Oil extraction wellhead casing head

Abstract

The utility model provides an oil production wellhead casing head which comprises a casing head body, a supporting pipe is fixedly connected to the inner wall of the casing head body, a hanger is arranged in the casing head body and comprises a barrel and a mounting disc fixedly connected to the top of the barrel, and arc-shaped openings distributed symmetrically are formed in the barrel; arc-shaped guide strips which are symmetrically distributed are fixedly connected to the inner wall of the supporting pipe, the arc-shaped guide strips are located in the arc-shaped opening, first mounting insertion holes which are symmetrically distributed are formed in the casing head body, second mounting insertion holes which are symmetrically distributed are formed in the mounting disc, and insertion blocks are jointly inserted into the first mounting insertion holes and the second mounting insertion holes; one end of the inserting block is fixedly connected with a connecting block, and the outer wall of the casing head body is fixedly connected with four positioning blocks; the hanger is installed and fixed in an inserting and matching mode, time and labor are saved in the installation process, operation is convenient and fast, the overall labor intensity is small, and the installation efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casing heads, in particular to a casing head for an oil production wellhead. Background Art

[0002] The casing head is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of the technical casing and the oil layer casing, seal the annular space between the layers of pipes, provide a transition connection for the installation of the blowout preventer, tubing head, and Christmas tree, and through the two side ports on the casing head body, operations such as squeezing mud, monitoring and adding balancing fluid can be carried out.

[0003] After searching, the Chinese patent with the publication number of "CN219711482U discloses a casing head, including a casing head body that is connected from top to bottom, and a hanger connected to the casing head body. An inner tube is fixed in the casing head body, and the upper end of the inner tube is located below the top opening of the casing head body. A clamping rod is fixed on the side wall of the upper part of the inner tube. The hanger includes a cylinder, a positioning plate fixed on the cylinder, and a plurality of upper screw holes are opened on the upper surface of the positioning plate. An inclined slide groove and a clamping groove connected to the slide groove are provided on the side wall of the cylinder. The clamping rod is slidably connected in the slide groove, and the clamping rod can be clamped in the clamping groove by rotating the hanger. The outer wall of the cylinder is provided with an external thread, and the inner wall of the inner tube is provided with an internal thread. When the clamping rod is clamped in the clamping groove, the hanger is threadedly connected to the inner tube, and the positioning plate is against the top of the inner tube. The utility model can make the installation of the hanger and the casing head body more stable", but the prior art has the following shortcomings when used:

[0004] The tool is inserted into the upper screw hole of the positioning plate, and the hanger is screwed to rotate the slide groove along the clamping rod until the clamping rod is clamped in the clamping groove. At this time, due to the rotation of the hanger, the hanger and the inner tube are threadedly connected. This method not only requires the use of corresponding tools, but also requires multiple operators to rotate together, which is labor-intensive, time-consuming and labor-intensive, and has low installation efficiency.

[0005] Therefore, a kind of oil production wellhead casing head is needed badly to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to solve the problems that the current method involves inserting a tool into the upper screw hole of a positioning plate, screwing the hanger, and rotating the slide groove along the clamping rod until the clamping rod is clamped in the clamping groove. At this time, due to the rotation of the hanger, the hanger and the inner tube are threadedly connected. This method not only requires the use of corresponding tools, but also requires multiple operators to rotate together, which has high labor intensity, is time-consuming and labor-intensive, and has low installation efficiency.

[0007] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0008] The invention discloses an oil well casing head to improve the above problems.

[0009] The specific application is as follows:

[0010] A casing head for an oil wellhead comprises a casing head body, an inner wall of the casing head body is fixedly connected to a support tube, a hanger is arranged in the casing head body, the hanger comprises a cylinder and a mounting plate fixedly connected to the top of the cylinder body, the outer wall of the cylinder is provided with a symmetrically distributed arc opening, the inner wall of the support tube is fixedly connected to a symmetrically distributed arc guide strip, the arc guide strip is located in the arc opening, the casing head body is provided with a symmetrically distributed first mounting socket, the mounting plate is provided with a symmetrically distributed second mounting socket, an insert block is inserted in the first mounting socket and the second mounting socket, one end of the insert block is fixedly connected to a connecting block, four positioning blocks are fixedly connected to the outer wall of the casing head body, the connecting block is provided with symmetrically distributed positioning openings, the positioning block is placed in the positioning opening, and the connecting block is fixed to two positioning blocks by positioning bolts.

[0011] As a preferred technical solution of the present application, a connecting pipe is connected to the casing head body, and a gate valve and a pressure detection gauge are provided on the connecting pipe.

[0012] As a preferred technical solution of the present application, a plurality of evenly arranged threaded holes are provided on the top of the mounting plate.

[0013] As a preferred technical solution of the present application, a support frame is provided on the casing head body.

[0014] As a preferred technical solution of the present application, the bottom of the mounting plate fits with the top of the support tube.

[0015] As a preferred technical solution of the present application, the connecting block is in contact with the outer wall of the casing head body.

[0016] As a preferred technical solution of the present application, the positioning block is adapted to the positioning opening.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the scheme of this application:

[0019] By setting the first mounting socket, the second mounting socket, the plug block, the connecting block, the positioning block, the positioning opening, the positioning bolt, the arc opening and the arc guide strip, when the hanger needs to be installed, the two arc openings on the cylinder body are aligned with the two arc guide strips on the inner wall of the support tube, and the hanger is slid downward by its own weight, and the two arc guide strips are respectively placed in the two arc openings, and the bottom of the mounting plate is finally fitted with the top of the support tube to preliminarily position the hanger. At this time, the two first mounting sockets are respectively connected with the two second mounting sockets, and the two plug blocks are respectively inserted into the two first mounting sockets through the two connecting blocks. When the connecting block fits with the outer wall of the casing head body, the ends of the two plug blocks are respectively Insert the two second installation holes, and the two positioning blocks are placed in the two positioning openings at this time. The connecting block is fixed by two positioning bolts so that the position of the insert block will not be offset, thereby ensuring the fixing effect of the hanger. The installation process saves time and effort, has low labor intensity, and improves installation efficiency. It solves the problem of inserting a tool into the upper screw hole of the positioning plate in the prior art, screwing the hanger, and rotating the slide groove along the clamping rod until the clamping rod is clamped in the clamping groove. At this time, due to the rotation of the hanger, the hanger is threadedly connected to the inner tube. This method not only requires the use of corresponding tools, but also requires multiple operators to rotate together to achieve it, which has high labor intensity, is time-consuming and labor-intensive, and has low installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front view structure of an oil wellhead casing head provided in this application.

[0021] Figure 2 A schematic diagram of the overall structure of an oil wellhead casing head provided in this application.

[0022] Figure 3 A schematic diagram of the cross-sectional structure of an oil wellhead casing head provided in this application.

[0023] Figure 4 A schematic diagram of the explosion structure of an oil wellhead casing head provided in this application.

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A.

[0025] Indicated in the figure:

[0026] 1. Casing head body; 2. Support pipe; 3. Hanger; 4. Cylinder; 5. Mounting plate; 6. First mounting socket; 7. Second mounting socket; 8. Insert block; 9. Connecting block; 10. Positioning block; 11. Positioning opening; 12. Positioning bolt; 13. Connecting pipe; 14. Gate valve; 15. Pressure gauge; 16. Threaded hole; 17. Support frame; 18. Arc opening; 19. Arc guide strip. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0028] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Example

[0032] like Figure 1-5As shown, an oil wellhead casing head proposed in this embodiment includes a casing head body 1, a support tube 2 is fixedly connected to the inner wall of the casing head body 1, a hanger 3 is arranged in the casing head body 1, the hanger 3 includes a barrel 4 and a mounting plate 5 fixedly connected to the top of the barrel 4, the outer wall of the barrel 4 is provided with symmetrically distributed arc openings 18, the inner wall of the support tube 2 is fixedly connected with symmetrically distributed arc guide strips 19, the two arc openings 18 on the barrel 4 are aligned with the two arc guide strips 19 on the inner wall of the support tube 2, and the hanger 3 slides downward by its own weight, and the arc guide strips 19 are located in the arc openings 18, the casing head body 1 is provided with symmetrically distributed first mounting sockets 6, and finally the bottom of the mounting plate 5 is fitted with the top of the support tube 2 to preliminarily position the hanger 3, and the mounting plate 5 is provided with symmetrically distributed second mounting sockets 7, An insert block 8 is inserted into the first mounting socket 6 and the second mounting socket 7. One end of the insert block 8 is fixedly connected to a connecting block 9. The two insert blocks 8 are respectively inserted into the two first mounting sockets 6 through the two connecting blocks 9. When the connecting block 9 fits against the outer wall of the casing head body 1, the ends of the two insert blocks 8 are respectively inserted into the two second mounting sockets 7. Four positioning blocks 10 are fixedly connected to the outer wall of the casing head body 1. The connecting block 9 is provided with symmetrically distributed positioning openings 11. The positioning blocks 10 are placed in the positioning openings 11. The connecting block 9 is fixed to the two positioning blocks 10 by positioning bolts 12. The connecting block 9 is fixed by two positioning bolts 12. The position of the insert block 8 will not be offset, thereby ensuring the fixing effect of the hanger 3. The installation process saves time and effort, has low labor intensity, improves installation efficiency, and is more convenient to operate.

[0033] like Figure 1 As shown, the casing head body 1 is connected with a connecting pipe 13 , and the connecting pipe 13 is provided with a gate valve 14 and a pressure detection gauge 15 , and the pressure detection gauge 15 can detect the pressure in the connecting pipe 13 .

[0034] like Figure 2 As shown, a plurality of evenly arranged threaded holes 16 are provided on the top of the mounting plate 5 , and the threaded holes 16 of the mounting plate 5 can be mounted with external pipes.

[0035] like Figure 1 As shown, a support frame 17 is provided on the casing head body 1 to support the casing head body 1 .

[0036] like Figure 3 As shown, the bottom of the mounting plate 5 fits with the top of the support tube 2 , and at this time, the two first mounting holes 6 are connected with the two second mounting holes 7 respectively.

[0037] like Figure 2 and Figure 5 As shown, the connection block 9 is fitted with the outer wall of the casing head body 1 , and the ends of the two inserting blocks 8 are respectively inserted into the two second installation inserting holes 7 .

[0038] like Figure 2 and Figure 5 As shown, the positioning block 10 is matched with the positioning opening 11 .

[0039] Specifically, when the casing head for an oil wellhead is used: when the hanger 3 needs to be installed, the two arc-shaped openings 18 on the barrel 4 are aligned with the two arc-shaped guide strips 19 on the inner wall of the support tube 2, and the hanger 3 slides downward by its own weight. The two arc-shaped guide strips 19 are respectively placed in the two arc-shaped openings 18, and the bottom of the installation plate 5 finally fits with the top of the support tube 2, and the hanger 3 is initially positioned. At this time, the two first installation sockets 6 are respectively connected to the two second installation sockets 7, and the two plug blocks 8 are respectively inserted into the two first installation sockets 6 through the two connecting blocks 9. When the connecting block 9 fits with the outer wall of the casing head body 1, the ends of the two plug blocks 8 are respectively inserted into the two second mounting holes 7, and the two positioning blocks 10 are placed in the two positioning openings 11 at this time. The connecting block 9 is fixed by screwing the two positioning bolts 12 so that their threads penetrate the connecting block 9 and the positioning block 10, so that the ends of the two plug blocks 8 can be stably inserted into the two second mounting holes 7, and the position of the plug blocks 8 will not be offset, thereby ensuring the fixing effect of the hanger 3, the installation process saves time and effort, has low labor intensity, improves installation efficiency, and is more convenient to operate.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. An oil well casing head, comprising a casing head body (1), characterized in that: The inner wall of the casing head body (1) is fixedly connected to a support tube (2); a hanger (3) is arranged inside the casing head body (1); the hanger (3) comprises a cylinder (4) and a mounting plate (5) fixedly connected to the top of the cylinder (4); the outer wall of the cylinder (4) is provided with symmetrically distributed arc-shaped openings (18); the inner wall of the support tube (2) is fixedly connected to symmetrically distributed arc-shaped guide strips (19); the arc-shaped guide strips (19) are located in the arc-shaped openings (18); the casing head body (1) is provided with symmetrically distributed first mounting sockets (6); the The mounting plate (5) is provided with symmetrically distributed second mounting sockets (7), an insert block (8) is inserted into both the first mounting socket (6) and the second mounting socket (7), one end of the insert block (8) is fixedly connected to a connecting block (9), four positioning blocks (10) are fixedly connected to the outer wall of the casing head body (1), the connecting block (9) is provided with symmetrically distributed positioning openings (11), the positioning blocks (10) are placed in the positioning openings (11), and the connecting block (9) is fixed to the two positioning blocks (10) by means of positioning bolts (12).

2. The oil wellhead casing head according to claim 1, characterized in that: The casing head body (1) is connected to a connecting pipe (13), and the connecting pipe (13) is provided with a gate valve (14) and a pressure detection gauge (15).

3. The oil wellhead casing head according to claim 1, characterized in that: The top of the mounting plate (5) is provided with a plurality of evenly arranged threaded holes (16).

4. The oil wellhead casing head according to claim 1, characterized in that: A support frame (17) is provided on the casing head body (1).

5. The oil wellhead casing head according to claim 1, characterized in that: The bottom of the mounting plate (5) fits the top of the support tube (2).

6. The oil wellhead casing head according to claim 1, characterized in that: The connecting block (9) is in contact with the outer wall of the casing head body (1).

7. The oil wellhead casing head according to claim 1, characterized in that: The positioning block (10) is matched with the positioning opening (11).

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