Wellhead anti-falling device

Abstract

The utility model belongs to the technical field of coal-bed gas well exploitation, and discloses a wellhead anti-falling device. The wellhead anti-falling device comprises a cover plate body, the cover plate body is used for covering a wellhead, a penetrating opening is formed in the cover plate body, and a pipe column penetrates through the penetrating opening; a penetrating opening is formed in the cover plate body, a plurality of kerfs are formed in the cover plate body in the circumferential direction of the penetrating opening, the kerfs extend to the penetrating opening, an independent clamping and stopping block is formed between every two adjacent kerfs in the circumferential direction, and the clamping and stopping blocks can be elastically bent in the axial direction of the tubular column so as to abut against the tubular column; a clamping seam is formed in the edge of the cover plate body and extends to the penetrating opening, and the cover plate bodies on the two sides of the clamping seam can be away from each other to avoid the pipe column. The clamping and stopping block of the wellhead anti-falling device can be elastically bent in the axial direction of the tubular column so as to abut against the tubular column, so that the wellhead anti-falling device can be tightly attached to the tubular columns with different pipe diameters, the wellhead anti-falling device is suitable for the tubular columns with different diameters, and the application range of the tubular columns is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of coalbed methane well mining, in particular to a wellhead anti-falling device. Background Art

[0002] During the construction of coalbed methane well repair operations, in order to prevent the repair tools near the wellhead from falling into the well, it is usually necessary to set a protective cover at the wellhead. For example, when disassembling and assembling the centralizer at the pipe string coupling, it is necessary to prevent the disassembly and assembly tools from falling into the well. Existing wellhead protective covers are mostly flexible protective nets or plastic bags, which have weak bearing capacity and cannot effectively prevent some heavy objects from falling. Some construction sites use hard protective plates made of metal, which cannot be used for pipes of different diameters and are prone to rigid scratches and collisions with the pipe string, so they are less practical. Utility Model Content

[0003] The utility model aims to provide a wellhead anti-falling device, which can be suitable for pipes with different diameters to pass through, and can also maintain a good shielding effect.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a wellhead anti-falling device, comprising:

[0006] A cover plate body, the cover plate body is used to cover the wellhead, and a penetration opening is opened on the cover plate body, and the penetration opening is used to penetrate the pipe column;

[0007] The cover plate body is provided with a plurality of slits along the circumference of the penetration opening, the slits extending to the penetration opening, and an independent stopper is formed between two adjacent slits along the circumference, and the stopper can be elastically bent along the axial direction of the pipe column to abut against the pipe column;

[0008] A slot is formed at the edge of the cover plate body, and the slot extends to the penetration opening. The cover plate bodies on both sides of the slot can be spaced apart from each other to avoid the pipe column.

[0009] Preferably, the wellhead anti-fall device further comprises a connecting structure, wherein the connecting structure is arranged on the cover plate body, and the connecting structure is used to connect the cover plate body at both sides of the slot.

[0010] Preferably, the connection structure comprises an adhesive velvet surface and an adhesive hook surface provided on the cover plate body at both sides of the card seam, and the adhesive velvet surface and the adhesive hook surface are capable of bonding.

[0011] Preferably, one end of the connection structure is arranged on the cover body on one side of the slot, and the other end of the connection structure can be detachably passed through the cover body on the other side of the slot.

[0012] Preferably, the slot extends radially along the penetration opening.

[0013] Preferably, the cover plate body is made of rubber.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a wellhead anti-falling device, in which the cover plate body is used to cover the wellhead, and since a penetration opening is provided on the cover plate body, the penetration opening is used to penetrate the pipe column, so the cover plate body can allow the pipe column to pass normally and go down into the well while covering the wellhead, so as to prevent construction tools and debris of wellhead accessories from falling into the well and affecting the downhole construction; since a plurality of slits extending to the penetration opening are provided on the cover plate body along the circumference of the penetration opening, independent stop blocks are formed between two adjacent slits, and the stop blocks can be elastically bent along the axial direction of the pipe column to abut against the pipe column, so when pipe columns of different diameters are inserted When the hole is penetrated, the blocking block can always press against the outer wall of the pipe string by elastic deformation, so that the wellhead anti-falling device can be suitable for pipe strings of different diameters, thereby improving the application range of the pipe string; since a clamping seam is also provided on the edge of the cover plate body, the clamping seam extends to the penetration hole, and the cover plate bodies on both sides of the clamping seam can move away from each other to avoid the pipe string, the wellhead anti-falling device can be quickly removed from the pipe string by separating the cover plate bodies on both sides of the clamping seam, so as to avoid the friction between the pipe string and the cover plate body when lowering, thereby affecting the lowering of the pipe string or damaging the pipe string, and the operation is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the wellhead anti-fall device provided in a specific embodiment of the utility model.

[0017] In the figure:

[0018] 1-cover plate body; 11-through opening; 12-cutting slit; 13-stop block; 14-slot. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0023] like Figure 1As shown, the utility model provides a wellhead fall prevention device, including a cover plate body 1, the cover plate body 1 is used to cover the wellhead, a penetration opening 11 is opened on the cover plate body 1, and the penetration opening 11 is used to penetrate a pipe column; a plurality of slits 12 are opened on the cover plate body 1 along the circumference of the penetration opening 11, the slits 12 extend to the penetration opening 11, and an independent blocking block 13 is formed between two adjacent slits 12 along the circumferential direction, and the blocking block 13 can be elastically bent along the axial direction of the pipe column to abut against the pipe column; a blocking slit 14 is opened on the edge of the cover plate body 1, and the blocking slit 14 extends to the penetration opening 11, and the cover plate bodies 1 on both sides of the blocking slit 14 can move away from each other to avoid the pipe column. In this embodiment, the cover plate body 1 is used to cover the wellhead. Since the cover plate body 1 is provided with a penetration opening 11 for passing a pipe string, the cover plate body 1 can allow the pipe string to pass normally and go down into the well while covering the wellhead, thereby preventing construction tools and debris of wellhead accessories from falling into the well and affecting downhole construction. Since the cover plate body 1 is provided with a plurality of slits 12 extending to the penetration opening 11 along the circumference of the penetration opening 11, independent stop blocks 13 are formed between two adjacent slits 12, and the stop blocks 13 can be elastically bent along the axial direction of the pipe string to abut against the pipe string. Therefore, when pipe strings of different diameters are inserted into the penetration opening, 11, the blocking block 13 can always press against the outer wall of the pipe string by elastic deformation, so that the wellhead anti-falling device can be suitable for pipe strings of different diameters, thereby improving the application range of the pipe string; since a slot 14 is also provided at the edge of the cover plate body 1, the slot 14 extends to the penetration opening 11, and the cover plate bodies 1 on both sides of the slot 14 can move away from each other to avoid the pipe string, the wellhead anti-falling device can be quickly removed from the pipe string by separating the cover plate bodies 1 on both sides of the slot 14, thereby avoiding friction between the pipe string and the cover plate body 1 when lowering, thereby affecting the lowering of the pipe string or damaging the pipe string, and the operation is simple and quick. Specifically, the insertion opening 11 is circular and matches the outer diameter of the pipe string. A slit 12 is provided around the insertion opening 11, and the slit 12 extends radially outwardly along the insertion opening 11. Therefore, a ring-shaped and foldable surrounding structure is formed on the cover plate body 1 on the outer periphery of the insertion opening 11. When a pipe string with a large diameter is inserted, the blocking block 13 can form an escape space by bending up and down, and the blocking block 13 can elastically abut against the pipe string. Therefore, the wellhead anti-fall device can be suitable for pipe strings with different diameters. At the same time, the blocking blocks 13 can always be tightly attached to each other along the circumferential direction to prevent objects from falling into the well.

[0024] Furthermore, the wellhead anti-fall device also includes a connecting structure, which is arranged on the cover body 1, and is used to connect the cover body 1 on both sides of the slot 14. In this embodiment, the cover body 1 is provided with a connecting structure, which can connect the cover body 1 on both sides of the slot 14, so that the wellhead anti-fall device is firmly fixed on the middle pipe column, and the cover body 1 is prevented from being disturbed by external forces and being disengaged from the pipe column through the slot 14, thereby improving the practicality of the wellhead anti-fall device.

[0025] Specifically, the connection structure includes an adhesive velvet surface and an adhesive hook surface arranged on the cover body 1 on both sides of the card seam 14, and the adhesive velvet surface and the adhesive hook surface can be bonded. In this embodiment, the connection structure is a Velcro, including an adhesive velvet surface and an adhesive hook surface fixed on the cover body 1 on both sides of the card seam 14. After the two sides are overlapped up and down, the adhesive velvet surface and the adhesive hook surface can be bonded by pressing. The structure is simple, convenient and practical. In another embodiment, one end of the connection structure is arranged on the cover body 1 on one side of the card seam 14, and the other end of the connection structure can be detachably inserted into the cover body 1 on the other side of the card seam 14. Specifically, the connection structure is a U-shaped nail, one end of which is fixed on the cover body 1 on one side of the card seam 14, and a through hole is opened on the cover body 1 on the other side of the card seam 14. The other end of the connection structure can be inserted into the through hole, so as to connect the cover bodies 1 on both sides of the card seam 14.

[0026] Furthermore, if Figure 1 As shown, the slot 14 extends radially along the penetration opening 11. The slot 14 extends radially along the penetration opening 11 to the outer edge of the cover body 1, so that the staff can remove the cover body 1 from the pipe column along a straight line, which is time-saving, labor-saving, convenient and fast.

[0027] Furthermore, the cover body 1 is made of rubber. In this embodiment, the cover body 1 is made of rubber; it is understandable that the cover body 1 can also be made of PVC or other materials with both strength and elasticity requirements, as long as it can meet the requirements of covering the pipe column and bearing the falling objects, and the material of the cover body 1 is not specifically limited here.

[0028] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Wellhead anti-fall device, characterized in that: include: A cover plate body (1), the cover plate body (1) being used to cover a wellhead, the cover plate body (1) being provided with a penetration opening (11), the penetration opening (11) being used to penetrate a pipe column; The cover plate body (1) is provided with a plurality of slits (12) along the circumference of the penetration opening (11), the slits (12) extending to the penetration opening (11), and an independent stopper (13) is formed between two adjacent slits (12) along the circumference, and the stopper (13) can be elastically bent along the axial direction of the pipe column to abut against the pipe column; A slot (14) is provided on the edge of the cover plate body (1), the slot (14) extending to the penetration opening (11), and the cover plate bodies (1) on both sides of the slot (14) can be moved away from each other to avoid the pipe column.

2. The wellhead anti-fall device according to claim 1, characterized in that: The wellhead anti-fall device also includes a connection structure, which is arranged on the cover plate body (1) and is used to connect the cover plate body (1) at both sides of the clamping seam (14).

3. The wellhead anti-fall device according to claim 2, characterized in that: The connection structure comprises an adhesive velvet surface and an adhesive hook surface arranged on the cover plate body (1) at both sides of the clamping seam (14), and the adhesive velvet surface and the adhesive hook surface are capable of bonding.

4. The wellhead anti-fall device according to claim 2, characterized in that: One end of the connection structure is arranged on the cover plate body (1) on one side of the slot (14), and the other end of the connection structure can be detachably passed through the cover plate body (1) on the other side of the slot (14).

5. The wellhead anti-fall device according to claim 1, characterized in that: The clamping slot (14) extends along the radial direction of the penetration opening (11).

6. The wellhead anti-fall device according to any one of claims 1 to 5, characterized in that: The cover plate body (1) is made of rubber.

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