Gas well pressure detection device and gas well structure thereof

Abstract

The utility model relates to the field of gas production, in particular to a gas well pressure detection device and a gas well structure thereof, the detection device comprises a pressure guide pipe and a pressure transmitter, the pressure guide pipe is used for being connected with a valve located in a gas well mouth, the end portion of the pressure guide pipe is connected with a cock, the pressure guide pipe is connected with the pressure transmitter through the cock, and the pressure transmitter is connected with the pressure transmitter through the cock. The device further comprises a fixing mechanism, the fixing mechanism is used for being connected with a grating plate at the position of a gas well mouth, a limiting interval is arranged on the fixing mechanism, and the pressure guide pipe extends to the position above the gas well through the limiting interval. According to the gas well pressure detection device and the gas well structure thereof, the pressure guide pipe is connected with the valve in the gas well mouth, the pressure guide pipe extends to the outside of the gas well mouth, and the pressure transmitter is connected to the port, located outside the gas well, of the pressure guide pipe for pressure detection, so that the pressure detection accuracy is prevented from being influenced by accumulated water in the well; and meanwhile, the fault rate of the pressure transmitter is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas production, in particular to a gas well pressure detection device and a gas well structure thereof. Background Art

[0002] During the production process of natural gas wells, the gas well pressure can directly reflect the changes in the gas layer. The gas well pressure includes surface casing pressure, technical casing pressure, tubing pressure and casing pressure. In order to detect these pressure data, a pressure transmitter is usually installed at the wellhead. The pressure transmitter is set in a one-to-one correspondence with the above-mentioned detection objects. However, since some detection objects are located inside the wellhead, such as the surface casing and technical casing, water accumulation in the wellhead during the rainy season will make it impossible to read the pressure, and it will also increase the failure rate of the pressure transmitter.

[0003] Therefore, a technical solution is currently needed to solve the technical problem that when the pressure transmitter collects data at the gas wellhead, water accumulates in the well during the rainy season, data collection will be affected, and the failure rate of the pressure transmitter will also increase. Utility Model Content

[0004] The purpose of this utility model is to overcome the technical problem in the prior art that when a pressure transmitter collects data at the wellhead of a gas well, water accumulates in the well during the rainy season, which affects data collection and increases the failure rate of the pressure transmitter, and to provide a gas well pressure detection device and a gas well structure thereof.

[0005] In the first aspect, the utility model provides a gas well pressure detection device, including a pressure guiding pipe and a pressure transmitter, wherein the pressure guiding pipe is used to connect to a valve located in the wellhead of the gas well, and a cock is connected to the end of the pressure guiding pipe, and the pressure guiding pipe is connected to the pressure transmitter through the cock. The utility model also includes a fixing mechanism, which is used to be connected to the grid plate at the wellhead of the gas well. A limit interval is set on the fixing mechanism, and the pressure guiding pipe extends to the top of the gas well through the limit interval.

[0006] The utility model discloses a gas well pressure detection device. When in use, a pressure guiding pipe is connected to a valve in a gas wellhead, and the end of the pressure guiding pipe connected to the cock is extended from the grid plate of the wellhead to the outside of the wellhead. Finally, a pressure transmitter is connected to the cock, so that the pressure transmitter can perform pressure detection outside the well, thereby avoiding the influence of water accumulation in the well on the accuracy of pressure detection and reducing the failure rate of the pressure transmitter. The pressure guiding pipe is extended to the outside of the gas well through the limit interval on the fixing mechanism. The limit interval on the fixing mechanism limits the pressure guiding pipe located therein, thereby reducing the shaking of the pressure guiding pipe and the pressure transmitter.

[0007] Preferably, the fixing mechanism includes two clamping plates, which are connected by bolts and clamped on the upper and lower sides of the grille plate respectively. The two clamping plates are correspondingly provided with limiting grooves, and the two limiting grooves are interconnected to form the limiting interval.

[0008] The fixing mechanism is in the form of two splints, which are respectively clamped on the upper and lower sides of the gas wellhead grid plate when in use, thereby realizing the connection between the fixing mechanism and the grid plate. There is no need to drill holes in the grid plate for installing the fixing mechanism, and the installation method is simpler. The position can also be adjusted so that the pressure pipe can be aligned with the limit interval on the fixing mechanism. Moreover, the limit grooves on the two splints are respectively limited to positions of different heights of the pressure pipe, making the pressure pipe more stable and less prone to shaking.

[0009] Preferably, the pressure guiding pipe comprises a horizontal section and a vertical section which are interconnected, the horizontal section is used to connect to a valve in a wellhead of a gas well, and the vertical section is connected to the cock.

[0010] The pressure transmitter can be installed in a vertical section on the pressure guide pipe to reduce the shaking of the pressure transmitter, and the horizontal section can be easily connected to the valve on the side of the gas tree.

[0011] Preferably, the number of the pressure-guiding tubes is at least two, and the fixing mechanism is provided with a plurality of limiting intervals, and the limiting intervals are arranged in a one-to-one correspondence with the pressure-guiding tubes.

[0012] When there are multiple pressure data that need to be tested in the gas wellhead, at least two pressure pipes are set to match the components to be tested in the wellhead. At the same time, limit intervals are added to the fixing mechanism according to the number of pressure pipes. Multiple pressure pipes share one fixing mechanism, which reduces material consumption and simplifies the installation steps of the fixing mechanism.

[0013] Preferably, the diameter of the pressure guiding tube is d, d=10mm±2mm.

[0014] The diameter of the pressure pipe is set to 10mm±2mm, and its wall thickness is usually set to 3mm±1mm to ensure that the pressure pipe has sufficient pressure-bearing capacity, can withstand the weight of the upper cock and pressure transmitter, and can easily pass through the grid plate at the wellhead.

[0015] Preferably, the pressure guiding pipe is a stainless steel structural component.

[0016] The pressure pipe made of stainless steel has sufficient strength and strong corrosion resistance. It can maintain a long service life when the medium contains corrosive substances.

[0017] Preferably, the end of the pressure-guiding pipe away from the cock is connected to a reducer, and the pressure-guiding pipe is connected to a valve in the wellhead of the gas well through the reducer.

[0018] Since the diameter of the pressure pipe is usually different from the diameter of the pressure tapping plug on the valve, a reducer is added to the end of the pressure pipe to connect the pressure pipe to the valve in the wellhead.

[0019] In a second aspect, the utility model provides a gas well structure, comprising a well body, a grid plate provided at the upper end of the well body, a gas production tree provided in the well body, a plurality of valves provided on the gas production tree, and also comprising a gas well pressure detection device as described above, wherein the end of the pressure guide pipe away from the cock is connected to the valve.

[0020] The utility model discloses a gas well structure. A grid plate is provided at the mouth of the gas well to facilitate workers to work on the grid plate. The inside of the well body is connected to the pressure-taking wire plug of the valve through a pressure guide pipe. The pressure transmitter used for detection is extended to the grid plate, avoiding the influence of water accumulation in the well on the pressure transmitter.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The utility model provides a gas well pressure detection device and a gas well structure thereof. A pressure guide pipe is provided to connect with a valve in the gas well wellhead, and the guide pressure pipe is extended to the outside of the gas well wellhead. A pressure transmitter is connected to the port of the pressure guide pipe located outside the gas well for pressure detection, thereby avoiding water accumulation in the well affecting the accuracy of pressure detection and reducing the failure rate of the pressure transmitter.

[0023] 2. The utility model provides a gas well pressure detection device and a gas well structure thereof. The pressure guide tube extends to the outside of the gas well through the limit interval on the fixing mechanism. The limit interval on the fixing mechanism limits the pressure guide tube located therein, thereby reducing the shaking of the pressure guide tube and the pressure transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a gas well pressure detection device of the utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of area A in the middle;

[0026] Figure 3 This is a schematic diagram of a gas well structure of the utility model;

[0027] Markings in the figure:

[0028] 1-pressure guiding pipe, 11-horizontal section, 12-vertical section, 2-pressure transmitter, 3-cock, 4-fixing mechanism, 401-limiting interval, 41-clamping plate, 411-limiting slot, 42-bolt, 5-reducing pipe, 6-well body, 7-grid plate, 8-gas tree, 9-valve. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0030] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "center," "inside," and "outside," are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is typically placed when in use. These terms indicating orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians. They do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, and therefore should not be construed as limiting the present invention.

[0031] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.

[0032] In addition, the expressions "first", "second", "third", etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0033] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0034] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified / defined / restricted, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communication connections; they may be direct connections, indirect connections through an intermediate medium, or internal connections between two components.

[0035] Example 1

[0036] like Figure 1 and Figure 3 As shown, a gas well pressure detection device includes a pressure pipe 1 and a pressure transmitter 2, the pressure pipe 1 is used to connect to the valve 9 located in the gas wellhead, the end of the pressure pipe 1 is connected to a cock 3, the pressure pipe 1 is connected to the pressure transmitter 2 through the cock 3, and also includes a fixing mechanism 4, the fixing mechanism 4 is used to connect to the grid plate 7 at the gas wellhead, the fixing mechanism 4 is provided with a limit interval 401, the pressure pipe 1 extends to the top of the gas well through the limit interval 401

[0037] When in use, the pressure-guiding pipe 1 is connected to the valve 9 in the wellhead of the gas well, and the end of the pressure-guiding pipe 1 connected to the cock 3 is extended from the grid plate 7 at the wellhead to the outside of the wellhead, and finally the pressure transmitter 2 is connected to the cock 3, so that the pressure transmitter 2 can perform pressure detection outside the well, avoiding the influence of water accumulation in the well on the accuracy of pressure detection, and reducing the failure rate of the pressure transmitter 2. One end of the pressure-guiding pipe 1 is connected to the valve 9 in the gas well, and the other end is extended to the outside of the gas well through the limit interval 401 on the fixing mechanism 4. The limit interval 401 on the fixing mechanism 4 limits the pressure-guiding pipe 1 located therein, which can reduce the shaking of the pressure-guiding pipe 1 and the pressure transmitter 2.

[0038] Cock: Cock 3 is a valve with a shut-off function and an interface. The specific model is: EF-3 (304SS / 316SS-2-MA6-NF2). This valve integrates three devices: shut-off, calibration and exhaust. It has a compact structure and a pair of internal and external threaded interfaces for the installation of pressure gauges, pressure sensors or pressure switches.

[0039] Fixing mechanism 4: The fixing mechanism 4 includes two clamping plates 41, and the two clamping plates 41 are connected by bolts 42 and are respectively clamped on the upper and lower sides of the grille plate 7. The two clamping plates 41 are correspondingly provided with limiting grooves 411, and the two limiting grooves 411 are interconnected to form the limiting interval 401. There is no need to punch holes on the grille plate 7 for installing the fixing mechanism 4, and the installation method is simpler. The position can also be adjusted so that the pressure pipe 1 can be aligned with the limiting interval 401 on the fixing mechanism 4. Moreover, the limiting grooves 411 on the two clamping plates 41 are respectively limited to positions of different heights of the pressure pipe 1, so that the pressure pipe 1 is more stable and not prone to shaking.

[0040] Pressure guiding pipe 1: The pressure guiding pipe 1 includes a horizontal section 11 and a vertical section 12 that are interconnected. The horizontal section 11 is used to connect to the valve 9 in the wellhead of the gas well, and the vertical section 12 is connected to the cock 3. The pressure guiding pipe 1 can reduce the shaking of the pressure transmitter 2 by setting the vertical section 11 to install the pressure transmitter 2, and it is convenient to connect with the valve 9 on the side of the gas tree by setting the horizontal section 12; the diameter of the pressure guiding pipe 1 is set to 10mm±2mm, and its wall thickness is usually set to 3mm±1mm to ensure that the pressure guiding pipe 1 has sufficient pressure bearing capacity, can also withstand the weight of the upper cock 3 and the pressure transmitter 2, and can pass through the grid plate 7 of the wellhead more easily; the pressure guiding pipe 1 is a stainless steel structural part. The pressure guiding pipe 1 made of stainless steel has sufficient strength and strong corrosion resistance. When the medium contains corrosive substances, it can maintain a long service life.

[0041] Furthermore, a reducing pipe 5 is connected to the end of the pressure guiding pipe 1 , and the pressure guiding pipe 1 is connected to a valve 9 in the wellhead of the gas well through the reducing pipe 5 .

[0042] Example 2

[0043] like Figure 1 and Figure 2 As shown, the difference between this embodiment and embodiment 2 is that the number of the pressure guiding tubes 1 is at least two, and the fixing mechanism 4 is provided with a plurality of limiting intervals 401 , and the limiting intervals 401 are arranged in a one-to-one correspondence with the pressure guiding tubes 1 .

[0044] In this embodiment, when there are multiple pressure data that need to be detected in the wellhead of the gas well, for example, the valves of the surface casing and the technical casing are all set in the wellhead, at least two pressure-guiding pipes 1 are set to match the components to be detected in the wellhead, and at the same time, a limit interval 401 is added to the fixing mechanism 4 according to the number of pressure-guiding pipes 1. Multiple pressure-guiding pipes 1 share one fixing mechanism 4, which reduces material consumption and simplifies the installation steps of the fixing mechanism 4.

[0045] Example 3

[0046] like Figure 3 As shown, in this embodiment, a gas well structure is provided, including a well body 6, a grid plate 7 is provided at the upper end of the well body 6, a gas production tree 8 is provided in the well body 6, and a plurality of valves 9 are provided on the gas production tree 8. It also includes a gas well pressure detection device as described in any one of Examples 1-3, and the end of the pressure pipe 1 away from the cock 2 is connected to the valve 9.

[0047] A gas well structure in the utility model is provided with a grid plate 7 at the mouth of the gas well to facilitate the workers to work on the grid plate 7. The inside of the well body 6 is connected to the pressure plug of the valve 9 through a pressure pipe 1, and the pressure transmitter 2 used for detection is extended to the grid plate 7, avoiding the influence of water accumulation in the well on the pressure transmitter 2.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas well pressure detection device, characterized in that: The invention comprises a pressure-conducting pipe (1) and a pressure transmitter (2), wherein the pressure-conducting pipe (1) is used to connect a valve located in a gas wellhead, a cock (3) is connected to the end of the pressure-conducting pipe (1), and the pressure-conducting pipe (1) is connected to the pressure transmitter (2) via the cock (3), and further comprises a fixing mechanism (4), wherein the fixing mechanism (4) is used to connect to a grid plate at the gas wellhead, a limit interval (401) is provided on the fixing mechanism (4), and the pressure-conducting pipe (1) extends to the top of the gas well through the limit interval (401).

2. A gas well pressure detection device according to claim 1, characterized in that: The fixing mechanism (4) comprises two clamping plates (41), the two clamping plates (41) being connected by bolts (42) and respectively clamped on the upper and lower sides of the grid plate, the two clamping plates (41) being provided with corresponding limiting slots (411), and the two limiting slots (411) being interconnected to form the limiting interval (401).

3. A gas well pressure detection device according to claim 1, characterized in that: The pressure-guiding pipe (1) comprises a horizontal section (11) and a vertical section (12) that are interconnected, wherein the horizontal section (11) is used to connect to a valve in a gas wellhead, and the vertical section (12) is connected to the cock (3).

4. A gas well pressure detection device according to claim 1, characterized in that: The number of the pressure-guiding tubes (1) is at least two, and the fixing mechanism (4) is provided with a plurality of limiting intervals (401), and the limiting intervals (401) are arranged in a one-to-one correspondence with the pressure-guiding tubes (1).

5. A gas well pressure detection device according to claim 1, characterized in that: The diameter of the pressure guiding tube (1) is d, d=10mm±2mm.

6. A gas well pressure detection device according to claim 1, characterized in that: The pressure guiding pipe (1) is a stainless steel structural member.

7. A gas well pressure detection device according to claim 1, characterized in that: One end of the pressure-guiding pipe (1) away from the cock (3) is connected to a reducer (5), and the pressure-guiding pipe (1) is connected to a valve in the wellhead of the gas well via the reducer (5).

8. A gas well structure, comprising a well body (6), a grid plate (7) being provided at the upper end of the well body (6), a gas tree (8) being provided in the well body (6), and a plurality of valves (9) being provided on the gas tree (8), characterized in that: It also includes a gas well pressure detection device as described in any one of claims 1 to 7, wherein the end of the pressure guide pipe (1) away from the cock (3) is connected to the valve (9).

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