A connection for a downhole tool bridge

Abstract

This invention relates to the field of auxiliary equipment for oilfield downhole tools, and more particularly to a bridge support for connecting downhole tools. This bridge support includes a bracket with rollers at its top, a bushing outside the bracket, and a lifting device at the bottom of the bushing. The lifting device, connected to a power source, controls the height of the bushing. A support structure is provided outside the bushing, fixing the direction and position of the bushing and the bracket. The height of the bracket inside the bushing is adjustable. The bridge support proposed in this invention, by fixing the direction of the bracket through the support mechanism, and with rollers at the top of the bracket contacting the downhole tool, supports the downhole tool during connection, reducing the workload and intensity of the workers, improving stability during connection work, and enhancing the connection effect. Simultaneously, it prevents the downhole tool from falling and injuring workers during connection work, improving the safety of downhole tool connection operations.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for oilfield downhole tools, and in particular to a bridge seat for connecting downhole tools. Background Technology

[0002] During downhole operations, various downhole tools need to be connected and lowered into their designated positions in the well according to the actual construction plan and requirements to achieve their respective construction objectives. The connection quality and efficiency between the tools significantly impact the overall efficiency of the downhole operation. In existing technologies, downhole tools are typically connected by several workers. However, since these tools generally weigh between 20-50 kg, workers expend considerable physical energy during connection and movement, making it difficult to guarantee the connection effectiveness. Poor connection results in a lack of smoothness in the downhole operation, requiring reconnection, and in severe cases, even rendering the well unusable, causing significant economic losses. Furthermore, the physical exertion during connection increases the risk of tools falling and injuring workers. Therefore, to address these shortcomings, a bridge-type connection for downhole tools is proposed. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a bridge base for connecting downhole tools, which solves the problems of long installation time, unstable connection effect, and easy fall of downhole tools that could injure workers during the installation process.

[0004] (II) Technical Solution To solve the above problems, the present invention provides a bridge for connecting downhole tools, comprising: A vertical support frame has several rollers at its top, with the rollers aligned parallel to each other. The tops of the rollers contact and support the downhole tool. A bushing is provided outside the support frame, with a lifting device at its bottom. This lifting device, connected to a power source, controls the height of the bushing. A support structure is provided outside the bushing to fix the direction and position of both the bushing and the support frame. The height of the support frame within the bushing is adjustable.

[0005] Preferably, the outer surface of the roller is provided with a buffer layer to reduce friction between the roller and the downhole tool.

[0006] Preferably, the support mechanism includes an outer tube and support rods. The outer tube is sleeved outside the bushing tube, and multiple support rods are evenly arranged on the outer wall of the outer tube in the circumferential direction to fix the direction of the outer tube. The minimum number of support rods is three.

[0007] Preferably, the support mechanism has a horizontally arranged base at its bottom, the bottom end of the support rod is fixed on the base, and the top end is connected to the outer wall of the exterior.

[0008] Preferably, the bracket has multiple radially penetrating fixing grooves arranged sequentially from top to bottom, and a pin is provided in the fixing groove. The length of the pin is greater than the diameter of the bushing tube. The height of the bracket can be adjusted by adjusting the connection position between the pin and the fixing groove.

[0009] Preferably, the number of rollers at the top of the bracket is two.

[0010] Preferably, the roller surface is provided with a conveyor chain, and the roller surface meshes with the conveyor chain. After the roller contacts the downhole tool, rotating the roller drives the downhole tool to move.

[0011] (III) Beneficial Effects The connecting bridge for downhole tools provided by this invention, after fixing the direction of the support frame through the support mechanism, has a roller at the top of the support frame that contacts and supports the downhole tool. This supports the downhole tool during connection, reducing the workload and intensity of the workers, improving the stability of the downhole tool during connection work, and thus enhancing the connection effect. Simultaneously, the combination of the support frame and rollers in supporting the downhole tool prevents it from falling and injuring workers during connection work, improving the safety of the connection process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the bridge base for connecting the downhole tool according to the present invention.

[0013] The components include: 1. base; 2. support rod; 3. outer tube; 4. lifting device; 5. bushing tube; 6. bracket; 7. roller; and 8. pin. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this invention and to simplify the description. It is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0016] like Figure 1 As shown, this invention provides a bridge for connecting downhole tools, specifically comprising: a vertically oriented support 6, with a plurality of rollers 7 at the top of the support 6, the rollers 7 being parallel in direction, and the tops of the rollers 7 contacting and supporting the downhole tool. The support 6, as the main body of the device, can support the downhole tool by its own strength after being vertically installed at the work site. A rotating shaft is typically located at the center of each roller 7, passing through the roller 7 and connecting to the top of the support 6 at both ends. The roller 7 can then rotate around the rotating shaft. During the connection of the downhole tool, the position of the support 6 is fixed, and then the downhole tool is placed on the roller 7. The weight of the downhole tool is borne by the support 6 and the rollers 7, allowing the operator to focus primarily on the connection work, eliminating the need for multiple operators to coordinate the fixing and moving of the downhole tool, thus improving the connection effect. Simultaneously, when the downhole tool moves along the rotation direction of the rollers 7, the rollers 7 rotate synchronously, thereby reducing the friction on the downhole tool and preventing wear during transport and movement. With the support of bracket 6 and rollers 7, the number of workers required for connecting downhole tools can be reduced from 2-3 people to one person, thus reducing manpower consumption. The rotatable rollers 7, in conjunction with bracket 6, greatly reduce the difficulty of moving downhole tools, improve the efficiency of the connection process, and save connection time.

[0017] To ensure the strength of the device, the roller 7 is generally made of a metal material with high strength and hardness. However, during prolonged contact and friction between the metal roller 7 and the downhole tool, impacts or wear are inevitable. Therefore, a buffer layer is usually provided on the outer surface of the roller 7 to reduce friction between the roller 7 and the downhole tool. The buffer layer is made of a material with good elasticity and ductility. The weight of the downhole tool acts on the buffer layer before being transferred to the roller 7. The buffer layer undergoes elastic deformation according to the pressure and recovers its shape after the pressure is removed, thus preventing the roller 7 from directly contacting the downhole tool. Typically, rubber is used as the main material for the buffer layer. However, in actual operation, the buffer layer can be replaced with other materials that better meet the operational requirements, such as materials with better heat resistance or cold resistance, depending on the model and quality of the downhole tool to be connected.

[0018] The rollers 7 are parallel to each other, which enables them to support the downhole tool together and cooperate in transporting the downhole tool during operation, thereby improving the working efficiency and stability of the device.

[0019] It should be noted that the number of rollers 7 at the top of the bracket 6 is preferably two, and the two rollers 7 are parallel in direction. Figure 1As shown, the rollers 7 are arranged in a straight line at the top of the support 6. When moving the downhole tool, the two rollers 7 work together to distribute the weight of the tool, thereby extending the service life of the device. Simultaneously, the combined action of the two rollers 7 can fix the direction of movement of the downhole tool on the surface of the rollers 7, preventing the tool from shifting or slipping when moving along the rollers 7. In actual operation, the number of rollers 7 can be adjusted according to work needs. However, when increasing the number of rollers 7, it should be considered whether the size of the support 6 is sufficient to support multiple rollers 7, to prevent the rollers 7 from falling off during operation and causing the downhole tool to fall and injure personnel.

[0020] Furthermore, when connecting heavy or specially shaped downhole tools, simply pushing the tool may not be enough to move it on the roller 7. In this case, a transmission chain can be installed on the surface of the roller 7, engaging with it. After the roller 7 contacts the downhole tool, rotating it moves the tool. When the downhole tool needs to be moved, the operator rotates the roller 7 according to the direction of movement. This causes the transmission chain to rotate synchronously. When the transmission chain contacts the downhole tool, it hooks onto protruding parts such as edges or keyways on the tool's surface, thus moving the tool. For easier operation, one end of the roller 7 can be connected to the motor's output, utilizing the motor's output to move the roller 7, thereby improving the tool's movement capability and increasing the device's efficiency.

[0021] The bracket 6 is equipped with a bushing 5, and a lifting device 4 is located at the bottom of the bushing 5. The lifting device 4, connected to a power source, controls the height of the bushing 5, allowing the bracket 6 to be adjusted in height within the bushing 5. The bushing 5 protects the bracket 6 and helps it maintain its upright position. By increasing the height of the bracket 6 within the bushing 5, the height of the roller 7 can be adjusted, thus allowing the working height of the roller 7 to meet the needs of different working conditions. The lifting device 4 is a common height adjustment device; its output end is connected to the bottom of the bracket 6. When the lifting device 4 is activated, its output end moves up and down, causing the bracket 6 to move up and down within the bushing 5. The lifting device 4, bracket 6, and bushing 5 work together to finely adjust the working height of the roller 7, thereby increasing the adjustment range of the roller 7's working height and improving the practicality of the device.

[0022] The bracket 6 has multiple radially penetrating fixing grooves arranged sequentially from top to bottom, and a pin 8 is installed in each fixing groove. The length of the pin 8 is greater than the diameter of the bushing tube 5. By adjusting the connection position between the pin 8 and the fixing groove, the height of the bracket 6 can be adjusted. When the height of the bracket 6 needs to be adjusted within the bushing tube 5, the pin 8 is removed, the bracket 6 is moved and adjusted to a suitable height, and then the pin 8 is inserted into the fixing groove corresponding to the current height of the bracket 6. After both ends of the pin 8 pass through the fixing groove, they contact the top of the bushing tube 5, thereby preventing the bracket 6 from moving downward and fixing the height of the bracket 6, thus realizing the adjustment of the height of the bracket 6.

[0023] It should be noted that the lifting device 4, as a common height adjustment device, can be replaced with different types of adjustment devices depending on the usage conditions. For example, a hydraulic device such as a jack can be used as the lifting device 4. After connecting the top end of the output end to the bottom end of the bracket 6, the height of the bracket 6 can be adjusted through the lifting device. Similarly, in addition to hydraulic drive, the lifting device 4 can also be replaced with a mechanically driven or electrically driven height adjustment device to improve the practicality of the device.

[0024] In this invention, a support structure is provided outside the bushing 5, which fixes the direction and position of the bushing 5 and the bracket 6. The support mechanism mainly serves to straighten and support the bushing 5 and fix the direction of the bracket 6 through the bushing 5. The support mechanism includes an outer tube 3 and support rods 2. The outer tube 3 is sleeved on the outside of the bushing 5, and multiple support rods 2 are evenly arranged circumferentially on the outer wall of the outer tube 3 to fix the direction of the outer tube 3. One end of the support rod 2 rests on the ground, and the other end is connected to the outer wall of the outer tube 3. The multiple support rods 2 work together to fix the direction of the outer tube 3.

[0025] To ensure the stability of the device, the number of support rods 2 must be at least three. If the number of support rods 2 is less than three, it cannot effectively support the outer pipe 3. When the outer pipe 3 is subjected to force and shakes, it is easy to tilt to one side, causing the downhole tools to fall and be damaged, posing a safety hazard of injuring workers.

[0026] It is important to note that the connection work for the downhole tools is usually carried out around the working well, where the ground conditions are uncertain. In areas with uneven ground, it is difficult to provide a stable stress point for the support rod 2. Therefore, a horizontally arranged base 1 is provided at the bottom of the support mechanism. The bottom end of the support rod 2 is fixed to the base 1, and the top end is connected to the outer wall of the outer casing 3. The base 1 has a large stress-bearing area, which can provide a flat and stable support point for the support rod 2 in most working environments, thereby improving the stability of the device. To simplify the size of the device, the base 1 can be processed into several long strip-shaped support bars, which are evenly distributed along the perimeter in a petal shape. One end of each support bar is connected together, and the other end is connected to the bottom end of the support rod 2. The number and position of the support bars correspond to the support rod 2. Typically, the bottom of the lifting device 4 is mounted on the base 1, thereby improving the stability of the device.

[0027] In actual operation, multiple tool bridge seats provided by this invention can be arranged along the moving direction of the downhole tool, so that the downhole tool is always supported by the tool bridge seats during the connection process.

[0028] The connecting bridge for downhole tools provided by this invention can support the downhole tools during the connection process, reducing the workload of workers and improving the efficiency and effectiveness of the connection work. The specific operation process of this device is as follows: Step 1: According to the work requirements, arrange multiple downhole tool bridge seats in a straight line along the direction of movement of the downhole tools.

[0029] Step 2: Adjust all lifting devices and supports, and adjust the rollers to the appropriate height. In this process, first adjust the power source of the lifting device to raise the support and bushing to the appropriate position. Then, remove the pin on the support and adjust the height of the support a second time according to the work requirements. After determining the required height, insert the pin into the fixing slot corresponding to the required height to fix the position of the support.

[0030] Step 3: Place the downhole tool on the rollers and push the downhole tool according to the work requirements and steps. At this time, after the worker places the downhole tool on the rollers for support, he pushes the downhole tool forward along the direction of the rollers to the front of the previous downhole tool to connect it. After the connection is completed, continue to push the downhole tool and place the next section of the downhole tool on the rollers. Repeat the above steps until the connection work is completed.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge base for connecting downhole tools, characterized in that, include: A vertical support (6) is provided with several rollers (7) at the top of the support (6). The rollers (7) are parallel to each other. The top of the rollers (7) contacts the downhole tool and supports the downhole tool. A bushing (5) is provided outside the support (6). A lifting device (4) is provided at the bottom of the bushing (5). The lifting device (4) is connected to a power source to control the height of the bushing (5). A support structure is provided outside the bushing (5). The support structure fixes the direction and position of the bushing (5) and the support (6). The height of the support (6) inside the bushing (5) is adjustable.

2. The connecting bridge for downhole tools according to claim 1, characterized in that, The outer surface of the roller (7) is provided with a buffer layer to reduce the friction between the roller (7) and the downhole tool.

3. The connecting bridge for downhole tools according to claim 1, characterized in that, The support mechanism includes an outer tube (3) and support rods (2). The outer tube (3) is sleeved on the outside of the bushing tube (5). Multiple support rods (2) are evenly arranged on the outer wall of the outer tube (3) along the circumference to fix the direction of the outer tube (3). The number of support rods (2) is at least three.

4. The connecting bridge for downhole tools according to claim 3, characterized in that, The support mechanism has a horizontally arranged base (1) at the bottom, the bottom end of the support rod (2) is fixed on the base (1), and the top end is connected to the outer wall of the appearance (3).

5. The connecting bridge for downhole tools according to claim 1, characterized in that, The bracket (6) has multiple radially penetrating fixing grooves arranged from top to bottom, and a pin (8) is provided in the fixing groove. The length of the pin (8) is greater than the diameter of the bushing (5). The height of the bracket (6) can be adjusted by adjusting the connection position between the pin (8) and the fixing groove.

6. The connecting bridge for downhole tools according to claim 1, characterized in that, The bracket (6) has two rollers (7) at its top.

7. The connecting bridge for downhole tools according to any one of claims 1-6, characterized in that, The roller (7) is provided with a conveyor chain on its surface. The roller (7) meshes with the conveyor chain. After the roller (7) comes into contact with the downhole tool, rotating the roller (7) will drive the downhole tool to move.

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