Christmas tree medicament filling mechanism

Abstract

The utility model relates to the technical field of shale gas well foam drainage gas production equipment, in particular to a gas production tree medicament filling mechanism which comprises a filling connector, a check valve, a switch valve and a three-way connector which are sequentially connected. The three-way connector is further connected with a gas production tree casing pipe and a medicament filling pipeline, the check valve is connected with the filling connector through a hose, and the hose comprises a high-pressure hose with the withstand pressure not lower than 10 Mpa. The device can be temporarily added between a gas production tree sleeve and a chemical filling pipeline, so that the existing chemical filling pipeline can fill chemicals into the sleeve and an oil pipe at the same time, the cost is low, the chemical filling pipeline can be recycled, and the manpower and material resource cost for comprehensively paving the chemical filling pipeline is avoided; the hose structure can adapt to temporary oil pipe agent filling of multiple gas wells with different distances and can be moved and flexibly used according to actual requirements such as production stages and liquid accumulation conditions of the different gas wells, and the equipment resource utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the technical field of shale gas well bubble drainage gas production equipment, and in particular to a gas production tree reagent injection mechanism. Background Technology

[0002] Foam drainage is an important and commonly used auxiliary drainage method in the entire production cycle of shale gas fields. It mainly uses a plunger pump to deliver the foam drainage agent into the wellhead casing injection port through a pre-laid seamless steel pipe. As the production time increases, for gas wells with severe fluid accumulation, high water production rate and low pressure, it is necessary to further perform periodic tubing injection of foam drainage to improve the drainage effect. At the same time, in the later stage of gas well production, due to the frequent occurrence of problems such as scaling, precipitation, formation sand production and water lock, it is also necessary to periodically inject unblocking agents into the tubing to continuously remove blockages and ensure normal gas well production.

[0003] Because the frequency of adding dewatering and unblocking agents to the tubing is relatively low, existing wellheads generally do not have dedicated agent injection lines connected to the tubing. If a new agent injection line for the tubing were to be laid, a large number of seamless steel pipes, connectors, and seals would need to be purchased, resulting in high labor and material costs. Therefore, a dewatering truck is generally used to temporarily connect the tubing for agent injection. However, dewatering trucks are greatly affected by road conditions and have difficulty entering the gas well platform, which obstructs the injection of agents into the tubing and affects the normal production in the later stages of gas well production. Utility Model Content

[0004] The purpose of this utility model is to overcome the technical problems existing in the prior art, such as the existing chemical injection pipelines that are not equipped with dedicated connecting oil pipes and are difficult to drive into the wellhead of the gas well where the foaming truck is located, the high labor and material costs of re-laying the chemical injection pipelines, and the impact on the normal production of the gas well in the later stage, and to provide a chemical injection mechanism for the gas production tree.

[0005] This utility model provides a gas-producing tree chemical injection mechanism, including an injection connector, a check valve, a switch valve, and a tee connector connected in sequence. The injection connector can be adapted to connect to a reserved injection port on the oil pipe flange. The tee connector also connects the gas-producing tree casing and the chemical injection pipeline. The check valve is connected to the injection connector through a hose, and the hose includes a high-pressure hose with a pressure resistance of not less than 10 MPa.

[0006] This utility model discloses a pre-gas tree chemical injection mechanism that can be temporarily installed between the pre-gas tree casing and the chemical injection pipeline, enabling the existing chemical injection pipeline to simultaneously inject chemicals into both the casing and tubing. This method is low-cost and reusable, avoiding the manpower and material costs of laying chemical injection pipelines across the entire tubing. Furthermore, the flexible hose structure can adapt to the temporary injection of chemicals into tubing at multiple gas wells with varying distances, offering a wide range of applications. It can also be moved and used flexibly according to the actual needs of different gas well production stages and fluid accumulation conditions, thereby improving equipment resource utilization.

[0007] Preferably, the check valve and the switching valve are connected by a rigid pipe section, and the switching valve and the tee are connected by a rigid pipe section, wherein the rigid pipe section comprises a seamless steel pipe. This ensures a stable connection between the check valve, the switching valve, and the tee, guaranteeing structural stability during cyclic use.

[0008] Preferably, the reagent injection pipeline includes a reagent storage mechanism and a power mechanism. The tee joint is detachably connected to the reagent injection pipeline and to the gas well tree casing. One end of the tee joint used to connect to the switch valve is equipped with a sealing structure. This allows the reagent injection mechanism to be installed according to the gas well production cycle.

[0009] Preferably, the filling connector includes a double-threaded connector, and the switching valve includes a ball valve or a needle valve. The structure is simple and the opening degree of the switching valve can be adjusted according to actual conditions, thereby achieving adjustment of the filling pressure and speed, which is relatively convenient.

[0010] Preferably, a safety rope is provided between the filling connector and the check valve. The safety rope is connected to the hose between the filling connector and the check valve for positioning, and both ends of the safety rope extend at least beyond the filling connector and the check valve. Connecting the hose to the gas sampling tree structure near the hose via the safety rope stabilizes the hose's position during use, reduces the impact of internal pressure fluctuations on the hose connection points, and improves filling safety.

[0011] Preferably, the safety rope has connecting parts at both ends to facilitate connection between the two ends of the safety rope and the structure on the gas extraction tree.

[0012] Preferably, the system further includes a moving mechanism, on which the check valve, the switching valve, and the hose are positioned to limit their movement. This facilitates the operator's movement and use of the filling mechanism.

[0013] Preferably, the moving mechanism includes a trolley, the trolley is provided with a mounting plate, and the check valve and the switching valve are limited on the mounting plate.

[0014] Preferably, the moving mechanism is provided with a hose storage section to facilitate the movement and use of the hose along with the moving mechanism.

[0015] Preferably, the moving mechanism is provided with a tool storage section, which includes a limiting groove adapted to the filling connector. The filling connector includes at least two models. This allows operators to select the corresponding model of filling connector based on the reserved filling port model on the on-site oil pipe flange, avoiding the need to carry it with them.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides a gas production tree chemical injection mechanism, which can be temporarily installed between the gas production tree casing and the chemical injection pipeline through the injection joint, so that the existing chemical injection pipeline can simultaneously inject chemicals into the casing and the tubing. It has low cost and can be reused, avoiding the manpower and material costs of laying chemical injection pipelines for the entire tubing.

[0018] 2. This utility model provides a gas production tree chemical injection mechanism, which, through a flexible hose, can adapt to the temporary injection of chemicals into the tubing of multiple gas wells at different distances, and has a wide range of applications;

[0019] 3. This utility model provides a gas well preparation tree chemical injection mechanism that can be moved and used flexibly according to the actual needs of different gas well production stages and liquid accumulation conditions, thereby improving the utilization rate of equipment resources. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a gas-collecting tree agent dispensing mechanism according to Example 1. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of a gas-collecting tree agent dispensing mechanism according to Example 1. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the structure of a gas-collecting tree agent dispensing mechanism according to Example 1. Figure 3 .

[0023] Figure 4 This is a schematic diagram of the structure of a gas-collecting tree agent dispensing mechanism according to Example 1. Figure 4 .

[0024] Marked in the image:

[0025] 1-Addition connector, 2-Check valve, 3-Switch valve, 4-T-connector, 41-Sealing structure, 5-Gas source tree casing, 6-Reagent addition pipeline, 61-Reagent storage mechanism, 62-Power mechanism, 7-Hose, 81-First rigid pipe section, 82-Second rigid pipe section, 9-Safety rope, 91-Connecting component, 10-Moving mechanism, 101-Handrail, 102-Walking wheel, 103-Mounting plate, 104-Hose storage section, 105-Tool storage section. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0027] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0029] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0030] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0031] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0032] Example 1

[0033] like Figures 1-4 As shown, a gas tree chemical injection mechanism includes an injection connector 1, a check valve 2, a switch valve 3, and a tee connector 4 connected in sequence. The injection connector 1 can be adapted to connect to the reserved injection port on the oil pipe flange. The tee connector 4 is also connected to the gas tree casing 5 and the chemical injection pipeline 6. The check valve 2 is connected to the injection connector 1 through a hose 7. The hose 7 includes a high-pressure hose with a pressure resistance of not less than 10 MPa.

[0034] The injection connector 1 is a detachable connection connector adapted to the reserved injection port on the threaded flange of the tubing to achieve a tight connection with the wellhead tubing. The injection connector 1 is detachably connected to the check valve 2. The check valve 2 is a one-way valve structure used to limit the direction of chemical delivery. The check valve 2 is connected to the switch valve 3. The switch valve 3 is a valve structure used to realize the chemical injection and pause functions. The switch valve 3 is also detachably connected to the tee connector 4. The tee connector 4 is also connected to the tree casing 5 and the chemical injection pipeline 6. The tree casing 5 and the chemical injection pipeline 6 are existing pipelines laid at the wellhead. They are used to add chemicals through the casing during normal gas well production. The chemical injection pipeline 6 may include a chemical storage mechanism 61 and a power mechanism 62. The power mechanism 62 can transport the chemicals in the chemical storage mechanism 61 into the well along the pipeline.

[0035] In an optional embodiment, the filling connector 1 can be a double-threaded connector, the switching valve 3 can be a ball valve or a needle valve, and the connection between adjacent structures is preferably a threaded connection. The adapter required for the threaded connection can be set according to the actual situation.

[0036] In one or more implementations, such as Figure 1As shown, the check valve 2 and the switching valve 3 can be connected by the first rigid pipe section 81, and the switching valve 3 and the tee connector 4 can also be connected by the second rigid pipe section 82. Both the first rigid pipe section 81 and the second rigid pipe section 82 can be seamless steel pipes, which fixes the relative positions of the check valve 2, the switching valve 3 and the tee connector 4, making the connection stable. This ensures the structural stability during the cycle of use and facilitates the overall disassembly and reassembly of the check valve 2 and the switching valve 3 for reuse, thus improving the efficiency of secondary assembly and use.

[0037] In optional implementations, such as Figure 3 As shown, the tee connector 4 and the chemical injection line 6 are detachably connected, and the tee connector 4 and the tree casing 5 are detachably connected. The end of the tee connector 4 used to connect to the switch valve 3 is equipped with a sealing structure 41. For gas wells that do not require dewatering and chemical injection, the tee connector 4 can be removed, disconnecting the tree casing 5 and the chemical injection line 6, and then reinstalled when needed. In the early stages of the gas well's production cycle, the tee connector 4 can be blocked by the sealing structure 41, allowing the chemical injection line 6 to inject chemicals into the tree casing 5, ensuring normal gas well production. When the gas well requires periodic dewatering and dewatering from the tubing, the sealing structure 41 can be removed again, temporarily connecting the tee connector 4 and the switch valve 3, allowing the chemical injection line 6 to simultaneously inject chemicals into both the tubing and casing, enabling the chemical injection mechanism to be installed according to the gas well's production cycle.

[0038] In one or more implementations, such as Figure 2 As shown, a safety rope 9 can be installed between the filling connector 1 and the check valve 2. The safety rope 9 is connected to the hose 7 between the filling connector 1 and the check valve 2 for limiting the connection. Both ends of the safety rope 9 extend at least beyond the filling connector 1 and the check valve 2. In use, after the hose 7 is connected to the reserved filling port of the oil pipe, both ends of the safety rope 9 are fixed to the valves, handwheels, or other fixed structures on the gas production tree. The safety rope 9 bears and transmits the vibration of the hose 7, which can stabilize the position of the hose 7 during use, reduce the impact of internal pressure fluctuations on the hose connection, and improve filling safety.

[0039] In an optional embodiment, the safety rope 9 can be a nylon rope, which can be wrapped around the hose 7 and connected at multiple points to limit the relative position of the safety rope 9 and the hose 7.

[0040] In an optional embodiment, the safety rope 9 may be provided with connecting parts 91 at both ends to facilitate the connection of the two ends of the safety rope 9 to the structure on the gas extraction tree. The connecting parts 91 may be conventional structures such as hooks or straps.

[0041] In one or more implementations, such as Figure 4As shown, it also includes a moving mechanism 10. The check valve 2, the switch valve 3 and the hose 7 can be limited and set on the moving mechanism 10. When in use, the operator can use the moving mechanism 10 to carry the hose 7, the switch valve 3 and the check valve 2 to the site for assembly and use.

[0042] In an optional embodiment, the moving mechanism 10 can be a trolley with a handrail 101 on one side and a walking wheel 102 at the bottom. A mounting plate 103 can be fixed horizontally on the trolley. The check valve 2 and the switch valve 3 can be limited and set on the mounting plate 103. The hose 7 can be wound up and placed on the mounting plate 103.

[0043] In an optional embodiment, the check valve 2 and the switching valve 3 can be kept in a seamless steel pipe connection and are confined to the moving mechanism 10 as a whole. This can be achieved by binding them to the moving mechanism 10 with clamps or by temporarily holding them to the moving mechanism 10 with buckles.

[0044] In an optional embodiment, the hose 7 can be stored by a hose storage part 104 provided on the moving mechanism 10. The hose storage part 104 can be a reel fixedly provided on the moving mechanism 10, which can realize the winding and storage of the hose 7, and facilitates movement with the moving mechanism 10.

[0045] In an optional embodiment, the moving mechanism 10 may be provided with a tool storage section 105. The tool storage section 105 may include a limiting groove adapted to the filling connector 1. The filling connector 1 may include at least two models. Each model of the filling connector 1 may be provided with a corresponding limiting groove to achieve stable storage. This allows the operator to select the corresponding model of the filling connector 1 according to the reserved filling port model on the on-site oil pipe flange, avoiding the risk of loss due to carrying it with them.

[0046] This embodiment of a tree preparation chemical injection mechanism simultaneously injects chemicals into the casing and tubing via the existing chemical injection pipeline 6. This method is low-cost and reusable, avoiding the manpower and material costs of laying chemical injection pipelines across the entire tubing. By being temporarily installed between the tree casing 5 and the chemical injection pipeline 6, it can be moved and used flexibly according to the actual needs of different gas well production stages and fluid accumulation conditions, thus improving equipment resource utilization. At the same time, the flexible hose 7 structure can adapt to the temporary injection of chemicals into the tubing of multiple gas wells at different distances, making it widely applicable.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A chemical injection mechanism for aeration trees, characterized in that, The system includes a filling connector (1), a check valve (2), a switch valve (3), and a tee connector (4) connected in sequence. The filling connector (1) can be adapted to the reserved filling port on the oil pipe flange. The tee connector (4) is also connected to the gas production tree casing (5) and the reagent filling pipeline (6). The check valve (2) is connected to the filling connector (1) through a hose (7). The hose (7) includes a high-pressure hose (7) with a pressure resistance of not less than 10 MPa.

2. The aeration tree chemical injection mechanism according to claim 1, characterized in that, The check valve (2) and the switching valve (3) are connected by a first rigid pipe section (81), and the switching valve (3) and the tee joint (4) are connected by a second rigid pipe section (82). The first rigid pipe section (81) and the second rigid pipe section (82) are both seamless steel pipes.

3. The aeration tree chemical injection mechanism according to claim 2, characterized in that, The drug injection pipeline (6) includes a drug storage mechanism (61) and a power mechanism (62). The tee connector (4) and the drug injection pipeline (6) are detachably connected. The tee connector (4) and the gas harvesting tree casing (5) are detachably connected. The tee connector (4) is equipped with a sealing structure (41) at one end for connecting to the switch valve (3).

4. The aeration tree agent dispensing mechanism according to claim 3, characterized in that, The filling connector (1) includes a double-threaded connector, and the switching valve (3) includes a ball valve or a needle valve.

5. A gas-collecting tree agent dispensing mechanism according to any one of claims 1-4, characterized in that, A safety rope (9) is provided between the filling connector (1) and the check valve (2). The safety rope (9) is connected to the hose (7) between the filling connector (1) and the check valve (2) for limiting connection. The two ends of the safety rope (9) extend at least beyond the filling connector (1) and the check valve (2).

6. The aeration tree chemical injection mechanism according to claim 5, characterized in that, The safety rope (9) is provided with connecting parts (91) at both ends.

7. The aeration tree agent dispensing mechanism according to claim 5, characterized in that, It also includes a moving mechanism (10), on which the check valve (2), the switching valve (3) and the hose (7) are positioned.

8. The aeration tree agent dispensing mechanism according to claim 7, characterized in that, The moving mechanism (10) includes a trolley, which is provided with a mounting plate (103), and the check valve (2) and the switching valve (3) are limited and disposed on the mounting plate (103).

9. The aeration tree agent dispensing mechanism according to claim 8, characterized in that, The moving mechanism (10) is provided with a hose storage part (104).

10. A gas-producing tree agent dispensing mechanism according to claim 9, characterized in that, The moving mechanism (10) is provided with a tool storage part (105), the tool storage part (105) includes a limiting groove adapted to the filling connector (1), and the filling connector (1) includes at least two models.

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