Oil well associated gas drying device

Abstract

This utility model discloses an associated gas drying device for oil wells, comprising a cylindrical shell with a solid adsorption layer in the middle of the shell's inner cavity. Circular perforated plates are installed at the top and bottom of the solid adsorption layer. A main shaft is located at the center of the bottom of the shell's inner cavity, and is fixedly connected to the two perforated plates. The bottom end of the main shaft is connected to a stepper motor via a coupling. A sleeve passes through the main shaft, and two lower partitions are fixedly connected to both sides of the sleeve. The two lower partitions divide the bottom of the shell's inner cavity into symmetrically arranged associated gas distribution chambers and humid air accumulation chambers. An upper partition is fixedly installed at the top of the shell's inner cavity, dividing the top of the shell's inner cavity into symmetrically arranged associated gas accumulation chambers and hot air distribution chambers. The associated gas drying device for oil wells provided by this utility model can achieve continuous production, ensure stable gas supply, and avoid pressure fluctuations or temporary interruptions due to bed switching.

Description

Technical Field

[0001] This utility model relates to an associated gas drying device for oil wells, belonging to the field of oil and gas treatment technology. Background Technology

[0002] Associated gas drying is a crucial step in oil and gas field surface treatment processes. Its purpose is to remove water vapor from the associated gas, lowering its dew point to meet the requirements for subsequent processing, transportation, or use. This is primarily to prevent hydrate blockage, inhibit corrosion, ensure accurate metering, and meet downstream process requirements.

[0003] Currently, commonly used methods for drying associated gas in oil wells are mainly divided into three categories: solvent absorption method, solid desiccant adsorption method, and low temperature method.

[0004] The principle of solid desiccant adsorption is to pass wet gas through a fixed bed filled with solid adsorbent. The huge surface area and microporous structure of the desiccant capture water molecules through physical adsorption. When the bed is saturated, it is switched to another bed to continue drying. The saturated bed is then circulated with high-temperature gas to desorb the adsorbed water and regenerate the desiccant.

[0005] When using solid desiccant adsorption to treat associated gas, once the bed is saturated, it is necessary to switch to another bed to continue drying. During the bed switching, airflow disturbances occur, leading to pressure fluctuations or brief interruptions, which affects the continuous stability of the gas supply.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] This invention addresses the shortcomings of the prior art by providing an associated gas drying device for oil wells, which can achieve continuous production, ensure gas supply stability, and avoid pressure fluctuations or brief interruptions due to bed switching.

[0008] To solve the above technical problems, the present invention adopts the following technical solution:

[0009] An associated gas drying device for oil wells includes a cylindrical shell with a solid adsorption layer in the middle of the shell's inner cavity. Circular perforated plates are installed at the top and bottom of the solid adsorption layer. A main shaft is located at the middle of the bottom of the shell's inner cavity and is fixedly connected to the two perforated plates. The bottom end of the main shaft is connected to a stepper motor via a coupling. A sleeve passes through the main shaft, and two lower partitions are fixedly connected to both sides of the sleeve. The two lower partitions divide the bottom of the shell's inner cavity into symmetrically arranged associated gas distribution chambers and humid air accumulation chambers. An upper partition is fixedly installed at the top of the shell's inner cavity, dividing the top of the shell's inner cavity into symmetrically arranged associated gas accumulation chambers and hot air distribution chambers.

[0010] Furthermore, the associated gas accumulation chamber is located directly above the associated gas distribution chamber.

[0011] Furthermore, the hot air distribution chamber is located directly above the humid air accumulation chamber.

[0012] Furthermore, the top of the lower partition is slidably connected to the perforated plate at the bottom of the solid adsorption layer.

[0013] Furthermore, the bottom end of the upper partition is slidably connected to the perforated plate at the top of the solid adsorption layer.

[0014] Furthermore, the bottom end of the sleeve is fixed to the bottom of the inner cavity of the housing, and the main shaft rotates inside the sleeve.

[0015] Furthermore, the bottom of the associated gas distribution chamber is connected to the associated gas inlet pipe, and a gas delivery pump is installed on the associated gas inlet pipe.

[0016] Furthermore, the top of the associated gas accumulation cavity is connected to the associated gas outlet pipe.

[0017] Furthermore, the top of the hot air distribution cavity is connected to an air inlet pipe, on which a gas delivery pump and an electric heater are installed.

[0018] Furthermore, the bottom of the humid air gathering cavity is connected to the humid air outlet pipe.

[0019] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0020] In this invention, a stepper motor drives the solid adsorption layer and the perforated plate to rotate slowly. During the rotation, the accompanying gas passes through the left side of the solid adsorption layer from bottom to top to achieve drying, while hot air passes through the right side of the solid adsorption layer from top to bottom to desorb the moisture and regenerate it.

[0021] This invention utilizes a lower partition to divide the bottom of the inner cavity of the shell into an associated gas distribution chamber and a humid air collection chamber, and uses an upper partition to divide the top of the inner cavity of the shell into an associated gas collection chamber and a hot air distribution chamber. This ensures that the capture and desorption routes of water molecules do not interfere with each other, achieving continuous, stable, and reliable drying of associated gas and avoiding pressure fluctuations or brief interruptions caused by bed switching.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section at point AA;

[0025] Figure 3 This is a schematic diagram of the gas flow in the usage state of this utility model.

[0026] In the figure, 1-shell, 2-solid adsorption layer, 3-perforated plate, 4-main shaft, 5-stepper motor, 6-lower partition, 7-sleeve, 8-upper partition, 9-associated gas distribution chamber, 10-humid air collection chamber, 11-associated gas collection chamber, 12-hot air distribution chamber, 13-associated gas inlet pipe, 14-associated gas outlet pipe, 15-air inlet pipe, 16-electric heater, 17-humid air outlet pipe. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown in the diagram, this utility model provides an oil well associated gas drying device, including a cylindrical shell 1. A solid adsorption layer 2 is disposed in the middle of the inner cavity of the shell 1. Circular perforated plates 3 are installed at the top and bottom of the solid adsorption layer 2. A main shaft 4 is disposed at the middle of the bottom of the inner cavity of the shell 1. The main shaft 4 is fixedly connected to the two perforated plates 3, and the bottom end of the main shaft 4 is connected to a stepper motor 5 through a coupling. The stepper motor 5 provides power for the slow rotation of the solid adsorption layer 2 and the perforated plates 3.

[0029] The perforated plate 3 can serve both as a mounting plate for the solid adsorption layer 2 and as a gas distribution plate.

[0030] A sleeve 7 is installed on the main shaft 4. The bottom end of the sleeve 7 is fixed to the bottom of the inner cavity of the housing 1. The main shaft 4 rotates inside the sleeve 7. Two lower partitions 6 are fixedly connected to both sides of the sleeve 7. The lower partitions 6 are fixedly connected to the inner wall of the housing 1. The two lower partitions 6 divide the bottom of the inner cavity of the housing 1 into a symmetrically arranged associated gas distribution cavity 9 and a humid air gathering cavity 10.

[0031] An upper partition 8 is fixedly installed on the top of the inner cavity of the housing 1. The upper partition 8 divides the top of the inner cavity of the housing 1 into a symmetrically arranged associated gas gathering chamber 11 and a hot air distribution chamber 12. The associated gas gathering chamber 11 is located directly above the associated gas distribution chamber 9, and the hot air distribution chamber 12 is located directly above the humid air gathering chamber 10.

[0032] The top end of the lower partition 6 is slidably connected to the perforated plate 3 at the bottom of the solid adsorption layer 2, and the bottom end of the upper partition 8 is slidably connected to the perforated plate 3 at the top of the solid adsorption layer 2.

[0033] The bottom of the associated gas distribution chamber 9 is connected to the associated gas inlet pipe 13, and a gas delivery pump is installed on the associated gas inlet pipe 13. The gas delivery pump delivers associated gas from the oil well to the associated gas distribution chamber 9.

[0034] The top of the associated gas gathering cavity 11 is connected to the associated gas outlet pipe 14.

[0035] The top of the hot air distribution chamber 12 is connected to an air inlet pipe 15, on which a gas delivery pump and an electric heater 16 are installed. The gas delivery pump delivers air to the electric heater 16 for heating, and the heated air then enters the hot air distribution chamber 12.

[0036] The bottom of the humid air gathering cavity 10 is connected to the humid air outlet pipe 17, which outputs the moisture desorbed from the solid adsorption layer 2.

[0037] The specific working principle of this utility model is as follows:

[0038] Stepper motor 5 drives solid adsorption layer 2 and perforated plate 3 to rotate slowly; during the rotation, associated gas enters associated gas distribution chamber 9 and passes through the left side of solid adsorption layer 2 from bottom to top. Solid adsorption layer 2 uses its huge surface area and microporous structure to capture water molecules through physical adsorption. The dried associated gas enters associated gas collection chamber 11 and is then output; hot air enters hot air distribution chamber 12 and passes through the right side of solid adsorption layer 2 from top to bottom. The hot air desorbs the water adsorbed by solid adsorption layer 2, regenerating it. The desorbed humid air enters humid air collection chamber 10 and is then output.

[0039] This invention utilizes a lower partition 6 to divide the bottom of the inner cavity of the shell 1 into an associated gas distribution cavity 9 and a humid air collection cavity 10, and uses an upper partition 8 to divide the top of the inner cavity of the shell 1 into an associated gas collection cavity 11 and a hot air distribution cavity 12, so that the capture route and desorption route of water molecules do not interfere with each other, thus achieving continuous, stable and reliable drying treatment of associated gas.

[0040] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. An oil well associated gas drying device, characterized by: The shell (1) includes a cylindrical structure. A solid adsorption layer (2) is provided in the middle of the inner cavity of the shell (1). A circular perforated plate (3) is installed at the top and bottom of the solid adsorption layer (2). A main shaft (4) is provided at the middle position of the bottom of the inner cavity of the shell (1). The main shaft (4) is fixedly connected to the two perforated plates (3). The bottom end of the main shaft (4) is connected to a stepper motor (5) through a coupling. A sleeve (7) is provided on the main shaft (4). Two lower partitions (6) are fixedly connected on both sides of the sleeve (7). The two lower partitions (6) divide the bottom of the inner cavity of the shell (1) into a symmetrically arranged associated gas distribution cavity (9) and a humid air gathering cavity (10). An upper partition (8) is fixedly installed at the top of the inner cavity of the shell (1). The upper partition (8) divides the top of the inner cavity of the shell (1) into a symmetrically arranged associated gas gathering cavity (11) and a hot air distribution cavity (12).

2. The oil well associated gas drying device of claim 1, wherein: The associated gas accumulation cavity (11) is located directly above the associated gas distribution cavity (9).

3. The oil well gas drying unit of claim 2, wherein: The hot air distribution cavity (12) is located directly above the humid air gathering cavity (10).

4. The oil well gas drying unit of claim 1, wherein: The top of the lower partition (6) is slidably connected to the perforated plate (3) at the bottom of the solid adsorption layer (2).

5. The oil well gas drying unit of claim 4, wherein: The bottom end of the upper partition (8) is slidably connected to the perforated plate (3) at the top of the solid adsorption layer (2).

6. The associated gas drying device for oil wells as described in claim 1, characterized in that: The bottom end of the sleeve (7) is fixed to the bottom of the inner cavity of the housing (1), and the main shaft (4) rotates inside the sleeve (7).

7. The oil well associated gas drying device as described in claim 1, characterized in that: The bottom of the associated gas distribution chamber (9) is connected to the associated gas inlet pipe (13), and a gas delivery pump is installed on the associated gas inlet pipe (13).

8. The associated gas drying device for oil wells as described in claim 1, characterized in that: The top of the associated gas gathering chamber (11) is connected to the associated gas outlet pipe (14).

9. The oil well associated gas drying device as described in claim 1, characterized in that: The top of the hot air distribution cavity (12) is connected to the air inlet pipe (15), and a gas delivery pump and an electric heater (16) are installed on the air inlet pipe (15).

10. The associated gas drying device for oil wells as described in claim 1, characterized in that: The bottom of the humid air gathering cavity (10) is connected to the humid air outlet pipe (17).

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