Cleaning device for hydrophobic valve of oil and gas field separator

Abstract

The application provides a cleaning device for a hydrophobic valve of an oil and gas field separator, a barrel body comprising an inlet connected with an outlet end of a separator discharge pipeline, a water outlet connected with an inlet end of the hydrophobic valve and a sand outlet connected with an inlet end of a sand storage tank, the inlet and the sand outlet being located at opposite ends of the barrel body, a filter screen being arranged in the barrel body, two ends of the filter screen being connected with the inlet and an inner wall near one end of the sand outlet respectively, one end of the filter screen near the sand outlet being a closed end, so as to divide the barrel body into a sand settling chamber and a filtering chamber, and the water outlet being located at a side of the barrel body and being communicated with the filtering chamber. The cleaning device is used for flowing solid and liquid in the separator to the barrel body of the hydrophobic valve under the action of gravity, the solid is intercepted by the filter screen and is left in the filter screen, the filtered liquid enters the barrel body of the hydrophobic valve to realize automatic liquid discharge, the solid in the filter screen is discharged by using a manual discharge process, the solid and the liquid are discharged through two channels, and the problem that the sealing surface is damaged due to impurities entering the hydrophobic valve is effectively eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and petrochemical system operation devices, and particularly relates to a cleaning device for a hydrophobic valve of an oil and gas field separator. BACKGROUND

[0002] The gravity type separator is a kind of solid-liquid separator widely used in stations, which separates liquid and solid in natural gas to make it qualified natural gas. The principle is that the natural gas from the well bottom reduces the flow rate after entering the separator, and because the density of liquid and solid is far greater than that of natural gas, according to the gravity principle, the liquid and solid with high density are deposited in the liquid accumulation bag under the separator cylinder to be stored. After collecting a certain amount of liquid and solid, the sewage valve is opened manually according to the liquid level to discharge the liquid to the storage tank by using the pressure difference between the inside and outside of the cylinder.

[0003] In order to improve the automatic management ability, reduce the frequency of manual discharge and reduce the risk of manual discharge, some separators are equipped with automatic sewage hydrophobic valves, which can guide the liquid and solid impurities in the liquid accumulation bag of the separator to the cylinder of the hydrophobic valve through the pipeline. A float ball is installed in the cylinder, and when the liquid in the cylinder is collected to a certain amount, the float ball floats on the float ball by using the buoyancy principle, drives the valve core on the connecting rod to move upward, the valve core leaves the valve seat, and the liquid in the cylinder is discharged to the storage tank through the pipeline under the action of the pressure difference. Because the formation water contains some impurities, especially a large amount of ceramic sand used for fracturing, the impurities are easy to pierce the sealing surface of the valve seat and the valve core under high-speed flow, or the fracturing sand deposited on the sealing surface of the valve seat and the valve core after the discharge of the liquid is completed, which also causes the sealing failure, resulting in poor sealing, causing the natural gas in the separator to leak through the discharge channel of the hydrophobic valve under the pressure difference, causing waste of natural gas, and causing the risk of pollution of the environment and flammable and explosive environment. In order to eliminate the leakage, the sealing condition of the hydrophobic valve needs to be checked and maintained frequently.

[0004] At present, when the hydrophobic valve is used, a filter is installed on the hydrophobic valve to filter the impurities in the liquid, which needs to be checked and cleaned regularly, and there is no filter equipment that can intercept the solid impurities in the liquid, so that the filtered liquid enters the hydrophobic valve for collection without disassembling the equipment. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a cleaning device for a hydrophobic valve of an oil and gas field separator. When used, the solid and liquid in the separator flow to the cylinder of the hydrophobic valve under gravity, the solid is intercepted by the filter screen installed in the cylinder and remains in the filter screen, and the filtered liquid enters the cylinder of the hydrophobic valve to realize automatic liquid discharge. The solid in the filter screen is discharged into the storage tank by using the process of manual discharge, realizing the discharge of the solid and liquid in two channels, and effectively eliminating the problem of damage to the sealing surface caused by the impurities entering the hydrophobic valve.

[0006] To solve the above technical problems, the technical scheme provided by the present application is as follows:

[0007] The cleaning device for the hydrophobic valve of the oil and gas field separator comprises a cylinder, wherein the cylinder comprises an inlet connected with the outlet end of the separator discharge pipeline, a water outlet connected with the inlet end of the hydrophobic valve, and a sand outlet connected with the inlet end of the sand storage tank; the inlet and the sand outlet are located at opposite ends of the cylinder; a filter screen is arranged in the cylinder; the two ends of the filter screen are connected with the inlet and the inner wall near one end of the sand outlet, respectively; one end of the filter screen near the sand outlet is a closed end, so as to divide the cylinder into a sand settling chamber and a filtering chamber; and the water outlet is located on the side of the cylinder and communicates with the filtering chamber.

[0008] According to the cleaning device for the hydrophobic valve of the oil and gas field separator, the inlet at the two ends of the cylinder, the sand outlet, and the water outlet on the side of the cylinder form a tee-shaped structure; when the hydrophobic valve is working, liquid enters the pipeline through the filter screen under the action of gravity and reaches the cylinder of the hydrophobic valve; the float ball in the cylinder of the hydrophobic valve drives the valve core on the connecting rod to move upward under the action of buoyancy, the valve core and the valve seat passage are opened, and automatic liquid discharge is realized under the pressure difference in the cylinder of the hydrophobic valve; solid impurities are intercepted by the filter screen and accumulated on the inner wall of the filter screen; the solid impurities are discharged from the pipeline connected with the sand outlet to the sand storage tank by manual liquid discharge, which effectively eliminates the problem that the sealing surface is damaged due to the entry of impurities into the hydrophobic valve and does not affect the normal work of the hydrophobic valve, and is also beneficial to the discharge of solid particles in the sand settling chamber.

[0009] For the above technical scheme, further improvements can be made as follows.

[0010] According to the cleaning device for the hydrophobic valve of the oil and gas field separator, in a preferred embodiment, the filter screen is fixed on the inner wall of the cylinder by a conical frame.

[0011] By fixing the filter screen by the conical frame, the shape of the filter screen is ensured not to change and the filter screen is fixed to be isolated into the sand settling chamber and the filtering chamber in the cylinder, a conical filter screen structure can be formed, small inlet and large outlet are adopted, when manual discharge is performed, solid particles will not directly impact the filter screen, but will move along the inner wall surface of the filter screen, drive the solid particles remaining on the filter screen, and play a role in cleaning the filter screen, after intercepting the solid particles, the solid particles are left in the sand settling chamber of the inner wall of the filter screen, and due to the conical structure of the filter screen, the cross-sectional area of the filter screen is much larger than that of the pipeline, so the filter screen is not easy to be blocked.

[0012] Specifically, the filter screen is fixed on the conical frame by bonding or welding, the fixing mode is that the conical frame is outside and the filter screen is inside, and a conical filter core with support is formed by combination; when the liquid containing solid particles passes through the conical filter core, the liquid smoothly passes through the conical filter core and the solid particles are intercepted on the filter core; after intercepting the solid particles, the solid particles are left in the sand settling chamber of the inner wall of the filter screen, and play a role in filtering the liquid.

[0013] Specifically, in a preferred embodiment, the conical frame is made of steel with a taper of 1:10 to 1:5.

[0014] The conical frame with the above structure can greatly ensure the stable and reliable fixation and support of the filter screen.

[0015] Further, in a preferred embodiment, a sealing component is arranged between the end of the filter screen close to the sand outlet and the inner wall of the cylinder.

[0016] By arranging the sealing component, the sealing effect of the closed end can be effectively ensured, and the solid particles entering the filter chamber to affect the filtering effect can be effectively avoided.

[0017] Further, in a preferred embodiment, a cyclone pipe is arranged at the inlet.

[0018] The cyclone pipe does not affect the drainage effect of the hydrophobic valve when in use. Only when manual liquid drainage is adopted, the cyclone pipe can guide the liquid to flow in a tangent direction, and drive the solid particles intercepted on the filter screen, thereby improving the sand drainage effect.

[0019] Further, in a preferred embodiment, the cyclone pipe comprises a seamless pipe and two or more spiral blades arranged on the inner wall of the seamless pipe.

[0020] When the flowing liquid and natural gas pass through the cyclone pipe, the flow rate increases, and under the guidance of the multiple spiral blades, the liquid and natural gas will rotate in the filter screen supported by the conical frame, thereby driving the flow of the solid particles intercepted on the filter screen to enter the storage tank with the discharged liquid, thereby achieving the purpose of cleaning impurities without disassembling the device.

[0021] Further, in a preferred embodiment, the diameters of the two ends of the cylinder are consistent with the diameters of the outlet end of the separator discharge pipeline and the pipeline connected to the inlet end of the sand storage tank, respectively, the diameter of the middle part of the cylinder is larger than the diameters of the two ends of the cylinder, and the two ends of the cylinder and the middle part of the cylinder are connected in a gradually expanding arc structure.

[0022] The two-segment structure with a small outer diameter and a large middle diameter of the cylinder can ensure that the diameters of the filter screen inlet and the sand outlet are consistent with the diameters of the connected pipelines, which can avoid damaging the filter core due to pipeline diameter change or flow rate, increase the interception area of the filter screen entering the hydrophobic valve, and increase the volume of solid impurities stored on the inner surface of the filter core. Moreover, the installation of the cylinder and the conical frame can be satisfied, and sufficient space for the filter chamber and the sand settling chamber can be formed in the cylinder.

[0023] Specifically, in a preferred embodiment, the middle part of the cylinder is in a cylindrical structure.

[0024] The cylindrical structure is easy to process and manufacture, and is convenient to install and arrange.

[0025] Specifically, in a preferred embodiment, the filter screen is a 80-300 mesh filter screen.

[0026] The filter screen with the above structure can greatly meet the cleaning requirements of the hydrophobic valve of the oil and gas field separator.

[0027] Further, in a preferred embodiment, the inlet, the water outlet and the sand outlet are each provided with a mounting flange.

[0028] By providing the mounting flange on the inlet, the water outlet and the sand outlet of the "three-way" structure, the convenience of installation, maintenance and operation of the entire cleaning device can be greatly improved.

[0029] Compared with the prior art, the advantages of the present application are that: when used, the solids and liquids in the separator flow to the hydrophobic valve cylinder under gravity, the solids are intercepted by the filter screen installed in the cylinder and remain in the filter screen, the filtered liquid enters the hydrophobic valve cylinder, automatic liquid discharge is realized, the solids in the filter screen are discharged into the storage tank by manual discharge process, solid and liquid two-channel discharge is realized, and the problem of damage to the sealing surface due to impurities entering the hydrophobic valve is effectively eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0030] In the following, the present application will be described in more detail based on embodiments and with reference to the drawings. In which:

[0031] Figure 1 The installation structure of the cleaning device 10 for the hydrophobic valve of the oil and gas field separator according to the embodiment of the present application is schematically shown.

[0032] Figure 2 The overall structure of the cleaning device 10 for the hydrophobic valve of the oil and gas field separator according to the embodiment of the present application is schematically shown.

[0033] In the drawings, the same components use the same reference numerals. The drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in combination with the drawings and specific embodiments, but the protection scope of the present application is not limited thereby.

[0035] Figure 1 The installation structure of the cleaning device 10 for the hydrophobic valve of the oil and gas field separator according to the embodiment of the present application is schematically shown. Figure 2 The overall structure of the cleaning device 10 for the hydrophobic valve of the oil and gas field separator according to the embodiment of the present application is schematically shown.

[0036] As Figure 1 andFigure 2 As shown, the cleaning device 10 for the hydrophobic valve of the oil and gas field separator of the embodiment of the present application comprises a cylinder 1, wherein the cylinder 1 comprises an inlet 11 connected with the outlet end of the separator 100 discharge pipeline, a water outlet 12 connected with the inlet end of the hydrophobic valve 200, and a sand outlet 13 connected with the inlet end of the sand storage tank 300, the inlet 11 and the sand outlet 13 are located at opposite ends of the cylinder 1, a filter screen 2 is arranged in the cylinder 1, the filter screen 2 is connected with the inner wall at the inlet 11 and the end close to the sand outlet 13 respectively, the end of the filter screen 2 close to the sand outlet 13 is a closed end, so as to divide the cylinder 1 into a sand settling chamber 14 and a filtering chamber 15, and the water outlet 12 is located at the side of the cylinder 1 close to the middle position and communicates with the filtering chamber 15. Preferably, the water outlet 12 is arranged in a vertically downward direction.

[0037] According to the cleaning device for the hydrophobic valve of the oil and gas field separator of the embodiment of the present application, the inlet, the sand outlet at the two ends of the cylinder and the water outlet at the side form a tee structure, when the hydrophobic valve works, the liquid enters the pipeline through the filter screen under the action of gravity and reaches the cylinder of the hydrophobic valve, the float ball in the cylinder of the hydrophobic valve drives the valve core on the connecting rod to move upward under the action of buoyancy, the valve core and the valve seat passage are opened, and automatic liquid discharge is realized under the pressure difference in the cylinder of the hydrophobic valve, the solid impurities are intercepted by the filter screen and gathered on the inner wall of the filter screen, the solid impurities are discharged from the pipeline connected with the sand outlet to the sand storage tank by manual liquid discharge, the problem that the sealing surface is damaged due to the impurities entering the hydrophobic valve is effectively eliminated, the normal work of the hydrophobic valve is not affected, and the solid particles in the sand settling chamber are also discharged.

[0038] Specifically, in the embodiment, the filter screen 2 is a filter screen with 80-300 meshes. The filter screen with the above structure can greatly meet the cleaning requirements of the hydrophobic valve of the oil and gas field separator. Further, in the embodiment, the inlet 11, the water outlet 12 and the sand outlet 13 are all provided with mounting flanges 4. By arranging the mounting flanges on the inlet, the water outlet and the sand outlet of the above tee structure, the convenience of installation, maintenance and operation of the entire cleaning device can be greatly improved.

[0039] As Figure 2As shown, further, in the present embodiment, the filter screen 2 is fixed on the inner wall of the cylinder body 1 by a conical frame 3. By fixing the filter screen by the conical frame, the shape of the filter screen is ensured not to change and the filter screen is fixed in the cylinder body to separate into a sand settling chamber and a filtering chamber, a conical filter screen structure is formed, small inlet and large outlet are adopted, when manual discharge is performed, solid particles will not directly impact the filter screen, but will move along the inner wall surface of the filter screen, drive the solid particles remaining on the filter screen, play a role of cleaning the filter screen, after intercepting the solid particles, the solid particles are left in the sand settling chamber of the inner wall of the filter screen, the filter screen is not easy to be blocked due to the cross-sectional area of the conical filter screen being far greater than the cross-sectional area of the pipeline. Specifically, the filter screen 2 is fixed on the conical frame 3 by bonding or welding, the fixing mode is that the conical frame 3 is outside the filter screen 2 and the filter screen 2 is inside the conical frame 3, and a conical filter core with support is formed by combination, when the liquid containing solid particles passes through the conical filter core, the liquid passes through the conical filter core smoothly and the solid particles are intercepted on the filter core, after intercepting the solid particles, the solid particles are left in the sand settling chamber of the inner wall of the filter screen, and the role of filtering the liquid is played. Specifically, in the present embodiment, the conical frame 3 is a steel frame with a taper of 1:10-1:5. The conical frame with the above structure can greatly ensure the fixation and stable support of the filter screen.

[0040] As shown, Figure 2 further, in the present embodiment, a sealing member 5 is arranged between one end of the filter screen 2 close to the sand outlet 13 and the inner wall of the cylinder body 2. Specifically, the conical frame 3 is welded on the cyclone pipe 6 at the inlet end and is bonded with a sealing rubber strip at the outlet end, by arranging the sealing member, the sealing effect of the closed end can be effectively ensured, and the solid particles are effectively prevented from entering the filtering chamber to affect the filtering effect.

[0041] As shown, Figure 2 further, in the present embodiment, the cyclone pipe 6 is arranged at the inlet 11. The cyclone pipe does not affect the drainage effect of the drain valve when used, only when manual liquid discharge is adopted, the cyclone pipe can guide the liquid to flow in the tangent direction, drive the solid particles intercepted on the filter screen, and improve the sand discharge effect. Further, in the present embodiment, the cyclone pipe 6 includes a seamless pipe and two or more groups of spiral blades arranged on the inner wall of the seamless pipe. The cyclone pipe 6 is connected with the conical frame 3 at the inlet by welding a plurality of spiral blades on the inner wall of the seamless pipe, the inner diameter of the cyclone pipe is slightly smaller than the inner diameter of the inlet pipeline, when the liquid and natural gas flow through the cyclone pipe, the flow rate is increased, under the guidance of the plurality of spiral blades, the liquid and natural gas will rotate and flow in the filter screen supported by the conical frame, drive the flow of the solid particles intercepted on the filter screen, with the discharged liquid entering the storage tank, the purpose of cleaning impurities without disassembling the device is achieved.

[0042] Further, in the embodiment, the diameters of the two ends of the cylinder 1 are consistent with the diameters of the outlet end of the discharge pipeline of the separator 100 and the pipeline connected with the inlet end of the sand storage tank 300 respectively, the middle part of the cylinder 1 has a diameter larger than that of the two ends of the cylinder 1, and the two ends of the cylinder 1 and the middle part of the cylinder 1 are connected in a gradually expanding arc structure. The cylinder has a structure of two sections with small outer diameters and a middle part with a large diameter, which can ensure that the diameters of the filter screen inlet and the sand outlet are consistent with the diameters of the connected pipelines, which can avoid damaging the filter core due to pipeline diameter change or flow rate, increase the interception area of the filter screen entering the drain valve, and increase the volume of solid impurities retained on the inner surface of the filter core. In addition, the cylinder and the conical frame can be installed, and a sufficient space for the filter cavity and the sand settling cavity can be formed in the cylinder. Specifically, in a preferred embodiment, the middle part of the cylinder is in a cylindrical structure. The cylindrical structure of the cylinder is easy to process and manufacture, and is convenient for installation and arrangement.

[0043] According to the above embodiment, it can be seen that the cleaning device for the drain valve of the oil and gas field separator of the present application is used. The solid and liquid in the separator flow to the drain valve cylinder under the action of gravity, the solid is intercepted by the filter screen installed in the cylinder and retained in the filter screen, and the filtered liquid enters the drain valve cylinder to realize automatic liquid discharge. The solid in the filter screen is discharged into the storage tank by manual discharge process, realizing the discharge of solid and liquid in two channels, and effectively eliminating the problem of damage to the sealing surface caused by impurities entering the drain valve.

[0044] 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 cleaning device for a hydrophobic valve of a gas and oil field separator, characterized in that, The device comprises a cylinder; wherein The cylinder comprises an inlet connected with an outlet end of a separator discharge pipeline, a water outlet connected with an inlet end of a steam trap, and a sand outlet connected with an inlet end of a sand storage tank; The cylinder inlet and the sand outlet are located at opposite ends of the cylinder, and a cyclone pipe is arranged at the cylinder inlet, the cyclone pipe comprising a seamless pipe and two or more spiral vanes arranged on the inner wall of the seamless pipe; A filter screen is arranged in the cylinder, and two ends of the filter screen are connected with the inner wall of the cylinder inlet and an end close to the sand outlet, respectively, and the end of the filter screen close to the sand outlet is a closed end, so as to divide the cylinder into a sand settling chamber and a filtering chamber, the filter screen is fixed on the inner wall of the cylinder by a conical frame, the conical frame is outside, and the filter screen is inside, so as to form a conical filter core with support; The water outlet is located at the side of the cylinder and communicates with the filtering chamber; The diameters of the two ends of the cylinder are consistent with the diameter of the outlet end of the separator discharge pipeline and the diameter of the pipeline connected with the inlet end of the sand storage tank, respectively, the diameter of the middle part of the cylinder is larger than the diameters of the two ends of the cylinder, and the two ends of the cylinder and the middle part of the cylinder are connected by a gradually expanding arc structure.

2. The cleaning device for a hydrophobic valve of a gas and oil field separator according to claim 1, characterized in that, The conical frame is made of steel and has a taper of 1:10-1:

5.

3. A cleaning device for a hydrophobic valve of a gas and oil field separator according to claim 1 or 2, characterized in that, A sealing part is arranged between the end of the filter screen close to the sand outlet and the inner wall of the cylinder.

4. The cleaning device for a hydrophobic valve of a gas and oil field separator according to claim 1, characterized in that, The middle part of the cylinder has a cylindrical structure.

5. The cleaning device for a hydrophobic valve of a gas and oil field separator according to claim 1 or 2, characterized in that, The filter screen is a filter screen with a mesh size of 80-300.

6. The cleaning device for a hydrophobic valve of a gas and oil field separator according to claim 1 or 2, characterized in that, The cylinder inlet, the water outlet, and the sand outlet are all provided with mounting flanges.

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