing 3 and the second bushing 4, and finally to the drill pipe body 1, thereby propelling the entire device to generate thrust. The multiple single-acting roller sleeves 2 structure can simultaneously avoid affecting the overall structural function due to unevenness such as notches or protrusions on the well wall / casing surface. When traversing uneven well sections, a few roller sleeves 2 may become stuck or spin freely. Spinning roller sleeves 2 do not generate thrust, while stuck roller sleeves 2, due to their continued rotational tendency, do not affect their ability to generate axial thrust. The mating structure between the roller sleeves 2 and the drill pipe body 1 ensures that when the roller sleeves 2 become stuck, the torque can be smoothly transmitted downwards, driving the bottom drill string to rotate. This reduces the risk of drill pipe body 1 jamming and stick-slip vibration during drilling, effectively protecting the drilling equipment while significantly improving drilling quality.

[0032] Reference Figure 6 and Figure 7The cross-section of the cutting tooth 5 is arc-shaped, and the length direction of the cutting tooth 5 has an arc-shaped structure that is thin at both ends and thick in the middle. The unique structure of the thick middle enhances the strength and stability of the cutting tooth 5, enabling it to withstand greater pressure and impact, and making it less prone to damage. In addition, the arc-shaped structure also allows the cutting tooth 5 to better disperse pressure during rotation and better convert some of the friction force into axial thrust, thereby improving the drag reduction and pressurization effect of the drill bit.

[0033] The wear-resistant strip 6 comprises a hard phase and a binder phase. The hard phase consists of diamond blocks with a volume fraction of 30-50%, exhibiting superior wear resistance and effectively resisting wear from the wellbore and casing on the cutting tooth 5. The binder phase is a corrosion-resistant metal alloy, such as a nickel-based alloy (preferably Inconel 625 or Hastelloy C276), a copper-based alloy (preferably CuSnTi), or a silver-based alloy (preferably AgCuTi4.5). The binder phase possesses extremely strong resistance to pitting and stress corrosion, achieving a synergistic protective effect of "1+1>2" with the diamond-based hard phase. Its cladding process can employ vacuum brazing technology. Under the catalysis of ferrite, the diamond undergoes partial graphitization, lubricating the frictional contact between the roller sleeve 2 and the drill pipe body 1, and between the roller sleeve 2 and the wellbore / casing, reducing the coefficient of friction. The length direction of the wear-resistant strip 6 on the outer side of the cutting tooth 5 is set perpendicular to the helix of the cutting tooth 5, better protecting the surface of the cutting tooth 5 and improving its wear resistance and service life.

[0034] Specifically, refer to Figure 6 and Figure 8 A friction pair is formed between the inner surface of the roller sleeve 2 and the outer wall of the drill rod body 1. The contact area of ​​this friction pair is also coated with a self-lubricating diamond composite wear-resistant strip 6. The length direction of the wear-resistant strip 6 on the inner side of the roller sleeve 2 is perpendicular to the axial direction of the roller sleeve 2, used to reduce friction and wear between the roller sleeve 2 and the drill rod body 1, and to reduce axial friction between the roller sleeve 2 and the drill rod body 1, ensuring smooth torque transmission. Friction is unavoidable between the drill rod body 1 and the roller sleeve 2. When torque is transmitted from the drill rod body 1 to the bottom of the drill rod, the friction pair structure formed between the inner surface of the roller sleeve 2 and the outer wall of the drill rod body 1 will generate friction between them. This friction will cause the roller sleeve 2 to rotate.

[0035] This application also discloses a method for preparing a rolling wear-resistant belt for deep horizontal wells, comprising the following steps: S1. The roller sleeve 2 is CNC machined. After surface treatment of the inner surface of the roller sleeve 2 and the outer surface of the cutting teeth 5, the surface of the roller sleeve 2 is cleaned and dried. Then, the wear-resistant strip 6 is vacuum brazed onto the designated part of the roller sleeve 2. Surface treatment is to ensure good bonding between the wear-resistant strip 6 and the surfaces of the roller sleeve 2 and the cutting teeth 5. The surface can be cleaned first to remove oil, impurities, etc., and then roughened, such as by sandblasting, to increase the surface roughness and improve the bonding strength of the weld. Vacuum brazing uses high temperature, high pressure, and high vacuum to melt the wear-resistant material and fuse it with the base material to form a high-quality cladding layer.

[0036] S2, Brazing is performed on the wear-resistant strip 6. The brazing process is carried out in a vacuum environment at a temperature of 600-1150℃ and a vacuum degree of 10. -2 - 10 -3 The pressure is maintained at 30-60 minutes. During this process, the vacuum acts as a protective barrier, preventing the wear-resistant strip 6 from undergoing oxidation, hydrolysis, or other chemical reactions with oxygen and moisture in the air under high temperature and pressure, thus preventing damage to its performance. The high temperature and pressure environment allows the pores and microcracks inside the wear-resistant strip 6 to undergo plastic deformation and diffusion welding, resulting in a relative density of over 99.8%, creating a nearly completely dense structure, thereby improving the bonding strength and wear resistance of the wear-resistant strip 6.

[0037] The implementation principle of the rolling wear-resistant belt for deep horizontal wells and its preparation method in this application is as follows: When the tubing string is lowered into the well, the roller sleeve 2 of the rolling wear-resistant belt for deep horizontal wells tends to rotate due to the friction between the drill pipe body 1 and itself. Since the roller sleeve 2 is circumferentially fixed with spirally guided cutting teeth 5, and the outer surface of the cutting teeth 5 is coated with a self-lubricating diamond composite wear-resistant strip 6, when the outer side of the roller sleeve 2 contacts the well wall / casing and is subjected to friction, the special cutting tooth 5 structure converts part of the friction force into axial thrust towards the bottom of the drill pipe. According to the deflection direction of the cutting tooth 5 structure, this axial thrust is transmitted to adjacent roller sleeves 2 through the first bushing 3 and the second bushing 4. The thrust on multiple roller sleeves 2 is transmitted together to the bottom of the drill string until it acts on the drill pipe body 1, achieving a drag-reducing and pressurizing drilling effect. The unique design of the roller sleeve 2 and the cutting tooth 5 structure reduces jamming during torque transmission, ensuring that the torque can be stably transmitted to the bottom of the drill pipe. Meanwhile, the self-lubricating diamond composite wear-resistant strip 6 clad on the roller sleeve 2 reduces friction and wear between components. The wear-resistant strip 6 possesses the superior wear resistance of diamond, and during operation, under the catalysis of ferrite, it can partially transform into graphite, playing a lubricating role. It can effectively protect the contact area between the roller sleeve 2 and the drill rod body 1, greatly reduce torque jamming, and reduce wear caused by friction between the roller sleeve 2 and the drill rod body 1, thus extending the working life of the drill bit.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rolling wear-resistant strip for a deep well long horizontal well, characterized by, The application relates to a rolling wear-resistant band for a deep well long horizontal well, which comprises a plurality of roller sleeves (2) sleeved outside a drill rod body (1), a first bushing (3) and a second bushing (4) are arranged on the two axial sides of the roller sleeve (2) respectively, the roller sleeve (2), the first bushing (3) and the second bushing (4) are arranged in a mounting groove (11) formed outside the drill rod body (1), a plurality of blade teeth (5) are fixed on the roller sleeve (2) in a spiral direction, and a self-lubricating diamond composite wear-resistant strip (6) is fused on the outer surface of the blade teeth (5).

2. The rolling wear-resistant strip for a deep-well long-horizontal-well according to claim 1, characterized by, The wear-resistant strip (6) comprises a hard phase and a bonding phase, the hard phase is a diamond strip, and the bonding phase is a corrosion-resistant metal alloy.

3. The rolling wear-resistant strip for a deep-well long-horizontal-well according to claim 2, characterized by, The bonding phase is a bonding composite material prepared from a nickel-based alloy, a copper-based alloy or a silver-based alloy.

4. The rolling wear-resistant strip for a deep-well long-horizontal-well according to claim 1, characterized by, A friction pair is formed between the inner surface of the roller sleeve (2) and the outer wall of the drill rod body (1), and a self-lubricating diamond composite wear-resistant strip (6) is fused on the contact area of the friction pair.

5. The rolling wear-resistant strip for a deep well long horizontal well of claim 4, wherein, The length direction of the wear-resistant strip (6) outside the blade teeth (5) is arranged in a direction perpendicular to the spiral line of the blade teeth (5), and the length direction of the wear-resistant strip (6) inside the roller sleeve (2) is arranged in a direction perpendicular to the axial direction of the roller sleeve (2).

6. The rolling wear-resistant strip for a deep-well long-horizontal-well according to claim 1, characterized by, The spiral angle of the blade teeth (5) is 15-30 degrees.

7. The rolling wear-resistant strip for a deep-well long-horizontal-well according to claim 1, characterized by, A plurality of bushing holes (31) are uniformly and spacedly arranged on the side of the first bushing (3) close to the second bushing (4) in the circumferential direction of the first bushing (3).

8. The rolling wear-resistant strip for a deep well long horizontal well of claim 1, wherein, The cross section of the blade teeth (5) is an arc-shaped cross section, and the blade teeth (5) have an arc-shaped structure with thin edges and a thick middle part in the length direction.

9. A method for manufacturing a rolling wear-resistant strip for a deep well long horizontal well, characterized by, The application further relates to a method for manufacturing the rolling wear-resistant band, which comprises the following steps: numerically controlling the manufacture of the roller sleeve (2); performing surface treatment on the inner surface of the roller sleeve (2) and the outer surface of the blade teeth (5), cleaning and drying the surface of the roller sleeve (2); and fusing the wear-resistant strip (6) on the specified part of the roller sleeve (2) through brazing.

10. The method of claim 9, wherein the rolling wear-resistant tape for a deep well long horizontal well is prepared by the steps of: The brazing is carried out in a vacuum environment, the brazing temperature is 600-1150℃, the pressure is 10 -2 -10 -3 Pa, the holding and pressure maintaining time is 30-60 minutes, and the natural cooling to normal temperature is kept under the vacuum degree. ​

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