A drying and cooling device for associated gas in oil fields

Abstract

This utility model discloses an associated gas drying and cooling device for oilfields, including a support platform. A drying box is fixed on the upper surface of the support platform. An inner shell is fixed through and in the middle of the drying box. The bottom end of the inner shell is open. A cooling chamber is formed between the inner wall of the drying box and the outer wall of the inner shell. A second air inlet pipe is fixed to the bottom end of the side wall of the inner shell. The other end of the second air inlet pipe passes through the side wall of the drying box and is fixedly connected to an air-cooling component. An air outlet pipe is fixed to the top wall of the inner shell. A bottom cover is fitted onto the lower surface of the inner shell. In this utility model, a support platform, a drying box, an inner shell, a second air inlet pipe, an air-cooling component, a bottom cover, and a chiller are provided. The associated gas is first cooled by the air-cooling component. After preliminary cooling, the associated gas enters the inner shell. Then, the chiller injects cold water into the cooling chamber between the drying box and the inner shell, thereby further cooling the associated gas and the molecular sieve adsorbent and improving the drying effect.

Description

Technical Field

[0001] This utility model relates to the field of associated gas drying technology in oil fields, and in particular to a cooling device for drying associated gas in oil fields. Background Technology

[0002] An associated gas drying and cooling unit is a specialized device used to process associated natural gas generated during oil and gas field extraction. Its main function is to remove moisture and heavy hydrocarbons from the gas, making it suitable for pipeline transportation or subsequent processing. The unit typically consists of a cooling unit and a drying unit. The cooling unit uses heat exchangers or air coolers to lower the temperature of the associated gas, causing most of the water vapor and heavy hydrocarbons to condense and separate. The drying unit uses adsorbents such as molecular sieves for further dehydration, ensuring the gas dew point meets standards. Some units also integrate a filtration system to remove solid impurities and droplets.

[0003] A search revealed that patent CN222578609U discloses a drying and cooling device for associated gas in oil fields. By setting up a drying mechanism, the molecular sieve adsorbent absorbs the moisture in the associated gas. When the molecular sieve adsorbent needs to be replaced, the motor drives the connecting rod to move the arc-shaped sliding door in the arc-shaped groove, at which point the molecular sieve adsorbent falls into the collection box, thus achieving the effects of drying the associated gas and quickly replacing the molecular sieve adsorbent.

[0004] After prolonged use, the temperature of the molecular sieve adsorbent in the aforementioned device gradually increases. As the temperature rises, its adsorption capacity significantly decreases. The device lacks a structure for partially cooling the molecular sieve adsorbent, leading to poor subsequent drying capabilities and necessitating frequent replacement of the adsorbent. Furthermore, the structure for storing the molecular sieve adsorbent is relatively complex, and adsorbent residue can easily remain inside the drying tube, thus requiring further improvement. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an oilfield associated gas drying and cooling device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an associated gas drying and cooling device for oilfields, comprising a support platform, a drying box fixed on the upper surface of the support platform, an inner shell through and fixed in the middle of the drying box, the bottom end of the inner shell being open, a cooling chamber formed between the inner wall of the drying box and the outer wall of the inner shell, a second air inlet pipe fixed at the bottom end of the side wall of the inner shell, the other end of the second air inlet pipe passing through the side wall of the drying box and fixedly connected to an air-cooling component, an air outlet pipe fixed on the top wall of the inner shell, a bottom cover fitted to the lower surface of the inner shell, an electric telescopic rod for driving the bottom cover to rise and fall fixed on the top of the inner shell, a chiller installed on the upper surface of the support platform, and the chiller communicating with the interior of the cooling chamber, the interior of the inner shell being filled with molecular sieve adsorbent.

[0007] Furthermore, the air-cooling assembly includes two vertical boxes, and several branch pipes are fixedly connected between the two vertical boxes. The second air intake pipe is connected to one of the vertical boxes, and the first air intake pipe is fixed to the side wall of the other vertical box. The air-cooling assembly also includes a fan located on one side of the several branch pipes, and a mesh is fixed to one end of the second air intake pipe at the inner shell.

[0008] Furthermore, a filter is fixed in the middle of the first air intake pipe.

[0009] Furthermore, the bottom telescopic end of the electric telescopic rod extends into the inner shell and is fixedly connected to a connecting rod. The bottom end of the connecting rod is fixedly connected to the upper surface of the bottom cover. The upper surface of the bottom cover has an arc design. The support platform is located at the bottom of the drying oven and has a discharge port.

[0010] Furthermore, a sealing ring is fixed to the side of the upper surface of the bottom cover, and the sealing ring is in contact with the lower surface of the inner shell.

[0011] Furthermore, the inner shell has a feeding port on its top wall, and a sealing cap is connected to the top of the feeding port by a threaded rotation.

[0012] Furthermore, the water outlet and water inlet of the chiller are respectively fixed with a water injection pipe and a water return pipe, and the water injection pipe and the water return pipe are respectively connected to the bottom and top of the cooling chamber.

[0013] The beneficial effects of this utility model are:

[0014] 1. In use, this utility model is an oilfield associated gas drying and cooling device, which includes a support platform, a drying box, an inner shell, a second air inlet pipe, an air-cooling component, a bottom cover, and a chiller. The associated gas is first cooled by the air-cooling component, and after preliminary cooling, the associated gas enters the inner shell. Then, the chiller injects cold water into the cooling chamber between the drying box and the inner shell, thereby further cooling the associated gas and the molecular sieve adsorbent and improving the drying effect.

[0015] 2. When in use, this utility model is an oilfield associated gas drying and cooling device, which includes a drying box, an inner shell, a bottom cover, an electric telescopic rod, and a connecting rod. When the electric telescopic rod extends, it causes the bottom cover of the connecting rod to descend. After the bottom cover separates from the bottom of the drying box, the molecular sieve adsorbent in the inner shell is automatically discharged, which facilitates the replacement of the molecular sieve adsorbent. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 : Overall sectional view of this utility model;

[0018] Figure 2 Partial perspective view of this utility model;

[0019] Figure 3 The present utility model Figure 1 Enlarged view of point A in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Support platform; 101. Feeding port; 2. Drying oven; 21. Cooling chamber; 3. Inner shell; 4. Second air inlet pipe; 5. Air outlet pipe; 6. Bottom cover; 61. Sealing ring; 7. Air-cooled assembly; 71. Vertical box; 72. Branch pipe; 73. First air inlet pipe; 74. Fan; 75. Filter; 8. Electric telescopic rod; 9. Connecting rod; 10. Feeding port; 11. Chiller; 111. Water injection pipe; 112. Water return pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-3As shown, an oilfield associated gas drying and cooling device is disclosed, comprising a support platform 1, a drying chamber 2 fixed on the upper surface of the support platform 1, an inner shell 3 through and fixed in the middle of the drying chamber 2, the bottom end of the inner shell 3 being open, a cooling chamber 21 being formed between the inner wall of the drying chamber 2 and the outer wall of the inner shell 3, a second air inlet pipe 4 fixed at the bottom end of the side wall of the inner shell 3, the other end of the second air inlet pipe 4 passing through the side wall of the drying chamber 2 and fixedly connected to an air-cooling component 7, an air outlet pipe 5 fixed on the top wall of the inner shell 3, a bottom cover 6 fitted to the lower surface of the inner shell 3, an electric telescopic rod 8 for driving the bottom cover 6 to rise and fall fixed on the top of the inner shell 3, a chiller 11 installed on the upper surface of the support platform 1, and the chiller 11 communicating with the interior of the cooling chamber 21, and the interior of the inner shell 3 being filled with molecular sieve adsorbent.

[0024] The air-cooled assembly 7 includes two vertical boxes 71, and several branch pipes 72 are fixedly connected between the two vertical boxes 71. The second air intake pipe 4 is connected to one of the vertical boxes 71, and the first air intake pipe 73 is fixed to the side wall of the other vertical box 71. The air-cooled assembly 7 also includes a fan 74 located on one side of the several branch pipes 72. The second air intake pipe 4 is fixed to a mesh at one end of the inner shell 3.

[0025] In this embodiment, the first air inlet pipe 73 is connected to the associated gas pipeline. The associated petroleum gas enters the left vertical box 71 along the first air inlet pipe 73, and then flows into several branch pipes 72. During the process of entering the branch pipes 72, it is cooled by the fan 74. The branch pipes 72 can increase the heat dissipation area, thereby realizing the cooling of the associated gas. The cooled associated gas converges from the right vertical box 71 to the second air inlet pipe 4, and then enters the inner shell 3. The associated gas is dried by the molecular sieve adsorbent in the inner shell 3 and then discharged from the air outlet pipe 5.

[0026] A filter 75 is fixed in the middle of the first air intake pipe 73.

[0027] The filter 75 consists of a housing and a filter screen. When the associated gas enters the first intake pipe 73, it is first filtered by the filter 75 to remove particulate impurities.

[0028] The bottom telescopic end of the electric telescopic rod 8 extends into the inner shell 3 and is fixedly connected to the connecting rod 9. The bottom end of the connecting rod 9 is fixedly connected to the upper surface of the bottom cover 6. The upper surface of the bottom cover 6 is designed with an arc surface. The support platform 1 is located at the bottom of the drying oven 2 and has a discharge port 101.

[0029] The electric telescopic rod 8 extends and retracts, causing the bottom cover 6 to rise and fall. When the bottom cover 6 descends and separates from the lower surface of the inner shell 3, the molecular sieve adsorbent inside the inner shell 3 can be discharged from the bottom of the inner shell 3. Furthermore, because the upper surface of the bottom cover 6 is curved, the molecular sieve adsorbent will not remain on the upper surface of the bottom cover 6. At this time, the molecular sieve adsorbent can be caught at the bottom of the discharge port 101.

[0030] A sealing ring 61 is fixed to the side of the upper surface of the bottom cover 6, and the sealing ring 61 is in contact with the lower surface of the inner shell 3.

[0031] The sealing ring 61 can increase the sealing between the bottom cover 6 and the inner shell 3.

[0032] The inner shell 3 has a feeding port 10 on its top wall, and the top of the feeding port 10 is connected to a sealing cap by a threaded rotation.

[0033] Molecular sieve adsorbent can be easily added to the inner shell 3 through the feed port 10.

[0034] The water outlet and water inlet of the chiller 11 are respectively fixed with a water injection pipe 111 and a water return pipe 112, which are connected to the bottom and top of the cooling chamber 21 respectively.

[0035] Cooling water can be circulated into the cooling chamber 21 by the chiller 11, thereby cooling the associated gas entering the inner shell 3 and the molecular sieve adsorbent located in the inner shell 3, and improving the drying effect of the molecular sieve adsorbent.

[0036] In this embodiment, a controller (not shown in the figure) is also provided on the surface of the support platform 1. This controller can be a Siemens SIMATIC KP1200 series (HMI+PLC integrated machine) KP1212Basic PN (6AV2123-2GB03-0AX0) controller with integrated screen, which controls the operation of the electric telescopic rod 8. The fan 74 and the chiller 11 are controlled by their own switches.

[0037] Working principle: The associated gas enters through the first inlet pipe 73, and is cooled by the fan 74 as it passes through several branch pipes 72. The cooled associated gas enters the inner shell 3 and is dried by the molecular sieve adsorbent. The dried associated gas is discharged through the outlet pipe 5. During this process, the chiller 11 continuously injects cooling water into the cooling chamber 21, thereby cooling the associated gas entering the inner shell 3 and the molecular sieve adsorbent located in the inner shell 3, and improving the drying effect of the molecular sieve adsorbent.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An oilfield associated gas drying and cooling apparatus comprising a support table (1), characterized in that: A drying chamber (2) is fixed on the upper surface of the support platform (1). An inner shell (3) is fixed through the middle of the drying chamber (2). The bottom of the inner shell (3) is open. A cooling chamber (21) is formed between the inner wall of the drying chamber (2) and the outer wall of the inner shell (3). A second air inlet pipe (4) is fixed at the bottom of the side wall of the inner shell (3). The other end of the second air inlet pipe (4) passes through the side wall of the drying chamber (2) and is fixedly connected to an air-cooling component (7). An air outlet pipe (5) is fixed on the top wall of the inner shell (3). A bottom cover (6) is fitted on the lower surface of the inner shell (3). An electric telescopic rod (8) for driving the bottom cover (6) to rise and fall is fixed on the top of the inner shell (3). A chiller (11) is installed on the upper surface of the support platform (1). The chiller (11) is connected to the interior of the cooling chamber (21). The interior of the inner shell (3) is filled with molecular sieve adsorbent.

2. An oilfield associated gas drying and cooling apparatus according to claim 1, characterized in that: The air-cooled assembly (7) includes two vertical boxes (71), and several branch pipes (72) are fixedly connected between the two vertical boxes (71). The second air inlet pipe (4) is connected to one of the vertical boxes (71), and the side wall of the other vertical box (71) is fixed with a first air inlet pipe (73). The air-cooled assembly (7) also includes a fan (74) located on one side of the several branch pipes (72). The second air inlet pipe (4) is fixed with a mesh at one end of the inner shell (3).

3. An oilfield associated gas drying and cooling apparatus according to claim 2, characterised in that: A filter (75) is fixed in the middle of the first air intake pipe (73).

4. The oilfield gas drying and cooling device of claim 1, wherein: The bottom telescopic end of the electric telescopic rod (8) extends into the inner shell (3) and is fixedly connected to a connecting rod (9). The bottom end of the connecting rod (9) is fixedly connected to the upper surface of the bottom cover (6). The upper surface of the bottom cover (6) is arc-shaped. The support platform (1) is located at the bottom of the drying oven (2) and has a discharge port (101).

5. The oilfield gas drying and cooling unit of claim 1, wherein: A sealing ring (61) is fixed on the side of the upper surface of the bottom cover (6), and the sealing ring (61) is in contact with the lower surface of the inner shell (3).

6. The oilfield gas drying and cooling unit of claim 1, wherein: The inner shell (3) has a feeding port (10) on its top wall, and the top of the feeding port (10) is connected to a sealing cap by a threaded rotation.

7. The oilfield associated gas drying and cooling device according to claim 1, characterized in that: The water outlet and water inlet of the chiller (11) are respectively fixed with a water injection pipe (111) and a water return pipe (112), and the water injection pipe (111) and the water return pipe (112) are respectively connected to the bottom and top of the cooling chamber (21).

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