Wellhead valve heating and heat preservation device

Abstract

The utility model relates to a wellhead valve heating and heat preservation device, and relates to the technical field of petrochemical engineering. The wellhead valve heating and heat preservation device comprises an upper shell, a lower shell, an air inlet valve and a steam pipeline, one side of the upper shell is hinged to one side of the lower shell, the other side of the upper shell is detachably connected with the other side of the lower shell, the air inlet valve is arranged on one side of the lower shell, and the steam pipeline is arranged in the lower shell and connected with the air inlet valve. And a plurality of steam spray holes are formed in the top of the steam pipeline. One side of the upper shell is hinged to one side of the lower shell, and the other side of the upper shell is detachably connected with the lower shell, so that the heating and heat preservation device for the wellhead valve can be conveniently mounted on the valve and wraps the valve inside. After steam is introduced into the steam pipeline through the air inlet valve, the steam is sprayed out through the steam spraying holes in the top of the steam pipeline to heat the valve. And a relatively closed space is formed between the upper shell and the lower shell, so that steam is not easy to dissipate to the outside, and a relatively good heating and heat preservation effect can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum chemical industry, in particular to a wellhead valve heating insulation device. BACKGROUND

[0002] The Christmas tree is the main equipment for controlling and regulating oil and gas production at the uppermost part of the oil and gas well. In natural gas exploitation, the Christmas tree valve controls the high and low of gas transmission pressure and the size of flow. After throttling at the wellhead, the pressure difference between the front and back is large, the natural gas temperature drops quickly, and hydrate is easily formed to cause blockage. After blockage, the pressure exceeds the pressure that the pipeline can bear, causing pipeline explosion and combustion, which poses a serious threat to the wellhead device and personnel. Therefore, a wellhead insulation device is needed to prevent hydrate from forming due to throttling.

[0003] Chinese patent with publication number CN111441736A discloses an underwater natural gas hydrate wellhead device with insulation function, which uses heat insulation medium between the inner pipe and the outer pipe to reduce heat loss. It is a passive insulation means that can only reduce heat loss without heating effect, so the effect is limited. SUMMARY

[0004] The utility model provides a kind of wellhead valve heating insulation device, steam is used to actively heat valve, can well avoid natural gas hydrate from forming due to throttling.

[0005] The utility model provides a kind of wellhead valve heating insulation device, including upper shell, lower shell, inlet valve and steam pipeline, the upper shell with the lower shell one side is hinged, the upper shell with the lower shell the other side is detachably connected, the inlet valve is arranged in the lower shell one side, the steam pipeline is arranged in the lower shell interior and is connected with the inlet valve, the steam pipeline top is equipped with multiple steam injection orifices.

[0006] In one embodiment, the steam pipeline includes two connecting pipes and at least two injection pipes, the steam injection orifices are opened on the injection pipes, the injection pipes are parallel to each other, and the two ends of the injection pipes are connected to one of the connecting pipes.

[0007] In one embodiment, the bottom of the lower shell is also provided with a liquid discharge hole.

[0008] In one embodiment, the lower shell is provided with a liquid discharge valve outside, and the liquid discharge valve is connected to the liquid discharge hole.

[0009] In one embodiment, the front surface of the upper shell and the front surface of the lower shell are both provided with a first semicircular hole.

[0010] In one embodiment, the lower shell is provided with a second semicircular hole on one side of the air inlet valve, and a third semicircular hole is provided on the opposite side of the lower shell, and a second semicircular hole and a third semicircular hole are also provided on the two sides of the upper shell respectively.

[0011] In one embodiment, the surface of the upper shell is provided with a first connecting piece, and the surface of the lower shell is provided with a second connecting piece, and the first connecting piece is detachably connected with the second connecting piece.

[0012] In one embodiment, the first connecting piece and the second connecting piece jointly form a buckle structure.

[0013] In one embodiment, the second connecting piece is further provided with a lock hole.

[0014] In one embodiment, a sealing piece is arranged between the upper shell and the lower shell.

[0015] Compared with the prior art, the utility model has the advantages that one side of the upper shell is hinged with one side of the lower shell, and the other side is detachably connected, so that the wellhead valve heating and heat preservation device can be conveniently installed on the valve and wrapped inside the valve. After the steam is introduced into the steam pipeline through the air inlet valve, the steam is sprayed out through the steam spray hole at the top of the steam pipeline, and the valve is heated. Since a relatively closed space is formed between the upper shell and the lower shell, the steam is not easy to dissipate to the outside, and a better heating and heat preservation effect can be obtained, so that the valve can be kept at a higher temperature, and the phenomenon of hydrate formation due to throttling of natural gas can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the following, the utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0017] Figure 1 is a perspective view of the wellhead valve heating and heat preservation device and the valve in the embodiment of the utility model;

[0018] Figure 2 is one of the perspective views of the wellhead valve heating and heat preservation device in the embodiment of the utility model;

[0019] Figure 3 is the second perspective view of the wellhead valve heating and heat preservation device in the embodiment of the utility model;

[0020] Figure 4 is the third perspective view of the wellhead valve heating and heat preservation device in the embodiment of the utility model;

[0021] Figure 5 is Figure 4 an exploded view;

[0022] Figure 6is Figure 5 Enlarged view at A in Figure 1.

[0023] Reference signs:

[0024] 1, upper shell; 2, lower shell; 3, air inlet valve; 4, steam pipe; 41, connecting pipe; 42, spray pipe; 5, liquid discharge valve; 6, first connecting piece; 7, second connecting piece; 100, steam spray hole; 200, liquid discharge hole; 300, first semicircular hole; 400, second semicircular hole; 500, third semicircular hole; 600, locking hole. DETAILED DESCRIPTION

[0025] The utility model will be further described below with reference to the drawings.

[0026] As Figures 1 to 3 shown, the wellhead valve heating and heat preservation device of the embodiment of the utility model includes upper shell 1, lower shell 2, air inlet valve 3 and steam pipe 4, upper shell 1 and one side of lower shell 2 are hinged by hinge, the other side of upper shell 1 and lower shell 2 is detachably connected, and air inlet valve 3 is arranged on one side of lower shell 2. Figure 4 and Figure 5 As shown, steam pipe 4 is arranged in the inside of lower shell 2 and is connected with air inlet valve 3, and a plurality of steam spray holes 100 are formed in the top of steam pipe 4. Since the steam spray holes 100 are all formed in the top of steam pipe 4, the steam sprayed from the steam spray holes 100 can directly heat the valve above it.

[0027] The design that one side of upper shell 1 and one side of lower shell 2 are hinged and the other side is detachably connected makes the wellhead valve heating and heat preservation device conveniently installed on the valve and wrapped inside. After steam is introduced into steam pipe 4 through air inlet valve 3, the steam is sprayed out through the steam spray holes 100 in the top of steam pipe 4 to heat the valve. Since a relatively closed space is formed between upper shell 1 and lower shell 2, the steam is not easy to dissipate to the outside, and a better heating and heat preservation effect can be obtained, so that the valve can be kept at a relatively high temperature, avoiding the phenomenon that hydrate is formed due to throttling of natural gas. In addition, the valve arranged in the inside of the wellhead valve heating and heat preservation device can reduce the thermal expansion and contraction effect caused by temperature change, reduce the aging speed of the equipment, and prolong the service life of the valve.

[0028] As Figure 5As shown, the steam pipe 4 includes two connecting pipes 41 and three spray pipes 42, the steam spray holes 100 are opened on the spray pipes 42, the spray pipes 42 are parallel to each other, and the two ends of the spray pipes 42 are connected with a connecting pipe 41 respectively. The steam pipe 4 is in a whole "day" shape structure, which can be connected with the inlet valve 3 as a whole, and is convenient for installation. The connecting pipe 41 makes the steam supplied to each spray pipe 42 while keeping a certain distance between each spray pipe 42, and multiple steam spray holes 100 are opened on each spray pipe 42, so that the steam can be dispersed in a larger range, and a better and more uniform heating effect is achieved.

[0029] As shown in Figure 5 The bottom of the lower shell 2 is also provided with a liquid discharge hole 200. The steam sprayed from the steam spray hole 100 will be condensed after pre-cooling, and if the lower shell 2 is not provided with the liquid discharge hole 200, water will accumulate inside the lower shell 2, causing poor steam discharge and seriously affecting the heating effect of the valve. Therefore, the condensed water needs to be discharged from the liquid discharge hole 200 in time to ensure the normal operation of the wellhead valve heating and insulation device.

[0030] Further, the lower shell 2 is provided with a liquid discharge valve 5 connected with the liquid discharge hole 200. By providing the liquid discharge valve 5, the liquid discharge hole 200 can be closed when there is no need to discharge condensed water, so that the inside of the wellhead valve heating and insulation device is not directly connected with the outside, reducing heat loss and ensuring a better heating effect.

[0031] As shown in Figure 2 The front surface of the upper shell 1 and the front surface of the lower shell 2 are both provided with a first semicircular hole 300. The two first semicircular holes 300 on the upper shell 1 and the lower shell 2 can form a complete circular hole, so that the upper shell 1 and the lower shell 2 can avoid the valve stem part when connected, ensuring that the wellhead valve heating and insulation device can be closed smoothly, and the wellhead valve heating and insulation device does not affect the operation of the valve after being closed.

[0032] As shown in Figure 2 The side of the lower shell 2 provided with the inlet valve 3 is provided with a second semicircular hole 400, and the opposite side of the lower shell 2 is provided with a third semicircular hole 500. The two sides of the upper shell 1 are also provided with a second semicircular hole 400 and a third semicircular hole 500 respectively. The two second semicircular holes 400 and the two third semicircular holes 500 on the upper shell 1 and the lower shell 2 are both for avoiding the corresponding pipelines, so that the wellhead valve heating and insulation device can be closed smoothly.

[0033] As shown in Figure 2As shown in the drawings, the surface of the upper shell 1 is provided with a first connecting piece 6, and the surface of the lower shell 2 is provided with a second connecting piece 7, and the first connecting piece 6 is detachably connected with the second connecting piece 7. The first connecting piece 6 and the second connecting piece 7 are in the form of detachable connection, so that the wellhead valve heating and insulation device can be conveniently opened or closed, and daily maintenance is facilitated.

[0034] Specifically, the first connecting piece 6 and the second connecting piece 7 jointly form a buckle structure. The buckle structure can be operated without tools, further reducing the operation difficulty.

[0035] As shown in the drawings, the second connecting piece 7 is further provided with a lock hole 600. When the first connecting piece 6 is connected with the second connecting piece 7, a padlock or other types of locks can be installed through the lock hole 600, so as to avoid that the upper shell 1 and the lower shell 2 are accidentally opened and the valve cannot be effectively heated. Figure 6

[0036] In order to improve the heating effect of the wellhead valve heating and insulation device, a sealing piece (not shown in the drawings) can be arranged between the upper shell 1 and the lower shell 2, so as to reduce the steam overflow, and also play a role in reducing energy consumption. The sealing piece is made of rubber, silicone or other elastic materials.

[0037] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.​

Claims

1. A heating and insulation device for a wellhead valve, characterized in that, The steam pipe is provided with a plurality of steam injection holes on the top.

2. The wellhead valve heating and insulation apparatus of claim 1, wherein, The bottom of the lower shell is further provided with a liquid discharge hole.

3. The wellhead valve heating and insulation apparatus of claim 1, wherein, The outer part of the lower shell is provided with a liquid discharge valve connected with the liquid discharge hole.

4. The wellhead valve heating and insulation apparatus of claim 3, wherein, The front of the upper shell and the front of the lower shell are both provided with a first semicircular hole.

5. The wellhead valve heating and insulation apparatus of claim 1, wherein, The side of the lower shell provided with the air inlet valve is provided with a second semicircular hole, and the opposite side of the lower shell is provided with a third semicircular hole.

6. The wellhead valve heating and insulation apparatus of claim 1, wherein, The surface of the upper shell is provided with a first connecting piece, and the surface of the lower shell is provided with a second connecting piece.

7. The wellhead valve heating and insulation apparatus of claim 1, wherein, The first connecting piece and the second connecting piece form a buckle structure.

8. The wellhead valve heating and insulation apparatus of claim 7, wherein, The second connecting piece is further provided with a lock hole.

9. The wellhead valve heating and insulation apparatus of claim 8, wherein, A sealing piece is arranged between the upper shell and the lower shell.

10. The wellhead valve heating and insulation apparatus of claim 1, wherein, ​

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