Wellhead gas production device

Abstract

The utility model relates to a wellhead gas production device, and belongs to the field of gas production. Comprising a gas production tree and a tee joint, an oil pipe connector flange of the gas production tree is provided with an oil pipe pipeline, the end, away from the oil pipe connector flange, of the oil pipe pipeline is connected with the tee joint, a sleeve connector flange of the gas production tree is provided with a sleeve pipeline, and the end, away from the gas production tree, of the sleeve pipeline is communicated with the oil pipe pipeline through the tee joint. A conveying pipe is arranged on the tee joint, a ground wellhead sledge is arranged at the end, away from the tee joint, of the conveying pipe, and the tee joint and the conveying pipe make contact with the ground. The oil pipe pipeline and the casing pipeline are communicated, so that the device can adapt to different production stages, repeated construction is not needed, management is simple, and cost is saved; the tee joint, the conveying pipe and the ground wellhead skid are all in contact with the ground, climbing operation can be omitted, safety risks are effectively eliminated, and the ground wellhead skid is skid-mounted, so that site construction time can be greatly shortened.

Description

Technical Field

[0001] This utility model belongs to the field of gas extraction, and specifically relates to a wellhead gas extraction device. Background Technology

[0002] my country has abundant and widely distributed natural gas reserves with great development potential. With the rapid growth of the extraction scale, the workload of surface station construction has increased dramatically, which has placed higher demands on wellhead gas extraction equipment and processes.

[0003] Currently, most wellhead gas production equipment still adopts on-site installation and commissioning. The casing manifold, wellhead safety shut-off valve, and wellhead choke and metering equipment are installed sequentially on-site. This technology and process have the following problems: First, the on-site construction environment is complex, the installation time is long, and the manpower input is large, making it difficult to guarantee the construction cycle; Second, the gas well uses casing pipeline production during the self-flowing stage and tubing pipeline production during the auxiliary flow stage. Changing the production method requires changing the process from casing pipeline to tubing pipeline, resulting in repeated construction, difficult maintenance and management, and serious investment waste; Third, when using tubing production, the wellhead safety shut-off valve and wellhead choke and metering equipment are installed at high positions, which is inconvenient for workers and poses safety risks. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a wellhead gas production device, including a gas production tree and a tee. The gas production tree has a tubing interface flange with a tubing line, and the end of the tubing line away from the tubing interface flange is connected to the tee. The gas production tree also has a casing interface flange with a casing line, and the end of the casing line away from the gas production tree is connected to the tubing line through the tee. A delivery pipe is provided on the tee, and a surface wellhead skid is provided at the end of the delivery pipe away from the tee. Both the tee and the delivery pipe are in contact with the ground.

[0005] The surface wellhead skid includes a wellhead safety shut-off valve, a first gate valve, an oil nozzle, an angle throttle valve, and a second gate valve, which are connected in sequence via pipelines. The wellhead safety shut-off valve is connected to the delivery pipe.

[0006] The first gate valve is equipped with a temperature measuring and injection ring at one end of the wellhead safety shut-off valve.

[0007] The temperature measuring and filling ring is provided with an antifreeze filling port, a bubble drain filling port and a first temperature transmitter in sequence along the circumference.

[0008] The second gate valve is equipped with a temperature and pressure measuring ring at one end of the angle throttle valve.

[0009] The temperature and pressure measuring ring is provided with a pressure transmitter, a pressure gauge, and a second temperature transmitter in sequence along its circumference.

[0010] The nozzle orifice diameter ranges from 2 to 14 mm.

[0011] The oil nozzle is a fixed oil nozzle.

[0012] The opening of the angular throttle is 0-100%.

[0013] The tubing line comprises a first tubing and a second tubing, one end of the first tubing is connected with the tubing interface flange, the other end of the first tubing is connected with the second tubing perpendicularly, and one end of the second tubing away from the first tubing is connected with the tee joint.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1) the tubing line and the casing line of the utility model are communicated, can adapt to different production stages, need not repeat construction, and management is simple, and the cost is saved; the tee joint, the conveying pipe and the ground wellhead skid all contact with the ground, can save the climbing operation, effectively eliminates the safety risk, and the skid installation of the ground wellhead skid can greatly shorten the field construction time.

[0016] 2) the casing line in the utility model is used for flowing production in the initial stage of gas well exploitation, the pressure is high, the liquid amount is large, and the yield is large, the tubing line in the utility model is used for auxiliary production in the later stage of gas well exploitation, the pressure is low, the yield is low, and the liquid amount is relatively large, the casing line and the tubing line are communicated, only need to adjust the relative gate valve of the gas gathering tree to switch, not only improve the construction efficiency, but also save the cost, and the maintenance is convenient.

[0017] 3) the utility model has simple structure, convenient installation and high reliability.

[0018] Other features and advantages of the utility model will be set forth in the subsequent description, and part of them becomes obvious from the description, or is understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure indicated in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0020] Figure 1 A schematic view of a wellhead gas recovery device is shown.

[0021] 1, 2, 3, 4, 5, 6, 61, 62, 621, 622, 623, 63, 64, 65, 66, 661, 662, 663, 67, 7, 8. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be clearly and completely explained below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Figure 1 A schematic view of a wellhead gas production device is shown. As shown in the figure, Figure 1 A wellhead gas production device includes a gas production tree 1, a tee 4, a tubing line 3 of the gas production tree 1 is provided with a tubing line 3, the tubing line 3 is connected with the tee 4 at the end away from the tubing line 2, a casing line 7 of the gas production tree 1 is provided with a casing line 7, the casing line 7 is communicated with the tubing line 3 through the tee 4 at the end away from the gas production tree 1, the tee 4 is provided with a delivery pipe 5, the delivery pipe 5 is provided with a ground wellhead skid 6 at the end away from the tee 4, the tee 4 and the delivery pipe 5 are in contact with the ground.

[0024] The tubing line 3 and the casing line 7 of the gas production tree 1 in the import gas production device are communicated through the tee 4, so that when the production mode is changed, repeated construction is not needed, only the gate valve on the gas production tree 1 needs to be adjusted, the management is simple, the cost is low, the tee 4, the delivery pipe 5 and the ground wellhead skid 6 are all arranged on the ground, the safety risk can be eliminated, and the construction efficiency is improved.

[0025] In some embodiments, the ground wellhead skid 6 comprises a wellhead safety cutoff valve 61, a first gate valve 63, a choke 64, an angle throttle valve 65 and a second gate valve 67 connected in sequence by pipes, the wellhead safety cutoff valve 61 is connected with the delivery pipe 5; the wellhead safety cutoff valve 61 is used to cut off or connect the gas in the delivery pipe 5; the pipes play a role in transmission; the first gate valve 63 and the second gate valve 67 are used to cut off or connect the gas flow in the pipes; the choke 64 is used to adjust and control the production of the gas well, to ensure that the gas well runs in a stable working state, i.e. primary throttling; the angle throttle valve 65 is used to accurately control the flow and reduce energy loss, i.e. secondary throttling.

[0026] In some embodiments, the first gate valve 63 is provided with a temperature measuring and filling ring 62 at one end of the wellhead safety cutoff valve 61; the temperature measuring and filling ring 62 can accurately and effectively measure the temperature of the gas, and can also add defoaming agent and antifreeze through the temperature measuring and filling ring, improving the convenience.

[0027] In some embodiments, the temperature measuring and filling ring 62 is provided with an antifreeze filling port 621, a foam removal filling port 622 and a first temperature transmitter 623 in sequence along the circumference; the antifreeze filling port 621 is used to inject antifreeze into the temperature measuring and filling ring 62 to prevent the water in the natural gas from freezing and blocking the pipeline in a low temperature environment; the foam removal filling port 622 is used to inject surfactant into the temperature measuring and filling ring 62 to achieve the purpose of water removal for gas production; the first temperature transmitter 623 can accurately and effectively measure the temperature of the gas.

[0028] In some embodiments, the second gate valve 67 is provided with a temperature and pressure measuring ring 66 at one end of the angle throttle valve 65; the temperature and pressure measuring ring 66 can accurately and effectively measure the temperature of the gas, and can also measure the pressure of the gas in the pipeline after throttling through the temperature and pressure measuring ring 66, and can also provide workers with visual pressure data.

[0029] In some embodiments, the temperature and pressure measuring ring 66 is provided with a pressure transmitter 661, a pressure gauge 662 and a second temperature transmitter 663 in sequence along the circumference; the pressure transmitter 661 can accurately measure the pressure of the gas in the pipeline; the second temperature transmitter 663 can accurately measure the temperature of the gas in the pipeline; the pressure gauge 662 facilitates workers to understand the pressure information in the pipeline; the pressure transmitter 661, the pressure gauge 662 and the second temperature transmitter 663 can monitor the gas information after flowing through the angle throttle valve 65 in real time, and transmit the related signals of the gas to the control system, and the control system adjusts and controls the angle throttle valve 65 according to the signals, so as to ensure that the pressure and temperature in the pipeline are stable within a safe range, eliminating the safety risk.

[0030] In some embodiments, the oil nozzle 64 has a nozzle diameter ranging from 2 to 14 mm; the oil nozzle 64 has a nozzle diameter ranging from 2 to 14 mm, which facilitates the control of gas flow, the adjustment of pressure, the filtration of impurities, and the prevention of gas accumulation.

[0031] In some embodiments, the oil nozzle 64 has a nozzle diameter ranging from 5 to 10 mm; the oil nozzle 64 has a nozzle diameter ranging from 5 to 10 mm, which facilitates the control of gas flow, the adjustment of pressure, the filtration of impurities, and the prevention of gas accumulation.

[0032] In some embodiments, the oil nozzle 64 is a fixed oil nozzle 64; the fixed oil nozzle 64 plays a role in adjusting and controlling gas.

[0033] In some embodiments, the opening degree of the angle throttle valve 65 ranges from 0 to 100%; the opening degree of the angle throttle valve 65 ranges from 0 to 100%, which is used to adjust and stabilize the gas flow, so that the system runs more flexibly and efficiently.

[0034] In some embodiments, the opening degree of the angle throttle valve 65 ranges from 30 to 50%; the opening degree of the angle throttle valve 65 ranges from 30 to 50%, which is used to adjust and stabilize the gas flow, so that the system runs more flexibly and efficiently.

[0035] Specifically, the angle throttle valve 65 can be but is not limited to an electric angle throttle valve.

[0036] In some embodiments, the tubing line 3 includes a first tubing 31 and a second tubing 32, one end of the first tubing 31 is connected with the tubing interface flange 2, the other end of the first tubing 31 is connected with the second tubing 32 perpendicularly, and the end of the second tubing 32 away from the first tubing 31 is connected with the tee 4; the perpendicular connection of the first tubing 31 with the second tubing 32 facilitates the connection of the gas production tree 1 with the tee 4, and provides a contact condition for the contact of the tee 4 and the transport pipe 5 with the ground.

[0037] The working principle of the wellhead gas production device is as follows:

[0038] The tee 4 connecting the tubing line 3 and the casing line 7 and the transport pipe 5 and the ground wellhead skid 6 are all arranged on the ground, which can save the climbing operation, eliminate the safety risk, and shorten the on-site construction time by skid mounting the equipment; the connection of the tubing line 3 and the casing line 7 can adapt to different production stages.

[0039] In the self-flow production, the gate valve near the tubing interface flange 2 of the gas gathering tree 1 is opened, the casing line 7 is communicated with the casing of the gas well, the gate valve near the tubing interface flange 2 of the gas gathering tree 1 is closed, the connection between the tubing line 3 and the tubing of the gas well is cut off, the jet diameter of the choke 64 and the opening of the angle throttle valve 65 are adjusted according to the pressure of the gas well, after the adjustment, the medium in the tubing-casing annulus enters the casing line 7 through the pipeline of the gas gathering tree 1, and then flows through the tee joint 4, the transportation pipe 5 and the ground wellhead skid 6 in sequence.

[0040] The tee joint 4 and the transportation pipe 5 are installed close to the ground, and the ground wellhead skid 6 is also installed on the ground, so that it is unnecessary to climb when installing, and the installation process is simple and convenient.

[0041] Although the utility model has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced equivalently, and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A wellhead gas production device comprising a gas production tree (1), a tee (4), characterized in that, The tubing connection flange (2) of the gas production tree (1) is provided with a tubing line (3), one end of the tubing line (3) away from the tubing connection flange (2) is connected with a tee joint (4), the casing connection flange (8) of the gas production tree (1) is provided with a casing line (7), one end of the casing line (7) away from the gas production tree (1) is communicated with the tubing line (3) through the tee joint (4), the tee joint (4) is provided with a delivery pipe (5), one end of the delivery pipe (5) away from the tee joint (4) is provided with a surface wellhead skid (6), the tee joint (4) and the delivery pipe (5) are both in contact with the ground.

2. The wellhead gas production device according to claim 1, characterized in that The surface wellhead skid (6) comprises, in sequence through pipes, a wellhead safety shut-off valve (61), a first gate valve (63), a choke (64), an angle throttle (65) and a second gate valve (67), the wellhead safety shut-off valve (61) is communicated with the delivery pipe (5).

3. The wellhead gas production device according to claim 2, characterized in that The first gate valve (63) is provided with a temperature measuring and filling ring (62) at one end of the wellhead safety shut-off valve (61).

4. The wellhead gas production device according to claim 3, characterized in that The temperature measuring and filling ring (62) is provided, in sequence along the circumference, with an anti-freezing agent filling port (621), a foam cleaning filling port (622) and a first temperature transmitter (623).

5. The wellhead gas production device according to claim 2, characterized in that The second gate valve (67) is provided with a temperature and pressure measuring ring (66) at one end of the angle throttle (65).

6. The wellhead gas production device according to claim 5, characterized in that The temperature and pressure measuring ring (66) is provided, in sequence along the circumference, with a pressure transmitter (661), a pressure gauge (662) and a second temperature transmitter (663).

7. The wellhead gas recovery device of claim 2, wherein, The choke (64) is a fixed choke (64) and the diameter of the jet hole of the choke (64) ranges from 2mm to 14mm.

8. The wellhead gas production device of claim 2, wherein, The choke (64) is a fixed choke (64) and the diameter of the jet hole of the choke (64) ranges from 2mm to 14mm.

9. The wellhead gas production device according to any one of claims 2 to 8, characterized in that The opening of the angle throttle (65) ranges from 0% to 100%.

10. The wellhead gas recovery device of claim 1, wherein, The tubing line (3) comprises a first tubing (31) and a second tubing (32), one end of the first tubing (31) is connected with the tubing connection flange (2), the other end of the first tubing (31) is connected with the second tubing (32) perpendicularly, one end of the second tubing (32) away from the first tubing (31) is connected with the tee joint (4).

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