Wellhead device with filtering structure

Abstract

The utility model discloses a wellhead device with a filtering structure, which relates to the field of wellhead devices, and is characterized by comprising a mounting seat connected with a petroleum wellhead, an oil outlet valve is arranged on one side of the mounting seat, a sealing top cover is detachably connected to the top end of the mounting seat, a filtering assembly is mounted at the bottom of the sealing top cover, and the filtering assembly is connected with the oil outlet valve. Petroleum can be filtered before passing through the petroleum outlet valve, a blow-down valve is arranged on the other side of the mounting seat, and the petroleum filtering device has the effects that the petroleum is filtered between the petroleum pipeline and the petroleum outlet valve through the filtering assembly, so that the corresponding problems caused by too many impurities in the petroleum are avoided, and the filtered impurities are discharged through a blow-down pipe.

Description

Technical Field

[0001] The utility model relates to the field of wellhead devices, and more specifically, to a wellhead device with a filtering structure. Background Art

[0002] The oil wellhead device is a key equipment in oil production and has multiple important functions. It can control the wellhead pressure, monitor and adjust the pressure of oil and natural gas produced underground, prevent dangerous accidents such as blowouts, and ensure the safety of the wellhead; hang the oil pipe and casing, support and ensure their stable position in the well, and bear their weight; effectively seal the wellhead to prevent oil and gas leakage and the entry of external impurities and water, etc.

[0003] Most of the common oil wellhead devices currently lack effective filtering structures, which results in the oil extracted from the bottom of the well often carrying a large amount of impurities and particles. These impurities not only affect the quality of the oil, but may also cause wear and blockage to subsequent transportation, processing and use equipment, increasing maintenance costs and production risks.

[0004] Therefore, in order to solve the above technical problems, the present application proposes a wellhead device with a filtering structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a wellhead device with a filtering structure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wellhead device with a filtering structure, comprising a mounting seat connected to an oil wellhead, an oil outlet valve being arranged on one side of the mounting seat, a sealing top cover being detachably connected to the top of the mounting seat, a filtering assembly being installed at the bottom of the sealing top cover, which can filter the oil before it passes through the oil outlet valve, and a drain valve being arranged on the other side of the mounting seat.

[0007] Preferably, the filter assembly includes a shell having a transverse portion and a vertical portion that are interconnected, the side end of the transverse portion is connected to the oil outlet valve through a hose, the bottom end of the vertical portion is connected to the drain valve through a hose, the body of the vertical portion is connected to the oil pipeline in the well through a hose, and a filter screen is provided inside the vertical portion above the hose connected to the oil pipeline.

[0008] Preferably, the surface of the shell is sealed and connected with a detachable side plate, and the inside of the shell can be cleaned by removing the side plate.

[0009] Preferably, an electric valve is arranged at the position where the horizontal portion and the vertical portion intersect and are opposite to the filter screen, and an electric air cylinder is installed at the top of the electric valve to remove impurities attached to the bottom of the filter screen.

[0010] Preferably, the bottom of the vertical portion is configured to be a slope inclined all around toward the hose portion connected to the drain valve, so that impurities can enter the hose due to gravity and finally be discharged from the drain valve, thereby avoiding the problem of a large amount of impurities remaining at the bottom of the vertical portion.

[0011] Preferably, a sealing ring is provided on the inner surface of the sealing top cover, and the sealing ring is in an inverted shape and adheres to the inner side wall and the top wall of the sealing top cover to perform double-sided sealing.

[0012] Preferably, mounting plates with heads fixed to screws are welded to the front and rear sides of the outer wall of the mounting seat, fixing plates with through holes are installed to the front and rear sides of the outer wall of the sealing top cover, and nuts are threadedly connected to the outer wall of the screw.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model filters the oil between the oil pipeline and the oil outlet valve through a filter assembly to avoid too many impurities in the oil, which may cause corresponding problems. The filtered impurities are discharged from the sewage pipe, thereby solving the problem in the background technology that if the impurities are not filtered, it will not only affect the quality of the oil, but also may cause wear and blockage to the subsequent transportation, processing and use equipment, increasing maintenance costs and production risks;

[0015] 2. The utility model sets the bottom of the vertical part into a slope shape that is inclined all around toward the hose part connected to the drain valve, so that impurities can enter the hose due to gravity and finally be discharged from the drain valve, avoiding the problem of a large amount of impurities remaining at the bottom of the vertical part;

[0016] 3. The utility model opens the electric valve through the controller regularly, and then opens the electric cylinder through the controller, so that air can be blown to the top of the filter through the electric cylinder to blow down the impurities attached to the bottom of the filter. The impurities are finally discharged from the drain valve to relieve the blockage of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the top specific structure of the utility model;

[0020] Figure 3This is a schematic diagram of the connection structure of the sealing top cover in the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the shell in the utility model.

[0022] In the figure: 1. Mounting seat; 2. Oil outlet valve; 3. Sealing top cover;

[0023] 4. Filter assembly; 41. Shell; 411. Horizontal part; 412. Vertical part; 42. Filter screen; 43. Side plate; 44. Electric valve; 45. Electric cylinder;

[0024] 5. Drain valve; 6. Sealing ring; 7. Mounting plate; 8. Screw; 9. Fixing plate; 10. Through hole. DETAILED DESCRIPTION

[0025] like Figure 1-4 As shown, the utility model provides a wellhead device with a filtering structure, including a mounting seat 1 connected to an oil wellhead, an oil outlet valve 2 is arranged on one side of the mounting seat 1, a sealing top cover 3 is detachably connected to the top of the mounting seat 1, a filtering assembly 4 is installed at the bottom of the sealing top cover 3 to filter the oil before it passes through the oil outlet valve 2, a drain valve 5 is arranged on the other side of the mounting seat 1, the oil is filtered between the oil pipeline and the oil outlet valve 2 through the filtering assembly 4 to avoid too many impurities in the oil and cause corresponding problems, the filtered impurities are discharged from the drain pipe (the impurities are mixed with part of the oil and discharged from the drain pipe), and the filtering assembly 4 is installed on the sealing top cover 3, and the filtering assembly 4 can be removed by removing the sealing top cover 3, so that the filtering assembly 4 can be cleaned or replaced.

[0026] A sealing ring 6 is provided on the inner surface of the sealing top cover 3, and the sealing ring 6 is in an inverted shape and adhered to the inner side wall and the top wall of the sealing top cover 3. The front and rear sides of the outer side wall of the mounting seat 1 are welded with mounting plates 7 fixed with the head and the screw 8. The front and rear sides of the outer side wall of the sealing top cover 3 are installed with fixing plates 9 with through holes 10 provided inside, and the outer side wall of the screw 8 is threadedly connected with a nut.

[0027] When installing the sealing top cover 3, the sealing top cover 3 is stuck on the top of the mounting seat 1. Due to the special shape of the sealing ring 6, when the inner top wall of the sealing top cover 3 contacts the top wall of the mounting seat 1, and the outer side wall of the sealing top cover 3 contacts the outer side wall of the mounting seat 1, the sealing ring 6 will also contact the top wall and outer side wall of the mounting seat 1, thereby sealing both sides. Compared with the single-sided sealing in the prior art, the sealing effect is better. At this time, the through hole 10 on the fixing plate 9 also passes through the screw 8 on the mounting plate 7. After passing through, turn the nut clockwise to install the nut on the screw 8. The nut moves downward along the screw 8 and slowly rests on the top of the fixing plate 9 to complete the connection between the sealing top cover 3 and the mounting seat 1. Conversely, turn the nut counterclockwise to remove the nut from the screw 8, and then pull the sealing top cover 3 off the mounting seat 1. The disassembly is very convenient, which is conducive to cleaning or replacing the filter assembly 4.

[0028] The following is the specific structure of the filter assembly 4: the filter assembly 4 includes a shell 41 (the surface of the shell 41 is sealed with a detachable side plate 43, and the surface opening of the shell 41 is sealed by the side plate 43. The inside of the shell 41 can be cleaned by removing the side plate 43. A sealing gasket is provided on the connection between the side plate 43 and the shell 41 to ensure the sealing of the shell 41 when in use), which has a transverse portion 411 and a vertical portion 412 that are interconnected. The side end of the transverse portion 411 is connected to the oil outlet valve 2 through a hose, and the bottom end of the vertical portion 412 is connected to the drain valve 5 through a hose. The body of the vertical portion 412 is connected to the oil pipeline in the well through a hose. The interior of the vertical portion 412 is located above the hose connected to the oil pipeline. There is a filter screen 42, that is, open the oil outlet valve 2, and the oil can be input into the shell 41 through the oil pump acting on the oil pipeline, and finally discharged from the oil outlet valve (the other valves are in a closed state). When passing through the shell 41, it will be filtered by the filter screen on the vertical part 412, and impurities can be discharged from the bottom of the vertical part 412 through the drain valve 5. It should be noted that the above-mentioned hose has a certain length, which allows the sealing top cover 2 to be separated from the mounting seat 1 and move upward a certain distance. At this time, the connection between the contact sealing component and the multiple hoses can be used to disassemble the filter component 4 for cleaning or replacement (conversely, before installing the sealing top cover 2, the filter component 4 must be connected to the multiple hoses first), and the drain valve 5 pipeline must also be equipped with an oil pump for drainage.

[0029] Furthermore, the bottom of the vertical portion 412 is configured to be a slope that is inclined all around toward the hose portion connected to the drain valve 5, so that it is convenient for impurities to enter the hose due to gravity and finally be discharged from the drain valve 5, thereby avoiding the problem of a large amount of impurities remaining at the bottom of the vertical portion 412. An electric valve 44 is provided at the intersection of the horizontal portion 411 and the vertical portion 412 and at the position opposite to the filter 42, and an electric air cylinder 45 is installed at the top of the electric valve 44. The electric valve 44 can be opened regularly by a controller, and then the electric air cylinder 45 is opened by the controller (at this time, no oil passes through the shell 41), and air can be blown to the top of the filter 42 through the electric cylinder to blow off the impurities attached to the bottom of the filter 42, and the impurities are finally discharged from the drain valve 5.

[0030] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A wellhead device with a filtering structure, comprising a mounting seat (1) connected to an oil wellhead, an oil outlet valve (2) being arranged on one side of the mounting seat (1), characterized in that: The top end of the mounting seat (1) is detachably connected to a sealing top cover (3), the bottom of the sealing top cover (3) is installed with a filter assembly (4) to filter the oil before it passes through the oil outlet valve (2), and a drain valve (5) is arranged on the other side of the mounting seat (1).

2. A wellhead device with a filtering structure according to claim 1, characterized in that: The filter assembly (4) comprises a housing (41) having a lateral portion (411) and a vertical portion (412) which are interconnected, the side end of the lateral portion (411) being connected to an oil outlet valve (2) via a hose, the bottom end of the vertical portion (412) being connected to a drain valve (5) via a hose, the body of the vertical portion (412) being connected to an oil pipeline in a well via a hose, and a filter screen (42) being arranged inside the vertical portion (412) above the hose connected to the oil pipeline.

3. A wellhead device with a filtering structure according to claim 2, characterized in that: A detachable side plate (43) is sealingly connected to the surface of the housing (41).

4. The wellhead device with a filtering structure according to claim 2, characterized in that: An electric valve (44) is provided at a position where the horizontal portion (411) and the vertical portion (412) intersect and are opposite to the filter screen (42), and an electric air cylinder (45) is installed at the top end of the electric valve (44).

5. The wellhead device with a filtering structure according to claim 2, characterized in that: The bottom of the vertical portion (412) is arranged in a slope shape with all sides inclined toward a hose portion connected to the sewage valve (5).

6. The wellhead device with a filtering structure according to claim 1, characterized in that: A sealing ring (6) is provided on the inner surface of the sealing top cover (3), and the sealing ring (6) is in an inverted shape and adheres to the inner side wall and the top wall of the sealing top cover (3).

7. The wellhead device with a filtering structure according to claim 1, characterized in that: The front and rear sides of the outer wall of the mounting seat (1) are welded with mounting plates (7) whose heads are fixed to the screw rods (8), the front and rear sides of the outer wall of the sealing top cover (3) are installed with fixing plates (9) with through holes (10) inside, and the outer wall of the screw rods (8) is threadedly connected with nuts.

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