Under-pressure sampler at output end of oil-gas well Christmas tree

Abstract

The utility model discloses an under-pressure sampler at an output end of a Christmas tree of an oil and gas well, relates to the technical field of oil and gas exploitation, and aims to solve the problems of insufficient sealing, complicated operation, low automation degree and poor safety in the prior art. The sampler comprises a three-way connector, a sampling assembly, a gas separator, a gas-liquid separator, an on-off piston, a manual control opening and closing device and a controlled sampling core. The three-way connector is communicated with a Christmas tree high-pressure valve, and efficient sealing is achieved; the manual control opening and closing device accurately controls opening and closing of the on-off piston according to the lever principle; the controlled sampling core is used for adjusting pores between the porous disc and the porous seat, so that the sampling efficiency is adjusted. Due to the arrangement of the gas separator and the control valve, gas and solid-liquid separation is guaranteed. The device realizes timing, quantitative and constant-efficiency sampling control, has high automation degree and safety, is simple, convenient and reliable to operate, and is suitable for different sampling requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas exploitation, and in particular relates to a pressure sampler at the output end of an oil tree of an oil and gas well. Background Art

[0002] In the process of oil and gas well sampling, traditional samplers usually face several technical problems, including insufficient sealing, complex operation, poor safety, low automation, and difficulty in accurately controlling sampling efficiency and time, etc. These problems seriously affect the efficiency of oil and gas well sampling and the accuracy of sampling results.

[0003] First, insufficient sealing is a major problem faced by traditional samplers. Due to the high pressure environment of oil and gas wells, traditional samplers are prone to poor sealing when connected to the port of the Christmas tree, resulting in oil and gas leakage during the sampling process, which not only affects the sampling results, but also poses a threat to the safety of operators.

[0004] Secondly, the operation of traditional samplers is usually complicated, requiring manual adjustment and control of multiple steps. Operators not only need to have a high level of technical skills, but also need to monitor the sampling process at all times, which is difficult to operate and has high work intensity.

[0005] In addition, the traditional sampler has a low degree of automation, making it difficult to achieve precise control of the sampling process. The sampling efficiency and time are often difficult to adjust, and cannot meet the requirements for sampling duration and efficiency in different situations. At the same time, the mixture of solids, liquids and gases in oil and gas wells is difficult to effectively separate, further reducing the accuracy and reliability of the sampling results.

[0006] In addition, traditional samplers generally lack safety measures, and their on-off control is unstable, which makes it easy for unexpected situations to occur during the sampling process, such as sampling interruption, oil and gas leakage, etc., which seriously threaten the safety of operators and the stability of equipment.

[0007] These existing problems highlight the shortcomings of current oil and gas well sampling technology. There is an urgent need for a sampling device that can be stably sealed under high pressure, easy to operate, highly automated, and highly secure, in order to improve sampling efficiency and accuracy of results, and to ensure the safety of operators. The new oil and gas well sampling device should have good sealing performance, be able to maintain a stable and reliable sealing state under high pressure; adopt a convenient operation method to reduce manual intervention and realize automatic control of the sampling process; have the function of accurately adjusting the sampling efficiency and time, and can effectively separate solids, liquids and gases to ensure the accuracy and reliability of the sampling results; at the same time, the design is safe and reliable, with an automatic plugging function, which can automatically terminate the sampling process after the sampling is completed, to ensure the safety and convenience of the overall operation.

[0008] In view of this, the present utility model is proposed. Utility Model Content

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0010] A pressurized sampler at the output end of an oil and gas well Christmas tree, comprising:

[0011] One end of the three-way interface is connected to a high-pressure valve at a port on one side of the Christmas tree;

[0012] The sampling assembly is arranged below the three-way interface and is arranged in a sealed state.

[0013] The gas separator is fixedly connected to the bottom end of the three-way interface, the bottom end of the gas separator is sealed and fixed to the top end of the sampling assembly, and an independent gas circulation space is provided in the gas separator;

[0014] A plurality of gas-liquid separators are connected in a surrounding manner and arranged on the inner wall of the gas separator;

[0015] The on-off piston is slidably arranged on the inner wall of the three-way interface, and is used to control the on-off of the three-way interface and the gas separator;

[0016] The manual opener and closeer is arranged at the top of the three-way interface, and utilizes the lever force to drive the sliding displacement of the on-off piston;

[0017] The controlled sampling core is installed below the on-off piston and is installed at the bottom end of the three-way interface.

[0018] Preferably, a sealing head for installing a manual opener and closer is fixedly connected to the top of the three-way interface, and a support ring is fixedly connected to the inner wall of the three-way interface, and the support ring fits and slides on the surface of the manual opener and closer.

[0019] Preferably, the gas separator includes an air pressure chamber fixedly connected to the bottom end of the three-way interface, the inner wall of the air pressure chamber is sealed with two inner sleeves for isolation, and one side of the air pressure chamber is connected to a control valve for controlling the gas output.

[0020] Preferably, the manual opener and closeer comprises a support column fixedly connected to the upper surface of the head cover, the top of the support column is fixedly connected to a pin shaft seat, one side of the pin shaft seat is movably connected to a deflection block through a pin shaft, and the left side of the deflection block is fixedly connected to a handle;

[0021] The bottom end of the deflection block is movably connected to two adapter plates via a pin shaft, and the opposite surfaces of the two adapter plates are movably connected to a pull cylinder via a pin shaft. The bottom end of the pull cylinder is fixed on the surface of the on-off piston, and the support ring slides in a close fit on the arc-shaped side wall of the pull cylinder.

[0022] Preferably, the gas-liquid separator includes a bent pipe penetrating and connected to the inner wall of the inner sleeve, the bent pipe axially seals and slides through a vertical guide rod, a hanging ball for preventing falling off is fixed to the top of the vertical guide rod, a low-density floating block is fixedly connected to the bottom end of the vertical guide rod, and a sealing plug for sealing the bottom end of the bent pipe is fixedly connected to the upper surface of the low-density floating block.

[0023] Preferably, the controlled sampling core includes a porous seat fixedly connected to the bottom end of the three-way interface, a porous disk is rotatably arranged below the porous seat, a rotating shaft is rotatably connected to the upper surface of the porous disk, the rotating shaft seal passes through the inner wall of the pull cylinder, and a torsion block is fixed to the top of the rotating shaft.

[0024] Preferably, the sampling assembly includes a sampling seat connected to the bottom end of the air pressure chamber, a sample bottle is slidably arranged on the inner wall of the sampling seat, a threaded pressure seat is arranged on the surface of the sample bottle for pressing it against the inner wall of the sampling seat, and the threaded pressure seat cooperates with the inner wall thread of the sampling seat.

[0025] Preferably, the three-way interface and the end opposite to the gas separator jointly clamp a flow focusing bucket, the flow focusing bucket axially penetrates two inner sleeves, and a plurality of gas-liquid separators are arranged around the flow focusing bucket in a surrounding shape.

[0026] Beneficial effects:

[0027] When this solution is in use, under the pressure of the oil and gas well, the high pressure of the Christmas tree is connected to the three-way interface, and its pressure support acts on the upper part of the on-off piston, so that the on-off piston is tightly fitted to the inner wall of the three-way interface to keep it closed. The greater the pressure, the higher the sealing degree, which has a very high guarantee for the overall safety;

[0028] At the same time, a manual opener and closer is used, which adopts the principle of lever. When the arm applies force, it can flip between the deflection block and the pin shaft seat under the action of the lever force. In this process, the deflection block pulls the two adapters, so that the pull cylinder pulls the on-off piston upward, so that the on-off piston is in the open state. At this time, based on the vertical downward pulling force of the pull cylinder and the adapter, the handle is in the state of being in contact with the pin shaft seat in this direction. When the hand is released, it will not reset under the action of pressure, ensuring that the on-off piston is continuously in the open state;

[0029] Before use, the sampling efficiency is adjusted according to the needs of sampling. The sampling efficiency is not the sampling speed. The wrench is used to rotate the twist block, and the twist block rotates the porous disk with the controlled sampling core through the rotating shaft. When the porous disk rotates, the pore misalignment amplitude between the porous disk and the porous seat changes, which can adjust the obstruction state of oil and gas passing through, thereby adjusting the sampling efficiency. When the pull tube moves upward, the adjusted porous disk moves upward and fits on the lower surface of the porous seat, so that the pores and overlapping positions are in a connected state. This method can not only adjust the passing efficiency, but also prevent the oil and gas from flowing downward due to gravity, and the gas below flows upward, which has a good protection effect.

[0030] After the above operations, the gas in the sampling component can be discharged by opening the control valve of the gas separator. The opening amplitude of the control valve is the change of the gas outlet speed, which directly controls the sampling speed. Combined with the change of the efficiency of the controlled sampling core adjustment, long or short sampling operations can be performed. During the sampling process, the solid and liquid of the oil and gas wells are stored in the sample bottle, and the gas output is discharged and collected through the control valve. The overall operation not only realizes the timed and quantitative collection control, but also realizes the sampling method of gas and solid-liquid separation.

[0031] At the same time, if the sample bottle is full, its low-density float can float up, and under the guidance of the vertical guide rod, the plug is inserted into the bottom of the bent tube to seal it, so that it cannot escape air, and the sampling process is terminated. After the staff resets the on-off piston under the control of the manual opener, the threaded pressure seat can be disassembled to take out the sample bottle to complete the sampling;

[0032] In summary, this solution not only realizes the controllability of sampling time and sampling efficiency, and meets the continuous sampling of oil and gas wells for different durations, but also has a safe and reliable design, stable on-off control and easy operation, as well as the function of automatic sealing after sampling is completed, thus ending sampling. It has a very high guarantee for safety and is extremely reliable and convenient to operate.

[0033] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In the attached picture:

[0035] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0036] Figure 2 It is a three-dimensional structural schematic diagram of the present invention from another viewing angle;

[0037] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0038] Figure 4 A further schematic cross-sectional structure diagram of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the cross section of the present invention;

[0040] Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of a gas separator of the present invention;

[0041] Figure 7 It is a schematic structural diagram of the cross section of the gas separator of the present invention.

[0042] In the figure: 1. three-way interface; 2. gas separator; 21. air pressure chamber; 22. inner sleeve; 23. control valve; 3. sampling assembly; 31. sampling seat; 32. threaded pressure seat; 33. sample bottle; 4. gas-liquid separator; 41. elbow; 42. vertical guide rod; 43. low-density float; 44. plug; 45. hanging ball; 5. manual opener and closer; 51. pull cylinder; 52. adapter; 53. deflection block; 54. pin seat; 55. handle; 56. support column; 6. controlled sampling core; 61. rotating shaft; 62. porous disk; 63. porous seat; 7. head; 8. on-off piston; 9. support ring; 10. twist block; 11. flow collector. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0044] like Figures 1 to 7 As shown, a pressurized sampler at the output end of an oil and gas well Christmas tree comprises:

[0045] One end of the three-way interface 1 is connected to the high-pressure valve at one end of the Christmas tree;

[0046] The sampling component 3 is arranged below the three-way interface 1, and the sampling component 3 is arranged in a sealed state.

[0047] The gas separator 2 is fixedly connected to the bottom end of the three-way interface 1, and the bottom end of the gas separator 2 is sealed and fixed to the top end of the sampling assembly 3. An independent gas circulation space is provided in the gas separator 2;

[0048] A plurality of gas-liquid separators 4 are arranged in a surrounding manner and connected to the inner wall of the gas separator 2;

[0049] The on-off piston 8 is slidably disposed on the inner wall of the three-way interface 1, and is used to control the on-off of the three-way interface 1 and the gas separator 2;

[0050] The manual opener and closeer 5 is arranged at the top of the three-way interface 1, and uses the lever force to drive the sliding displacement of the on-off piston 8;

[0051] The controlled sampling core 6 is installed below the on-off piston 8 , and the controlled sampling core 6 is installed at the bottom end of the three-way interface 1 .

[0052] Through the connection between the three-way interface 1 and the high-pressure valve of the Christmas tree, the on-off piston 8 under high pressure is used to achieve efficient sealing. As the pressure increases, the sealing is stronger, which greatly improves the safety of the sampling process. Secondly, the manual opener and closeer 5 uses the principle of lever. When the arm applies force, the opening and closing of the on-off piston 8 can be accurately controlled to ensure that the on-off piston 8 is in a continuously open state to avoid accidental reset, so that the operation is stable and reliable. In addition, the controlled sampling core 6 can flexibly adjust the sampling efficiency by adjusting the pores between the porous disk 62 and the porous seat 63 to meet the sampling requirements under different conditions, effectively prevent the flow of oil and gas under the action of gravity, and enhance the protection effect. During the sampling process, opening the control valve 23 of the gas separator 2 can realize the separation of gas and solid-liquid, realize the controllable sampling time, and ensure the accuracy and efficiency of sampling. Finally, the low-density floating block 43 automatically blocks the elbow 41 when the sample bottle 33 is full, terminates the sampling process, and completes the sampling in combination with the reset of the manual opener and closeer 5, further ensuring the simplicity of operation and the reliability of the equipment. In summary, this solution not only significantly improves the controllability of sampling time and efficiency, ensures the stability and accuracy of long or short time sampling, but also ensures the safety of operation through multiple designs, making the entire sampling process more automated, the operation more convenient and reliable, and ultimately improving product quality and work efficiency.

[0053] Specifically, Figure 3 As shown: a sealing head 7 for installing a manual opener 5 is fixedly connected to the top of the three-way interface 1, and a supporting ring 9 is fixedly connected to the inner wall of the three-way interface 1, and the supporting ring 9 fits and slides on the surface of the manual opener 5.

[0054] By setting the sealing head 7, the top of the three-way interface 1 can be closed, and at the same time, it can provide a good supporting effect on the manual opener 5. By setting the supporting ring 9, the supporting ring 9 can support the pull tube 51 and at the same time avoid the accumulation of oil and gas in the three-way interface 1 and make it difficult to clean.

[0055] Specifically, Figure 7 As shown: the gas separator 2 includes an air pressure chamber 21 fixedly connected to the bottom end of the three-way interface 1, the inner wall of the air pressure chamber 21 is sealed with two inner sleeves 22 for isolation, and one side of the air pressure chamber 21 is connected to a control valve 23 for controlling the gas output.

[0056] The inner sleeve 22 is located on the inner wall of the air pressure chamber 21, which can protect the air pressure chamber 21 and form a chalk space inside it. The two inner sleeves 22 are fitted against each other and inserted at both ends of the air pressure chamber 21, which can facilitate installation. At the same time, the fixed clamping force at both ends can maintain a clamping force to create a better seal.

[0057] Specifically, Figure 5 As shown: the manual opener 5 comprises a support column 56 fixedly connected to the upper surface of the head 7, the top of the support column 56 is fixedly connected to a pin seat 54, one side of the pin seat 54 is movably connected to a deflection block 53 through a pin, and the left side of the deflection block 53 is fixedly connected to a handle 55;

[0058] The bottom end of the deflection block 53 is movably connected to two adapter plates 52 via a pin shaft, and the opposite surfaces of the two adapter plates 52 are movably connected to a pull cylinder 51 via a pin shaft. The bottom end of the pull cylinder 51 is fixed on the surface of the on-off piston 8, and the support ring 9 slides on the arc-shaped side wall of the pull cylinder 51.

[0059] The overall design of controlled opening and closing enables the force applied by the operator to be effectively transmitted to the on-off piston 8 through the lever principle, thereby achieving precise control, and through the cooperation of the pin shaft and the adapter plate 52, ensuring a firm connection and smooth transmission between the components. The forces acting on the overall open and closed states are both vertical downward pulling forces, so that both the open and closed states can be maintained.

[0060] Specifically, Figure 6 As shown: the gas-liquid separator 4 includes a curved pipe 41 that penetrates and is connected to the inner wall of the inner sleeve 22, and a vertical guide rod 42 is axially sealed and slides through the curved pipe 41. A hanging ball 45 for preventing falling off is fixed to the top of the vertical guide rod 42, and a low-density floating block 43 is fixedly connected to the bottom end of the vertical guide rod 42, and a sealing plug 44 for sealing the bottom end of the curved pipe 41 is fixedly connected to the upper surface of the low-density floating block 43.

[0061] The vertical guide rod 42 can guide the axial movement control of the low-density floating block 43, and at the same time can ensure that the plug 44 can accurately enter the bottom end of the curved pipe 41 to achieve plugging.

[0062] Specifically, Figure 5 As shown: the controlled sampling core 6 includes a porous seat 63 fixedly connected to the bottom end of the three-way interface 1, a porous disk 62 is rotatably arranged below the porous seat 63, a rotating shaft 61 is rotatably connected to the upper surface of the porous disk 62, the rotating shaft 61 seals and penetrates the inner wall of the pull tube 51, and a torsion block 10 is fixed to the top of the rotating shaft 61.

[0063] The porous seat 63 is stably fixed at the bottom end of the three-way interface 1 to provide basic support for sampling. A porous disk 62 is rotatably arranged below the porous seat 63. The porous disk 62 can rotate freely below the porous seat 63, and its rotation position and angle affect the size of the pores through which the oil and gas resources flow. The upper surface of the porous disk 62 is rotatably connected by a rotating shaft 61, and the rotating shaft 61 provides support for the rotation of the porous disk 62. At the same time, the porous disk 62 moves with the lifting and lowering of the pull tube 51, and can be fitted with the porous seat 63.

[0064] Specifically, Figure 2 As shown: the sampling assembly 3 includes a sampling seat 31 connected to the bottom end of the air pressure chamber 21, a sample bottle 33 is slidably arranged on the inner wall of the sampling seat 31, and a threaded pressing seat 32 is arranged on the surface of the sample bottle 33 for pressing it on the inner wall of the sampling seat 31, and the threaded pressing seat 32 is matched with the inner wall thread of the sampling seat 31.

[0065] The sampling seat 31 can seal and fix the sample bottle 33 through the cooperation of the threaded pressing seat 32, and the improved structure is simple, the connection is convenient, the sealing performance and reliability are high, and the safety is guaranteed.

[0066] Specifically, Figure 4 and Figure 5 As shown, the three-way interface 1 and the end opposite to the gas separator 2 jointly clamp a flow focusing bucket 11, the flow focusing bucket 11 axially penetrates two inner sleeves 22, and a plurality of gas-liquid separators 4 are arranged around the flow focusing bucket 11 in a surrounding shape.

[0067] The flow concentrator 11 can converge the sample and introduce it into the sample bottle 33, and can also effectively prevent splashing to the gas-liquid separator 4 and causing blockage, thereby ensuring the reliability of use.

[0068] When the present solution is in use, the Christmas tree is connected to the three-way interface 1, and its pressure support acts on the top of the on-off piston 8, so that the on-off piston 8 is closely attached to the inner wall of the three-way interface 1 and remains closed. At the same time, the manual opener 5 adopts the principle of a lever. When the arm applies a force, it can flip between the deflection block 53 and the pin shaft seat 54 under the action of the lever force. In this process, the deflection block 53 pulls the two adapter plates 52, so that the pull cylinder 51 pulls the on-off piston 8 to move upward, so that the on-off piston 8 is in an open state. At this time, based on the vertical downward pulling force of the pull cylinder 51 and the adapter plate 52 on the deflection block 53, the handle 55 is in a state of being attached to the pin shaft seat 54 in this direction. When the hand is released, it will not be reset under the action of pressure, ensuring that the on-off piston 8 is continuously in an open state.

[0069] Before use, the sampling efficiency is adjusted according to the sampling needs. The sampling efficiency is not the sampling speed. The twist block 10 is rotated by a wrench. The twist block 10 rotates with the porous disk 62 of the controlled sampling core 6 through the rotating shaft 61. When the porous disk 62 rotates, the pore misalignment amplitude between the porous seat 63 changes, which can adjust the obstruction state of oil and gas passing through, thereby adjusting the sampling efficiency. When the pull tube 51 moves upward, the adjusted porous disk 62 moves upward and fits on the lower surface of the porous seat 63, so that the pores and overlapping positions are in a connected state.

[0070] By opening the control valve 23 of the gas separator 2, the gas in the sampling component 3 can be discharged. The opening range of the control valve 23 is the change in the gas outlet speed, which directly controls the sampling speed. Combined with the change in the efficiency adjusted by the controlled sampling core 6, long-term or short-term sampling operations can be performed. During the sampling process, the solid and liquid of the oil and gas wells are stored in the sample bottle 33, and the gas output is discharged and collected through the control valve 23.

[0071] At the same time, if the sample bottle 33 is full, its low-density float 43 can float up, and under the guidance of the vertical guide rod 42, the plug 44 is inserted into the bottom end of the curved tube 41 to seal it, so that it cannot escape air, thereby terminating the sampling process. After the staff resets the on-off piston 8 under the control of the manual opener 5, the threaded pressure seat 32 can be disassembled to take out the sample bottle 33 to complete the sampling.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressurized sampler at the output end of an oil and gas well Christmas tree, characterized in that: include: Three-way interface (1); One end of the three-way interface (1) is connected to a high-pressure valve at a port on one side of the Christmas tree; Sampling assembly (3); The sampling component (3) is arranged below the three-way interface (1), and the sampling component (3) is arranged in a sealed state. Gas separator (2); The gas separator (2) is fixedly connected to the bottom end of the three-way interface (1), the bottom end of the gas separator (2) is sealed and fixed to the top end of the sampling assembly (3), and an independent gas circulation space is provided in the gas separator (2); A plurality of gas-liquid separators (4); A plurality of gas-liquid separators (4) are arranged in a surrounding manner and in communication with each other on the inner wall of the gas separator (2); On-off piston (8); The on-off piston (8) is slidably arranged on the inner wall of the three-way interface (1) and is used to control the on-off of the three-way interface (1) and the gas separator (2); Manual opener and closeer (5); The manual opener (5) is arranged at the top end of the three-way interface (1) and utilizes the lever force to drive the sliding displacement of the on-off piston (8); Controlled sampling core (6); The controlled sampling core (6) is installed below the on-off piston (8), and the controlled sampling core (6) is installed at the bottom end of the three-way interface (1).

2. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 1, characterized in that: The top end of the three-way interface (1) is fixedly connected to a sealing head (7) for installing a manual opener (5), and the inner wall of the three-way interface (1) is fixedly connected to a support ring (9), and the support ring (9) fits and slides on the surface of the manual opener (5).

3. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 1, characterized in that: The gas separator (2) comprises an air pressure chamber (21) fixedly connected to the bottom end of the three-way interface (1), the inner wall of the air pressure chamber (21) is sealed with two inner sleeves (22) for isolation, and one side of the air pressure chamber (21) is connected to a control valve (23) for controlling the gas output.

4. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 2, characterized in that: The manual opener (5) comprises a support column (56) fixedly connected to the upper surface of the sealing head (7), the top end of the support column (56) is fixedly connected to a pin shaft seat (54), one side of the pin shaft seat (54) is movably connected to a deflection block (53) via a pin shaft, and the left side of the deflection block (53) is fixedly connected to a handle (55); The bottom end of the deflection block (53) is movably connected to two adapter plates (52) via a pin, and the opposite surfaces of the two adapter plates (52) are movably connected to a pull cylinder (51) via a pin. The bottom end of the pull cylinder (51) penetrates and is fixed on the surface of the on-off piston (8), and the support ring (9) slides in contact with the arc-shaped side wall of the pull cylinder (51).

5. The pressurized sampler at the output end of the Christmas tree of an oil and gas well according to claim 3, characterized in that: The gas-liquid separator (4) comprises a curved pipe (41) penetrating and communicating with the inner wall of the inner sleeve (22); a vertical guide rod (42) is axially sealed and slidably penetrated by the curved pipe (41); a hanging ball (45) for preventing falling off is fixed to the top of the vertical guide rod (42); a low-density floating block (43) is fixedly connected to the bottom end of the vertical guide rod (42); and a sealing plug (44) for sealing the bottom end of the curved pipe (41) is fixedly connected to the upper surface of the low-density floating block (43).

6. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 4, characterized in that: The controlled sampling core (6) includes a porous seat (63) fixedly connected to the bottom end of the three-way interface (1), a porous disk (62) is rotatably arranged below the porous seat (63), a rotating shaft (61) is rotatably connected to the upper surface of the porous disk (62), the rotating shaft (61) is sealed and penetrates the inner wall of the pull cylinder (51), and a torsion block (10) is fixed to the top of the rotating shaft (61).

7. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 5, characterized in that: The sampling assembly (3) comprises a sampling seat (31) connected to the bottom end of the air pressure chamber (21), a sample bottle (33) is slidably arranged on the inner wall of the sampling seat (31), and a threaded pressing seat (32) is arranged on the surface of the sample bottle (33) for pressing it against the inner wall of the sampling seat (31), and the threaded pressing seat (32) is threadedly matched with the inner wall of the sampling seat (31).

8. The pressurized sampler at the output end of an oil and gas well Christmas tree according to claim 1, characterized in that: The three-way interface (1) and the end opposite to the gas separator (2) jointly clamp a flow focusing bucket (11), the flow focusing bucket (11) axially penetrates two inner sleeves (22), and a plurality of gas-liquid separators (4) are arranged around the flow focusing bucket (11) in a surrounding shape.

Images