Casing head protection device

Abstract

The utility model relates to the field of oil and gas production and transportation, in particular to a casing head protection device which comprises a barrel, a casing joint and an annular limiting piece, and a first fixing ring is arranged at the end of the barrel. The sleeve joint is provided with a threaded connection part and a second fixing ring, and the threaded connection part is used for being connected with a sleeve head; the first fixing ring and the second fixing ring are oppositely arranged, the annular limiting piece is arranged on the first fixing ring in a clamped mode, the annular limiting piece is arranged on the second fixing ring in a clamped mode, the annular limiting piece is detachably connected with the first fixing ring, and the annular limiting piece is detachably connected with the second fixing ring; according to the casing head protection device, the cylinder body is detachably connected with the casing joint, the casing joint is connected with the casing head after being detached from the cylinder body, then the first fixing ring and the second fixing ring are connected through the annular limiting piece, the casing joint is rapidly installed on and detached from the cylinder body, and therefore rapid installation and detachment of the casing head and the casing head protection device are achieved. And the maintenance and replacement efficiency of the casing head is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas production and transportation field, especially a casing head protection device. BACKGROUND

[0002] At present, the connecting mode of casing head protection mechanism and casing head is flange connection, which needs relatively fine operation process during installation; when the casing head is connected by flange, the flanges of protection mechanism and casing head need to be accurately aligned, and after the connecting bolt is inserted, the bolt is gradually tightened according to the specified torque value and using diagonal tightening mode, so as to ensure the uniformity and sealing performance of the connection between casing head and protection mechanism.

[0003] However, during the connection between casing head and protection mechanism, appropriate torque wrench must be used, and the torque size must be strictly controlled to prevent the bolt from being damaged due to excessive torque or the connection from being not firm due to small torque, which is relatively complicated to operate, consumes more time and is difficult to realize quick connection; especially when the casing head protection mechanism needs to be repaired or replaced due to long-term use, since it cannot be quickly disassembled, a large amount of time is wasted for disassembling and assembling the casing head, which affects the oil and gas production efficiency. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the deficiency that the casing head and casing head protection mechanism cannot be quickly installed and disassembled in the prior art, and provides a casing head protection device.

[0005] The utility model provides a casing head protection device, which comprises:

[0006] A cylinder body is provided with a first fixing ring at the end portion;

[0007] A casing joint is provided with a threaded connection part and a second fixing ring, and the threaded connection part is used for connecting with the casing head;

[0008] An annular limiting piece is oppositely arranged with the first fixing ring and the second fixing ring, the annular limiting piece is clamped and arranged on the first fixing ring, the annular limiting piece is clamped and arranged on the second fixing ring, the annular limiting piece is detachably connected with the first fixing ring, and the annular limiting piece is detachably connected with the second fixing ring.

[0009] The utility model discloses a casing head protection device, sets up the first fixed ring at the end portion of the cylinder, sets up the second fixed ring on the casing joint, and first fixed ring and second fixed ring are detachably connected with annular limiting piece respectively, and the casing joint is convenient to install and dismount from the cylinder, and first fixed ring and second fixed ring are oppositely arranged, and it is convenient for oil gas to enter the cylinder from the casing head, and annular limiting piece is clamped and fixed on first fixed ring and second fixed ring through the mode of encircling, and first fixed ring and second fixed ring are sealed between, avoid leakage, when the casing head protection device is used, first loosen annular limiting piece, make the cylinder separate with the casing joint, after the threaded connection part of the casing joint is connected or dismounted with the casing head, through annular limiting piece, clamps and fixes first fixed ring and second fixed ring respectively, makes the casing joint fixed on the cylinder, and through the detachable connection of casing joint and cylinder, the casing head and protection device can be connected or dismounted quickly.

[0010] The casing head protection device of the utility model, the casing joint and the casing head adopt the mode of thread connection to be connected.

[0011] Preferably, the annular limiting piece comprises a first clamping member and a second clamping member, the first clamping member and the second clamping member are detachably connected, the first clamping member is provided with a first arc-shaped groove, the second clamping member is provided with a second arc-shaped groove, the first arc-shaped groove and the second arc-shaped groove are butt-jointed to form an annular groove, the first fixed ring is clamped in the annular groove, and the second fixed ring is clamped in the annular groove.

[0012] When the first clamping member and the second clamping member are separated, the casing joint can be removed from the cylinder, and when the first clamping member and the second clamping member are connected, the first fixed ring and the second fixed ring are both limited in the annular groove, so that the casing joint is fixed on the cylinder.

[0013] Preferably, the first clamping member and the second clamping member abut, and the annular limiting piece further comprises a hoop, and the hoop is clamped and arranged on the first clamping member and the second clamping member.

[0014] By arranging the hoop, the first clamping member and the second clamping member can be quickly separated after the hoop is loosened, the hoop can apply force to the first clamping member and the second clamping member, the first clamping member and the second clamping member are tightly abutted, so that the first fixed ring and the second fixed ring are connected together by the annular limiting piece.

[0015] Preferably, the hoop comprises a first arc-shaped member and a second arc-shaped member, and the first arc-shaped member and the second arc-shaped member are detachably connected.

[0016] The first arc-shaped piece and the second arc-shaped piece are detachably connected, so that the hoop ring can be quickly fixed or detached on the first clamping piece and the second clamping piece.

[0017] Preferably, the hoop ring further comprises a connecting block, one end of the connecting block is hingedly connected with the first arc-shaped piece, and the other end of the connecting block is hingedly connected with the second arc-shaped piece; the first arc-shaped piece is provided with a buckle piece at an end away from the connecting block, the second arc-shaped piece is provided with a buckle part at an end away from the connecting block, and the buckle piece is connected with the buckle part.

[0018] The first arc-shaped piece and the second arc-shaped piece are respectively hingedly connected to the connecting block, and after the buckle piece is connected with the buckle part, the shape of the hoop ring is adapted to the shape of the annular limiting piece, so that the hoop ring clamps and fastens the annular limiting piece.

[0019] Preferably, the first clamping piece is provided with a sealing piece, and the second clamping piece abuts against the sealing piece.

[0020] The sealing piece is arranged on the first clamping piece, and after the first clamping piece and the second clamping piece are connected, the second clamping piece abuts against the sealing piece, so that the first clamping piece and the second clamping piece are sealed, and leakage is avoided. The sealing piece is a rubber structure.

[0021] Preferably, the first fixed ring is provided with a spring assembly, and the spring assembly abuts against the second fixed ring.

[0022] The spring assembly pushes the first fixed ring and the second fixed ring, so that the first fixed ring is in close contact with the groove wall of the annular groove, and the second fixed ring is in close contact with the groove wall of the annular groove, thereby avoiding oil and gas leakage. The spring assembly has a gap between the first fixed ring and the second fixed ring, so as to facilitate installation and detachment of the second fixed ring.

[0023] Preferably, the spring assembly comprises a plurality of spring pieces, the plurality of spring pieces are arranged along the circumference of the first fixed ring and disposed on the first fixed ring, and the spring pieces abut against the second fixed ring.

[0024] The plurality of spring pieces are arranged along the circumference of the first fixed ring, so that the force on the second fixed ring is uniform, and oil and gas leakage is avoided.

[0025] Preferably, the spring piece is provided with a first connecting column, the first connecting column is provided with a first limiting plate and a second limiting plate, the first connecting column is connected with the first fixed ring, the first limiting plate and the second limiting plate are respectively located on opposite sides of the spring piece, the first limiting plate is spaced apart from the spring piece, and the second limiting plate is spaced apart from the spring piece; the second fixed ring is provided with a plurality of second connecting columns, and the second connecting columns are clamped and connected with the spring pieces.

[0026] The spring component mates with the second connecting post located on the second fixed ring to prevent misalignment of the second fixed ring during installation on the cylinder. The second connecting post serves a positioning function and also limits the spring component to prevent excessive displacement after being compressed, ensuring that the second fixed ring can tightly abut against the side wall of the annular groove. The first and second limiting plates can block the spring component from deforming under pressure, preventing it from detaching from the second connecting post after deformation.

[0027] Preferably, the cylinder is provided with a plurality of pipe connectors, which are used to connect pipes.

[0028] Several pipe connectors are installed on the cylinder, and pipes are installed on the pipe connectors to connect the pipes to the inside of the cylinder.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] 1. This utility model provides a casing head protection device, which includes a first fixing ring at the end of the cylinder and a second fixing ring on the casing joint. The first and second fixing rings are detachably connected to an annular limiting member, facilitating the installation and removal of the casing joint from the cylinder. The first and second fixing rings are positioned opposite each other to facilitate the entry of oil and gas from the casing head into the cylinder. The annular limiting member is fixed to the first and second fixing rings by wrapping around them, sealing the space between the first and second fixing rings to prevent leakage. When using the casing head protection device, the annular limiting member is first loosened to separate the cylinder from the casing joint. After connecting or disconnecting the threaded connection of the casing joint from the casing head, the first and second fixing rings are fixed by the annular limiting member, fixing the casing joint to the cylinder. The detachable connection between the casing joint and the cylinder allows for quick connection or disconnection of the casing head and the protection device.

[0031] 2. This utility model provides a sleeve head protection device with a simple structure and convenient use. By detachably connecting the cylinder body and the sleeve joint, the sleeve joint can be disassembled from the cylinder body and connected to the sleeve head. Then, the first fixing ring and the second fixing ring are connected by the annular limiting member, so that the sleeve joint can be quickly installed and removed from the cylinder body. This realizes the rapid installation and removal of the sleeve head and the sleeve head protection device, improves the efficiency of sleeve head maintenance and replacement, and has good economic and practical value. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a sleeve head protection device according to Embodiment 1 of this utility model;

[0033] Figure 2 This is a schematic diagram showing the usage state of the clamping ring of a sleeve head protection device according to Embodiment 1 of this utility model;

[0034] Figure 3 It is the structure schematic view of the hoop ring of the casing head protection device of the embodiment 1 of the utility model;

[0035] Figure 4 It is the structure schematic view of the spring piece of the casing head protection device of the embodiment 1 of the utility model;

[0036] Figure 5 It is the structure schematic view of the annular limiting piece of the casing head protection device of the embodiment 1 of the utility model;

[0037] Figure 6 It is the structure schematic view of the sealing piece of the casing head protection device of the embodiment 1 of the utility model.

[0038] Markings in the drawing:

[0039] 1-cylinder, 2-casing joint, 7-pipeline connecting piece,

[0040] 9-annular groove, 91-first arc-shaped groove, 92-second arc-shaped groove, 93-sealing piece,

[0041] 10-annular limiting piece, 101-first clamping piece, 102-second clamping piece,

[0042] 11-first arc-shaped piece, 12-second arc-shaped piece, 13-third rotating shaft, 14-first limiting plate, 15-connecting block, 16-second limiting plate, 17-fourth rotating shaft, 18-threaded connecting part, 19-second rotating shaft, 20-connecting rod, 21-pull rod, 22-protection core, 23-first rotating shaft, 24-first fixed ring, 25-second connecting column, 26-first connecting column, 27-spring piece, 28-connecting plate, 29-second fixed ring. DETAILED DESCRIPTION

[0043] The utility model will be further described in detail in combination with specific embodiment. But this should not be understood as the range of the above-mentioned subject matter of the utility model is limited to the following embodiments, and the technology realized based on the content of the utility model belongs to the range of the utility model.

[0044] In the description of the embodiments of the present application, the terms of orientation or position relationship such as "upper", "lower", "left", "right", "center", "inner", "outer" and the like are expressed based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / device / apparatus of the present application is usually used. These terms of orientation or position relationship are only for the convenience of describing the present application or simplifying the description of the embodiments, and for the convenience of the skilled person to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present application.

[0045] In addition, the terms "horizontal", "vertical", "overhanging", "parallel" and the like do not mean that the corresponding device / component / element must be absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8% or less, more preferably an error / deviation of ±6% or less, more preferably an error / deviation of ±5% or less, and more preferably an error / deviation of ±4% or less. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present application.

[0046] In addition, the terms "first", "second", "third" and the like in the description of the embodiments of the present application are only used to distinguish the same or similar components, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0047] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. in any case, or even more than 9.

[0048] In addition, in the description of the technical scheme of the present application, unless otherwise specified / limited / limited, the terms "set", "install", "connect", "connect", "set", "lay", "arrange" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing and other commonly used connection means in the art. The connection can be mechanical connection, electrical connection or communication connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the communication between two elements.

[0049] Embodiment 1

[0050] As shown in the drawings, a casing head protection device comprises: Figures 1-6 a barrel 1, an end of the barrel 1 is provided with a first fixing ring 24;

[0051] a casing head 2, the casing head 2 is provided with a threaded connection part 18 and a second fixing ring 29, the threaded connection part 18 is used for connecting with a casing head;

[0052] an annular limiting part 10, the first fixing ring 24 and the second fixing ring 29 are oppositely arranged, the annular limiting part 10 is clamped and arranged on the first fixing ring 24, the annular limiting part 10 is clamped and arranged on the second fixing ring 29, the annular limiting part 10 is detachably connected with the first fixing ring 24, and the annular limiting part 10 is detachably connected with the second fixing ring 29.

[0053] The first fixing ring 24 is arranged at an end of the barrel 1, the second fixing ring 29 is arranged on the casing head 2, the first fixing ring 24 and the second fixing ring 29 are respectively detachably connected with the annular limiting part 10, the casing head 2 is convenient to install and detach from the barrel 1, the first fixing ring 24 and the second fixing ring 29 are oppositely arranged, oil and gas is convenient to enter into the barrel 1 from the casing head, the annular limiting part 10 is clamped and fixed on the first fixing ring 24 and the second fixing ring 29 in a surrounding manner, the first fixing ring 24 and the second fixing ring 29 are sealed, and leakage is avoided, when the casing head protection device is used, first, the annular limiting part 10 is loosened, the barrel 1 is separated from the casing head 2, the threaded connection part 18 of the casing head 2 is connected or detached with the casing head, then the first fixing ring 24 and the second fixing ring 29 are clamped and fixed by the annular limiting part 10, the casing head 2 is fixed on the barrel 1, the casing head 2 is detachably connected with the barrel 1, and the casing head and the protection device can be quickly connected or detached.

[0054]

[0055] ​In one or more embodiments, the annular limiting member 10 is composed of a first clamping member 101 and a second clamping member 102, both of which are circular arc structures, and the first clamping member 101 and the second clamping member 102 are spliced to form an annular structure capable of being arranged on the first fixing ring 24 and the second fixing ring 29; the first clamping member 101 and the second clamping member 102 are detachably connected, and the operator can separate the first clamping member 101 and the second clamping member 102 to separate the casing joint 2 from the cylinder 1; the first clamping member 101 is provided with a first arc-shaped groove 91, the second clamping member 102 is provided with a second arc-shaped groove 92, the first arc-shaped groove 91 and the second arc-shaped groove 92 are butted to form an annular groove 9, the first fixing ring 24 is clamped in the annular groove 9, the second fixing ring 29 is clamped in the annular groove 9, and the first fixing ring 24 and the second fixing ring 29 are limited by the annular groove 9, so that the casing joint 2 is connected and fixed on the cylinder 1; the first fixing ring 24 is detachably connected with the first clamping member 101, and the first fixing ring 24 is detachably connected with the second clamping member 102; the second fixing ring 29 is detachably connected with the first clamping member 101, and the second fixing ring 29 is detachably connected with the second clamping member 102, facilitating the installation and disassembly of the casing joint 2.

[0056] In an optional embodiment, the first clamping member 101 and the second clamping member 102 abut, and the annular limiting member 10 further comprises a hoop ring, which is arranged around the first clamping member 101 and the second clamping member 102, and exerts force on the first clamping member 101 and the second clamping member 102 to firmly fix the first clamping member 101 and the second clamping member 102, seal the connection between the first fixing ring 24 and the second fixing ring 29, and prevent oil and gas leakage.

[0057] In an optional embodiment, the hoop ring is composed of a first arc-shaped member 11 and a second arc-shaped member 12, which are detachably connected, making the hoop ring easy to install and disassemble; the first arc-shaped member 11 and the second arc-shaped member 12 form a ring-shaped structure after being connected, the inner side of the ring-shaped structure is shaped to match the shape of the annular limiting member 10, the contact area between the hoop ring and the annular limiting member 10 is increased, the hoop ring uniformly exerts force on the annular limiting member 10, the first clamping member 101 and the second clamping member 102 are more tightly connected, the first fixing ring 24 and the second fixing ring 29 are more firmly connected, and the sealing effect is guaranteed.

[0058] In an optional embodiment, the hoop ring further comprises a connecting block 15, one end of the connecting block 15 is hinged to the first arc-shaped member 11, and the other end is hinged to the second arc-shaped member 12; the first arc-shaped member 11 is provided with a clasp member at the end away from the connecting block 15, the second arc-shaped member 12 is provided with a clasp part at the end away from the connecting block 15, and the clasp member is connected to the clasp part; by operating the clasp member, the inner diameter of the hoop ring can be changed, facilitating the installation or disassembly of the casing joint 2 on the cylinder 1.

[0059] In an optional embodiment, the first clamping piece 101 is provided with a sealing piece 93, the second clamping piece 102 abuts against the sealing piece 93, and the sealing piece 93 is a rubber structure that seals the connection between the first clamping piece 101 and the second clamping piece 102 to prevent oil and gas leakage.

[0060] In an optional embodiment, the first fixing ring 24 is spaced apart from the second fixing ring 29, the first fixing ring 24 is provided with a spring assembly, the spring assembly abuts against the second fixing ring 29, the first fixing ring 24 abuts against the groove wall of the annular groove 9 through the abutment of the spring assembly against the second fixing ring 29, the second fixing ring 29 abuts against the groove wall of the annular groove 9, the sealing effect of the connection between the annular limiting piece 10 and the first fixing ring 24 is ensured, the sealing effect of the connection between the annular limiting piece 10 and the second fixing ring 29 is ensured, and the spring assembly allows the first fixing ring 24 and the second fixing ring 29 to have a gap, facilitating the installation and disassembly of the second fixing ring 29.

[0061] In an optional embodiment, the spring assembly is composed of a plurality of spring pieces 27, the plurality of spring pieces 27 are arranged along the circumferential direction of the first fixing ring 24 and are arranged on the first fixing ring 24, and adjacent spring pieces 27 are spaced apart from each other, each spring piece 27 abuts against the second fixing ring 29, the second fixing ring 29 is uniformly stressed, and the sealing effect is ensured.

[0062] In an optional embodiment, the spring piece 27 is provided with a first connecting column 26, the first connecting column 26 is provided with a first limiting plate 14 and a second limiting plate 16, the first connecting column 26 is connected with the first fixing ring 24, the first limiting plate 14 and the second limiting plate 16 are respectively located on opposite sides of the spring piece 27, the first limiting plate 14 is spaced apart from the spring piece 27, and the second limiting plate 16 is spaced apart from the spring piece 27; the second fixing ring 29 is provided with a plurality of second connecting columns 25, the second connecting columns 25 are clamped and connected with the spring pieces 27; the spring piece 27 is butt-jointed with the second connecting column 25 on the second fixing ring 29, the second connecting column 25 plays a positioning role to avoid misplacement of the second fixing ring 29 during installation on the cylinder body 1, the second connecting column 25 also limits the spring piece 27 to avoid deviation of the spring piece 27 after being stressed, and the second fixing ring 29 can be tightly abutted against the side wall of the annular groove 9; the first limiting plate 14 and the second limiting plate 16 can block the deformed spring piece 27 to prevent the spring piece 27 from being detached from the second connecting column 25 after deformation.

[0063] In one or more embodiments, the cylinder body 1 is provided with a plurality of pipeline connecting pieces 7, the pipeline connecting pieces 7 are used to connect pipelines so that the pipelines can be in communication with the inside of the cylinder body 1.

[0064] Specifically, the casing head protection device comprises a barrel 1, an opening and closing assembly is arranged on the outer wall of the barrel 1 as a pipeline connecting piece 7, the opening and closing assembly is used for connecting a pipeline for gas flow, a sleeve is connected to the outer wall of the barrel 1 as an annular limiting piece 10, a quick release assembly clamp is arranged on the outer wall of the sleeve, the clamp is used for quickly dismounting or connecting the casing head 2 and the barrel 1, a spring assembly is arranged on the first fixing ring 24, the spring assembly pushes the second fixing ring 29, the first fixing ring 24 abuts against the annular limiting piece 10, the sealing performance is guaranteed, the second fixing ring abuts against the annular limiting piece 10, the sealing performance is guaranteed, and the sealing performance is good.

[0065] The clamp comprises a first arc-shaped piece 11, a second arc-shaped piece 12 and a connecting block 15, the arc-shaped inner side walls of the first arc-shaped piece 11 and the second arc-shaped piece 12 abut against the outer wall of the sleeve; a buckle piece is connected to one end of the first arc-shaped piece 11, the buckle piece is rotationally connected to the first arc-shaped piece 11 through a first rotating shaft 23; the buckle piece comprises a connecting rod 20 and a pull rod 21, the first rotating shaft 23 rotationally connects the connecting rod 20, the connecting rod 20 rotationally connects the pull rod 21, a connecting plate 28 is arranged on the pull rod 21, a second rotating shaft 19 is arranged on the buckle part of the second arc-shaped plate, and the connecting plate 28 rotationally connects the second rotating shaft 19; a third rotating shaft 13 and a fourth rotating shaft 17 are arranged on the connecting block 15, the connecting block 15 is rotationally connected to the first arc-shaped piece 11 through the third rotating shaft 13, and the connecting block 15 is rotationally connected to the second arc-shaped piece 12 through the fourth rotating shaft 17.

[0066] The outer wall of the first fixing ring 24 abuts against the annular groove 9 formed in the inner wall of the sleeve, the first fixing ring 24 is fixedly connected to a first connecting column 26 at the top, the first fixing ring 24 is more closely attached to the annular groove 9 through the extrusion of the spring piece 27, and the second fixing ring 29 is more closely attached to the annular groove 9; the first connecting column 26 is connected to the spring piece 27 at the top, one end of the spring piece 27 is connected to a second connecting column 25 arranged on the second fixing ring 29; one side of the outer wall of the first connecting column 26 is provided with a first limiting plate 14, and the other side is provided with a second limiting plate 16, the first limiting plate 14 and the second limiting plate 16 can effectively fix the spring piece 27, so that the spring piece 27 is prevented from deforming or deviating and falling off from the second connecting column 25; the second fixing ring 29 is arranged on the sleeve joint, and a threaded barrel is arranged on the sleeve joint as a threaded connecting part 18, which is used for connecting the casing head, and the casing head is threadedly connected to the casing head 2.

[0067] A protection core 22 is arranged in the barrel 1.

[0068] Specific, as the pipeline connecting piece 7 switch assembly includes connecting seat, connecting seat inner wall fixedly connected on the outer wall of the barrel 1, the connecting seat is screwed with screw, the connecting seat outer wall is fixedly connected with the first column, the first column outer wall one side is fixedly connected with the first block, the first block outer wall one side is fixedly connected with the second column, the second column outer wall one side is fixedly connected with the third column, the third column inside rotationally connected with the fourth column, the fourth column outer wall rotationally connected with hand wheel, through rotating hand wheel control gas flow.

[0069] The above merely preferred embodiments of the present application are described, and are not intended to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A casing head protector apparatus, characterized by, The utility model relates to a casing head, which comprises: a barrel (1) having a first fixing ring (24) at one end thereof; a casing joint (2) having a threaded connection part (18) for connecting with a casing head and a second fixing ring (29); an annular limiting member (10) oppositely arranged with the first fixing ring (24) and the second fixing ring (29), the annular limiting member (10) being clamped on the first fixing ring (24) and the second fixing ring (29), the annular limiting member (10) being detachably connected with the first fixing ring (24) and the second fixing ring (29).

2. A device for protecting a casing head as claimed in claim 1, wherein The annular limiting member (10) comprises a first clamping member (101) and a second clamping member (102), the first clamping member (101) and the second clamping member (102) being detachably connected, the first clamping member (101) being provided with a first arc-shaped groove (91), the second clamping member (102) being provided with a second arc-shaped groove (92), the first arc-shaped groove (91) and the second arc-shaped groove (92) being connected to form an annular groove (9), the first fixing ring (24) being clamped in the annular groove (9), the second fixing ring (29) being clamped in the annular groove (9); the first fixing ring (24) being detachably connected with the first clamping member (101) and the second clamping member (102); the second fixing ring (29) being detachably connected with the first clamping member (101) and the second clamping member (102).

3. A device according to claim 2, wherein The first clamping member (101) and the second clamping member (102) abut against each other, the annular limiting member (10) further comprising a hoop ring clamped on the first clamping member (101) and the second clamping member (102).

4. A device according to claim 3, wherein The hoop ring comprises a first arc-shaped member (11) and a second arc-shaped member (12), the first arc-shaped member (11) being detachably connected with the second arc-shaped member (12).

5. A device as claimed in claim 4, wherein the device is adapted to be attached to the casing head by means of a threaded connection. The hoop ring further comprises a connecting block (15), one end of the connecting block (15) being hingedly connected with the first arc-shaped member (11) and the other end being hingedly connected with the second arc-shaped member (12); the first arc-shaped member (11) being provided with a buckle member at one end away from the connecting block (15), the second arc-shaped member (12) being provided with a buckle part at one end away from the connecting block (15), the buckle member being connected with the buckle part.

6. A device for protecting a casing head as claimed in claim 3, wherein The first clamping member (101) is provided with a sealing member (93), the second clamping member (102) abutting against the sealing member (93).

7. A device for protecting a casing head as claimed in claim 2, wherein The first fixing ring (24) is provided with a spring assembly, the spring assembly abutting against the second fixing ring (29).

8. A device for protecting a casing head as claimed in claim 7, wherein The spring assembly comprises a plurality of spring members (27), the plurality of spring members (27) being arranged along the circumference of the first fixing ring (24) on the first fixing ring (24), the spring members (27) abutting against the second fixing ring (29).

9. A device for protecting a casing head as claimed in claim 8, wherein The spring piece (27) is provided with a first connecting column (26) provided with a first limiting plate (14) and a second limiting plate (16), the first connecting column (26) is connected with the first fixed ring (24), the first limiting plate (14) and the second limiting plate (16) are respectively located on opposite sides of the spring piece (27), the first limiting plate (14) is arranged in a spaced manner with the spring piece (27), and the second limiting plate (16) is arranged in a spaced manner with the spring piece (27); the second fixed ring (29) is provided with a plurality of second connecting columns (25), and the second connecting columns (25) are clamped and connected with the spring piece (27).

10. A device according to any one of claims 1 to 9, wherein The barrel (1) is provided with a plurality of pipeline connecting pieces (7), and the pipeline connecting pieces (7) are used for connecting pipelines.

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