Wellhead equipment for oil exploitation

Abstract

The utility model relates to the field of oil exploitation, in particular to wellhead equipment for oil exploitation, which comprises a pipeline and a connecting ring plate connected to the top of the pipeline, a protective cover plate component is arranged above the connecting ring plate, one end of the protective cover plate component is connected with a swing mechanism, and the protective cover plate component is connected with the connecting ring plate through the swing mechanism. The top, close to the inner side of the connecting ring plate, of the connecting ring plate is connected with a waterproof sealing ring, three equally-divided limiting openings are formed in the outer circle face of the connecting ring plate, and the outer circle face of the protective cover plate assembly is connected with cover plate locking mechanisms matched with the limiting openings. The protective cover plate assembly is matched with the swing mechanism, so that the protective cover plate assembly swings and is closed, a limiting screw rod is placed in a limiting opening, and the top of a limiting hand wheel is in close contact with the bottom of a connecting ring plate by rotating the limiting hand wheel, so that the protective cover plate assembly is pressed, and dust on the surface of the protective cover plate assembly is prevented from falling into a pipeline; and meanwhile, the waterproof sealing ring has a certain height, a limiting height is formed for rainwater, and the rainwater is prevented from entering the pipeline.

Description

Technical Field

[0001] The utility model relates to the field of oil exploitation, in particular to a wellhead device used in oil exploitation. Background Art

[0002] Petroleum is a complex mixture of various hydrocarbons, usually in the form of gaseous, liquid and solid hydrocarbons. It has a natural occurrence and is a viscous, dark brown liquid or semi-solid combustible substance. The main components of petroleum include alkanes, cycloalkanes, aromatic hydrocarbons and olefins, etc. The wellhead used in petroleum extraction is an important part of the petroleum extraction process. It refers to the interface between the oil well and the ground facilities. When the corresponding wellhead is not delivering oil, it needs to be closed.

[0003] Among them, the publication number CN217151889U discloses an oil production wellhead equipment, including a wellhead and a pipeline, wherein the wellhead is plugged with a pipeline, and the oil production wellhead equipment comprises: a cleaning member installed on the outside of the pipeline; a shell installed on both sides of the top of the wellhead; and a closing member installed on the inside of the shell; wherein the cleaning member can move up and down on the outside of the pipeline, and the oil production wellhead equipment prevents dust from entering the inside of the pipeline through the coordinated use of the shell, the screw, the turntable bump, the turn block, the cover plate and the slider.

[0004] The above-mentioned prior art has the following defects. When dust adheres to the cover and then moves, the dust on the cover will fall into the pipe, thereby causing pollution to the wellhead. The two cover plates are sliding closed, and there is no sealing structure between the cover plates and the wellhead. The sealing performance is poor, and there are no corresponding sealing gaskets between the cover plates. It is easy for rainwater to enter the wellhead and mix with pollutants such as crude oil and wastewater in the well to form a complex mixture. These mixtures will enter the water body and soil through surface runoff, leakage, etc., causing pollution to the environment. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a wellhead device for oil mining, which improves the sealing performance of the wellhead, prevents dust and rainwater from falling into the wellhead, and reduces environmental pollution.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a wellhead equipment for oil development, including: a pipeline and a connecting ring plate connected to the top thereof, a protective cover plate assembly is arranged above the connecting ring plate, one end of the protective cover plate assembly is connected to a swing mechanism, the protective cover plate assembly and the connecting ring plate are connected through the swing mechanism, a waterproof sealing ring is connected to the top of the connecting ring plate near the inner side thereof, and three equally divided limiting openings are arranged on the outer circumference of the connecting ring plate;

[0007] The outer cylindrical surface of the protective cover assembly is connected to a cover locking mechanism that matches the limit opening, and the cover locking mechanism includes a U-shaped seat, a limit shaft is passed through the U-shaped seat, and a limit screw located on the inner side of the U-shaped seat is mounted on the limit shaft. A limit handwheel is threadedly connected to the limit screw, and when the limit screw is located in the limit opening, the top of the limit handwheel is in contact with the bottom of the connecting ring plate.

[0008] By adopting the above technical solution, the protective cover assembly cooperates with the swing mechanism to make the protective cover assembly swing to prevent dust on its surface from falling into the pipe. At the same time, the waterproof sealing ring has a certain height to form a limit height for rainwater. After closing, the limit screw is placed in the limit port, and the top of the limit screw is brought into close contact with the bottom of the connecting ring plate by turning the limit hand wheel, thereby tightening the protective cover assembly.

[0009] In a preferred example, the utility model can be further configured as follows: the protective cover assembly includes a circular plate, a hemispherical sealing plug body matching the inner side of the connecting ring plate is installed at the bottom of the circular plate, a sealing ring is connected to a circular surface of the hemispherical sealing plug body close to the circular plate, one end of the sealing ring is connected to the circular plate, and the other end is in contact with the waterproof sealing ring.

[0010] By adopting the above technical solution, when the circular plate swings to a horizontal state, the curvature of the surface of the hemispherical sealing plug prevents contact with the inner side of the waterproof sealing ring, thereby stably sealing the inner side of the connecting ring plate, and when the circular plate is pressed, the sealing ring and the waterproof sealing ring are in close contact, thereby further improving the waterproof and dustproof effects.

[0011] In a preferred example, the present invention can be further configured as follows: the top of the circular plate is conical.

[0012] By adopting the above technical solution, the cone-shaped top of the circular plate plays a role in diverting water flow during thunderstorms, preventing water accumulation on the top from flowing into the pipe when the circular plate is opened, thereby further improving the waterproof effect.

[0013] In a preferred example, the utility model can be further configured as follows: a guide ring with a semicircular cross-section is connected to the top of the waterproof sealing ring.

[0014] By adopting the above technical solution, when the hemispherical sealing plug body swings to a horizontal state with the circular plate, its end is about to contact the semicircular guide ring, the sealing ring and the curved surface of the guide ring contact, and when the circular plate is pressed down and closed, the sealing ring undergoes a concave deformation and fits the curvature of the guide ring surface, further improving the sealing performance of the wellhead, thereby preventing dust and rainwater from entering the wellhead and mixing with pollutants such as crude oil and wastewater in the well.

[0015] In summary, the utility model includes at least one of the following beneficial technical effects of wellhead equipment for oil production:

[0016] 1. The protective cover assembly cooperates with the swing mechanism to make the protective cover assembly swing and close, and place the limit screw in the limit port. By turning the limit hand wheel, the top of the cover assembly is in close contact with the bottom of the connecting ring plate, thereby pressing the protective cover assembly to prevent dust on its surface from falling into the pipe. At the same time, the waterproof sealing ring has a certain height to form a limit height for rainwater to prevent rainwater from entering the pipe.

[0017] 2. When the hemispherical sealing plug body swings to a horizontal state with the circular plate, its end is about to contact the semicircular guide ring. The sealing ring contacts the arc surface of the guide ring, and when the circular plate is pressed down and closed, the sealing ring deforms inward and matches the arc of the guide ring surface, further improving the sealing performance of the wellhead, thereby preventing dust and rainwater from entering the wellhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model after being opened.

[0021] In the figure: 1, pipeline; 2, connecting ring plate; 30, protective cover assembly; 40, swing mechanism; 5, waterproof sealing ring; 6, limit opening; 70, cover locking mechanism; 8, guide ring;

[0022] 31. round plate; 32. hemispherical sealing plug body; 33. sealing ring;

[0023] 41. U-shaped mounting seat; 42. waist-shaped opening; 43. pin shaft; 44. connecting plate;

[0024] 71. U-shaped seat; 72. limit shaft; 73. limit screw; 74. limit hand wheel. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0027] Reference Figure 1-2 , a wellhead device for oil mining disclosed in the utility model comprises: a pipeline 1 and a connecting ring plate 2 connected to the top thereof, a protective cover assembly 30 is arranged above the connecting ring plate 2, one end of the protective cover assembly 30 is connected to a swing mechanism 40, the protective cover assembly 30 and the connecting ring plate 2 are connected through the swing mechanism 40, a waterproof sealing ring 5 is connected to the top of the connecting ring plate 2 near the inner side thereof, a guide ring 8 with a semicircular cross section is connected to the top of the waterproof sealing ring 5, three equally divided limiting openings 6 are arranged on the outer circumference of the connecting ring plate 2, a cover locking mechanism 70 matching the limiting opening 6 is connected to the outer circumference of the protective cover assembly 30, the cover locking mechanism 70 comprises a U-shaped seat 71, a limiting shaft 72 is passed through the U-shaped seat 71, and a limiting shaft 72 is sleeved on the limiting shaft 72 and is located inside the U-shaped seat 71 The limit screw 73 is threadedly connected to the limit hand wheel 74. When the limit screw 73 is located in the limit opening 6, the top of the limit hand wheel 74 is in contact with the bottom of the connecting ring plate 2; the swing mechanism 40 is located in the middle position of two of the limit openings 6, and the protective cover assembly 30 realizes the opening and closing of the wellhead under the action of the swing mechanism 40. When the protective cover assembly 30 is closed, the limit screw 73 rotates with the limit shaft 72 to buckle the limit screw 73 into the corresponding limit opening 6. By rotating the limit hand wheel 74, the top of the limit screw 73 is in close contact with the bottom of the connecting ring plate 2, thereby pressing the protective cover assembly 30 to prevent dust on its surface from falling into the pipe 1, and the waterproof sealing ring 5 has a certain height and is closed with the protective cover assembly 30, effectively preventing rainwater from entering the pipe 1.

[0028] The protective cover assembly 30 includes a circular plate 31, the top of which is conical, and the bottom of the circular plate 31 is equipped with a hemispherical sealing plug body 32 that matches the inner side of the connecting ring plate 2, and a sealing ring 33 is connected to the circular surface of the hemispherical sealing plug body 32 close to the circular plate 31, one end of the sealing ring 33 is connected to the circular plate 31, and the other end is in contact with the waterproof sealing ring 5; the top cone of the circular plate 31 plays a role in diverting water flow during thunderstorms to prevent water from accumulating on the top and flowing into the pipe 1 when the circular plate 31 is opened, and when it swings to a horizontal state, the end of the hemispherical sealing plug body 32 is brought into contact with the guide ring 8 with a semicircular cross-section, and the sealing ring 33 contacts the arc surface of the guide ring 8, and when the circular plate 31 is pressed down and closed, the sealing ring 33 undergoes an inward concave deformation, which fits the curvature of the surface of the guide ring 8, further improving the sealing performance of the wellhead, thereby preventing dust and rainwater from entering the wellhead.

[0029] The swing mechanism 40 includes a U-shaped mounting seat 41, and waist-shaped openings 42 are opened on both sides of the U-shaped mounting seat 41. A pin shaft 43 is connected in the waist-shaped opening 42. A connecting plate 44 located on the inner side of the U-shaped mounting seat 41 is mounted on the pin shaft 43, and one end of the connecting plate 44 is connected to the protective cover assembly 30; the connecting plate 44 cooperates with the pin shaft 43 and rotates in the waist-shaped opening 42, thereby driving the protective cover assembly 30 to swing, and when it is locked on the closing limit screw 73, the protective cover assembly 30 drives the connecting plate 44 to move downward a certain distance in the waist-shaped opening 42 to ensure that the protective cover assembly 30 is in a fully closed state, so as to improve the sealing of the protective cover assembly 30.

[0030] The implementation principle of this embodiment is as follows: when in use, the staff cooperates with the connecting plate 44 and the pin shaft 43 to close the circular plate 31, and buckles the limiting screw 73 into the corresponding limiting opening 6, and then rotates the limiting handwheel 74 to make its top and the bottom of the connecting ring plate 2 in close contact, thereby pressing the protective cover assembly 30 to prevent dust on its surface from falling into the pipeline 1. At the same time, the end of the hemispherical sealing plug body 32 contacts the guide ring 8 with a semicircular cross-section, causing the sealing ring 33 to contact the arc surface of the guide ring 8, causing the sealing ring 33 to deform inwardly and match the arc of the guide ring 8 surface, and the circular plate 31 drives the connecting plate 44 to move downward a certain distance in the waist-shaped opening 42 to ensure that the protective cover assembly 30 is in a completely closed state, so that the circular plate 31 protects the wellhead, prevents dust and rainwater from falling into the wellhead, and reduces environmental pollution.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wellhead equipment for oil production, comprising: A pipe (1) and a connecting ring plate (2) connected to the top thereof, characterized in that a protective cover plate assembly (30) is provided above the connecting ring plate (2), one end of the protective cover plate assembly (30) is connected to a swing mechanism (40), the protective cover plate assembly (30) and the connecting ring plate (2) are connected via the swing mechanism (40), a waterproof sealing ring (5) is connected to the top of the connecting ring plate (2) near its inner side, and three equally divided limiting openings (6) are provided on the outer circumferential surface of the connecting ring plate (2); The outer cylindrical surface of the protective cover assembly (30) is connected to a cover locking mechanism (70) that matches the limiting opening (6), and the cover locking mechanism (70) comprises a U-shaped seat (71), a limiting shaft (72) is passed through the U-shaped seat (71), and a limiting screw (73) located on the inner side of the U-shaped seat (71) is mounted on the limiting shaft (72), and a limiting hand wheel (74) is threadedly connected to the limiting screw (73), and when the limiting screw (73) is located in the limiting opening (6), the top of the limiting hand wheel (74) is in contact with the bottom of the connecting ring plate (2).

2. The wellhead equipment for oil production according to claim 1, characterized in that: The protective cover assembly (30) comprises a circular plate (31), the bottom of which is provided with a hemispherical sealing plug body (32) matching the inner side of the connecting ring plate (2), a sealing ring (33) being connected to a circular surface of the hemispherical sealing plug body (32) close to the circular plate (31), one end of the sealing ring (33) being connected to the circular plate (31) and the other end being in contact with the waterproof sealing ring (5).

3. The wellhead equipment for oil production according to claim 1, characterized in that: The swing mechanism (40) comprises a U-shaped mounting seat (41), waist-shaped openings (42) are provided on both sides of the U-shaped mounting seat (41), a pin shaft (43) is connected inside the waist-shaped opening (42), a connecting plate (44) located inside the U-shaped mounting seat (41) is sleeved on the pin shaft (43), and one end of the connecting plate (44) is connected to the protective cover assembly (30).

4. The wellhead equipment for oil production according to claim 2, characterized in that: The top of the circular plate (31) is conical.

5. The wellhead equipment for oil production according to claim 1, characterized in that: The top of the waterproof sealing ring (5) is connected to a guide ring (8) with a semicircular cross section.

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