A kind of intelligent push plate for pilot system

Abstract

The utility model discloses a kind of push-plate for intelligent rotary guide system, including push-plate body, two ends of the two inner holes of push-plate body are respectively provided with wear-resistant sleeve connected in detachable mode, the middle part of wear-resistant sleeve is equipped with the mounting hole for pin shaft to pass through.The push-plate for intelligent rotary guide system provided by the utility model not only can effectively improve the wear resistance of push-plate friction part, but also has the advantages of simple processing process, low processing cost and simple maintenance scheme.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling technology, and in particular to a push plate for an intelligent rotary guide system. Background Technology

[0002] The push plate is a core component of the push-off offset mechanism in the intelligent rotary steering system. Located outside the drill pipe, it is adjacent to bearings such as LWD, MWD, TC, and PDC. The intelligent rotary steering system utilizes a hydraulic system to push the push plate, which opens and closes on its base, causing it to contact the wellbore and generate a radial offset force, thus turning the drill bit and achieving high-precision directional drilling. This is far more efficient than traditional bending joint tools and is widely used. The base material of the push plate is ordinary steel. The push plate and its matching "push plate base" are fixed and connected by a pin passing through the inner hole between them. During operation, the push plate rotates around the pin as its center of rotation within the push plate base. During frequent opening and closing, the contact surfaces between the push plate and the base experience frequent friction, and these surfaces are contaminated by drilling fluid, magma, and other substances, causing erosion. If the contact surfaces wear severely, the axial clearance between the push plate and the base will increase, leading to axial displacement of the push plate. This can result in the risk of failure for all connecting parts and mating components of the push plate. Due to the high temperature and high pressure in the underground environment and the harsh working conditions, the contact surfaces of the push plate and the push plate base must have high wear resistance and high erosion resistance to ensure their performance and service life.

[0003] To improve the wear resistance of the friction parts of the push plate, the conventional approach is to use supersonic flame spraying to coat this area with a layer of wear-resistant material, thereby enhancing its wear and erosion resistance. However, the hardened surface layer formed by supersonic flame spraying is difficult to process, involves complex processes, is costly, and is even more difficult to repair after failure, resulting in extremely high rework costs and poor feasibility. Therefore, finding a new method to replace the existing supersonic flame spraying process for improving the wear resistance of the friction parts of the push plate is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a push plate for an intelligent rotary guide system, which can not only effectively improve the wear resistance of the friction parts of the push plate, but also has the advantages of simple processing, low processing cost and convenient maintenance solution.

[0005] The technical solution provided by this utility model is as follows: A push plate for an intelligent rotary guide system includes a push plate body. The two ends of the two inner holes of the push plate body are respectively provided with wear-resistant sleeves that are detachably connected. The middle of the wear-resistant sleeve is provided with a mounting hole for a pin shaft to pass through.

[0006] Preferably, the two inner holes of the push plate body are respectively provided with recessed platforms at both ends, and the wear-resistant sleeve is disposed in the recessed platforms.

[0007] Preferably, when the wear-resistant sleeve is inside the recessed platform, the outer surface of the wear-resistant sleeve is flush with or protrudes 0.2 to 0.3 mm from the side of the push plate body.

[0008] Preferably, the outer circle of the wear-resistant sleeve is connected to the inner hole of the push plate body by an interference fit.

[0009] Preferably, the interference fit between the outer circle of the wear-resistant sleeve and the inner hole of the push plate body is 0.01 to 0.03 mm.

[0010] Preferably, the wear-resistant sleeve has a T-shaped structure, and the wear-resistant sleeve includes one of the following: alloy sleeve, steel sleeve, ceramic sleeve, cubic boron nitride sleeve, and diamond sleeve with a T-shaped structure.

[0011] Preferably, the thickness of the T-shaped horizontal portion of the wear-resistant sleeve is 2-4 mm.

[0012] Preferably, the wall thickness of the T-shaped vertical portion of the wear-resistant sleeve is 2-4 mm.

[0013] Preferably, the height of the wear-resistant sleeve is equal to half the width L of the opening and closing part of the push plate body.

[0014] Preferably, the wear-resistant sleeve is an integral structure.

[0015] This invention has the following advantages over the prior art: The push plate in this invention's intelligent rotary guide system primarily addresses the technological limitations of existing spraying methods. These limitations include narrow and irregularly shaped spraying areas, restricted spraying accessibility, low powder application rate, susceptibility to hard surface defects, complex processing of the sprayed layer and steel components, poor quality stability, and limited feasibility for subsequent maintenance. In existing technologies, similar products all employ spraying technology. This invention represents a first-time application of a detachable wear-resistant sleeve, mounting holes, countersunk platform, and corresponding connection methods to the push plate and its base, a completely new design entirely different from existing spraying techniques. This invention uses a more wear-resistant and erosion-resistant sleeve instead of the existing specially sprayed wear-resistant layer, resulting in superior wear and erosion resistance and a longer service life. Furthermore, once the wear-resistant sleeve wears out, only a new one needs to be replaced; the repair process is simple, highly operable, low-cost, and does not affect the precision of the parts themselves. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the push plate used in the intelligent rotary guide system in this embodiment of the present invention; Figure 2 This is a partial structural diagram of the push plate used in the intelligent rotary guide system in this embodiment of the present invention.

[0018] Figure label: 1. Push plate body; 11. Inner hole; 12. Countersunk platform; 2. Wear-resistant sleeve; 21. Mounting hole. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 , 2 As shown, this utility model embodiment provides a push plate for an intelligent rotary guide system, including a push plate body 1. The two ends of the two inner holes 11 of the push plate body 1 are respectively provided with wear-resistant sleeves 2 that are detachably connected. There are four wear-resistant sleeves 2, and the middle of the wear-resistant sleeve 2 is provided with a mounting hole 21 for the pin shaft to pass through.

[0021] In this embodiment, the intelligent rotary guide system uses a wear-resistant sleeve 2 instead of the supersonic flame spraying wear-resistant layer process. The pre-made wear-resistant sleeve 2 of appropriate size is connected to the push plate body 1 by heat fitting. Specifically, the wear-resistant sleeve 2, which has high hardness and high wear resistance, replaces the supersonic flame spraying wear-resistant layer. Without affecting the assembly of the parts, this significantly reduces the difficulty of parts processing, significantly improves the wear resistance of the opening and closing parts, thereby extending the overall service life of the product. Even if the wear-resistant sleeve fails later, the repair plan is simpler and the processing cost is lower.

[0022] In this embodiment, the two inner holes 11 of the push plate body 1 are respectively provided with recessed platforms 12 at both ends, and the wear-resistant sleeve 2 is disposed in the recessed platforms 12. When the wear-resistant sleeve 2 is in the recessed platform 12, the outer surface of the wear-resistant sleeve 2 is flush with the side of the push plate body 1 or protrudes from the side of the push plate body 1 by 0.2 to 0.3 mm (if it is set in a protruding manner, the push plate body 1 will be reduced by 0.2 to 0.3 mm accordingly to ensure that the fitting dimensions between the push plate and the push plate base remain unchanged after the wear-resistant sleeve 2 is assembled). This design has the following advantages: 1. It can ensure that the original external dimensions of the push plate are maintained after the wear-resistant sleeve 2 is installed in the push plate body 1; 2. It utilizes the T-shaped structure characteristics of the wear-resistant sleeve 2 to make it 3. If the wear-resistant sleeve 2 and the push plate body 1 are set with the side protrusion, and the set wear amount is 0.2~0.3mm, then the wear-resistant sleeve 2 will be replaced when the protruding part is worn down, and the push plate body 1 will not be affected. If the wear-resistant sleeve 2 and the push plate body 1 are set with the side flush, then the side of the push plate body 1 will also wear down by 0.2~0.3mm along with the wear-resistant sleeve 2. Of course, this amount of wear will not affect the performance after the wear-resistant sleeve 2 is replaced.

[0023] In this embodiment, the outer circle of the wear-resistant sleeve 2 is connected to the inner hole 11 of the push plate body 1 by an interference fit. The interference fit between the outer circle of the wear-resistant sleeve 2 and the inner hole of the push plate body 1 is 0.01~0.03mm (which can be adjusted as needed). During manufacturing, the push plate body 1 and the wear-resistant sleeve 2 are first machined to the design requirements. During assembly, the inner hole 11 of the push plate body 1 is heated to about 200℃ (180~240℃) by flame heating or induction heating (the heating temperature will vary depending on the material and interference fit of the push plate body 1, and needs to be calculated according to the actual situation), causing the inner hole 11 to expand. Then, the wear-resistant sleeve 2 is inserted into the inner hole 11 of the push plate body 1. In this way, the large end face of the outer side of the wear-resistant sleeve 2 replaces the existing design scheme of sprayed wear-resistant layer. Its wear resistance and erosion resistance are better than those of the sprayed wear-resistant layer. At the same time, the low-temperature heating of about 200℃ during assembly will not affect the precision and material properties of the parts. When the wear-resistant sleeve 2 wears out during normal use, the repair process only requires heating the inner hole 11 of the push plate body 1 to remove the worn wear-resistant sleeve 2 and then re-inserting a new wear-resistant sleeve 2. The repair process is simple, reliable, easy to operate, and has a lower cost.

[0024] In this embodiment, the wear-resistant sleeve 2 is manufactured using a separate powder metallurgy forming process. The wear-resistant sleeve 2 is connected to the push plate body 1 using a hot-fitting technique. The manufacturing process of the wear-resistant sleeve 2 is relatively simple, with better process stability and lower cost. In other embodiments, the wear-resistant sleeve 2 and the push plate body 1 can also be connected by adhesive (the outer circle and inner hole of the wear-resistant sleeve 2 and the push plate body 1 can be designed with a clearance fit (e.g., a clearance of 0.02 to 0.04 mm), adhesive is applied to the surfaces of the outer circle and inner hole before assembly, and the parts are fixed by adhesive), cold pressing (when the interference of the outer circle and inner hole of the wear-resistant sleeve 2 and the push plate body 1 is small (e.g., interference ≤ 0.01), a hydraulic press can be used to directly press the wear-resistant sleeve 2 into the push plate body 1), etc.

[0025] In this embodiment, the wear-resistant sleeve 2 has a T-shaped structure. The wear-resistant sleeve 2 includes one of the following: alloy sleeve, steel sleeve, ceramic sleeve, cubic boron nitride sleeve, and diamond sleeve with a T-shaped structure. The wear-resistant sleeve 2 has better wear resistance and erosion resistance, and can obtain a longer service life.

[0026] In this embodiment, the thickness of the T-shaped horizontal portion of the wear-resistant sleeve 2 is 2-4 mm. This size design is based on the specifications of commonly used push plates, and takes into account the manufacturing process and the cost of alloy parts as a preferred size range reference. It can be appropriately adjusted according to the size of the push plate. The wall thickness of the T-shaped vertical portion of the wear-resistant sleeve 2 is 2-4 mm. The wall thickness of the wear-resistant sleeve 2 far exceeds the wear-resistant layer thickness of conventional supersonic flame spraying (the spraying layer thickness is generally 0.15-0.3 mm). This is also the main reason why the push plate in this embodiment is more wear-resistant and erosion-resistant.

[0027] In this embodiment, the height of the wear-resistant sleeve 2 is equal to half the width L of the opening and closing part of the push plate body 1. This design has the following advantages: 1. It can ensure that the original shape and size characteristics of the push plate are maintained after the wear-resistant sleeve 2 is installed in the push plate body 1; 2. It makes the size and structure of the wear-resistant sleeve 2 uniform and has strong interchangeability during mass production.

[0028] In this embodiment, the wear-resistant sleeve 2 is an integral structure. This design utilizes the T-shaped structure of the wear-resistant sleeve 2 to ensure that the inner hole and the inner and outer sides are wear-resistant at the same time. The integral structure is simple to manufacture and has high reliability in use.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A push plate for an intelligent rotary guide system, comprising a push plate body, characterized in that, The two inner holes of the push plate body are respectively provided with wear-resistant sleeves that are detachably connected at both ends. The wear-resistant sleeves are provided with mounting holes for the pin shaft to pass through in the middle. The two inner holes of the push plate body are respectively provided with recessed platforms, and the wear-resistant sleeves are set in the recessed platforms.

2. The push plate for the intelligent rotary guide system according to claim 1, characterized in that, When the wear-resistant sleeve is inside the recessed platform, the outer surface of the wear-resistant sleeve is flush with the side of the push plate body or protrudes 0.2 to 0.3 mm from the side of the push plate body.

3. The push plate for the intelligent rotary guide system according to claim 1, characterized in that, The outer circle of the wear-resistant sleeve is connected to the inner hole of the push plate body by an interference fit.

4. The push plate for the intelligent rotary guide system according to claim 3, characterized in that, The interference fit between the outer circle of the wear-resistant sleeve and the inner hole of the push plate body is 0.01 to 0.03 mm.

5. The push plate for the intelligent rotary guide system according to claim 1, characterized in that, The wear-resistant sleeve has a T-shaped structure.

6. The push plate for the intelligent rotary guide system according to claim 5, characterized in that, The thickness of the T-shaped horizontal portion of the wear-resistant sleeve is 2-4 mm.

7. The push plate for the intelligent rotary guide system according to claim 5, characterized in that, The wall thickness of the T-shaped vertical portion of the wear-resistant sleeve is 2-4 mm.

8. The push plate for the intelligent rotary guide system according to any one of claims 1-7, characterized in that, The height of the wear-resistant sleeve is equal to half the width L of the opening and closing part of the push plate body.

9. The push plate for the intelligent rotary guide system according to any one of claims 1-7, characterized in that, The wear-resistant sleeve has an integral structure.

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