Drainage gas recovery structure for natural gas exploitation

Abstract

The utility model discloses a drainage gas recovery structure for natural gas exploitation, which comprises a delivery pipe used for connecting external gas-liquid separation equipment and an external suction pump, a filter baffle is arranged in the delivery pipe, a plurality of filter holes are uniformly formed in the side surface of the filter baffle, the lower side of the delivery pipe is communicated with an impurity discharge pipe, and the impurity discharge pipe is communicated with the filter baffle. The impurity discharging pipe is arranged close to the filtering baffle, and the impurity discharging pipe and the filtering baffle are sequentially arranged in the gas-liquid conveying direction in the conveying pipe; a valve I is arranged on the upper portion of the impurity discharging pipe, an impurity discharging opening is formed in the bottom of the impurity discharging pipe, and a valve II is arranged on the upper side, close to the impurity discharging opening, of the impurity discharging pipe. When filtered solid impurities need to be cleaned, the valve I is closed firstly, the impurity discharging pipe and the conveying pipe are separated, then the valve II is opened, and a gas-liquid-solid mixture in the impurity discharging pipe is discharged through the impurity discharging opening, so that the working efficiency is greatly improved, potential safety hazards are eliminated, the operation safety is improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral exploitation, in particular to a drainage and gas production structure for natural gas exploitation. Background Art

[0002] The extracted natural gas usually contains a large amount of oil, water and solid impurities, which will affect the purity and quality of natural gas, and further affect its subsequent processing and use. Through separation, the purity of natural gas can be improved to meet the requirements of transportation, processing and final use, prevent corrosion of pipelines and equipment, and reduce pollution to the environment.

[0003] The solid impurities in the mined gas-liquid mixture need to be filtered to avoid adverse effects or even damage to the gas-liquid separation equipment when they enter it. The Chinese utility model patent with application number 202323081633.3 discloses a drainage and gas production device for natural gas extraction. The device closes the first valve and then moves one of the filter frames out of the placement chamber, so that it is convenient for the staff to clean the filtered impurities. At the same time, the other filter plate can still work during the cleaning, so that the impurities in the two filter frames can be cleaned alternately without stopping, so as to maintain the normal operation of the device. The utility model patent has the following defects: when cleaning the impurities, the staff needs to operate on site, the operation process is cumbersome, the work efficiency is low, and because the operation is performed during the drainage and gas extraction filtration process, it is easy to cause safety accidents, the safety of use is low, and it is not practical. To this end, we propose a drainage and gas production structure for natural gas extraction. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a drainage and gas production structure for natural gas development, which can realize remote automatic operation and does not require on-site manual operation by staff, greatly improving work efficiency, eliminating safety hazards, and enhancing operational safety. It is highly practical and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a natural gas exploitation structure using drainage, including a delivery pipe for connecting an external gas-liquid separation device and an external suction pump, a filter baffle is arranged inside the delivery pipe, a plurality of filter holes are evenly arranged on the side surface of the filter baffle, a drainage pipe is arranged on the lower side of the delivery pipe, the drainage pipe is arranged near the filter baffle, and the drainage pipe and the filter baffle are arranged in sequence along the gas-liquid delivery direction in the delivery pipe; a valve I is arranged on the upper part of the drainage pipe, a drainage port is arranged at the bottom of the drainage pipe, and a valve II is arranged on the upper side of the drainage pipe near the drainage port.

[0006] As a preferred technical solution of the utility model, the filter baffle is arranged obliquely on the inner side of the conveying pipe, and the filter baffle is arranged obliquely downward along the gas-liquid conveying direction, with its inclined surface facing the impurity discharge pipe.

[0007] As a preferred technical solution of the utility model, the filter baffle, the impurity discharge pipe, the valve I, the impurity discharge port and the valve II are provided with at least two groups, and the apertures of the filter holes on at least two filter baffles decrease successively along the gas-liquid conveying direction.

[0008] As a preferred technical solution of the utility model, an inclined portion is provided at the lower part of the impurity discharge pipe, and the inclined portion is inclined downward toward the axial direction of the impurity discharge pipe.

[0009] As a preferred technical solution of the utility model, two transparent observation windows are symmetrically arranged on the impurity discharge pipe.

[0010] As a preferred technical solution of the utility model, a plurality of infrared signal transmitters are evenly arranged on the outer surface of one of the observation windows from top to bottom, and a plurality of infrared signal receivers corresponding to the infrared signal transmitters are evenly arranged on the outer surface of the other observation window from top to bottom.

[0011] As a preferred technical solution of the utility model, connecting flanges are respectively provided at both ends of the delivery pipe.

[0012] Compared with the prior art, the utility model has the following beneficial effects: a downward impurity discharge pipe is arranged at the filter baffle of the conveying pipe, and the gas-liquid mixture in natural gas extraction is conveyed to the external gas-liquid separation equipment through the conveying pipe under the action of the external suction pump, and the filter baffle filters and blocks the solid impurities in the gas-liquid mixture at the front side, and the filtered solid impurities gradually fall downward into the impurity discharge pipe under the action of gravity, and then settle to the normally closed valve II after passing through the normally open valve I, and the filtered gas and liquid continue to be conveyed to the gas-liquid separation equipment through the filter holes; when it is necessary to clean the filtered solid impurities, first close valve I to separate the impurity discharge pipe and the conveying pipe, and then open valve II to discharge the gas-liquid solid mixture in the impurity discharge pipe through the impurity discharge port, and the entire cleaning process does not require shutdown, and valves I and II are both electrically controlled valves, which can realize remote automatic operation and do not require on-site manual operation by staff, which greatly improves work efficiency, eliminates safety hazards, improves operational safety, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is an enlarged view of the structure at A of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the filter baffle of the utility model.

[0016] In the figure: 1 delivery pipe, 2 filter baffle, 3 filter hole, 4 row of miscellaneous pipes, 5 valve I, 6 row of miscellaneous ports, 7 valve II, 8 inclined portion, 9 observation window, 10 infrared signal transmitter, 11 infrared signal receiver, 12 connecting flange. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a drainage gas production structure for natural gas exploitation, including a delivery pipe 1 for connecting an external gas-liquid separation device and an external suction pump. The gas-liquid mixture in natural gas exploitation is transported to the external gas-liquid separation device through the delivery pipe 1 under the action of the external suction pump. A filter baffle 2 is arranged inside the delivery pipe 1, and a plurality of filter holes 3 are evenly arranged on the side surface of the filter baffle 2 for filtering solid matter in the gas-liquid mixture to prevent solid impurities from entering the gas-liquid separation device and causing internal blockage thereof, thereby affecting its use.

[0019] A discharge pipe 4 is provided at the lower side of the conveying pipe 1. The discharge pipe 4 is provided near the filter baffle 2, and the discharge pipe 4 and the filter baffle 2 are sequentially provided along the gas-liquid conveying direction in the conveying pipe 1. A valve Ⅰ5 is provided at the upper part of the discharge pipe 4, a discharge port 6 is provided at the bottom of the discharge pipe 4, and a valve Ⅱ7 is provided on the upper side of the discharge pipe 4 near the discharge port 6. A downward discharge pipe 4 is provided at the filter baffle 2 of the conveying pipe 1. The filter baffle 2 filters and blocks solid impurities in the gas-liquid mixture at the front side. The filtered solid impurities gradually fall downward into the discharge pipe 4 under the action of gravity, pass through the normally open valve Ⅰ5, and then settle to the normally closed valve Ⅱ7. The filtered gas and liquid continue to be transported to the gas-liquid separation equipment through the filter hole 3.

[0020] When it is necessary to clean the filtered solid impurities, first close valve I5 to isolate the discharge pipe 4 and the conveying pipe 1, and then open valve II7 to discharge the gas-liquid-solid mixture in the discharge pipe 4 through the discharge port 6. The entire cleaning process does not require shutdown. Both valves I5 and II7 are electrically controlled valves, which can realize remote automatic operation and do not require on-site manual operation by staff, which greatly improves work efficiency, eliminates safety hazards, improves operational safety, and is highly practical.

[0021] The valve I5 and the valve II7 can be commonly used electric butterfly valves, electric ball valves or electric seat valves, etc., preferably electric gate valves.

[0022] The preferred technical solution is that the filter baffle 2 is tiltedly arranged on the inner side of the conveying pipe 1, and the filter baffle 2 is tilted downward along the gas-liquid conveying direction, and its inclined surface faces the impurity discharge pipe 4. The inclined setting of the filter baffle 2 can increase its filtering surface, thereby increasing the number of filter holes and achieving better filtering effect. At the same time, the tilted filter baffle 2 can enable the solid impurities blocked by it to move downward along its inclined surface, and finally enter the impurity discharge pipe 4 more smoothly.

[0023] A further preferred technical solution is that the filter baffle 2, the impurity discharge pipe 4, the valve I 5, the impurity discharge port 6 and the valve II 7 are provided with at least two groups, and the apertures of the filter holes 3 on at least two filter baffles 2 decrease successively along the gas-liquid conveying direction. By arranging multiple filter baffles 2, the gas-liquid mixture can be separated in multiple stages, which further improves the filtering effect and prevents fine impurities from affecting the gas-liquid separation process and purity of natural gas.

[0024] An optional technical solution is that an inclined portion 8 is provided at the lower portion of the impurity discharge pipe 4, and the inclined portion 8 is inclined downward toward the axial direction of the impurity discharge pipe 4, that is, the inclined portion 8 is a section of an inverted cone-shaped pipe, which is provided on the upper side of the impurity discharge port 6. The pipe diameter at the impurity discharge port 6 is smaller, so that the amount of solid impurities that can accumulate above the impurity discharge port 6 is reduced. During impurity discharge, the solid impurities accumulated in the impurity discharge pipe 4 are more easily discharged to the outside through the impurity discharge port 6.

[0025] According to a preferred technical solution, connecting flanges 12 are respectively provided at both ends of the delivery pipe 1 , and the delivery pipe 1 is connected to an external gas-liquid separation device and an external suction pipeline through the two connecting flanges 12 .

[0026] An optional technical solution is that two transparent observation windows 9 are symmetrically arranged on the impurity removal pipe 4, and the staff can check the accumulation of solid impurities in the impurity removal pipe 4 through the observation windows 9, so as to decide whether to perform impurity removal operation according to the amount of solid impurities, and at the same time, it can also avoid the influence of too much solid impurities on discharge.

[0027] Further optionally, a plurality of infrared signal transmitters 10 are evenly arranged on the outer surface of one of the observation windows 9 from top to bottom, and a plurality of infrared signal receivers 11 corresponding to the infrared signal transmitters 10 are evenly arranged on the outer surface of the other observation window 9 from top to bottom. Valve I5 and valve II7, infrared signal transmitter 10 and infrared signal receiver 11, etc. are all electrically connected to an external controller. The external controller can be a commonly used PLC controller or a microprocessor such as a single-chip microcomputer, such as a Mitsubishi FX2N series PLC controller. The valves I5 and valve II7, infrared signal transmitter 10 and infrared signal receiver 11 and controller used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles and circuit connections are all well-known technologies and will not be described in detail herein.

[0028] The amount of solid impurities accumulated in the impurity removal pipe 4 is detected by the infrared signal transmitter 10 and the infrared signal receiver 11. The infrared signal transmitter 10 sends an infrared signal to the corresponding infrared signal receiver 11. When the infrared signal receiver 11 cannot receive the corresponding infrared signal, it transmits the corresponding signal to the controller. The controller then determines that the solid impurities have accumulated to a corresponding height, and through a preset program, automatically operates the switches of valves I5 and II7 to realize remote automatic quantitative impurity removal, thereby improving the degree of automation and further improving work efficiency.

[0029] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. A natural gas production structure using drainage, comprising a delivery pipe (1) for connecting an external gas-liquid separation device and an external suction pump, characterized in that: A filter baffle (2) is arranged inside the conveying pipe (1), and a plurality of filter holes (3) are evenly opened on the side surface of the filter baffle (2). A debris discharge pipe (4) is arranged in communication with the lower side of the conveying pipe (1). The debris discharge pipe (4) is arranged near the filter baffle (2), and the debris discharge pipe (4) and the filter baffle (2) are arranged in sequence along the gas-liquid conveying direction in the conveying pipe (1); a valve I (5) is arranged on the upper part of the debris discharge pipe (4), a debris discharge port (6) is arranged at the bottom of the debris discharge pipe (4), and a valve II (7) is arranged on the upper side of the debris discharge pipe (4) near the debris discharge port (6).

2. A water drainage and gas production structure for natural gas production according to claim 1, characterized in that: The filter baffle (2) is arranged obliquely on the inner side of the conveying pipe (1), and the filter baffle (2) is arranged obliquely downward along the gas-liquid conveying direction, with its inclined surface facing the impurity discharge pipe (4).

3. A water drainage and gas production structure for natural gas production according to claim 1 or 2, characterized in that: The filter baffle (2), the impurity discharge pipe (4), the valve I (5), the impurity discharge port (6) and the valve II (7) are arranged in at least two groups, and the apertures of the filter holes (3) on at least two of the filter baffles (2) decrease successively along the gas-liquid conveying direction.

4. A water drainage and gas production structure for natural gas production according to claim 3, characterized in that: The lower part of the impurity discharge pipe (4) is provided with an inclined portion (8), and the inclined portion (8) is arranged to be inclined downwards towards the axial direction of the impurity discharge pipe (4).

5. A water drainage and gas production structure for natural gas production according to claim 3, characterized in that: Two transparent observation windows (9) are symmetrically arranged on the impurity discharge pipe (4).

6. A water drainage and gas production structure for natural gas production according to claim 5, characterized in that: A plurality of infrared signal transmitters (10) are evenly arranged on the outer surface of one of the observation windows (9) from top to bottom, and a plurality of infrared signal receivers (11) corresponding to the infrared signal transmitters (10) are evenly arranged on the outer surface of the other observation window (9) from top to bottom.

7. A water drainage and gas production structure for natural gas production according to claim 1, characterized in that: Both ends of the delivery pipe (1) are respectively provided with connecting flanges (12).

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