Casing pipe positioning device for downhole operation

Abstract

The utility model provides a casing pipe positioning device for underground operation, and relates to the field of uranium mining. According to the device, a sleeve positioning body is tubular, at least two supporting structures are arranged on the outer wall of the sleeve positioning body, all the supporting structures are evenly distributed in the circumferential direction of the sleeve positioning body, and the supporting structures are vertically arranged in the length direction of the sleeve positioning body; a supporting groove is formed by the two supporting structures and the outer wall of the sleeve positioning body; the support structure is transversely arranged along the outer diameter of the casing pipe positioning body, the two ends of the support structure are connected with the side walls of the two supporting structures respectively, a flow guide groove is formed in the end face of the support structure, and when the casing pipe positioning body enters the well wall, the supporting grooves and the flow guide groove provide channels for slurry. On one hand, the problem that the iron hoop is bent and cannot position the casing pipe is solved, and on the other hand, the problem that the iron hoop and the casing pipe enter the well wall and are blocked is solved.

Description

Technical Field

[0001] The utility model relates to the field of uranium mining, in particular to a casing positioning device used for underground operations. Background Art

[0002] In the existing uranium mining technology field, there are mainly iron hoops, which are sleeved on the casing and used to position the casing. On the one hand, the iron hoops are easy to bend when the casing is heavy, which makes it impossible to position the casing. On the other hand, the iron hoops and the casing are blocked when entering the well wall. Therefore, there is an urgent need for a casing positioning device for underground operations, which solves the problem that the iron hoop is bent and the casing cannot be positioned, and solves the problem that the iron hoop and the casing are blocked when entering the well wall. Utility Model Content

[0003] The purpose of the utility model is to provide a casing positioning device for underground operations to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] A casing positioning device for underground operations, comprising: a casing positioning body, the casing positioning body is tubular, and at least two supporting structures are arranged on the outer wall of the casing positioning body, all of the supporting structures are evenly distributed along the circumference of the casing positioning body, the supporting structures are vertically arranged along the length direction of the casing positioning body, and two of the supporting structures and the outer wall of the casing positioning body form supporting grooves; a bracket structure, the bracket structure is transversely arranged along the outer diameter of the casing positioning body, the two ends of the bracket structure are respectively connected to the side walls of the two supporting structures, and the end face of the bracket structure is provided with a guide groove, when the casing positioning body enters the well wall, the support groove and the guide groove provide a channel for mud.

[0005] Preferably, the guide groove is a rectangular structure.

[0006] Preferably, a plurality of the guide grooves are evenly provided on the support structure, and the plurality of the guide grooves are arranged in a circular array, and the axes of the plurality of the guide grooves and the axis of the support structure are located on the same axis.

[0007] Preferably, the thickness of the bracket structure is smaller than the thickness of the supporting structure.

[0008] Preferably, the cross-section of the guide groove is "V"-shaped or "U"-shaped.

[0009] Preferably, a rolling groove is formed on the end surface of the support structure, and a sand reducing and blocking structure is arranged in the rolling groove. When the sand reducing and blocking structure contacts the well wall, the casing positioning body moves up and down along the well wall through the sand reducing and blocking structure.

[0010] Preferably, a positioning groove is circumferentially formed on the inner wall of the sleeve positioning body, a sealing ring is arranged in the positioning groove, the sealing ring is pressed onto the sleeve via a sealing fixing member, and the sleeve positioning body is fixed to the outer wall of the sleeve via the sealing ring.

[0011] Preferably, the top and bottom ends of the support structure both transition to the end surface of the sleeve positioning body in an arc shape, and both sides of the top surface of the support structure are arc-shaped, and both sides of the top surface transition to both sides of the bottom surface of the support structure.

[0012] Preferably, the inner wall of the support structure is provided with a support fixing hole, the sleeve positioning body is provided with a plurality of body fixing holes, a fastening screw passes through the body fixing hole, the fastening screw is connected to the support fixing hole, and the fastening screw fixes the support structure on the sleeve positioning body.

[0013] Preferably, the sleeve positioning body is made of nylon.

[0014] The beneficial effects of this structure are:

[0015] The utility model introduces a bracket structure, which is laterally arranged on a casing positioning body. The bracket structure circumferentially reinforces the casing positioning body to avoid breakage of the casing positioning body and the casing when entering the well wall, thereby solving the problem that the existing positioner is bent and cannot position the casing. The bracket structure is provided with a guide groove, and a support groove is formed by two support structures and the outer wall of the casing positioning body. The guide groove and the support groove are jointly arranged to provide a channel for mud in the well wall, thereby solving the problem that the existing positioner is blocked when entering the well wall.

[0016] Other features and advantages of the utility model will be described in the following description, and some of them will become obvious from the description, or be understood by implementing the embodiments of the utility model. The purpose and other advantages of the utility model can be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall device of the utility model;

[0019] Figure 2 This is a schematic diagram of the support structure of the utility model;

[0020] Markings in the figure:

[0021] 1. Casing positioning body; 2. Support structure; 3. Bracket structure; 4. Sand reduction and blocking structure; 11. Sealing ring; 12. Sealing fixing piece; 13. Body fixing hole; 21. Support groove; 31. Diversion groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0023] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] like Figure 1As shown, a casing positioning device for downhole operations comprises: a casing positioning body 1, the casing positioning body 1 is tubular, and at least two supporting structures 2 are arranged on the outer wall of the casing positioning body 1, all of the supporting structures 2 are evenly distributed along the circumference of the casing positioning body 1, the supporting structures 2 are vertically arranged along the length direction of the casing positioning body 1, and two of the supporting structures 2 and the outer wall of the casing positioning body 1 form supporting grooves 21; a bracket structure 3, the bracket structure 3 is transversely arranged along the outer diameter of the casing positioning body 1, the two ends of the bracket structure 3 are respectively connected to the side walls of the two supporting structures 2, and the end face of the bracket structure 3 is provided with a guide groove 31, when the casing positioning body 1 enters the well wall, the supporting groove 21 and the guide groove 31 provide a channel for mud.

[0025] The specific implementation process of this device is as follows: the casing positioning body 1 is sleeved on the casing, and the casing positioning body 1 positions the casing, solving the problem that the existing positioner is bent and cannot position the casing. The support structure 2 can not only smoothly enter the well wall with the casing, but also play a role in centering the casing. The support structure 3 is transversely arranged in the middle of the casing positioning body 1 along the outer diameter of the casing positioning body 1. The support structure 3 improves the overall bearing capacity of the casing positioning body 1. The end face of the support structure 3 is provided with a guide groove 31. The guide groove 31 generates a swirl flow on the mud on the well wall, reducing the resistance of the casing positioning body 1 entering the well wall.

[0026] In the present invention, the guide groove 31 is a rectangular structure, which is beneficial to the drainage of mud in the well wall.

[0027] In order to clarify the specific setting of the guide groove 31, a plurality of the guide grooves 31 are evenly opened on the support structure 3, and the plurality of the guide grooves 31 are arranged in a circular array, and the axis of the plurality of the guide grooves 31 and the axis of the support structure 2 are located on the same axis.

[0028] Since the support structure 3 in this structure needs to reduce the resistance of the casing positioning body 1 entering the well wall: the thickness of the support structure 3 is smaller than the thickness of the support structure 2.

[0029] Other configurations of the guide groove 31: The cross section of the guide groove 31 is "V"-shaped or "U"-shaped. Both the "V"-shaped configuration and the "U"-shaped configuration can stably withstand the mud pressure and reduce the resistance of the mud flow.

[0030] like Figure 2As shown, the end surface of the support structure 2 is provided with a rolling groove, and a sand reducing and blocking structure 4 is arranged in the rolling groove. When the sand reducing and blocking structure 4 contacts the well wall, the casing positioning body 1 moves up and down along the well wall through the sand reducing and blocking structure 4. The setting of the sand reducing and blocking structure 4 reduces the friction resistance of the casing positioning body 1 and the casing entering the well wall.

[0031] In the present invention, a positioning groove is provided in the circumferential direction of the inner wall of the sleeve positioning body 1, a sealing ring 11 is provided in the positioning groove, the sealing ring 11 is pressed against the sleeve by a sealing fixing member 12, and the sleeve positioning body 1 is fixed to the outer wall of the sleeve by the sealing ring 11. The common arrangement of the sealing ring 11 and the sealing fixing member 12 enables the sleeve positioning body 1 to be fixed on the sleeve, solving the problem that the existing positioner cannot adjust the size so that the sleeve can enter the interior of the sleeve positioning body 1 and the sleeve positioning body 1 can be fixed on the sleeve.

[0032] like Figure 2 As shown, the top and bottom ends of the support structure 2 are both arc-shaped transitions to the end surface of the casing positioning body 1, and both sides of the top surface of the support structure 2 are arc-shaped, and both sides of the top surface transition to both sides of the bottom surface of the support structure 2. In this structure, the middle height of the support structure 2 is the same, and the upper and lower ends of the support structure 2 are arc-shaped transitions to the upper and lower end surfaces of the casing positioning body 1. The end surface and both sides of the top surface of the support structure 2 are set to be arc-shaped to facilitate the casing to enter the well wall. The axis of the support structure 2 and the casing positioning body 1 are usually at an angle of 30°, which reduces the risk of the casing being stuck during the downhole process.

[0033] In order to clarify the specific structure of the support structure 2, the inner wall of the support structure 2 is provided with a support fixing hole, and the sleeve positioning body 1 is provided with a plurality of body fixing holes 13. The fastening screws pass through the body fixing holes 13. The fastening screws are connected to the support fixing holes, and the fastening screws fix the support structure 2 on the sleeve positioning body 1.

[0034] In the present invention, the casing positioning body 1 is made of nylon material. On the one hand, the casing positioning body 1 is made of nylon material, which has certain flexibility. On the other hand, the casing positioning body 1 is made of nylon material, which effectively solves the problem of chemical corrosion of traditional metal casings underground.

[0035] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A casing positioning device for downhole operations, characterized in that: include: A sleeve positioning body (1), the sleeve positioning body (1) is tubular, and at least two supporting structures (2) are arranged on the outer wall of the sleeve positioning body (1), all the supporting structures (2) are evenly distributed along the circumference of the sleeve positioning body (1), the supporting structures (2) are vertically arranged along the length direction of the sleeve positioning body (1), and the two supporting structures (2) and the outer wall of the sleeve positioning body (1) form a supporting groove (21); A support structure (3), wherein the support structure (3) is transversely arranged along the outer diameter of the casing positioning body (1), the two ends of the support structure (3) are respectively connected to the side walls of the two support structures (2), and the end surface of the support structure (3) is provided with a guide groove (31). When the casing positioning body (1) enters the well wall, the support groove (21) and the guide groove (31) provide a channel for mud.

2. The casing positioning device for downhole operation according to claim 1, characterized in that: The flow guide groove (31) is a rectangular structure.

3. The casing positioning device for downhole operation according to claim 2, characterized in that: A plurality of guide grooves (31) are evenly arranged on the support structure (3), the plurality of guide grooves (31) are arranged in a circular array, and the axis centers of the plurality of guide grooves (31) and the axis center of the support structure (2) are located on the same axis.

4. The casing positioning device for downhole operation according to claim 3, characterized in that: The thickness of the support structure (3) is smaller than the thickness of the support structure (2).

5. The casing positioning device for downhole operation according to claim 1, characterized in that: The cross section of the guide groove (31) is in a "V" shape or a "U" shape.

6. The casing positioning device for downhole operation according to claim 1, characterized in that: The end surface of the support structure (2) is provided with a rolling groove, and a sand-reducing and blocking structure (4) is arranged in the rolling groove. When the sand-reducing and blocking structure (4) contacts the well wall, the casing positioning body (1) moves up and down along the well wall through the sand-reducing and blocking structure (4).

7. The casing positioning device for downhole operation according to claim 1, characterized in that: The inner wall of the sleeve positioning body (1) is provided with a positioning groove in the circumference, a sealing ring (11) is arranged in the positioning groove, the sealing ring (11) is pressed against the sleeve through a sealing fixing member (12), and the sleeve positioning body (1) is fixed to the outer wall of the sleeve through the sealing ring (11).

8. The casing positioning device for downhole operation according to claim 1, characterized in that: The top and bottom ends of the support structure (2) both transition to the end surface of the sleeve positioning body (1) in an arc shape, and both sides of the top surface of the support structure (2) are arc-shaped, and both sides of the top surface transition to both sides of the bottom surface of the support structure (2).

9. The casing positioning device for downhole operation according to claim 1, characterized in that: The inner wall of the support structure (2) is provided with a support fixing hole, the sleeve positioning body (1) is provided with a plurality of body fixing holes (13), a fastening screw passes through the body fixing hole (13), the fastening screw is connected to the support fixing hole, and the fastening screw fixes the support structure (2) on the sleeve positioning body (1).

10. The casing positioning device for downhole operation according to any one of claims 1 to 9, characterized in that: The sleeve positioning body (1) is made of nylon.

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