Pumping unit wellhead hydrogen sulfide treatment device

Abstract

The utility model belongs to the technical field of mechanical oil extraction production, and discloses a pumping unit wellhead hydrogen sulfide treatment device. Comprising a shackle, a connecting rod, a limiting cap and a base which are sequentially arranged from top to bottom. The lower portion of the base is of a hollow cylindrical structure, two non-through rectangular grooves are symmetrically formed in the circumferential wall face of the base in the vertical direction, and the rectangular grooves divide the cylindrical wall face into two parts to form two small semi-cylindrical structures. The cavity of the small semi-cylinder is used for containing activated carbon, the rectangular grooves are spring grooves used for containing springs, a plurality of springs are arranged in each spring groove, one end of each spring is connected with a spring connecting column, facing outwards, of the corresponding rectangular groove, the other end of each spring is arranged on the rectangular face of the corresponding side flow blocking piece, and the front end of each side flow blocking piece is inserted into the corresponding rectangular groove. The tail end extends out of the rectangular groove of the base; a plurality of through holes are formed in the circumferential wall face of the lower portion of the base. The device is simple in structure and convenient to operate, the working convenience is improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical oil production technology, and relates to a hydrogen sulfide treatment device at the wellhead of an oil pumping unit. Background Technology

[0002] During the extraction process, hydrogen sulfide (H2S) from the formation is extracted along with the oil, gas, and water mixture. Hydrogen sulfide (H2S) is a colorless, highly toxic acidic gas, an inorganic compound. At high concentrations, it has no obvious odor; at low concentrations, it has a strong rotten egg smell; and at extremely low concentrations, it has a sulfurous smell. Hydrogen sulfide is slightly denser than air and can accumulate in low-lying areas, creating potentially hazardous zones. Even at low concentrations, it is toxic to humans; inhalation of high concentrations can be rapidly fatal. Hydrogen sulfide is irritating to the eyes, respiratory system, and nervous system; exposure to low concentrations may cause eye irritation, headaches, coughing, and difficulty breathing. Because hydrogen sulfide dissolves in water to form hydrosulfuric acid, which corrodes both metallic and non-metallic materials, desulfurization towers are installed at the station to treat the hydrogen sulfide entering from each well. However, the pipeline from the pumping unit wellhead to the station is not treated for hydrogen sulfide. However, the number of perforations in this pipeline section has been increasing year by year, and these perforations can lead to hydrogen sulfide poisoning, environmental pollution, and other safety and environmental accidents.

[0003] Chinese patent CN204182277U discloses a device for removing hydrogen sulfide from associated gas at wellheads. This device utilizes a gas-breaking plate and quartz sand packing to disperse the gas flow, and baffles to extend the gas-liquid contact time, thereby achieving hydrogen sulfide removal and solving the environmental pollution and explosion safety hazards caused by existing associated gas emissions from wellheads. However, this device cannot handle hydrogen sulfide treatment in the pipeline section from the pumping unit wellhead to the station. Furthermore, its complex structure hinders widespread adoption and subsequent maintenance. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a hydrogen sulfide treatment device for oil pumping unit wellheads. This device has a simple structure, is easy to operate, improves work convenience, and reduces production costs. Through a specific base structure and spring-loaded elastically connected side baffles, once the working position is achieved, the side baffles are pushed open by the springs to prevent gas from escaping from both sides, allowing it to enter the activated carbon through the provided through-holes for absorption and treatment of hydrogen sulfide.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a hydrogen sulfide treatment device for pumping unit wellhead, including a hook, a connecting rod, a limiting cap, and a base arranged sequentially from top to bottom; the upper part of the base is threadedly connected to the lower part of the limiting cap, the lower part of the base is a hollow cylindrical structure with two non-through rectangular grooves symmetrically opened in the vertical direction on its circumferential wall, the rectangular grooves are spring grooves for placing springs, each spring groove is provided with several springs, one end of each spring is connected to a spring connecting post arranged outward of the rectangular groove, and the other end of the spring is set on the rectangular surface of the side baffle plate, the front end of the side baffle plate is inserted into the rectangular groove, and the end extends out of the rectangular groove of the base; several through holes are provided on the lower circumferential wall of the base, and a bottom baffle plate is provided at the bottom of the base; a cavity for placing activated carbon is provided inside the lower part of the base.

[0006] The lower part of the base has a cavity for placing activated carbon. Specifically, a rectangular groove divides the cylindrical wall into two parts, forming two small semi-cylindrical structures. A rectangular channel is provided between the two small semi-cylindrical structures, which connects the cavities of the two small semi-cylindrical structures. The cavities of the small semi-cylindrical structures are used to place activated carbon.

[0007] Preferably, the width of the rectangular surface of the rectangular groove is equal to the length of the rectangular channel.

[0008] Preferably, the side baffle includes a rectangular cross-section, an upper bottom surface, a lower bottom surface, and a curved surface. The rectangular cross-section is located in the middle of the structure and is perpendicular to the upper bottom surface and the lower bottom surface, respectively. The side of the rectangular cross-section is smoothly connected to the curved surface. The upper bottom surface and the lower bottom surface are located at the upper and lower ends of the rectangular cross-section and are connected to the rectangular cross-section and the cylindrical curved surface, respectively, to form a closed three-dimensional structure.

[0009] Furthermore, the base and the bottom baffle are integrally formed or the bottom baffle is welded to the bottom of the base.

[0010] Furthermore, the maximum diameter of the bottom baffle is the same as the maximum diameter of the limiting cap. The bottom of the bottom baffle is arc-shaped.

[0011] Furthermore, the top of the hook is a circular ring structure, and the top is cylindrical. The ring and the cylinder are integrally formed to constitute the hook. The bottom of the cylinder of the hook is threaded, and the hook is threaded to the connecting rod through the thread on the cylinder.

[0012] Furthermore, a groove is provided at the top of the connecting rod, and threads are provided on the inner wall of the groove. The cylindrical bottom of the hook is inserted into the groove and threadedly connected to the connecting rod. Threads are provided on the outer circumference of the bottom of the connecting rod.

[0013] Furthermore, a groove is provided on the top of the limit cap, and a thread is provided on the inner wall of the groove. The bottom of the connecting rod is inserted into the groove and threadedly connected to the limit cap.

[0014] Furthermore, the lower outer periphery of the limiting cap is threaded, the top of the base is grooved, the inner wall of the groove is threaded, and the bottom of the limiting cap is inserted into the groove and threadedly connected to the base. The top of the limiting cap also covers the top surface of the base.

[0015] Furthermore, the diameter of the lower part of the limiting cap is smaller than the diameter of the top surface of the limiting cap.

[0016] The side baffle extending out of the base means that when the device is set up but has not yet entered the work station, in the initial state, the side baffle is located outside the base.

[0017] The advantages of this utility model compared with the prior art are:

[0018] The hydrogen sulfide treatment device at the wellhead of the oil pumping unit provided by this utility model reduces the hydrogen sulfide content at the wellhead, improving the safety factor for employees; extends the corrosion resistance time of metal pipelines, reducing the probability of decreased oil well production rate and ground pollution caused by pipeline perforation, reducing the waste of manpower and production costs for leak repair; and prevents corrosion of metal and non-metal materials, saving replacement costs.

[0019] This utility model provides a hydrogen sulfide treatment device for oil pumping unit wellheads. This device is highly practical and adaptable, as various types of oil pumping units exist in major oilfields, all of which face the problem of hydrogen sulfide treatment at the wellhead. This device features low manufacturing cost, simple structure, convenient operation, and high safety and reliability. Its practicality and adaptability allow for widespread application, meeting the actual production needs of various oilfields within the group company. It has high promotional value, large market demand, and significant application prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the front view of the hydrogen sulfide treatment device at the wellhead of the oil pumping unit according to this utility model.

[0022] Figure 2 This is a perspective view of the hydrogen sulfide treatment device at the wellhead of the oil pumping unit according to this utility model.

[0023] Figure 3 This is a side view of the hydrogen sulfide treatment device at the wellhead of the oil pumping unit according to this utility model.

[0024] Figure 4 yes Figure 3 AA sectional view.

[0025] In the diagram: 1. Hook and loop, 2. Connecting rod, 3. Limiting cap, 4. Base, 5. Side baffle, 6. Bottom baffle, 7. Through hole, 8. Spring groove, 9. Spring, 10. Spring connecting post. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used only for distinction and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] A hydrogen sulfide treatment device at the wellhead of an oil pumping unit, such as Figures 1-4 As shown, the system includes, from top to bottom, a hook 1, a connecting rod 2, a limiting cap 3, and a base 4. The upper part of the base 4 is threadedly connected to the lower part of the limiting cap 3. The lower part of the base 4 is a hollow cylindrical structure with two non-through rectangular grooves symmetrically opened on its circumferential wall in the vertical direction. These rectangular grooves divide the cylindrical wall into two parts, forming two small semi-cylindrical structures. A rectangular channel is provided between the two small semi-cylindrical structures, which connects the cavities of the two small semi-cylindrical structures. The cavities of the small semi-cylindrical structures are used to place activated carbon. The rectangular grooves are spring grooves 8 for placing springs 9. Several springs 9 are set in each spring groove 8. One end of each spring 9 is connected to a spring connecting post 10 set on the outer side of the rectangular groove. The other end of the spring 9 is set on the rectangular surface of the side baffle 5. The front end of the side baffle 5 is inserted into the rectangular groove, and the end extends out of the rectangular groove of the base 4. Several through holes 7 are set on the lower circumferential wall of the base 4, and a bottom baffle 6 is set at the bottom of the base 4.

[0032] The width of the rectangular surface of the rectangular groove is equal to the length of the rectangular channel.

[0033] The side baffle 5 includes a rectangular cross-section, an upper bottom surface, a lower bottom surface, and a curved surface. The rectangular cross-section is located in the middle of the structure and is perpendicular to the upper bottom surface and the lower bottom surface, respectively. The side of the rectangular cross-section is smoothly connected to the curved surface. The upper bottom surface and the lower bottom surface are located at the upper and lower ends of the rectangular cross-section and are connected to the rectangular cross-section and the cylindrical curved surface, respectively, together forming a closed three-dimensional structure.

[0034] The base 4 and the bottom baffle 6 are integrally formed or the bottom baffle 6 is welded to the bottom of the base 4.

[0035] The maximum diameter of the bottom baffle 6 is the same as the maximum diameter of the limiting cap 3.

[0036] The bottom of the bottom baffle plate 6 is arc-shaped.

[0037] The top of the hook ring 1 is a circular ring structure, and the top is cylindrical. The ring and the cylinder are integrally formed to constitute the hook ring 1. The bottom of the cylinder of the hook ring 1 is provided with threads, and the hook ring 1 is threaded to the connecting rod 2 through the threads on the cylinder.

[0038] The top of the connecting rod 2 is provided with a groove, and the inner wall of the groove is provided with threads. The cylindrical bottom of the hook ring 1 is inserted into the groove and threadedly connected to the connecting rod 2. The outer circumference of the bottom of the connecting rod 2 is provided with threads.

[0039] The top of the limit cap 3 is provided with a groove, and the inner wall of the groove is provided with threads. The bottom of the connecting rod 2 is inserted into the groove and threadedly connected to the limit cap 3.

[0040] The lower outer circumference of the limiting cap 3 is threaded, and the top of the base 4 is grooved with threads on the inner wall of the groove. The bottom of the limiting cap 3 is inserted into the groove and threadedly connected to the base 4. The top of the limiting cap 3 covers the top surface of the base 4.

[0041] The diameter of the lower part of the limiting cap 3 is smaller than the diameter of the top surface of the limiting cap 3.

[0042] The side baffle 5 extending out of the base 4 means that when the device is set up but has not yet entered the work station, in the initial state, the side baffle part is located outside the base 4.

[0043] The spring connecting post 10 is preferably cylindrical and is welded to the rectangular surface of the rectangular groove facing outwards.

[0044] Example 2

[0045] The hydrogen sulfide treatment device for pumping unit wellheads provided by this utility model has a 2-inch pipe at the wellhead firing position and a 2.5-inch pipe at the bottom (taking one actual production example; the specific dimensions of the hydrogen sulfide treatment device for pumping unit wellheads can be set according to the working wellhead firing position, and can be set according to the working conditions to meet the requirements of entering the firing position and preventing gas from flowing out from the sides and bottom after the side baffle 5 is pushed open by the spring 9). Therefore, after the hydrogen sulfide treatment device for pumping unit wellheads enters the firing position, the side baffle 5 is pushed open by the spring 9, and the bottom baffle 6 prevents gas from flowing out from the sides and bottom, so that it can only enter the activated carbon chamber through the through hole 7. The activated carbon in the activated carbon chamber absorbs more than 95% of the hydrogen sulfide in the gas, and the treated gas is discharged upward through the top through hole, so as to remove the hydrogen sulfide in the casing gas without changing the wellhead process.

[0046] The hydrogen sulfide treatment device for pumping unit wellheads provided by this utility model has been tested and applied in oil production areas of oilfields since January 2024. Ten sets of this device were applied in the field to oil wells with hydrogen sulfide content exceeding 200 ppm. After using the device, the hydrogen sulfide content at the wellhead was reduced to below 6.5 ppm, the average well drilling time was extended by more than 100 days, the well production rate was improved, the labor intensity of on-site personnel was effectively reduced, and the safety factor of wellhead operation was improved, achieving the goal of improving quality and efficiency. Field application feedback has shown good results and strong practicality. Furthermore, the equipment is simple to install and convenient to use, making it highly valuable for widespread application.

[0047] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model. Although this utility model has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of this utility model. In particular, as long as there is no technical conflict, the features in the embodiments disclosed in this utility model can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hydrogen sulfide treatment device at the wellhead of an oil pumping unit, characterized in that, The system includes a hook (1), a connecting rod (2), a limiting cap (3), and a base (4) arranged sequentially from top to bottom. The upper part of the base (4) is threadedly connected to the lower part of the limiting cap (3). The lower part of the base (4) is a hollow cylindrical structure with two non-through rectangular grooves symmetrically opened in the vertical direction on its circumferential wall. The rectangular grooves are spring grooves (8) for placing springs (9). Several springs (9) are set in each spring groove (8). One end of each spring (9) is connected to a spring connecting post (10) set on the outer side of the rectangular groove. The other end of the spring (9) is set on the rectangular surface of the side baffle (5). The front end of the side baffle (5) is inserted into the rectangular groove, and the end extends out of the rectangular groove of the base (4). Several through holes (7) are set on the lower circumferential wall of the base (4). A bottom baffle (6) is set at the bottom of the base (4). A cavity for placing activated carbon is set inside the lower part of the base (4).

2. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The lower part of the base (4) is provided with a cavity for placing activated carbon. Specifically, a rectangular groove divides the cylindrical wall into two parts to form two small semi-cylindrical structures. A rectangular channel is provided between the two small semi-cylindrical structures, and the cavity of the two small semi-cylindrical structures is connected through the rectangular channel. The cavity of the small semi-cylindrical structures is used to place activated carbon. The upper part of the base (4) is threadedly connected to the lower part of the limiting cap (3).

3. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The base (4) and the bottom baffle (6) are integrally formed or the bottom baffle (6) is welded to the bottom of the base (4).

4. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The bottom of the bottom baffle (6) is arc-shaped.

5. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The top of the hook (1) is a circular ring structure and the top is cylindrical. The ring and the cylinder are integrally formed to form the hook (1). The bottom of the cylinder of the hook (1) is threaded. The hook (1) is threaded to the connecting rod (2) through the thread on the cylinder.

6. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The top of the connecting rod (2) is provided with a groove, and the inner wall of the groove is provided with a thread. The cylindrical bottom of the hook (1) is inserted into the groove and threadedly connected to the connecting rod (2).

7. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The bottom outer circumference of the connecting rod (2) is threaded, the top of the limiting cap (3) is grooved, the inner wall of the groove is threaded, and the bottom of the connecting rod (2) is inserted into the groove and threadedly connected to the limiting cap (3).

8. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The lower outer periphery of the limiting cap (3) is threaded, the top of the base (4) is grooved, the inner wall of the groove is threaded, and the bottom of the limiting cap (3) is inserted into the groove and threadedly connected to the base (4).

9. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The diameter of the lower part of the limiting cap (3) is smaller than the diameter of the top surface of the limiting cap (3).

10. The hydrogen sulfide treatment device at the wellhead of an oil pumping unit as described in claim 1, characterized in that, The maximum diameter of the bottom baffle (6) is the same as the maximum diameter of the limiting cap (3).

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