Center locator for casing pipe

Abstract

The utility model provides a center locator for a casing, and relates to the field of uranium mining. According to the device, a supporting wing is arranged on the outer wall of a casing pipe positioning body and connected with the casing pipe positioning body, a fixing structure and a rolling structure are arranged in the middle of the supporting wing, the fixing structure is connected with the supporting wing, the rolling structure is arranged in the fixing structure, and the rolling structure is connected with the supporting wing. A sand blocking groove is formed in the fixing structure; the sand blocking structure is arranged in the sand blocking groove, the wall face of the sand blocking structure makes contact with the wall face of the rolling structure, and when the rolling structure makes contact with the well wall and rotates, the sand blocking structure removes mud and sand on the wall face of the rolling structure. On one hand, the problem that a drill hole is scrapped due to the fact that a casing pipe is bent when entering the well wall is solved, and on the other hand, the problem that an existing positioner is jammed when entering the well wall is solved.

Description

Technical Field

[0001] The utility model relates to the field of uranium mining, in particular to a central locator for a casing. 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. The iron hoops increase the resistance of the casing entering the well wall. On the one hand, the casing bends when entering the well wall, resulting in the problem of the drilling being scrapped. On the other hand, when the casing enters the well wall, the existing positioner and the casing are both blocked. Therefore, there is an urgent need for a central positioner for the casing, which solves the problem of the casing bending when entering the well wall, resulting in the drilling being scrapped, and solves the problem of the existing positioner being blocked when entering the well wall. Utility Model Content

[0003] The purpose of the utility model is to provide a center locator for a casing to improve the above problem. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] A center locator for casing, comprising: a supporting wing is arranged on the outer wall of the casing positioning body, the supporting wing is connected to the casing positioning body, a fixed structure and a rolling structure are arranged in the middle of the supporting wing, the fixed structure is connected to the supporting wing, the rolling structure is arranged in the fixed structure, and a sand retaining groove is opened inside the fixed structure; a sand retaining structure, the sand retaining structure is arranged in the sand retaining groove, the wall surface of the sand retaining structure is in contact with the wall surface of the rolling structure, when the rolling structure is in contact with the well wall and the rolling structure rotates, the sand retaining structure removes mud and sand on the wall surface of the rolling structure.

[0005] Preferably, it further comprises a pressure ring, which is arranged on the end surface of the fixed structure, and is fixedly connected to the fixed structure, and the pressure ring presses the sand retaining structure to make the sand retaining structure close to the rolling structure.

[0006] Preferably, the sand retaining structure is an "O"-shaped structure.

[0007] Preferably, a rolling groove is formed on the end surface of the supporting wing, the fixing structure is arranged in the rolling groove, the bottom end of the fixing structure cooperates with the rolling groove, and the fixing structure is connected to the rolling groove.

[0008] Preferably, the fixing structure is a bead sleeve, the rolling structure is a ball, the bead sleeve is threadedly connected to the rolling groove, the ball is arranged in the bead sleeve, and the ball is snap-connected to the bead sleeve.

[0009] Preferably, it also includes a roller positioning piece, the fixed structure is a roller sleeve, the rolling structure is a roller, the roller sleeve is engaged with the rolling groove, roller fixing holes are opened in the middle of both sides of the roller sleeve, a roller connecting hole is opened in the middle of the roller, the roller positioning piece passes through the roller connecting hole and is connected to the roller fixing hole, and the roller positioning piece connects the roller and the roller sleeve.

[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 on the sleeve through a sealing fixing member, and the sleeve positioning body is fixed to the outer wall of the sleeve through the sealing ring.

[0011] Preferably, the top and bottom ends of the support wing are both arc-shaped transitioning to the end surface of the sleeve positioning body, both sides of the top surface of the support wing are arc-shaped, and both sides of the top surface transition to both sides of the bottom surface of the support wing, and the support wing is spirally arranged on the outer wall of the sleeve positioning body, and the spiral angle of the support wing is an included angle.

[0012] Preferably, the inner wall of the support wing 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 wing 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 rolling structure and a sand retaining structure, wherein the rolling structure is arranged on the supporting wing, and the casing positioning body directly enters the well wall through the rolling structure, thereby solving the problem in the prior art that the casing is bent when entering the well wall, resulting in the scrapping of the drilling hole, and the rolling structure contacts the well wall, and mud and sand are attached to the well wall of the rolling structure, and the rolling structure removes the mud and sand on the wall through the sand retaining structure, 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 This is a schematic diagram of the overall device of the ball bearing of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall device of the roller of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the ball bearing and the sand retaining structure of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the roller and the sand retaining structure of the utility model;

[0022] Markings in the figure:

[0023] 1. Casing positioning body; 2. Support wing; 3. Fixed structure; 4. Rolling structure; 5. Sand retaining groove; 6. Sand retaining structure; 7. Pressing ring; 8. Roller positioning piece; 11. Sealing ring; 12. Sealing fixing piece; 13. Body fixing hole. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] like Figures 1 to 3 As shown, a central locator for casing includes: a supporting wing 2 is arranged on the outer wall of the casing positioning body 1, the supporting wing 2 is connected to the casing positioning body 1, a fixed structure 3 and a rolling structure 4 are arranged in the middle of the supporting wing 2, the fixed structure 3 is connected to the supporting wing 2, the rolling structure 4 is arranged in the fixed structure 3, and a sand retaining groove 5 is opened inside the fixed structure 3; a sand retaining structure 6, the sand retaining structure 6 is arranged in the sand retaining groove 5, the wall surface of the sand retaining structure 6 contacts the wall surface of the rolling structure 4, when the rolling structure 4 contacts the well wall and the rolling structure 4 rotates, the sand retaining structure 6 removes the mud and sand on the wall surface of the rolling structure 4. In the working process of the utility model, the casing positioning body 1 is sleeved on the casing, and the casing positioning body 1 positions the casing, which solves the problem that the existing positioner is easy to bend and cannot position the casing. The support wing 2 is spirally arranged on the outer wall of the casing positioning body 1. The support wing 2 can smoothly enter the well wall with the casing and play a role in centering the casing. The casing positioning body 1 is moved up and down along the well wall through the rolling structure 4. When the rolling structure 4 contacts the well wall, the rolling structure 4 rotates and drives the sand retaining structure 6 to rotate along the sand retaining groove 5. The mud and sand attached to the wall of the rolling structure 4 are cleared by the sand retaining structure 6. The sand retaining structure 6 solves the problem of the casing being stuck when entering the well wall.

[0027] like Figure 3 As shown, in the present invention, a pressure ring 7 is further included, and the pressure ring 7 is arranged on the end surface of the fixed structure 3, and the pressure ring 7 is fixedly connected to the fixed structure 3, and the pressure ring 7 presses the sand retaining structure 6 to make the sand retaining structure 6 close to the rolling structure 4. The pressure ring 7 limits the rolling structure 4 to prevent loosening, thereby ensuring the safe operation of the rolling structure 4.

[0028] Furthermore, the sand retaining structure 6 is an "O"-shaped structure. The "O"-shaped structure contacts the rolling structure 4, and the rolling structure 4 rotates to drive the "O"-shaped structure to rotate along the sand retaining groove 5, and the "O"-shaped structure removes mud and sand on the wall of the rolling structure 4.

[0029] In order to clarify the connection method between the support wing 2 and the fixed structure 3, a rolling groove is opened on the end face of the support wing 2, the fixed structure 3 is arranged in the rolling groove, the bottom end of the fixed structure 3 cooperates with the rolling groove, and the fixed structure 3 is connected to the rolling groove.

[0030] like Figures 1 to 4As shown, the fixed structure 3 is a bead sleeve, the rolling structure 4 is a ball, the bead sleeve is threadedly connected to the rolling groove, the ball is arranged in the bead sleeve, and the ball is snap-connected with the bead sleeve. The end face of the ball is exposed from the end face of the bead sleeve, and the ball is in contact with the well wall. Preferably, the outer ring surface of the bead sleeve is provided with a thread, the rolling groove is provided with a matching thread, and the bead sleeve can be disassembled and replaced in the rolling groove at will. Another embodiment is: it also includes a roller positioning member 8, the fixed structure 3 is a roller sleeve, the rolling structure 4 is a roller, the roller sleeve is snap-connected with the rolling groove, roller fixing holes are opened in the middle of both sides of the roller sleeve, a roller connecting hole is opened in the middle of the roller, the roller positioning member 8 passes through the roller connecting hole and is connected to the roller fixing hole, and the roller positioning member 8 connects the roller and the roller sleeve. One end of the roller is arranged in the roller sleeve, and the other end of the roller contacts the well wall. The roller sleeve limits the rotation direction of the roller. The arrangement of the roller reduces the friction resistance of 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 on the sleeve by a sealing fixing member 12, and the sleeve positioning body 1 is fixed on 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 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 wing 2 are both arc-shaped transitions to the end surface of the casing positioning body 1, the two sides of the top surface of the support wing 2 are arc-shaped, the two sides of the top surface transition to the two sides of the bottom surface of the support wing 2, the support wing 2 is spirally arranged on the outer wall of the casing positioning body 1, and the spiral angle of the support wing 2 is an angle. In this structure, the middle height of the support wing 2 is the same, the upper and lower ends of the support wing 2 are arc-shaped transitions to the upper and lower end surfaces of the casing positioning body 1, the end surface and the two sides of the top surface of the support wing 2 are set to be arc-shaped to facilitate the casing to enter the well wall, the support wing 2 and the axis of 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 wing 2, the inner wall of the support wing 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 screw passes through the body fixing hole 13, and the fastening screw is connected to the support fixing hole. The fastening screw fixes the support wing 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 center locator for a casing, characterized in that: include: A casing positioning body (1), wherein a support wing (2) is arranged on the outer wall of the casing positioning body (1), the support wing (2) is connected to the casing positioning body (1), a fixed structure (3) and a rolling structure (4) are arranged in the middle of the support wing (2), the fixed structure (3) is connected to the support wing (2), the rolling structure (4) is arranged in the fixed structure (3), and a sand retaining groove (5) is opened inside the fixed structure (3); A sand retaining structure (6), wherein the sand retaining structure (6) is arranged in the sand retaining groove (5), and the wall surface of the sand retaining structure (6) contacts the wall surface of the rolling structure (4). When the rolling structure (4) contacts the well wall and the rolling structure (4) rotates, the sand retaining structure (6) removes mud and sand on the wall surface of the rolling structure (4).

2. The center locator for casing according to claim 1, characterized in that: It also includes a pressure ring (7), which is arranged on the end surface of the fixed structure (3), and the pressure ring (7) is fixedly connected to the fixed structure (3). The pressure ring (7) presses the sand retaining structure (6) so that the sand retaining structure (6) is closely attached to the rolling structure (4).

3. The center locator for casing according to claim 1, characterized in that: The sand retaining structure (6) is an "O"-shaped structure.

4. The center locator for casing according to claim 1, characterized in that: The end surface of the support wing (2) is provided with a rolling groove, the fixed structure (3) is arranged in the rolling groove, the bottom end of the fixed structure (3) cooperates with the rolling groove, and the fixed structure (3) is connected to the rolling groove.

5. The center locator for casing according to claim 4, characterized in that: The fixing structure (3) is a bead sleeve, the rolling structure (4) is a ball, the bead sleeve is threadedly connected to the rolling groove, the ball is arranged in the bead sleeve, and the ball is snap-connected to the bead sleeve.

6. The center locator for casing according to claim 4, characterized in that: It also includes a roller positioning member (8), the fixing structure (3) is a roller sleeve, the rolling structure (4) is a roller, the roller sleeve is engaged with the rolling groove, roller fixing holes are provided in the middle of both sides of the roller sleeve, a roller connecting hole is provided in the middle of the roller, the roller positioning member (8) passes through the roller connecting hole and is connected to the roller fixing hole, and the roller positioning member (8) connects the roller and the roller sleeve.

7. The center locator for casing according to claim 1, characterized in that: The inner wall of the sleeve positioning body (1) is provided with a positioning groove in the circumferential direction, 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 center locator for casing according to claim 1, characterized in that: The top and bottom ends of the support wing (2) are both arc-shaped transitioning to the end surface of the sleeve positioning body (1), both sides of the top surface of the support wing (2) are arc-shaped, and both sides of the top surface transition to both sides of the bottom surface of the support wing (2), the support wing (2) is spirally arranged on the outer wall of the sleeve positioning body (1), and the spiral angle of the support wing (2) is an included angle.

9. The center locator for casing according to claim 1, characterized in that: The inner wall of the support wing (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 wing (2) on the sleeve positioning body (1).

10. The center locator for casing according to claim 1, characterized in that: The sleeve positioning body (1) is made of nylon.

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