Bidirectional valve body type sampling device and sampling pipeline

Abstract

The utility model discloses a two-way valve body type sampling device and a sampling pipeline, and relates to the technical field of oil exploitation, the sampling device comprises a valve pipe, the side wall of the valve pipe is provided with an upper return pipe and a lower sampling pipe, the upper end of the valve pipe is a sealing plate, and the lower end of the valve pipe is open; the inner wall of the valve pipe is fixedly connected with an upper valve seat and a lower valve seat, the upper valve seat is positioned between the upper feedback pipe and the lower sampling pipe, and the lower valve seat is positioned below the lower sampling pipe; the sealing plate is in linear transmission connection with a valve rod, a valve element is arranged at the lower end of the valve rod, the valve element is located between the upper valve seat and the lower valve seat, and the valve element and the upper valve seat or the lower valve seat can be sealed in a setting mode. According to the utility model, the internal structure of the sampling valve is improved, and dead oil is not required to be treated in the sampling work, so that the problem that the dead oil needs to be completely discharged firstly when a worker samples is solved, and the workload of subsequently treating the dead oil can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil exploitation, and concretely relates to a two-way valve body type sampling device and sampling pipeline. BACKGROUND

[0002] At present, in the oil well production process, oil well sampling and testing is an important work, and taking full and accurate oil samples is the basic requirement of daily production and an important production task. According to the site conditions, the sampling work needs to be sampled through the sampling gate on the oil well wellhead process. The sampling gate is installed on the flow guide pipe, and the flow guide pipe is installed at the oil well wellhead standpipe. According to the specification requirements, the sampling gate flow guide pipe needs to be made into a 45° angle, and the depth is half of the inner diameter of the process vertical guide pipe, so as to ensure the accuracy of sampling. The sampling gate is opened during use to make the oil sample flow into the sampling barrel. At present, the flow guide pipe applied in the field has a certain excess length outside the process, about 20 cm. When the oil well is not sampled, the liquid in the flow guide pipe cannot flow, and due to the influence of factors such as oil properties and external temperature, the part of the oil will solidify, forming the so-called dead oil in the field. The existence of dead oil has a certain influence on the flow of oil in the sampling work, and also greatly affects the accuracy of oil testing. According to the specification requirements of the oil production worker, the oil well needs to be sampled once every three days in normal production, and the dead oil needs to be discharged before sampling, so the problem of large dead oil production and large processing workload in the sampling work has been serious, and it also involves environmental protection, transportation cost, subsequent treatment and other cost problems.

[0003] In view of such problems, a two-way valve body type sampling device is designed. The device improves the structure in the sampling flow guide pipe, realizes that the dead oil generated in the wellhead sampling process no longer needs to be treated. By using the device, the purpose of reducing the labor intensity of workers and reducing the operating cost of the work processing dead oil can be achieved.

[0004] Publication No. CN106401581B discloses a flow interception sampler, which comprises a sampling pipe cylinder, a three-way valve and a power device. The sampling pipe cylinder is a cylinder with an open left end and a closed right end. The left end of the sampling pipe cylinder is an inlet hole and is fixedly installed with one of the outlets of the three-way valve. A sampling port is arranged on the left cylinder wall of the sampling pipe cylinder. An overflow valve is fixedly installed outside the sampling pipe cylinder at the sampling port. An outlet is arranged on the right cylinder wall of the sampling pipe cylinder. Through the reversing of the three-way valve, crude oil can be intercepted in the sampling pipe cylinder.

[0005] The existing technology needs to use a motor to provide power for sampling, and the layout cost is relatively high.

[0006] CN114719033B discloses an oil well valve, which can be used for oil sampling operation. When the oil sampling operation is performed, the open end of the valve body can be inserted into the inside of the oil outlet pipe. The oil can flow out from the oil outlet of the outlet pipeline directly after entering the valve body, and cannot be accumulated in the valve body and the outlet pipeline. The oil sampling operation can be performed immediately.

[0007] The prior art still has residual crude oil in the valve body and the outlet pipeline after sampling, which forms dead oil and needs to be treated.

[0008] CN215595570U discloses a novel oil well sampling device. When used, the sampling valve is opened, the hand wheel is counterclockwise rotated, the valve rod is driven to move to the right, the produced liquid pushes the valve ball, and the produced liquid flows into the sample cylinder through the liquid inlet, the flow passage, the center hole, the liquid outlet, and the liquid outlet sampling elbow. After sampling is completed, the hand wheel is clockwise rotated, the valve rod is driven to move to the left, and the valve rod pushes the valve ball to close.

[0009] The prior art still has residual crude oil in the center hole after sampling, which forms dead oil and needs to be treated.

[0010] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above disclosed technologies are different from those of the present utility model. The above disclosed technology documents do not have technical inspiration for more technical features, technical problems to be solved, and beneficial effects of the present utility model. Utility model content

[0011] In view of the above defects of the prior art, the utility model aims to provide a bidirectional valve body type sampling device and a sampling pipeline.

[0012] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0013] On the one hand, the utility model provides a bidirectional valve body type sampling device, which comprises a valve pipe. The side wall of the valve pipe is provided with an upper backflow pipe and a lower sampling pipe. The upper end of the valve pipe is a closed plate, and the lower end of the valve pipe is open. The inner wall of the valve pipe is fixedly connected with an upper valve seat and a lower valve seat. The upper valve seat is located between the upper backflow pipe and the lower sampling pipe, and the lower valve seat is located below the lower sampling pipe. The closed plate is linearly connected with a valve rod. The lower end of the valve rod is provided with a valve core. The valve core is located between the upper valve seat and the lower valve seat, and the valve core can be seated with the upper valve seat or the lower valve seat.

[0014] Further, the valve rod is a lead screw, and the center of the closed plate is provided with a through hole.

[0015] Specifically, the lower end surface of the closed plate is provided with a screw sleeve. The hole diameter of the screw sleeve is the same as that of the through hole. The lead screw is threadedly connected with the screw sleeve.

[0016] Further, the upper end face of the closing plate is provided with a packing sleeve, the packing sleeve has a larger hole diameter than the through hole, and the packing sleeve is filled with a sealing packing between the screw rod;

[0017] Specifically, the sealing packing is provided with a packing pressing ring at the upper end, the packing sleeve is connected with a pressing cap at the upper end, the pressing cap presses the packing pressing ring downward, and the packing pressing ring presses the sealing packing tightly.

[0018] Further, the upper end of the screw rod is provided with a tool handle for connecting a rotating tool.

[0019] Further, the rotating tool is a hand wheel.

[0020] Further, the upper valve seat is provided with a first conical seat at the lower end face, and the lower valve seat is provided with a second conical seat at the upper end face.

[0021] Specifically, the valve core is provided with a first conical head at the upper end and a second conical head at the lower end.

[0022] Specifically, the first conical seat has a center hole with a larger diameter than the small-diameter end of the first conical head, and the second conical seat has a center hole with a larger diameter than the small-diameter end of the second conical head.

[0023] In the second aspect, the utility model provides a kind of sampling pipeline, including oil pipeline, main control valve is arranged on the oil pipeline, and further include the two-way valve body formula sampling device of one aspect;The lower branch pipe is arranged in the lower end of the oil pipeline in back pressure valve, the upper branch pipe is arranged in the upper end of the oil pipeline in back pressure valve, the lower branch pipe is connected with lower sampling pipe by lower control valve, and the upper branch pipe is connected with upper back feeding pipe by upper control valve.

[0024] Further, the main control valve is a back pressure valve; the upper control valve and the lower control valve are ball valves.

[0025] Compared with prior art, the utility model has the following beneficial effects:

[0026] 1. The utility model improves the internal structure of the sampling device, which can realize internal circulation before sampling, eliminate the drawbacks of the drainage tube in the crude oil sampling device, and clean the dead oil through circulation, so that the dead oil does not need to be treated during sampling, and fresh oil sample can be directly collected during sampling, which solves the problem that workers need to discharge dead oil first during sampling and reduces the workload of subsequent dead oil treatment.

[0027] 2. The utility model improves the butt joint structure of the sampling device. The conventional sampling device needs to be accurately and safely connected to the beveled port position, otherwise the sampling accuracy will be affected. The improved internal circulation structure does not need to install a short circuit, does not need to consider the installation position of the short circuit beveled port, greatly reduces the operation difficulty in the installation process, and can effectively guarantee the sampling accuracy.

[0028] 3、The utility model discloses a comparison original operation method can flush the dead oil originally as the discarded oil into the pipe transportation flow, improves the crude oil production to some extent, finally reaches the purpose of reducing the labor intensity of worker, reducing the work cost, improving the sampling accuracy, improving the economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure schematic diagram of a kind of bidirectional valve body type sampling device in the utility model;

[0030] Figure 2 It is the structure schematic diagram of a kind of sampling pipeline.

[0031] In the drawing: 1, hand wheel;2, screw;3, packing sleeve;4, valve pipe;5, upper back transport pipe;6, upper valve seat;7, lower sampling pipe;8, valve core;9, lower valve seat;10, sealing packing;11, packing ring;12, pressure cap;13, screw sleeve;20, oil pipeline;21, back pressure valve;22, lower branch pipe;23, upper branch pipe;24, upper control valve;25, lower control valve. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] Example 1:

[0034] Please refer to Figure 1 The utility model provides a kind of bidirectional valve body type sampling device, including valve pipe 4, the upper back transport pipe 5 of valve pipe 4 side wall is arranged, lower sampling pipe 7, the upper end of valve pipe 4 is closed plate, the lower end of valve pipe 4 is open, the inner wall of valve pipe 4 is fixedly connected upper valve seat 6, lower valve seat 9, the upper valve seat 6 is between upper back transport pipe 5, lower sampling pipe 7, the lower valve seat 9 is below lower sampling pipe 7, valve pipe 4 upper end is equipped with screw 2, screw 2 is threadedly connected with valve pipe 4 and is sealed, screw 2 lower end is fixedly set valve core 8, valve core 8 is between upper valve seat 6 and lower valve seat 9, valve core 8 can be sealed with upper valve seat 6 or lower valve seat 9.

[0035] Specifically, the closure plate is provided with a through hole in the center, the upper end surface of the closure plate is provided with a packing sleeve 3, the lower end surface of the closure plate is provided with a screw sleeve 13, the hole diameter of the packing sleeve 3 is larger than that of the through hole, the hole diameter of the screw sleeve 13 is the same as that of the through hole, the lead screw 2 is threadedly connected with the screw sleeve 13, the packing sleeve 3 and the lead screw 2 are filled with a sealing packing 10, the upper end of the sealing packing 10 is provided with a packing pressing ring 11, the upper end of the packing sleeve 3 is connected with a pressing cap 12, the pressing cap 12 presses down the packing pressing ring 11, the packing pressing ring 11 presses the sealing packing 10 tightly, and the sealing packing 10 extrudes the lead screw 2 to achieve the sealing function.

[0036] Specifically, the upper end of the lead screw 2 is provided with a tool handle for connecting a rotating tool, preferably the rotating tool is a hand wheel 1.

[0037] Specifically, the lower end surface of the upper valve seat 6 is provided with a first conical seat, the upper end surface of the lower valve seat 9 is provided with a second conical seat, the upper end of the valve core 8 is provided with a first conical head, and the lower end of the valve core 8 is provided with a second conical head, the central hole diameter of the first conical seat is larger than the small diameter end diameter of the first conical head, and the central hole diameter of the second conical seat is larger than the small diameter end diameter of the second conical head, so that the valve core 8 can completely seal the first conical seat or the second conical seat.

[0038] Specifically, the valve core 8 is connected with the lead screw 2 through threads, is fastened through pre-tightening force, and is sealed through raw material belts or thread engagement.

[0039] During sampling, the hand wheel 1 is rotated to move the valve core 8 up and down in the valve pipe 4, when the valve core 8 moves upward to a position beyond the lower sampling pipe 7, crude oil flows out from below the sampling device, and when the valve core moves downward to a dead point, the sampling device is closed by cooperation of the lower valve seat 9 to stop sampling, thereby playing a sealing role; before sampling, the dead oil can be flushed into the pipeline process by making the crude oil transport in the lower sampling pipe 7, the valve pipe 4 and the upper back transport pipe 5.

[0040] The device improves the internal structure of the sampling valve, is internally provided with a circulating flow space for crude oil, and makes the crude oil flow in the circulating space before sampling to flush the dead oil into the pipeline process, thereby ensuring that workers do not need to drain the dead oil in advance during sampling, reducing the preparation work before sampling and the loading, transportation and subsequent treatment of the dead oil. In this way, the problem that workers need to drain the dead oil first during sampling is solved, and the workload of subsequent treatment of the dead oil is reduced. Ultimately, the purpose of reducing the labor intensity of workers, reducing the work cost and improving the economic benefit is achieved.

[0041] The device is applied to the oil extraction site pumping wellhead process of thin oil extraction, replaces the original sampling gate, and is used for oil well sampling. At present, it has been applied in 15 well sites, improves the sampling accuracy, avoids the collection, transportation and subsequent treatment of the dead oil during the sampling process, and has good use effect.

[0042] Example 2:

[0043] In the embodiment 1, the sampling pipeline is provided. Figure 2 The embodiment provides a sampling pipeline, which comprises an oil pipeline 20, wherein a back pressure valve 21 is arranged on the oil pipeline 20, a lower branch pipe 22 is arranged at the lower end of the back pressure valve 21, an upper branch pipe 23 is arranged at the upper end of the back pressure valve 21, the lower branch pipe 22 is connected with a lower sampling pipe 7 through a lower control valve 25, and the upper branch pipe 23 is connected with an upper return pipe 5 through an upper control valve 24.

[0044] Specifically, the upper control valve 24 and the lower control valve 25 are ball valves.

[0045] Embodiment 3

[0046] In the embodiment 2, the embodiment provides a use method of the sampling pipeline, which comprises the following steps.

[0047] S1, before installing the bidirectional valve body type sampling device, the oil well is stopped and emptied, holes are opened at appropriate positions on both sides of the back pressure valve 21 of the oil pipeline 20, the lower branch pipe 22 and the upper branch pipe 23 are welded, the lower control valve 25 is connected with the lower branch pipe 22, the upper control valve 24 is connected with the upper branch pipe 23, the upper return pipe 5 is connected with the upper control valve 24, and the lower sampling pipe 7 is connected with the lower control valve 25.

[0048] S2, during normal production, the hand wheel 1 is in a closed state, the valve core 8 is in close contact with the lower valve seat 9, the upper control valve 24 and the lower control valve 25 are closed, and the crude oil flows in the oil pipeline 20, so that the crude oil is prevented from leaking out;

[0049] S3, during sampling, the upper control valve 24 and the lower control valve 25 are first opened, and the back pressure valve 20 is closed, so that the crude oil is circulated and washed in the valve pipe 4 for 1 minute.

[0050] The hand wheel 1 is rotated to move the valve core 8 upward to be away from the lower valve seat 9, the crude oil falls into the sampling barrel through the lower valve seat 9, and the length of the exposed screw rod 2 is used to determine the position of the valve core 8, and when the valve core 8 is in contact with the upper valve seat 6, the maximum sampling flow is reached.

[0051] S4, after the sampling is completed, the valve core 8 is in contact with the lower valve seat 9 by using the hand wheel 1, the sampling device is closed, the back pressure valve 20 is opened, the upper control valve 24 and the lower control valve 25 are closed, and the hand wheel 1 is slightly opened to confirm that the residual oil in the sampling device has been emptied, so that the circulation time of the third step of the next sampling work can be effectively reduced, and the operation is completed.

[0052] In the application, the parts themselves that are not discussed, and the connection modes of the parts in the application all belong to the known technology in the technical field, which can be directly applied and will not be described herein.

[0053] In the present application, the term "a plurality of" refers to two or more, unless otherwise expressly specified. The terms "mounting", "connected", "connecting", "fixed", and the like should be understood broadly, for example, "connected" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0055] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A two-way valve body type sampling device comprising a valve pipe, characterized in that, The valve pipe side wall is provided with an upper return pipe and a lower sampling pipe, and the upper end of the valve pipe is a closed plate, and the lower end of the valve pipe is open; The inner wall of the valve pipe is fixedly connected with an upper valve seat and a lower valve seat, the upper valve seat is located between the upper return pipe and the lower sampling pipe, and the lower valve seat is located below the lower sampling pipe; The closed plate is linearly connected with a valve rod, the lower end of the valve rod is provided with a valve core, the valve core is located between the upper valve seat and the lower valve seat, and the valve core can be sealed with the upper valve seat or the lower valve seat.

2. A valve body type sampling device according to claim 1, characterized in that The valve rod is a lead screw, and the center of the closed plate is provided with a through hole; The lower end surface of the closed plate is provided with a screw sleeve, the hole diameter of the screw sleeve is the same as that of the through hole, and the lead screw is threadedly connected with the screw sleeve.

3. A valve body type sampling device according to claim 2, wherein The upper end surface of the closed plate is provided with a packing sleeve, the hole diameter of the packing sleeve is larger than that of the through hole, and the packing sleeve is filled with a sealing packing between the lead screw; The upper end of the sealing packing is provided with a packing pressing ring, the upper end of the packing sleeve is connected with a pressing cap, the pressing cap presses down the packing pressing ring, and the packing pressing ring tightly presses the sealing packing.

4. The dual valve body sampling device of claim 2, wherein, The upper end of the lead screw is provided with a tool handle for connecting a rotating tool.

5. A valve body type sampling device according to claim 4, wherein The rotating tool is a hand wheel.

6. A valve body type sampling device according to claim 1, wherein The lower end surface of the upper valve seat is provided with a first conical seat, and the upper end surface of the lower valve seat is provided with a second conical seat; The upper end of the valve core is provided with a first conical head, and the lower end of the valve core is provided with a second conical head; The diameter of the center hole of the first conical seat is larger than that of the small diameter end of the first conical head, and the diameter of the center hole of the second conical seat is larger than that of the small diameter end of the second conical head.

7. A sampling line comprising a flow line, said flow line being provided with a main control valve, characterized in that Also comprising a bidirectional valve body type sampling device according to claim 1; The oil pipeline is provided with a lower branch pipe below the back pressure valve and an upper branch pipe above the back pressure valve, the lower branch pipe is connected with the lower sampling pipe through a lower control valve, and the upper branch pipe is connected with the upper return pipe through an upper control valve.

8. A sampling line according to claim 7, wherein, The main control valve is a back pressure valve, and the upper control valve and the lower control valve are ball valves.

Images