Downhole casing power guiding device

Abstract

The utility model relates to the technical field of petroleum drilling, in particular to an underground casing power guiding device. The downhole casing power guiding device comprises a bottom plate, and a guiding assembly for casing running of a downhole casing is arranged at the top of the bottom plate. The guiding assembly comprises a bearing disc and a guiding roller, the bearing disc is fixedly installed on the bottom plate, two sets of symmetrically-distributed supporting pieces a are arranged at the top of the bearing disc, two sets of symmetrically-distributed supporting pieces b are erected at the positions, staggered with the supporting pieces a, of the top of the bearing disc, and the bottoms of the supporting pieces a and the bottoms of the supporting pieces b are in sliding connection with the top of the bottom plate. According to the power guiding device for the underground casing pipe, through the arrangement of the guiding cylinder, when the underground casing pipe is sleeved and installed, the guiding cylinder can guide the falling end of the guide pipe, the bottom end of the casing pipe can be rapidly aligned with the top end of the lower casing pipe, and therefore the alignment portability can be improved when the casing pipe is sleeved.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, and in particular to a downhole casing power steering device. Background Technology

[0002] Downhole casing is an important piece of equipment used in oil and gas drilling projects to reinforce the wellbore and maintain wellbore stability. It is a string of multiple steel pipes connected together. After being run into the wellbore, it is cemented to form a permanent barrier. It is mainly used in oil and gas extraction, geothermal development and other fields.

[0003] During the process of running casing in a well, the frictional resistance is relatively large when the outer wall of the casing comes into direct contact with the wellhead, and the wellhead is also more likely to be damaged due to collision.

[0004] Therefore, it is necessary to provide a new downhole casing power steering device to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a downhole casing power steering device.

[0006] The downhole casing power guiding device provided by this utility model includes: a base plate, and a guiding component for lowering the downhole casing is provided on the top of the base plate;

[0007] The guiding assembly includes a support tray and a guide roller. The support tray is fixedly installed on the base plate. The top of the support tray is provided with two sets of symmetrically distributed support plates a. The top of the support tray and the support plates a are provided with two sets of symmetrically distributed support plates b. The bottom of the support plates a and the support plates b are slidably connected to the top of the base plate.

[0008] The guide rollers are provided in multiple and are evenly distributed on the horizontal plane at the ends of the corresponding support pieces a and b. Each group of support pieces a and b consists of two pieces and is symmetrically distributed. The support pieces a and b in the same group are rotatably connected to the corresponding guide rollers.

[0009] A guide cylinder is installed above the base plate to position and guide the downhole casing.

[0010] Preferably, the height of the support piece a is greater than the height of the support piece b, and the guide rollers in the support piece a and the guide rollers in the support piece b are arranged in a grid pattern.

[0011] Preferably, a plurality of annularly distributed support rods are fixedly installed on the outer wall of the guide cylinder, the bottom end of the support rods is fixedly connected to the top of the support tray, and the center point of the guide cylinder and the center point of the plurality of guide rollers are on the same vertical line.

[0012] Preferably, a mounting plate is fixedly connected between each of the two adjacent support pieces a and b on the top of the support tray. A spring is fixedly connected to each of the two side walls of the mounting plate. An adapter piece is fixedly installed on the side wall of the spring away from the mounting plate, and the outer wall of the adapter piece is fixedly connected to the corresponding support piece a and support piece b.

[0013] Preferably, the top of the tray is provided with two sets of symmetrically distributed uprights, and a guide frame with the same fixed connection is provided between the multiple uprights.

[0014] Preferably, the guide frame has a sliding block inside, and the outer wall of the sliding block is fixedly connected to the outer walls of the corresponding support piece a and support piece b.

[0015] Preferably, the parts inside the base plate and the support tray that are opposite to the center of the guide cylinder are both open structures.

[0016] Compared with related technologies, the downhole casing power steering device provided by this utility model has the following beneficial effects:

[0017] 1. By setting a guide cylinder, this utility model can guide the end of the guide tube as it falls during the installation of the downhole casing, so that the bottom end of the casing can be quickly aligned with the top end of the casing below, thereby improving the portability of alignment when the casing is installed.

[0018] 2. By setting up a guiding component, when the sleeve is connected and installed, the side wall of the downward-moving sleeve will abut against the outer wall of the guide roller in the guiding component, thereby reducing the friction force of the sleeve moving downward and thus improving the smoothness of the sleeve falling.

[0019] 3. By adjusting the movable arrangement of support plate a and support plate b, during the guiding process of the sleeve, when the connection part of the two sleeves abuts against the guide tube, the relatively larger connection part will squeeze the guide roller, thereby causing the guide roller to drive the corresponding support plate a and support plate b to move outward. This avoids the guide roller from obstructing the fall of the sleeve, thus making the fall of the sleeve smoother. Attached Figure Description

[0020] Figure 1 A schematic diagram of a preferred embodiment of the downhole casing power steering device provided by this utility model;

[0021] Figure 2 for Figure 1 The diagram shows the structure of the guide component.

[0022] Figure 3 for Figure 2 A partial structural diagram of the guide component is shown;

[0023] Figure 4 for Figure 2 The enlarged structural diagram of part A is shown below.

[0024] The following are the labels in the diagram: 1. Base plate; 2. Guide cylinder; 21. Support rod; 3. Guide assembly; 31. Support tray; 32. Upright pole; 321. Guide frame; 33. Support piece a; 34. Support piece b; 35. Guide roller; 36. Sliding block; 4. Mounting plate; 41. Spring; 42. Adapter piece. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0027] Please see Figures 1 to 4 The present invention provides a downhole casing power steering device, which includes a base plate 1.

[0028] In the embodiments of this utility model, please refer to Figures 1 to 4 The bottom plate 1 is equipped with a guide assembly 3 for the downhole casing;

[0029] The guide assembly 3 includes a support tray 31 and guide rollers 35. The support tray 31 is fixedly mounted on the base plate 1. Two sets of symmetrically distributed support plates a33 are provided on the top of the support tray 31. Two sets of symmetrically distributed support plates b34 are mounted at the intersection of the top of the support tray 31 and the support plates a33. The bottoms of the support plates a33 and b34 are slidably connected to the top of the base plate 1. Multiple guide rollers 35 are provided and evenly distributed on the horizontal planes corresponding to the ends of the support plates a33 and b34. Each set of support plates a33 and b34 consists of two symmetrically distributed rollers. Both plate a33 and support plate b34 are rotatably connected to the corresponding guide rollers 35; a guide cylinder 2 is erected above the base plate 1 to position and guide the downhole casing. The height of support plate a33 is greater than the height of support plate b34, and the guide rollers 35 in support plate a33 and support plate b34 are distributed in a grid pattern. Multiple ring-shaped support rods 21 are fixedly installed on the outer wall of the guide cylinder 2. The bottom end of the support rod 21 is fixedly connected to the top of the support plate 31, and the center point of the guide cylinder 2 and the center point of the multiple guide rollers 35 are on the same vertical line.

[0030] It should be noted that the guide cylinder 2 is designed to guide the falling end of the guide tube during the installation of the downhole casing, allowing the bottom end of the casing to quickly align with the top end of the casing below, thereby improving the ease of casing alignment. Furthermore, the staggered guide rollers 35, during the casing lowering operation, smoothly abut against the outer wall of the casing in four directions (north, south, east, and west), effectively converting the frictional force in multiple directions during casing lowering. This not only guides the casing lowering but also reduces friction during casing lowering, making the casing lowering process smoother.

[0031] In the embodiments of this utility model, please refer to Figures 1 to 4 Mounting plates 4 are fixedly connected between two adjacent support plates a33 and b34 on the top of the pallet 31. Springs 41 are fixedly connected to both sides of the mounting plate 4. A transition piece 42 is fixedly installed on the side wall of the spring 41 away from the mounting plate 4, and the outer wall of the transition piece 42 is fixedly connected to the corresponding support plate a33 and support plate b34. The top of the pallet 31 is provided with two sets of symmetrically distributed uprights 32, and a guide frame 321 with the same fixed connection is provided between multiple uprights 32. The guide frame 321 is provided with a sliding block 36 inside, and the outer wall of the sliding block 36 is fixedly connected to the outer wall of the corresponding support plate a33 and support plate b34.

[0032] It should be noted that: through the sliding connection between the sliding block 36 and the guide frame 321, when the support piece a33 and the support piece b34 move under the downward force of the sleeve during use, the guide frame 321 can guide the movement trajectory of the support piece a33 and the support piece b34 through the sliding block 36, thereby driving the top guide roller 35 to expand outward evenly, thus making the movement of the guide tube more stable;

[0033] When the lowering sleeve docking part moves out of the guide roller 35, the spring 41 will pull the support plate a33 and support plate b34 through its own force, thereby resetting the guide roller 35, so that the guide roller 35 always abuts against the outer wall of the sleeve for guiding operation.

[0034] In the embodiments of this utility model, please refer to Figures 1 to 4 The parts inside the base plate 1 and the support tray 31 that are opposite to the center of the guide cylinder 2 are both open structures.

[0035] It should be noted that by setting the center of the bottom plate 1 and the support plate 31 as an open structure, the casing can smoothly pass through the bottom plate 1 and the support plate 31 and move downward during the process of installing the downhole casing.

[0036] The working principle of the downhole casing power steering device provided by this utility model is as follows:

[0037] When using this device, the base plate 1 can be fixedly installed at the end of the wellhead. Later, when installing the downhole casing, the guide cylinder 2 located on the base plate 1 will guide the bottom end of the falling casing, so that the bottom end of the casing can be inserted into the wellhead more smoothly, making the descent and alignment of the casing more convenient and faster.

[0038] After the casing alignment is completed, as the casing continues to be lowered, the outer wall of the guide roller 35 in the guide assembly 3 will abut against the outer wall of the casing. At this time, the downward-moving casing will drive the guide roller 35 to rotate through abutting against the guide roller 35. The rotating guide roller 35 will change the sliding friction between the casing and the wellhead into rolling friction, thereby reducing the friction force of the casing moving downward and making the casing move more smoothly.

[0039] Since the support plates a33 and b34 are slidably installed, during the movement of the downhole casing, when the two casing joints abut against the outer wall of the guide roller 35, the compressive force will drive the corresponding support plates a33 and b34 through the guide roller 35, thereby causing the guide roller 35 to expand, making the downhole casing movement smoother and reducing the obstruction to the downhole casing movement.

[0040] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A downhole casing dynamic guide device, characterized in that: include: A bottom plate (1), wherein a guide assembly (3) for lowering a casing downhole is provided on the top of the bottom plate (1); The guide assembly (3) comprises a support tray (31) and a guide roller (35), the support tray (31) being fixedly mounted on the bottom plate (1), the top of the support tray (31) being provided with two groups of symmetrically distributed support sheets a (33), the top of the support tray (31) being provided with two groups of symmetrically distributed support sheets b (34) being arranged at the intersection of the top of the support tray (31) and the support sheets a (33), and the bottoms of the support sheets a (33) and the support sheets b (34) being slidably connected to the top of the bottom plate (1); The guide rollers (35) are provided in plurality and are evenly distributed on the horizontal planes corresponding to the ends of the support sheets a (33) and the support sheets b (34); each group of the support sheets a (33) and the support sheets b (34) is composed of two and are symmetrically distributed; the support sheets a (33) and the support sheets b (34) in the same group are rotatably connected to the corresponding guide rollers (35); A guide cylinder (2) for positioning and guiding the lowering of a casing in a well is mounted above the bottom plate (1).

2. The downhole casing dynamic steering device according to claim 1, characterized in that: The height of the support sheet a (33) is greater than the height of the support sheet b (34), and the guide rollers (35) in the support sheet a (33) and the guide rollers (35) in the support sheet b (34) are distributed in a tic-tac-toe pattern.

3. The downhole casing dynamic steering device according to claim 2, characterized in that: A plurality of annularly distributed support rods (21) are fixedly mounted on the outer wall of the guide cylinder (2), the bottom ends of the support rods (21) are fixedly connected to the top of the support tray (31), and the center point of the guide cylinder (2) and the center point around which the plurality of guide rollers (35) are surrounded are on the same vertical line.

4. The downhole casing dynamic guiding device according to claim 3, characterized in that: A mounting plate (4) is fixedly mounted between two adjacent support plates a (33) and support plate b (34) at the top of the support tray (31); springs (41) are fixedly mounted on both side walls of the mounting plate (4); a transfer plate (42) is fixedly mounted on a side wall of the spring (41) away from the mounting plate (4); and an outer wall of the transfer plate (42) is fixedly connected to the corresponding support plate a (33) and support plate b (34).

5. The downhole casing dynamic steering device according to claim 4, characterized in that: Two groups of symmetrically distributed vertical rods (32) are provided on the top of the support tray (31), and a guide frame (321) that is fixedly connected to the vertical rods (32) is provided between the plurality of vertical rods (32).

6. The downhole casing dynamic guiding device according to claim 5, characterized in that: A sliding block (36) which is slidably connected is provided inside the guide frame (321), and an outer wall of the sliding block (36) is fixedly connected to the outer walls of the corresponding support sheet a (33) and support sheet b (34).

7. The downhole casing dynamic steering device according to claim 1, characterized in that: The interior of the bottom plate (1) and the support tray (31) that are opposite to the center of the guide cylinder (2) are both open structures.

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