A downhole well logging instrument housing protection device

Abstract

The utility model discloses a kind of downhole logging instrument shell protection devices, it is related to downhole equipment technical field, the downhole logging instrument shell protection device of above-mentioned includes main body and several wear-resistant parts, main body cross section is circular ring structure, several flow guide grooves extending along the axis direction of main body are equipped on main body, several flow guide grooves are distributed along the axis circumference of main body, several wear-resistant parts are all installed in the outer circumferential surface of main body, several wear-resistant parts are distributed in the outer circumferential surface of main body, wear-resistant part can make main body avoid excessive wear, it is favorable to promote the use time length of main body, to guarantee the normal use of downhole logging instrument shell further, play protection downhole instrument, increase the service life of logging downhole instrument, and the volume of several wear-resistant parts is much smaller than main body, can ensure that overall wear resistance reduces manufacturing cost simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of downhole equipment technology, and more specifically, to a protective device for the housing of a downhole logging instrument. Background Technology

[0002] Horizontal well drilling is an important means of efficiently extracting oil and natural gas. The horizontal section of horizontal well drilling is often between 1,000 and 2,000 meters. Horizontal well logging basically adopts a full-scale instrument combination. Therefore, when logging horizontal wells, it is basically the entire weight of the logging instrument is pressed on the well wall. The logging instrument moves in the wellbore. However, due to the rough well wall and the unusually hard formation rocks in the wellbore, the downhole logging instruments wear out quickly and are damaged.

[0003] Currently, protective rings are generally used to protect logging downhole instruments and reduce wear on the wellbore and the instruments. However, in horizontal well logging, the material of the protective ring is not wear-resistant, so it wears out quickly, leading to the rapid scrapping of the logging downhole instruments. If a fully wear-resistant material is used for the protective ring, it will not only be expensive, but also, because wear-resistant materials usually have low toughness, the protective ring will break when it encounters hard rocks in the well, thus losing its protective function.

[0004] In summary, how to provide a protective device that is both low in manufacturing cost and wear-resistant is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a protective device for the housing of downhole logging instruments, which has low manufacturing cost and good wear resistance, effectively protects the housing of downhole logging instruments, and reduces replacement and maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A protective device for the housing of a downhole logging instrument includes:

[0008] The main body has a circular cross-section and is provided with a plurality of guide grooves extending along the axis of the main body, and the plurality of guide grooves are distributed circumferentially along the axis of the main body;

[0009] A plurality of wear-resistant parts are mounted on the outer peripheral surface of the main body, and the plurality of wear-resistant parts are distributed on the outer peripheral surface of the main body.

[0010] Furthermore, in this utility model, the main body is made of stainless steel, and the wear-resistant part is made of tungsten steel.

[0011] Furthermore, the main body is provided with a plurality of mounting holes, the same number as the number of wear-resistant parts, and the plurality of wear-resistant parts are respectively installed in the corresponding mounting holes.

[0012] Furthermore, the wear-resistant component protrudes 0.1-0.5 mm from the outer circumferential surface of the main body.

[0013] Furthermore, the present invention provides a fixing structure for fixing the wear-resistant part inside the mounting hole.

[0014] Furthermore, this utility model also includes:

[0015] A plurality of fasteners are installed on the main body and distributed circumferentially along the axis of the main body. The fasteners are used to fix the main body to the housing of the downhole logging instrument.

[0016] Furthermore, the main body is provided with a plurality of threaded holes perpendicular to the axis of the main body, and the fixing member is cylindrical. The plurality of fixing members are fixed to the main body by threaded engagement with the corresponding threaded holes on the main body.

[0017] Furthermore, in this utility model, the plurality of fixing members include:

[0018] The convex head set screw has a thread on its outer circumferential surface that mates with the threaded hole. The convex head set screw has a fixing part on the side facing the main axis. The downhole logging instrument housing has a fixing hole for inserting the fixing part.

[0019] Furthermore, the plurality of fixing members of this utility model also include:

[0020] The flat-head set screw has a thread on its outer circumferential surface that mates with the threaded hole, and an anti-slip surface is provided on the side of the flat-head set screw facing the main body axis.

[0021] Furthermore, the main body has chamfers on both ends of its axial direction.

[0022] The downhole logging instrument housing protection device provided by this utility model has several wear-resistant parts installed on the outer circumference of the main body. This ensures good wear resistance in all directions, thus protecting the downhole logging instrument housing. The main body has several guide channels extending along its axial direction, distributed circumferentially along the main axis. These channels allow downhole solutions to drain smoothly, preventing obstruction of the downhole logging instrument's movement. In other words, by embedding wear-resistant parts into the main body, excessive wear is prevented when the main body is worn, extending its service life and ensuring the normal use of the downhole logging instrument housing. This protects the downhole instrument and increases its service life. Furthermore, the wear-resistant parts are much smaller than the main body, ensuring overall wear resistance while reducing manufacturing costs. Attached Figure Description

[0023] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall axial side structure provided by this utility model;

[0025] Figure 2 A schematic diagram of the overall installed structure provided by this utility model;

[0026] Figure 3 This is a structural schematic diagram of the overall side view of the present invention;

[0027] Figure 4 This is a schematic diagram of the overall front structure of this utility model.

[0028] Figures 1-4 In the accompanying drawings, the reference numerals include:

[0029] 1. Main body; 2. Guide channel; 3. Fixing component; 301. Convex head top screw; 302. Flat head top screw; 4. Wear-resistant component; 5. Downhole logging instrument housing. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The core of this utility model is to provide a protective device for the housing of downhole logging instruments, which has low manufacturing cost and good wear resistance, effectively protecting the housing of downhole logging instruments and reducing replacement and maintenance costs.

[0032] Please refer to Figure 2 A protective device for the outer shell of a downhole logging instrument includes a main body 1 and several wear-resistant parts 4. The main body 1 has a circular cross-section and several guide grooves 2 extending along the axis of the main body 1. The guide grooves 2 are evenly distributed around the circumference of the axis of the main body 1. The wear-resistant parts 4 are installed on the outer circumferential surface of the main body 1 and are distributed on the outer circumferential surface of the main body 1.

[0033] It should be noted that the main body 1 in this embodiment of the present invention may also adopt other shapes, such as a rectangular or polygonal cross-section.

[0034] In addition, in this embodiment of the present invention, the guide groove 2 is located on the outer peripheral surface of the main body 1 and penetrates the outer peripheral surface of the main body 1 along the axial direction of the main body 1.

[0035] Optionally, in some embodiments, the wear-resistant part 4 can be of any shape, and the wear-resistant part 4 can be attached to the main body 1 by means of inlay or welding.

[0036] Optionally, in some embodiments, the main body 1 can be fixed to the housing 5 of the downhole logging instrument by means of bolts or clips.

[0037] Optionally, in some embodiments, the number of wear-resistant parts 4 can be selected according to actual usage requirements, specifically, according to the hardness of the terrain, the depth of the well, etc.

[0038] Optionally, in some embodiments, the wear-resistant component 4 may have a ring-shaped structure and be fixed coaxially with the main body 1.

[0039] In use, several wear-resistant parts 4 are installed on the outer circumference of the main body 1. This ensures that the main body 1 has good wear resistance in all directions, thereby ensuring the protection of the downhole logging instrument housing 5 by the main body 1. The main body 1 is provided with several guide grooves 2 extending along the axis of the main body 1. The guide grooves 2 are evenly distributed around the circumference of the axis of the main body 1. The guide grooves 2 can smoothly discharge the downhole solution, thereby avoiding obstruction to the movement of the downhole logging instrument. In other words, by installing wear-resistant parts 4 on the main body 1, when the main body 1 is worn, the wear-resistant parts 4 can prevent the main body 1 from being worn excessively, which helps to extend the service life of the main body 1, thereby ensuring the normal use of the downhole logging instrument housing 5, protecting the downhole instrument, and increasing the service life of the downhole logging instrument. Moreover, the volume of the several wear-resistant parts 4 is much smaller than that of the main body 1, which can ensure overall wear resistance while reducing manufacturing costs.

[0040] Optionally, in some embodiments, the main body 1 is made of stainless steel and the wear-resistant part 4 is made of tungsten carbide. Tungsten carbide (also known as cemented carbide) is a composite material with tungsten carbide (WC) as the main component and metals such as cobalt (Co) or nickel (Ni) as the binder phase. Its hardness at room temperature can reach HRA 88~94 (second only to diamond), and it has excellent wear resistance. Stainless steel is low in cost. Therefore, the wear-resistant part 4 is made of tungsten carbide and the main body 1 is made of stainless steel, which can ensure its wear resistance while keeping the manufacturing cost low.

[0041] In other embodiments, the wear-resistant part 4 may also be made of other wear-resistant materials, such as diamond, ceramic materials, etc.

[0042] Optionally, in some embodiments, the main body 1 is provided with a plurality of mounting holes equal in number to the wear-resistant parts 4, and the plurality of wear-resistant parts 4 are respectively installed in the corresponding mounting holes. That is, the wear-resistant parts 4 are fixed through the mounting holes to ensure that the wear-resistant parts 4 are fixed to the main body 1.

[0043] Optionally, in some embodiments, the mounting holes can be determined according to the size and shape of the wear-resistant part 4, thereby achieving its effective fixation.

[0044] Optionally, in some embodiments, a fixing structure for fixing the wear-resistant part 4 is provided in the mounting hole, which can ensure that the wear-resistant part 4 is firmly fixed in the mounting hole.

[0045] Optionally, in some embodiments, when installing the wear-resistant part 4, a fixing adhesive is applied to the mounting hole, and the wear-resistant part 4 is securely installed in the mounting hole when the adhesive dries.

[0046] Optionally, in some embodiments, the adhesive can be AB adhesive, which is formed by mixing A glue (resin) and B glue (curing agent) and then undergoing a chemical reaction to cure. It has the characteristics of high bonding strength, high temperature resistance, and corrosion resistance, and is suitable for the firm bonding of materials such as metal, ceramic, wood, and plastic. After curing, it has high hardness and low shrinkage rate. Therefore, AB adhesive can further improve the fixing effect of wear-resistant parts 4.

[0047] In other embodiments, the main body 1 is provided with a fixing hole, which is coaxially arranged with the mounting hole and the diameter of the fixing hole is larger than that of the mounting hole. A fixing ring is provided in the fixing hole, and the fixing ring is fixed to the main body 1 by bolts. The end of the wear-resistant part 4 that extends out of the main body 1 is provided with a chamfer, and the inner diameter of the fixing ring is smaller than the maximum diameter of the wear-resistant part 4. Therefore, when the wear-resistant part 4 is placed in the fixing hole, the fixing ring covers the wear-resistant part 4. The fixing ring is installed on the main body 1 by bolts. The fixing ring limits the wear-resistant part 4, and the wear-resistant part 4 can be effectively fixed.

[0048] In other embodiments, the main body 1 is provided with a fixing hole extending along its axial direction. The fixing holes are connected to each other. The wear-resistant part 4 is provided with a fixing hole at one end located in the fixing hole. A fixing strip is inserted into the fixing hole. When the fixing strip is inserted into the fixing hole, it is also inserted into the fixing hole on the wear-resistant part 4, thereby fixing the wear-resistant part 4 to the main body 1.

[0049] In the above embodiment, the fixing hole is located on the side of the wear-resistant part 4. Specifically, the fixing hole is perpendicular to the axis of the wear-resistant part 4 and is located on one side of the axis of the wear-resistant part 4. The depth of the fixing hole is less than 5mm.

[0050] Please refer to Figure 3 In some embodiments, the wear-resistant part 4 protrudes 0.1-0.5mm from the outer peripheral surface of the main body 1. That is, the wear-resistant part 4 is higher than the outer peripheral surface of the main body 1. The higher part can effectively prevent the main body 1 from directly contacting the well wall, which is conducive to increasing the service life of the main body 1.

[0051] In the above embodiment, the height of the wear-resistant part 4 above the main body 1 is less than 0.5mm, which can effectively prevent the wear-resistant part 4 from being damaged due to excessive exposure and can improve the service life of the wear-resistant part 4.

[0052] Please refer to Figure 1 In some embodiments, a number of fasteners 3 are also included. The fasteners 3 are installed on the main body 1 and distributed circumferentially along the axis of the main body 1. The fasteners 3 are used to fix the main body 1 to the downhole logging instrument housing 5. That is to say, the main body 1 and the downhole logging instrument housing 5 can be fixedly connected by a number of fasteners 3, so as to ensure that the main body 1 protects the downhole logging instrument housing 5.

[0053] Optionally, in some embodiments, the main body 1 is provided with a plurality of threaded holes perpendicular to the axis of the main body 1, the fixing member 3 is cylindrical, and the plurality of fixing members 3 are threadedly engaged with the corresponding threaded holes and fixed to the main body 1, and the fixing member 3 can be easily operated through the through hole.

[0054] In the above embodiments, the fixing member 3 can be a bolt that is rotatably installed on the main body 1. Specifically, the bolt is threaded on the inner wall of the main body 1. When fixing is required, the bolt can be tightened between the bolt and the housing 5 of the downhole logging instrument by rotating the bolt, thereby achieving the purpose of fixing the main body 1.

[0055] In other embodiments, the fastener 3 can be implemented using a structure with specific elastic deformation function. Specifically, the downhole logging instrument housing 5 is provided with corresponding fixing holes, and the fastener 3 is installed on the inner wall of the main body 1. When the main body 1 is fitted onto the downhole logging instrument housing 5, the fastener 3 can be inserted into the corresponding fixing hole to achieve a fixed connection between the main body 1 and the downhole logging instrument housing 5.

[0056] In other embodiments, several fasteners 3 include a convex head screw 301. The outer peripheral surface of the convex head screw 301 is provided with a thread that mates with a threaded hole. The convex head screw 301 has a fixing part on the side facing the axis of the main body 1. The downhole logging instrument housing 5 is provided with a fixing hole for the fixing part to be inserted into. That is, the convex head screw 301 includes a protrusion and a threaded part. The protrusion is used to be inserted into the fixing hole on the downhole logging instrument housing 5, thereby ensuring that the axial position of the main body 1 and the downhole logging instrument housing 5 is fixed.

[0057] Optionally, in some embodiments, several fasteners 3 further include flat-headed set screws 302. The outer peripheral surface of the flat-headed set screw 302 is provided with threads that mate with threaded holes. The flat-headed set screw 302 is provided with an anti-slip surface on the side facing the axis of the main body 1. That is to say, the flat-headed set screw 302 directly contacts the surface of the downhole logging instrument housing 5, thereby achieving radial fixation of the main body 1 and the downhole logging instrument housing 5. Through the cooperation of the flat-headed set screw 302 and the convex-headed set screw 301, the main body 1 is effectively fixedly connected to the downhole logging instrument, ensuring the effective protection of the downhole logging instrument by the main body 1.

[0058] In the above embodiment, the end of the convex top screw 301 is conical, and the conical structure makes it easy to align with the fixing hole on the housing 5 of the downhole logging instrument.

[0059] In the above embodiments, the anti-slip surface of the flat-head top screw 302 is provided with anti-slip texture or an anti-slip layer to increase the contact friction with the housing 5 of the downhole logging instrument.

[0060] Please refer to Figure 1In some embodiments, both ends of the main body 1 along the axial direction are chamfered. Specifically, the chamfers at both ends of the main body 1 make the main body 1 move more smoothly in the well, avoiding the situation of getting stuck when encountering rock protrusions.

[0061] In the above embodiments, the main body 1 can also adopt a split structure. Specifically, the main body 1 structure includes two identical semi-circular ring structures. The two semi-circular ring structures of the main body 1 can be connected by bolts, clips or legal connections. The split structure is conducive to rapid installation and maintenance, and is suitable for logging scenarios that require frequent replacement or maintenance. The modular design allows for partial replacement of damaged parts, reducing costs.

[0062] In other words, the key point of this utility model embodiment is: the main body 1 protects the housing 5 of the downhole logging instrument. The main body 1 is provided with several guide grooves 2 extending along the axis of the main body 1. The guide grooves 2 are distributed circumferentially along the axis of the main body 1. The guide grooves 2 can smoothly discharge the downhole solution, thereby avoiding obstruction to the movement of the downhole logging instrument. That is to say, wear-resistant parts 4 with good wear resistance are installed on the main body 1. When the main body 1 is worn, the wear-resistant parts 4 can prevent the main body 1 from excessive wear, which is conducive to increasing the service life of the main body 1, thereby ensuring the normal use of the housing 5 of the downhole logging instrument, protecting the downhole instrument, increasing the service life of the logging downhole instrument, and the volume of the several wear-resistant parts 4 is much smaller than that of the main body 1, which can ensure the overall wear resistance while reducing manufacturing costs.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The above provides a detailed description of the protective device for the casing of a downhole logging instrument provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A protective device for the housing of a downhole logging instrument, comprising a housing (5) installed on the housing of a downhole logging instrument, characterized in that, include: The main body (1) has a circular cross-section and is provided with a plurality of guide grooves (2) extending along the axis of the main body (1). The plurality of guide grooves (2) are distributed circumferentially along the axis of the main body (1). Several wear-resistant parts (4) are installed on the outer peripheral surface of the main body (1) and distributed on the outer peripheral surface of the main body (1).

2. The downhole logging instrument housing protection device according to claim 1, characterized in that, The main body (1) is made of stainless steel, and the wear-resistant part (4) is made of tungsten steel.

3. The downhole logging instrument housing protection device according to claim 2, characterized in that, The main body (1) has a number of mounting holes equal to the number of wear-resistant parts (4), and the wear-resistant parts (4) are respectively installed in the corresponding mounting holes.

4. The downhole logging instrument housing protection device according to claim 2, characterized in that, The wear-resistant part (4) protrudes 0.1-0.5 mm from the outer periphery of the main body (1).

5. A protective device for the housing of a downhole logging instrument according to claim 3, characterized in that, The mounting hole is provided with a fixing structure for fixing the wear-resistant part (4).

6. A protective device for the housing of a downhole logging instrument according to any one of claims 1-5, characterized in that, Also includes: Several fasteners (3) are installed on the main body (1) and distributed circumferentially along the axis of the main body (1). The fasteners (3) are used to fix the main body (1) to the housing (5) of the downhole logging instrument.

7. The downhole logging instrument housing protection device according to claim 6, characterized in that, The main body (1) is provided with a plurality of threaded holes perpendicular to the axis of the main body (1), and the fixing member (3) is cylindrical. The plurality of fixing members (3) are fixed to the main body (1) by threaded engagement with the corresponding threaded holes on the main body (1).

8. The downhole logging instrument housing protection device according to claim 7, characterized in that, The plurality of fasteners (3) include: The convex head screw (301) has a thread on its outer circumference that mates with the threaded hole. The convex head screw (301) has a fixing part on the side facing the axis of the main body (1). The downhole logging instrument housing (5) has a fixing hole for the fixing part to be inserted.

9. A protective device for the housing of a downhole logging instrument according to claim 8, characterized in that, The plurality of fasteners (3) also include: Flat-head set screw (302), the outer peripheral surface of the flat-head set screw (302) is provided with a thread that mates with the threaded hole, and the flat-head set screw (302) is provided with an anti-slip surface on the side facing the axis of the main body (1).

10. A protective device for the housing of a downhole logging instrument according to any one of claims 1-5, characterized in that, The main body (1) has chamfers on both ends of its axial direction.

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