Wellhead skid-mounted device

Abstract

The utility model discloses a wellhead skid-mounted device which comprises a skid-mounted seat, a skid-mounted device body, a skid-mounted device body, a skid-mounted device body and a skid-mounted device body. The plurality of gas production units are arranged between the gas production manifold and the alcohol injection manifold and are fixed on the skid-mounted seat through a bracket; the plurality of alcohol injection units are arranged on one side of the alcohol injection manifold; the gas production gathering pipe and the alcohol injection gathering pipe are arranged in parallel, and the gathering pipes are detachably connected. By adjusting the sizes of the basic pry base, the expansion pry base and the end pry base, the number of the gas production units on each pry can be adjusted, on the premise that the transportation size of the pry is met, remote control over multiple gas wells and concentrated alcohol injection and gas production functions of the multiple gas wells are achieved, and meanwhile on-site alcohol injection and gas production pipelines are simplified. The wellhead skid-mounted device adopts a combined structure, is flexible to adjust, saves the occupied area, and is convenient for well site construction, management, production, manufacturing, transportation and installation.

Description

Technical Field

[0001] The present application relates to the technical field of wellhead gas production, and in particular to a wellhead skid. Background Art

[0002] The use of natural gas is becoming more and more popular in modern society because of its safety and high calorific value. Conventional wellhead skids are to centrally arrange the gas production pipeline and alcohol injection pipeline of each gas wellhead and related valves and instruments on a skid, so as to realize the gas production and alcohol injection functions of a single well. If there are multiple gas wells in the well site, a wellhead skid needs to be arranged at the wellhead of each gas well.

[0003] In the general wellhead skid installation of natural gas well sites, the gas production and alcohol injection pipelines of a single well are integrated on a skid seat, and each gas well is equipped with a wellhead skid separately. Although the gas production and alcohol injection functions are achieved, the layout is scattered, the floor space is large, the cost is high, and it is not conducive to centralized management. When there are many gas wells in a single well site, the on-site installation of the pipe is complicated, the construction period is long, and the quality is difficult to guarantee. Utility Model Content

[0004] The embodiment of the present application provides a wellhead skid to solve the technical problems of complex on-site installation of pipes, long construction period and difficulty in ensuring quality when there are a large number of gas wells in a single well site.

[0005] An embodiment of the present application provides a wellhead skid, comprising: a skid seat, a gas production manifold, an alcohol injection manifold, a main pipe unit, a gas production unit and an alcohol injection unit; the gas production manifold, the alcohol injection manifold, the main pipe unit, a plurality of gas production units and a plurality of alcohol injection units are all arranged on the skid seat; the gas production manifold is arranged in parallel with the alcohol injection manifold, and a plurality of gas production units are arranged between the gas production manifold and the alcohol injection manifold; a plurality of alcohol injection units are arranged corresponding to a plurality of gas production manifolds, and are respectively arranged on a side of the alcohol injection manifold away from the gas production unit; the main pipe unit is connected to the gas production manifold.

[0006] In a possible implementation, the alcohol injection unit includes an alcohol injection pipe, a lift check valve and a ball valve; the lift check valve and the ball valve are arranged on the alcohol injection pipe; the alcohol injection pipe is arranged on a side of the alcohol injection manifold away from the gas production unit.

[0007] In one possible implementation, the gas production unit includes a gas production pipe, a wellhead intelligent regulating valve arranged on the gas production pipe, a first pipe pressure gauge assembly, a first pipe pressure transmitter assembly, a high-pressure gate valve, an emergency shut-off valve, a second pipe pressure gauge assembly, a second pipe pressure transmitter assembly, a thermometer, a temperature transmitter, a check valve, and a gas production gate valve; a plurality of the gas production pipes are arranged between the gas production manifold and the alcohol injection manifold, and the two ends of the gas production pipes are respectively connected to the gas production manifold and the alcohol injection manifold.

[0008] In a possible implementation, the main pipe unit includes a main pipe and a main gate valve, the main gate valve is arranged on the main pipe, and the main pipe is connected to the gas production manifold.

[0009] In a possible implementation, the main unit also includes multiple bypass pipes and multiple branch gate valves; the multiple bypass pipes are arranged on the outside of the main pipe along the length direction of the main pipe and are connected to the main pipe; the multiple branch gate valves are respectively arranged on the multiple bypass pipes.

[0010] In a possible implementation, the skid mount includes a basic skid base, an extended skid base, and an end skid base; the basic skid base, the extended skid base, and the end skid base are detachably connected.

[0011] In a possible implementation, the gas production manifold includes a first manifold, a second manifold, and a third manifold; the first manifold, the second manifold, and the third manifold are detachably connected.

[0012] In a possible implementation, the alcohol injection manifold includes a first alcohol injection manifold, a second alcohol injection manifold and a third alcohol injection manifold; the first alcohol injection manifold, the second alcohol injection manifold and the third alcohol injection manifold are detachably connected.

[0013] In a possible implementation, the wellhead skid further includes an electrical box; the gas production unit and the control room are electrically connected via the electrical box.

[0014] In a possible implementation, the wellhead skid further includes a new well access port; the new well access port is disposed on the gas production manifold and is in communication with the gas production manifold.

[0015] The technical solution provided in the embodiments of the present application has at least the following technical effects:

[0016] An embodiment of the present application provides a wellhead skid, which concentrates multiple gas production units and alcohol injection units on one device, and connects the multiple gas production units and alcohol injection units with a gas production manifold and an alcohol injection manifold, and finally brings them together and is controlled by a main unit. Under the premise of meeting the skid-mounted transportation size, the requirements of centralized gas production and alcohol injection control of multiple gas wells are achieved, and the wellheads of multiple gas wells are integrated into a skid, which saves space and is convenient for well site construction and management. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the wellhead skid provided in the embodiment of the present application;

[0019] Figure 2 A structural front view of a gas extraction unit provided in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the structure of the alcohol injection unit provided in an embodiment of the present application.

[0021] Figure numerals: 1-skid mount; 11-basic skid base; 12-extension skid base; 13-end skid base; 2-gas production manifold; 21-first manifold; 22-second manifold; 23-third manifold; 3-alcohol injection manifold; 31-first alcohol injection manifold; 32-second alcohol injection manifold; 33-third alcohol injection manifold; 4-main unit; 40-main gate valve; 41-main pipe; 42-bypass pipe; 43-shunt gate valve; 5-gas production unit; 502-gas production pipe; 51- Wellhead intelligent regulating valve; 52-first pipe pressure gauge assembly; 53-first pipe pressure transmitter assembly; 54-high-pressure gate valve; 55-emergency shut-off valve; 56-second pipe pressure gauge assembly; 57-second pipe pressure transmitter assembly; 58-thermometer; 59-temperature transmitter; 50-gas production check valve; 501-gas production gate valve; 6-alcohol injection unit; 61-alcohol injection pipe; 62-lift check valve; 63-ball valve; 64-alcohol injection port; 8-electrical box; 9-new well access port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0023] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] The present application embodiment provides a wellhead skid, such as Figures 1 to 3 As shown. The wellhead skid includes a skid seat 1, a gas production manifold 2 installed on the skid seat 1, an alcohol injection manifold 3, a main unit 4, a gas production unit 5 and an alcohol injection unit 6. Generally, the gas production manifold 2 and the alcohol injection manifold 3 are fixed on two sides parallel to the skid seat 1 with connectors, and the gas production manifold 2 and the alcohol injection manifold 3 are parallel to each other. The gas production unit 5 is used to collect wellhead gas, and one gas production unit 5 corresponds to one gas well. During assembly, one or more gas production units 5 are fixed on the skid seat 1 with a bracket at a vertical position between the gas production manifold 2 and the alcohol injection manifold 3. In the gas production process, alcohol injection is usually used to prevent the formation of hydrates in the gas production unit 5, that is, an alcohol injection unit 6 is installed at the position corresponding to the gas production unit 5 on the other side of the alcohol injection manifold 3. The main unit 4 is an indispensable component for centralized gas production. It is installed on the other side of the gas production manifold 2 with a connector and is connected to the gas production manifold 2. Through its centralized control of the gas production manifold 2 and multiple gas production units 5, it realizes the function of simultaneously producing gas from multiple gas wells and centrally collecting wellhead gas.

[0025] like Figure 3As shown, the alcohol injection unit 6 includes an alcohol injection pipe 61, a lift check valve 62 and a ball valve 63 installed on the alcohol injection pipe 61. The alcohol injection pipe 61 is arranged on the other side of the alcohol injection manifold 3 corresponding to the gas production unit 5, and the alcohol injection pipe 61 and the alcohol injection manifold 3 are connected by a connector. The skid-mounted external alcohol injection agent enters the alcohol injection pipe 61 through the alcohol injection manifold 3 and is divided into multiple routes to enter the gas production unit 5. The lift check valve 62 is connected with the ball valve 63 after the alcohol injection port 64, and the alcohol injection pipe 61 is connected to the alcohol injection manifold 3 after the lift check valve 62. The alcohol injection agent enters other pipelines through the alcohol injection manifold 3 to ensure centralized control of alcohol injection.

[0026] like Figure 2 The gas production unit 5 comprises: the wellhead gas passes through the gas production pipe 502, the gas production pipe 502 is fixed on the skid 1 with a bracket and is vertically installed between the gas production manifold 2 and the alcohol injection manifold 3, and the two ends are respectively connected with the gas production manifold 2 and the alcohol injection manifold 3. The gas production components arranged on the gas production pipe 502 are connected to each other, and the wellhead intelligent regulating valve 51, the first pipe pressure gauge assembly 52, the first pipe pressure transmitter assembly 53, the high-pressure gate valve 54, the emergency shut-off valve 55, the second pipe pressure gauge assembly 56, the second pipe pressure transmitter assembly 57, the thermometer 58, the temperature transmitter 59, the gas production check valve 50, and the gas production gate valve 501 are sequentially connected from the end of the alcohol injection manifold 3. The alcohol injection agent enters the gas production unit 5 from the alcohol injection unit 6, and the wellhead gas of multiple gas wells enters from the left port of the gas production unit 5 and mixes with the alcohol injection agent, enters the gas production pipe 502 through the wellhead intelligent regulating valve 51, passes through the first pipe pressure gauge assembly 52, the first pipe pressure transmitter assembly 53, the emergency shut-off valve 55, the second pipe pressure gauge assembly 56, the second pipe pressure transmitter assembly 57, the thermometer 58, the temperature transmitter 59, the gas production check valve 50 and the gas production gate valve 501, and then converges together and enters the gas production manifold 2.

[0027] like Figure 1 As shown, the main unit 4 includes a main pipe 41 and a main gate valve 40. The main gate valve 40 is installed on the main pipe 41. The main pipe 41 is connected to the gas production manifold 2. The main unit 4 also includes a plurality of bypass pipes 42 and a plurality of branch gate valves 43. The bypass pipes 42 are installed on the outside of the main pipe 41 along the length direction of the main pipe 41 and are connected to the main pipe 41. The plurality of branch gate valves 43 are respectively installed on the plurality of bypass pipes 42. When the sand content is large, the main gate valve 40 is closed, and the plurality of branch gate valves 43 are connected to the desander inlet and outlet. The branch gate valve 43 is opened to allow the natural gas to pass through the desander, thereby separating the sand particles in the natural gas. When the sand content is small, the main gate valve 40 can be directly used and the branch gate valve 43 can be closed.

[0028] like Figure 1As shown, the skid mount 1 includes a basic skid base 11, an extended skid base 12 and an end skid base 13, and the basic skid base 11, the extended skid base 12 and the end skid base 13 are detachably connected by related connectors. When assembling, the number of gas production units 5 can be adjusted by changing the sizes of the basic skid base 11, the extended skid base 12 and the end skid base 13 to match the gas production manifold 2 and the alcohol injection manifold 3 of different specifications, so as to realize the combination of one-well to multi-well wellhead skids. The combined structure is adopted, and the adjustment is flexible. The sizes of the basic skid base 11, the extended skid base 12 and the end skid base 13 correspond to the different sizes of the gas production manifold 3. The size of the wellhead skid can be adjusted according to the model matching, and the number of gas production units 5 can be flexibly adjusted according to the number of wellheads at the gas production site.

[0029] The gas production manifold 2 includes a first manifold 21, a second manifold 22 and a third manifold 23, which are detachably connected by flanges, gaskets and fasteners. At the same time, the first manifold 21, the second manifold 22 and the third manifold 23 are detachably installed on one side of the basic skid base 11, the extended skid base 12 and the end skid base 13, respectively.

[0030] The alcohol injection manifold 3 includes a first alcohol injection manifold 31, a second alcohol injection manifold 32 and a third alcohol injection manifold 33, and the first alcohol injection manifold 31, the second alcohol injection manifold 32 and the third alcohol injection manifold 33 are detachably connected by flanges, gaskets and fasteners. At the same time, the corresponding detachable ones are installed on the basic skid base 11, the expansion skid base 12 and the end skid base 13 on one side parallel to the gas production manifold 2.

[0031] Furthermore, the wellhead skid includes an electrical box 8, and the gas production unit 5 is electrically connected to the control room through the electrical box 8. More specifically, the wellhead intelligent regulating valve 51 and the emergency shut-off valve 55 are powered by the electrical box 8, and the signals of the wellhead intelligent regulating valve 51, the emergency shut-off valve 55, the first pipe pressure transmitter assembly 53, the second pipe pressure transmitter assembly 57, and the temperature transmitter 59 are electrically connected to the control room through the electrical box 8. The wellhead intelligent regulating valve 51 can control the switch and flow regulation of the gas well, the emergency shut-off valve 55 realizes the high and low pressure protection function of the pipeline, and the first pipe pressure transmitter assembly 53, the second pipe pressure transmitter assembly 57 and the temperature transmitter 59 collect pressure, temperature and other data. The wellhead intelligent regulating valve 51 and the emergency shut-off valve 55 both have remote control functions, and together with the temperature and pressure instruments, realize the automation and digital management of the gas well.

[0032] In addition, the wellhead skid also includes a new well access port 9, which is connected to the gas production manifold 2 with fasteners and vertically connected to the gas production manifold 2 at a position between the alcohol injection manifold 3 and the gas production manifold 2. According to the number of gas wells on site or other similar needs, the new well access port 9 can be connected to the gas production unit 5 or other components, and the gas production gate valve 501 of the new well access port 9 can be closed when not in use.

[0033] like Figure 2 As shown, the first pipe pressure gauge assembly 52, the first pipe pressure transmitter assembly 53, the second pipe pressure gauge assembly 56, and the second pipe pressure transmitter assembly 57 all include flange stop valves and two valve groups matched therewith, so as to adjust and repair the instruments. The flange stop valve and the two valve groups are double-valve controlled, the two valves are connected in series, and double insurance is provided. The flange stop valve controls the switch, and the two valve groups can not only control the switch, but also take samples and vent.

[0034] Of course, the skid-mounted device at the wellhead may also have other structures for pipe installation, such as threaded connection which is more common in reality, and other connection methods may also be adopted, such as snap-in connection and plug-in connection, as long as a detachable connection can be achieved.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A wellhead skid, characterized in that: include: A skid-mounted seat (1), a gas production manifold (2), an alcohol injection manifold (3), a main pipe unit (4), a gas production unit (5) and an alcohol injection unit (6); The gas collection manifold (2), the alcohol injection manifold (3), the main pipe unit (4), a plurality of gas collection units (5) and a plurality of alcohol injection units (6) are all arranged on the skid-mounted seat (1); The gas collection manifold (2) and the alcohol injection manifold (3) are arranged in parallel, and a plurality of the gas collection units (5) are arranged between the gas collection manifold (2) and the alcohol injection manifold (3); The plurality of alcohol injection units (6) are arranged corresponding to the plurality of gas collection manifolds (2), and are respectively arranged on a side of the alcohol injection manifold (3) away from the gas collection unit (5); The main pipe unit (4) is in communication with the gas production manifold (2).

2. The wellhead skid according to claim 1, characterized in that: The alcohol injection unit (6) comprises an alcohol injection pipe (61), a lift check valve (62) and a ball valve (63); The lifting check valve (62) and the ball valve (63) are arranged on the alcohol injection pipe (61); The alcohol injection pipe (61) is arranged on a side of the alcohol injection manifold (3) away from the gas production unit (5).

3. The wellhead skid according to claim 1, characterized in that: The gas production unit (5) comprises a gas production pipe (502), a wellhead intelligent regulating valve (51), a first pipe pressure gauge assembly (52), a first pipe pressure transmitter assembly (53), a high-pressure gate valve (54), an emergency shut-off valve (55), a second pipe pressure gauge assembly (56), a second pipe pressure transmitter assembly (57), a thermometer (58), a temperature transmitter (59), a gas production check valve (50), and a gas production gate valve (501); The wellhead intelligent regulating valve (51), the first pipe pressure gauge assembly (52), the first pipe pressure transmitter assembly (53), the high-pressure gate valve (54), the emergency shut-off valve (55), the second pipe pressure gauge assembly (56), the second pipe pressure transmitter assembly (57), the thermometer (58), the temperature transmitter (59), the gas production check valve (50), and the gas production gate valve (501) are all arranged on the gas production pipe (502); The plurality of gas production pipes (502) are arranged between the gas production manifold (2) and the alcohol injection manifold (3), and two ends of the gas production pipes (502) are respectively connected to the gas production manifold (2) and the alcohol injection manifold (3).

4. The wellhead skid according to claim 1, characterized in that: The main pipe unit (4) comprises a main pipe (41) and a main gate valve (40); The main path gate valve (40) is arranged on the main path pipe (41); The main line pipe (41) is in communication with the gas production manifold (2).

5. The wellhead skid according to claim 4, characterized in that: The main unit (4) further comprises a plurality of bypass pipes (42) and a plurality of branch gate valves (43); The plurality of bypass pipes (42) are arranged outside the main pipe (41) along the length direction of the main pipe (41) and are in communication with the main pipe (41); The plurality of branch gate valves (43) are respectively arranged on the plurality of bypass pipes (42).

6. The wellhead skid according to claim 1, characterized in that: The skid mount (1) comprises a basic skid base (11), an extended skid base (12) and an end skid base (13); The basic skid base (11), the extended skid base (12) and the end skid base (13) are detachably connected.

7. The wellhead skid according to claim 1, characterized in that: The gas production manifold (2) comprises a first manifold (21), a second manifold (22) and a third manifold (23); The first manifold (21), the second manifold (22) and the third manifold (23) are detachably connected.

8. The wellhead skid according to claim 1, characterized in that: The alcohol injection manifold (3) comprises a first alcohol injection manifold (31), a second alcohol injection manifold (32) and a third alcohol injection manifold (33); The first alcohol injection manifold (31), the second alcohol injection manifold (32) and the third alcohol injection manifold (33) are detachably connected.

9. The wellhead skid according to claim 1, characterized in that: Also included is an electrical box (8); The gas collection unit (5) is electrically connected to the control room via the electrical box (8).

10. The wellhead skid according to claim 1, characterized in that: Also included is a new well access port (9); The new well access port (9) is arranged on the gas production manifold (2) and is in communication with the gas production manifold (2).

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