Casing head assembly and oil production wellhead device

Abstract

A casing head assembly and an oil wellhead device. The present invention relates to the technical field of casing heads, comprising: a fixing rod is provided on the surface of the casing head, a fixing ring is sleeved on the surface of the fixing rod, and a positioning rod is provided on the surface of the casing head; a supporting rod is slidably connected to the surface of the positioning rod, one end of the positioning rod is inserted into the surface of the fixing ring, and a collar is sleeved on the surface of the supporting rod, and a wrapping plate is hinged on the surface of the collar; the beneficial effect is: after the external pipe is connected to the fixing rod, the mounting hole on its surface is aligned with the limiting groove, the supporting rod can be pulled to drive the limiting rod to be inserted into the surface of the limiting groove, and the external pipe can be further fixed, so that the connection between the fixing rod and the external pipe is more stable; then the wrapping plate is moved along the supporting rod until the wrapping plate is buckled at the bottom of the fixing ring. Under the action of the rubber belt, one end of the wrapping plate will not easily detach from the bottom of the fixing ring. One end of the wrapping plate is buckled at the bottom of the fixing ring, so that one end of the limiting rod will not easily detach from the limiting groove.

Description

Technical Field

[0001] The present invention relates to the field of casing heads, in particular to a casing head assembly and an oil production wellhead device. Background Art

[0002] Casing heads are commonly used in the process of oil and natural gas extraction. They are installed at the upper end of the surface casing string. They are used to fix the wellhead of the drilled well, connect the wellhead casing string, and support the connection components of the technical casing and the oil layer casing. They can be used to seal the annular space between the layers of pipes and provide a transition connection for the installation of blowout preventers, tubing heads, and Christmas trees. In addition, 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] In the prior art, a casing head is provided on an oil wellhead device to enable the installation of subsequent equipment. CN212898350U discloses a quick-install casing head for an oil wellhead. This patent can meet the requirements for the installation of subsequent equipment. The patent also points out that the fixing rod on the surface of the casing head is connected and fixed to the external pipeline by bolts.

[0004] However, connecting and fixing by turning the bolts takes a long time, and the bolts are prone to loosening after long-term use. Summary of the Invention

[0005] The object of the present invention is to provide a casing head assembly and an oil production wellhead device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a casing head, a fixing rod is provided on the surface of the casing head, a fixing ring is sleeved on the surface of the fixing rod, and a positioning rod is provided on the surface of the casing head;

[0007] The supporting rod is slidably connected to the surface of the positioning rod. One end of the positioning rod is plugged into the surface of the fixing ring. The surface of the supporting rod is sleeved with a collar. The surface of the collar is hinged with a wrapping plate.

[0008] Preferably, a movable groove is provided on the surface of the fixed rod, and the movable groove has a square groove structure. There are two groups of movable grooves, which are symmetrically distributed about the center of the fixed rod, and the fixed ring is slidably connected to the surface of the movable groove.

[0009] Preferably, a rotating groove is provided on the surface of the sleeve head, and the rotating groove is an annular groove structure. The surface of the rotating groove is rotatably connected to a rotating block, and the rotating block is an annular plate structure. A movable groove is provided on the surface of the rotating block, and a clamping block is integrally formed on the surface of the positioning rod, and the clamping block is rotatably connected to the surface of the movable groove.

[0010] Preferably, the positioning rod and the supporting rod are both T-shaped column structures, a spring is provided between the supporting rod and the surface of the positioning rod, and there are two groups of positioning rods, which are symmetrically distributed about the center of the rotating block.

[0011] Preferably, a limiting rod is provided on the surface of the supporting rod, and a limiting groove is provided on the surface of the fixing ring. There are multiple groups of limiting grooves, and the multiple groups of limiting grooves are distributed in a circular array about the center of the fixing ring, and one end of the limiting rod is inserted into the limiting groove.

[0012] Preferably, the wrapping plate is an arc-shaped plate structure, and the surface of the wrapping plate is provided with an arc-shaped plate structure with a triangular cross-section, and the wrapping plate is in contact with the bottom surface of the fixing ring.

[0013] An oil production wellhead device comprises the casing head assembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The sleeve head assembly proposed by the present invention, after the external pipe is connected to the fixing rod, the mounting hole on its surface is aligned with the limit groove, and the supporting rod can be pulled to drive the limit rod to be inserted into the surface of the limit groove, so that the external pipe can be further fixed, making the connection between the fixing rod and the external pipe more stable; then the wrapping plate is moved along the supporting rod until the wrapping plate is buckled at the bottom of the fixing ring. Under the action of the rubber belt, one end of the wrapping plate will not easily detach from the bottom of the fixing ring, and one end of the wrapping plate is buckled at the bottom of the fixing ring, so that one end of the limit rod will not easily detach from the limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the connection structure between the casing head and the fixing rod of the present invention;

[0018] Figure 3 This is a schematic diagram of the wrapping plate structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection structure between the positioning rod and the wrapping plate of the present invention.

[0020] In the figure: casing head 1; fixed rod 2; movable groove 3; fixed ring 4; limiting groove 5; rotating groove 6; rotating block 7; positioning rod 8; clamping block 9; movable groove 10; supporting rod 11; limiting rod 12; collar 13; wrapping plate 14; rubber belt 15. DETAILED DESCRIPTION

[0021] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-Figure 4 The present invention provides a technical solution: a casing head 1, a fixing rod 2 is provided on the surface of the casing head 1, a fixing ring 4 is sleeved on the surface of the fixing rod 2, and a positioning rod 8 is provided on the surface of the casing head 1; a supporting rod 11 is slidably connected to the surface of the positioning rod 8, one end of the positioning rod 8 is inserted into the surface of the fixing ring 4, and a collar 13 is sleeved on the surface of the collar 13, and a wrapping plate 14 is hinged on the surface of the collar 13;

[0024] After the external pipe is connected to the fixing rod 2, the mounting hole on its surface is aligned with the limiting groove 5, and the supporting rod 11 can be pulled to drive the limiting rod 12 to be inserted into the surface of the limiting groove 5, so that the external pipe can be further fixed, making the connection between the fixing rod 2 and the external pipe more stable; then the wrapping plate 14 is moved along the supporting rod 11 until the wrapping plate 14 is buckled at the bottom of the fixing ring 4. Under the action of the rubber belt 15, one end of the wrapping plate 14 will not easily detach from the bottom of the fixing ring 4. One end of the wrapping plate 14 is buckled at the bottom of the fixing ring 4, so one end of the limiting rod 12 will not easily detach from the limiting groove 5.

[0025] Example 2

[0026] On the basis of embodiment 1, in order to make it easier to connect the casing head 1 as a whole with the external pipe, a movable groove 3 is opened on the surface of the fixed rod 2, and the movable groove 3 is a square groove structure. There are two groups of movable grooves 3, and the two groups of movable grooves 3 are symmetrically distributed about the center of the fixed rod 2. The fixed ring 4 is slidably connected to the surface of the movable groove 3. The surface of the casing head 1 is provided with a rotating groove 6, and the rotating groove 6 is an annular groove structure. The surface of the rotating groove 6 is rotatably connected with a rotating block 7, and the rotating block 7 is an annular plate structure. The surface of the rotating block 7 is opened. The movable groove 10 is formed with a card block 9 on the surface of the positioning rod 8. The card block 9 is rotatably connected to the surface of the movable groove 10. The positioning rod 8 and the top holding rod 11 are both "T"-shaped column structures. A spring is provided between the top holding rod 11 and the surface of the positioning rod 8. The positioning rod 8 is provided with two groups. The two groups of positioning rods 8 are symmetrically distributed about the center of the rotating block 7. The surface of the top holding rod 11 is provided with a limiting rod 12. The surface of the fixed ring 4 is provided with a limiting groove 5. The limiting groove 5 is provided with multiple groups. The multiple groups of limiting grooves 5 are arranged in a circular array about the center of the fixed ring 4. The outer pipe is connected to the fixing rod 2, and the outer pipe is in contact with the surface of the fixing ring 4. The outer pipe is connected to the fixing rod 2 in a flush manner without tilting. After the outer pipe is connected to the fixing rod 2, the mounting hole on its surface is aligned with the limiting groove 5. At this time, The supporting rod 11 can be pulled to drive the limiting rod 12 to be inserted into the surface of the limiting groove 5, so as to further fix the external pipe, making the connection between the fixing rod 2 and the external pipe more stable; then the wrapping plate 14 is moved along the supporting rod 11 until the wrapping plate 14 is buckled on the bottom of the fixing ring 4. Under the action of the rubber belt 15, one end of the wrapping plate 14 will not easily detach from the bottom of the fixing ring 4. One end of the wrapping plate 14 is buckled on the bottom of the fixing ring 4, so one end of the limiting rod 12 will not easily detach from the limiting groove 5.

[0027] An oil production wellhead device comprises the casing head assembly.

[0028] In actual use, when the external pipe is connected to the fixing rod 2, the external pipe contacts the surface of the fixing ring 4, and can ensure that the external pipe is connected to the fixing rod 2 flush without tilting. After the external pipe is connected to the fixing rod 2, the mounting hole on its surface is aligned with the limiting groove 5. At this time, the supporting rod 11 can be pulled to drive the limiting rod 12 to be inserted into the surface of the limiting groove 5, so that the external pipe can be further fixed, making the connection between the fixing rod 2 and the external pipe more stable; then the wrapping plate 14 is moved along the supporting rod 11 until the wrapping plate 14 is buckled at the bottom of the fixing ring 4. Under the action of the rubber belt 15, one end of the wrapping plate 14 will not easily detach from the bottom of the fixing ring 4. One end of the wrapping plate 14 is buckled at the bottom of the fixing ring 4, so one end of the limiting rod 12 will not easily detach from the limiting groove 5.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A casing head assembly, characterized in that: The casing head assembly comprises: A casing head (1), wherein a fixing rod (2) is provided on the surface of the casing head (1), a fixing ring (4) is sleeved on the surface of the fixing rod (2), and a positioning rod (8) is provided on the surface of the casing head (1); The supporting rod (11) is slidably connected to the surface of the positioning rod (8), one end of the positioning rod (8) is inserted into the surface of the fixing ring (4), and the surface of the supporting rod (11) is provided with a sleeve (13), and the surface of the sleeve (13) is hinged with a wrapping plate (14); the surface of the fixing rod (2) is provided with a movable groove (3), the movable groove (3) is a square groove structure, and the movable groove (3) is provided with two groups, and the two groups of movable grooves (3) are symmetrically distributed about the center of the fixing rod (2), and the fixing ring (4) is slidably connected to the surface of the movable groove (3); the surface of the sleeve head (1) is provided with a rotating groove (6), the rotating groove (6) is an annular groove structure, and the surface of the rotating groove (6) is rotatably connected to a rotating block (7), and the rotating block (7) is an annular plate structure. The surface of the movable block (7) is provided with a movable groove 2 (10), and the surface of the positioning rod (8) is integrally formed with a clamping block (9), and the clamping block (9) is rotatably connected to the surface of the movable groove 2 (10); the positioning rod (8) and the supporting rod (11) are both "T"-shaped column structures, a spring is provided between the supporting rod (11) and the surface of the positioning rod (8), and the positioning rod (8) is provided with two groups, and the two groups of positioning rods (8) are symmetrically distributed about the center of the rotating block (7); the surface of the supporting rod (11) is provided with a limiting rod (12), and the surface of the fixed ring (4) is provided with a limiting groove (5), and the limiting groove (5) is provided with multiple groups, and the multiple groups of limiting grooves (5) are distributed in a circular array about the center of the fixed ring (4), and one end of the limiting rod (12) is inserted into the limiting groove (5).

2. The casing head assembly according to claim 1, characterized in that: The wrapping plate (14) is an arc-shaped plate-like structure, and the surface of the wrapping plate (14) is provided with an arc-shaped plate-like structure with a triangular cross-section, and the wrapping plate (14) is in contact with the bottom surface of the fixing ring (4).

3. An oil production wellhead device, characterized in that: The casing head assembly comprises the casing head assembly according to any one of claims 1 to 2.

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