Unidirectional flow tracer production monitoring device

Abstract

The utility model discloses a one -way flow tracer output monitoring device, including the central pipe, central pipe both ends are connected respectively upper joint, lower joint, and the outer wall of central pipe is successively provided with check valve, mixed liquid cabin, outer tube, inlet liquid cabin along upper joint to lower joint direction, and the liquid outlet is established between check valve and upper joint on the central pipe, and the radial direction is successively distributed with a plurality of clamping slots in the outer tube, and the both ends of clamping slot are equipped with baffle and movable baffle respectively, and the cavity between both constitutes tracer filling chamber, and the device of the utility model has solved the problem that the pressure of each perforating section exists difference after the water of horizontal well is seen, and the interlayer interference is serious, causes the problem of tracer test result distortion.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil production equipment in the petroleum industry, specifically relating to a device for monitoring the production of unidirectional flow tracers. Background Technology

[0002] Over 80% of China National Petroleum Corporation's proven reserves are low-permeability reservoirs. Horizontal wells offer significant advantages, including high single-well controlled reserves, large drainage area, and high production, making them the primary technology for the effective development of low-quality reservoirs and a crucial means of development. Initially, single-well production reached 3-4 times that of vertical wells. However, with the continuous development of the reservoir, influenced by factors such as natural and artificial fractures, injected water, and formation water, the water cut of horizontal wells in some blocks has increased rapidly, resulting in severe daily production losses. Targeted water-blocking measures are urgently needed to control water, increase oil production, and restore production capacity.

[0003] Horizontal well production profile water-finding testing technology is the "eyes" of reservoir geologists, playing a crucial role in well diagnosis and guiding oilfield development. Currently, water-finding testing methods for horizontal wells in low-permeability oilfields mainly include segmented production water-finding technology using a dragged tubing string, while tracer monitoring water-finding technology has been explored and tested. This involves running downhole long-acting slow-release tracer subs, collecting samples at the wellhead to quantitatively analyze water production in different perforation sections by measuring tracer concentration. However, existing tracer testing subs and water-finding tracers have insufficient compatibility: firstly, pressure differences exist in each perforation section after water breakthrough in horizontal wells, leading to severe inter-layer interference and distorted tracer test results; secondly, it's impossible to personalize the tracer dosage based on the well's production volume; and thirdly, the inlet cannot achieve uniform flushing of tracer particles with well fluid and is prone to clogging. Utility Model Content

[0004] The purpose of this invention is to provide a unidirectional flow tracer production monitoring device. It solves the problem of pressure differences and severe inter-layer interference in perforated sections after water breakthrough in horizontal wells, which leads to distorted tracer test results.

[0005] The technical solution adopted by this utility model is as follows: a one-way flow tracer production monitoring device, including a central tube, with an upper connector and a lower connector connected to both ends of the central tube respectively. A one-way valve, a mixing chamber, an outer tube, and an inlet chamber are sequentially sleeved on the outer wall of the central tube along the direction from the upper connector to the lower connector. An outlet is provided on the central tube between the one-way valve and the upper connector. Several slots are sequentially distributed radially inside the outer tube. A baffle and a movable partition are provided at both ends of the slots respectively. The cavity between the two constitutes the tracer filling cavity.

[0006] The technical solution adopted in this utility model is also characterized by:

[0007] Furthermore, the upper and lower connectors are threaded to both ends of the central tube, respectively.

[0008] Furthermore, the one-way valve is a one-flow needle valve structure with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe cannot flow back into the mixing chamber through the outlet.

[0009] Furthermore, the outlet of the mixing chamber has several liquid passages evenly distributed radially.

[0010] Furthermore, the one-way valve, mixing chamber, outer tube, and inlet chamber are sequentially fitted onto the outer wall of the central tube and fixed with screws for easy replacement.

[0011] Furthermore, the movable partition can be adjusted in position to adjust the volume of the tracer filling chamber.

[0012] Furthermore, the baffle is located at the inlet of the mixing tank.

[0013] Furthermore, both the baffle and the movable partition have several evenly distributed through holes.

[0014] Furthermore, the inlet of the liquid inlet chamber adopts a slit design to ensure that impurities inside the wellbore cannot enter.

[0015] Furthermore, there are 6 card slots.

[0016] Furthermore, there are 6 liquid passages.

[0017] The beneficial effects of this utility model are:

[0018] This invention ensures the reliability of tracer test results by setting a one-way valve at the outlet to prevent fluid from entering other test sections between perforation sections; the volume of the tracer filling chamber can be adjusted according to the production rate of the test well to meet the testing regime of different wells; the reasonable arrangement of the inlet channel and the addition of the slotted structure ensure that the well fluid uniformly washes the tracer particles, solving the problem of impurities in the well fluid clogging the channel.

[0019] This utility model device features a unidirectional flow structure for the tracer test section, allowing fluid from the corresponding layer to flow through only that section without interference from other layers, resulting in highly reliable test results. Furthermore, the tracer filling chamber volume can be customized according to the well's production rate to meet the testing requirements of different wells. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall device of this utility model;

[0021] Figure 2 This is a cross-sectional view of the device of this utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the liquid outlet, baffle, and liquid inlet chamber of this utility model.

[0023] In the diagram, 1 is the upper connector, 2 is the outlet, 3 is the one-way valve, 4 is the mixing chamber, 5 is the baffle, 6 is the central tube, 7 is the tracer filling chamber, 8 is the outer tube, 9 is the movable partition, 10 is the inlet chamber, and 11 is the lower connector. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] The subject matter of this utility model disclosure will now be described more fully with reference to exemplary embodiments. However, the disclosed concepts may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. (By referring to the accompanying drawings...) Figure 1 The features of the embodiments disclosed herein and how to implement the features of the embodiments disclosed herein will become apparent from the embodiments described in more detail herein.

[0026] Unless the context explicitly specifies otherwise, references to elements (e.g., “the”) may include plural forms. For purposes of meaning and interpretation, the term “and / or” is intended to include any combination of the terms “and” and “or”. For example, “A and / or B” can be understood to mean “A, B, or A and B”. The terms “and” and “or” can be used in a connected or separate sense and can be understood as equivalent to “and / or”. For purposes of meaning and interpretation, the phrase “at least one of…” is intended to include the meaning of “at least one of the groups…”. For example, “at least one of A and B” can be understood to mean “A, B, or A and B”.

[0027] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the publicly disclosed teachings, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element. For ease of description, spatially relative terms such as “below,” “under,” “down,” “above,” and “above” may be used herein to describe the relationship of one element or feature as shown in the accompanying drawings to another element(s). It will be understood that, in addition to the orientations depicted in the accompanying drawings, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, then an element described as “below” or “under” other elements or features will be subsequently oriented as “above” or “above” other elements or features. Thus, the term “below” can encompass both above and below orientations. The device may be oriented in other ways, and the spatially relative descriptive terms used herein should be interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing embodiments of the present invention and is not intended to limit the disclosure. As used herein, the singular form “a” is intended to include the plural form as well, unless the context explicitly indicates otherwise. It will be further understood that, when used in this specification, the terms “comprising,” “including,” “containing,” and / or “having” indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Each of the features of the various disclosed embodiments can be combined in whole or in part, and various technically interconnected and driving relationships are possible. Each embodiment can be implemented independently of each other or can be implemented together in association. For ease of explanation, the dimensions of the components in the drawings may be exaggerated. In other words, since the dimensions and thicknesses of the components in the drawings can be arbitrarily shown for ease of explanation, the following embodiments disclosed herein are not limited thereto.

[0029] Unless otherwise specified, all terms used in this invention (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms defined in commonly used dictionaries shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and unless expressly defined herein, these terms shall not be interpreted in an idealized or overly formal sense.

[0030] This invention addresses the problems existing in the prior art by combining years of design and usage experience in the relevant manufacturing field with strong professional knowledge and in accordance with the requirements of horizontal well production profile testing technology, providing a unidirectional flow tracer production monitoring device to overcome the above-mentioned defects.

[0031] The device of this invention ensures the reliability of tracer test results by setting a one-way valve at the outlet to prevent fluid between perforation sections from entering other test sections; the volume of the tracer filling chamber can be adjusted according to the production of the test well to meet the testing regime of different wells; the reasonable arrangement of the inlet channel and the addition of the slotted structure ensure that the well fluid uniformly washes the tracer particles, solving the problem of impurities in the well fluid clogging the channel.

[0032] This utility model provides a one-way flow tracer production monitoring device, including an upper connector 1, a liquid outlet 2, a one-way valve 3, a mixing chamber 4, a baffle 5, a central tube 6, a tracer filling chamber 7, an outer tube 8, a movable partition 9, a liquid inlet chamber 10, and a lower connector 11.

[0033] like Figure 1 and Figure 2 As shown, the central tube 6 is connected to an upper connector 1 and a lower connector 11 at both ends. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted onto the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Several slots are radially distributed inside the outer tube 8, with baffles 5 and movable partitions 9 at both ends of each slot. Figure 3 As shown, the cavity between the two constitutes the tracer filling cavity 7.

[0034] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0035] One-way valve 3 is a one-flow needle valve structure, with an opening value of not less than 25N, to ensure that the well fluid entering the central tube 6 cannot flow back to the mixing chamber 4 through the outlet 2;

[0036] The mixing chamber 4 has six radially evenly distributed liquid passages at its outlet;

[0037] The mixing chamber 4, one-way valve 3, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy quick replacement.

[0038] The outer tube 8 has 6 slots arranged radially in sequence. At both ends of the slots are baffles 5 and movable partitions 9, which are used to install the tracer filling chamber 7.

[0039] Mixing chamber 4 is used for temporary storage of well fluid used to flush tracers;

[0040] The tracer filling chamber 7 is used to place the tracer;

[0041] The movable partition 9 is used to adjust the volume of the tracer filling chamber 7;

[0042] Baffle 5 is located at the inlet of mixing tank 4;

[0043] The liquid inlet of the liquid inlet chamber 10 adopts a slit design to ensure that impurities inside the wellbore cannot enter;

[0044] Working principle of this utility model device:

[0045] During operation, the volume of the tracer filling chamber 7 is adjusted according to the production of the test well via the movable baffle 9, and then 6 filled tracer fillers are installed. The upper connector 1 and lower connector 11 of the one-way flow structure tracer test section are connected to the surface by tubing. The one-way flow structure tracer test section is lowered to the target layer with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluids of other layers and discharge them to the surface.

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0047] Example 1

[0048] This embodiment provides a unidirectional flow tracer production monitoring device, such as... Figure 1 As shown, a unidirectional flow tracer production monitoring device includes an upper connector 1, a liquid outlet 2, a one-way valve 3, a mixing chamber 4, a baffle 5, a central tube 6, a tracer filling chamber 7, an outer tube 8, a movable partition 9, a liquid inlet chamber 10, and a lower connector 11.

[0049] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively. The one-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central tube 6 cannot flow back to the mixing chamber 4 through the outlet 2. The outlet of the mixing chamber 4 has six flow channels evenly distributed radially. The mixing chamber 4, the one-way valve 3, the outer tube 8, and the inlet chamber 10 are all sequentially fitted onto the outer wall of the central tube 6 and fixed with screws for easy replacement. The outer tube 8 has six slots radially distributed, with baffles 5 and movable partitions 9 at both ends of the slots for installing the tracer filling chamber 7. The mixing chamber 4 is used to temporarily store the well fluid used to flush the tracer. The tracer filling chamber 7 is used to place the tracer. The movable partition 9 is used to adjust the volume of the tracer filling chamber 7. The baffle 5 is located at the inlet of the mixing chamber 4. The inlet of the inlet chamber 10 adopts a slit design to ensure that impurities in the wellbore cannot enter.

[0050] During operation, the volume of the tracer filling chamber 7 is adjusted according to the production of the test well via the movable baffle 9, and then 6 filled tracer fillers are installed. The upper connector 1 and lower connector 11 of the one-way flow structure tracer test section are connected to the surface by tubing. The one-way flow structure tracer test section is lowered to the target layer with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, and then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid of other layers, and is discharged to the surface together.

[0051] Example 2

[0052] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. The upper connector 1 and the lower connector 11 of the one-way flow tracer test section are connected to the ground by an oil pipe. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7. The volume of the tracer filling chamber 7 is adjusted by the movable partition 9, and then six filled tracer fillers are loaded into it.

[0053] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0054] Example 3

[0055] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. The upper connector 1 and the lower connector 11 of the one-way flow tracer test section are connected to the ground by an oil pipe. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7. The volume of the tracer filling chamber 7 is adjusted by the movable partition 9, and then six filled tracer fillers are loaded into it.

[0056] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0057] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0058] Example 4

[0059] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0060] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0061] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0062] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0063] Example 5

[0064] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0065] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0066] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0067] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0068] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0069] Example 6

[0070] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0071] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0072] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0073] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0074] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0075] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0076] Example 7

[0077] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0078] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0079] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0080] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0081] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0082] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0083] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0084] Example 8

[0085] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0086] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0087] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0088] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0089] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0090] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0091] Baffle 5 is located at the inlet of mixing tank 4.

[0092] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0093] Example 9

[0094] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0095] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0096] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0097] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0098] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0099] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0100] Baffle 5 is located at the inlet of mixing tank 4.

[0101] Both the baffle 5 and the movable partition 9 have several evenly distributed through holes.

[0102] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0103] Example 10

[0104] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Six slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0105] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0106] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0107] There are 6 liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0108] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0109] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0110] Baffle 5 is located at the inlet of mixing tank 4.

[0111] Both the baffle 5 and the movable partition 9 have several evenly distributed through holes.

[0112] The liquid inlet of the liquid inlet chamber 10 adopts a slit design to ensure that impurities inside the wellbore cannot enter.

[0113] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0114] Example 11

[0115] This embodiment provides a unidirectional flow tracer production monitoring device, such as... Figure 1 As shown, a unidirectional flow tracer production monitoring device includes an upper connector 1, a liquid outlet 2, a one-way valve 3, a mixing chamber 4, a baffle 5, a central tube 6, a tracer filling chamber 7, an outer tube 8, a movable partition 9, a liquid inlet chamber 10, and a lower connector 11.

[0116] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively. The one-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central tube 6 cannot flow back to the mixing chamber 4 through the outlet 2. The outlet of the mixing chamber 4 has three flow channels evenly distributed radially. The mixing chamber 4, the one-way valve 3, the outer tube 8, and the inlet chamber 10 are all sequentially fitted onto the outer wall of the central tube 6 and fixed with screws for easy replacement. The outer tube 8 has three slots radially distributed, with baffles 5 and movable partitions 9 at both ends of the slots for installing the tracer filling chamber 7. The mixing chamber 4 is used to temporarily store the well fluid used to flush the tracer. The tracer filling chamber 7 is used to place the tracer. The movable partition 9 is used to adjust the volume of the tracer filling chamber 7. The baffle 5 is located at the inlet of the mixing chamber 4. The inlet of the inlet chamber 10 adopts a slit design to ensure that impurities in the wellbore cannot enter.

[0117] During operation, the volume of the tracer filling chamber 7 is adjusted according to the production of the test well via the movable baffle 9, and then 6 filled tracer fillers are installed. The upper connector 1 and lower connector 11 of the one-way flow structure tracer test section are connected to the surface by tubing. The one-way flow structure tracer test section is lowered to the target layer with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, and then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid of other layers, and is discharged to the surface together.

[0118] Example 12

[0119] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. The upper connector 1 and the lower connector 11 of the one-way flow tracer test section are connected to the ground by an oil pipe. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7. The volume of the tracer filling chamber 7 is adjusted by the movable partition 9, and then six filled tracer fillers are loaded into it.

[0120] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0121] Example 13

[0122] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0123] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0124] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0125] Example 14

[0126] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0127] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0128] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0129] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0130] Example 15

[0131] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0132] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0133] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0134] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0135] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0136] Example 16

[0137] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0138] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0139] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0140] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0141] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0142] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0143] Example 17

[0144] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0145] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0146] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0147] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0148] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0149] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0150] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0151] Example 18

[0152] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0153] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0154] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0155] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0156] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0157] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0158] Baffle 5 is located at the inlet of mixing tank 4.

[0159] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0160] Example 19

[0161] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0162] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0163] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0164] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0165] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0166] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0167] Baffle 5 is located at the inlet of mixing tank 4.

[0168] Both the baffle 5 and the movable partition 9 have several evenly distributed through holes.

[0169] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0170] Example 20

[0171] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Three slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7.

[0172] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0173] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0174] There are three liquid passages radially evenly distributed at the outlet of the mixing chamber 4.

[0175] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0176] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0177] Baffle 5 is located at the inlet of mixing tank 4.

[0178] Both the baffle 5 and the movable partition 9 have several evenly distributed through holes.

[0179] The liquid inlet of the liquid inlet chamber 10 adopts a slit design to ensure that impurities inside the wellbore cannot enter.

[0180] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0181] Example 21

[0182] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. The upper connector 1 and the lower connector 11 of the one-way flow tracer test section are connected to the ground by an oil pipe. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two constitutes a tracer filling chamber 7. The volume of the tracer filling chamber 7 is adjusted by the movable partition 9, and then six filled tracer fillers are loaded into it.

[0183] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0184] Example 22

[0185] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0186] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0187] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0188] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0189] Example 23

[0190] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0191] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0192] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0193] The mixing chamber has four radially evenly distributed liquid passages at its four outlets.

[0194] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0195] Example 24

[0196] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0197] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0198] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0199] The mixing chamber has four radially evenly distributed liquid passages at its four outlets.

[0200] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0201] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0202] Example 25

[0203] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0204] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0205] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0206] The mixing chamber has four radially evenly distributed liquid passages at its four outlets.

[0207] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0208] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0209] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0210] Example 26

[0211] A one-way flow tracer production monitoring device includes a central tube 6, with an upper connector 1 and a lower connector 11 connected to both ends of the central tube 6. A one-way valve 3, a mixing chamber 4, an outer tube 8, and an inlet chamber 10 are sequentially fitted on the outer wall of the central tube 6 along the direction from the upper connector 1 to the lower connector 11. An outlet 2 is provided on the central tube 6 between the one-way valve 3 and the upper connector 1. Four slots are arranged radially inside the outer tube 8. A baffle 5 and a movable partition 9 are provided at both ends of the slots, and the cavity between the two forms a tracer filling chamber 7.

[0212] The upper connector 1 and the lower connector 11 are threaded to both ends of the central tube 6, respectively.

[0213] One-way valve 3 is a one-flow needle valve with an opening value of not less than 25N, ensuring that the well fluid entering the central pipe 6 cannot flow back into the mixing chamber 4 through the outlet 2.

[0214] The mixing chamber has four radially evenly distributed liquid passages at its four outlets.

[0215] One-way valve 3, mixing chamber 4, outer pipe 8, and inlet chamber 10 are all sequentially fitted onto the outer wall of the central pipe 6 and fixed with screws for easy replacement.

[0216] The movable partition 9 can be adjusted in position to adjust the volume of the tracer filling chamber 7.

[0217] Baffle 5 is located at the inlet of mixing tank 4.

[0218] Both the baffle 5 and the movable partition 9 have several evenly distributed through holes.

[0219] The liquid inlet of the liquid inlet chamber 10 adopts a slit design to ensure that impurities inside the wellbore cannot enter.

[0220] The unidirectional flow tracer test section is lowered to the target layer along with the tubing. The layers are separated by packers to ensure that there is a tracer test section for each corresponding layer. When the well is pumped, the well fluid enters the chamber from the inlet chamber 10, then enters the tracer filling chamber 7 through the movable baffle 9, continuously flushing the tracer filler. It then enters the mixing chamber 4 through the baffle 5, and then enters the central pipe 6 through the outlet 2 via the one-way valve 3 to mix with the well fluid from other layers before being discharged to the surface.

[0221] The device of this utility model has the following innovative design features:

[0222] 1. Modular design:

[0223] Each functional component is fixed to the central tube with screws, allowing for quick disassembly and replacement.

[0224] The outer tube slot structure enables the parallel arrangement of six tracer chambers.

[0225] 2. Adjustable volume design:

[0226] The movable partition 9 allows for flexible adjustment of the tracer filling chamber volume.

[0227] To meet testing needs with different liquid production rates

[0228] 3. Anti-backflow design:

[0229] The one-way valve ensures unidirectional flow of well fluid (inlet chamber → center pipe).

[0230] The slit-type liquid inlet prevents impurities from flowing back in.

[0231] The working principle of the device of this utility model is as follows:

[0232] Workflow:

[0233] Well fluid → Inlet chamber → Tracer chamber (flush tracer) → Mixing chamber → Check valve → Central pipe → Surface.

[0234] Layered monitoring implementation:

[0235] Multiple short sections are connected in series via oil pipes;

[0236] Packers isolate different layers;

[0237] Each layer has a corresponding independent tracer label.

[0238] The device of this utility model has the following technical advantages:

[0239] reliability:

[0240] One-way valve + slit design for double contamination prevention

[0241] Screw fixing enhances structural stability

[0242] Adaptability:

[0243] The tracer chamber volume is adjustable.

[0244] The 6-channel uniform distribution design ensures balanced flow.

[0245] Ease of maintenance:

[0246] Modular structure facilitates tracer replacement

[0247] Standard oil pipe threaded connection (upper / lower connector)

[0248] The device of this utility model has a wide range of applications:

[0249] It is suitable for monitoring the production profile of multi-layered oil wells, and is especially suitable for development wells that require long-term tracking of production at specific layers. By configuring different characteristic tracers for different layers, precise differentiation of inter-layer production can be achieved.

[0250] This device solves the problems of poor adaptability and easy cross-contamination of traditional tracer monitoring devices through its innovative slot-type multi-cavity design and adjustable volume structure. Its modular design significantly improves on-site operation efficiency.

[0251] The core technology of this device is based on tracer release kinetics and unidirectional fluid control. Through specific mechanical structure design, it ensures the stable release of the tracer during oil well production and accurately monitors the production status of the target layer. The following is a detailed analysis from three aspects: fluid mechanics, tracer release mechanism, and system control.

[0252] Fluid dynamics design principles

[0253] (1) Unidirectional flow control mechanism

[0254] One-way needle valve type check valve 3:

[0255] The valve core structure is spring-loaded and the opening pressure is set to ≥25N to ensure that the well fluid can only enter the central pipe 6 from the mixing chamber 4 and cannot flow in the opposite direction.

[0256] This design prevents tracer contamination caused by well fluid backflow while avoiding interlayer fluid interference.

[0257] Slit-type liquid inlet chamber 10:

[0258] The design employs a sand-proof slotting technique (slot width typically ≤0.5mm) to filter solid particles in the well fluid and prevent impurities from clogging the tracer filling chamber 7 or the mixing channel.

[0259] (2) Fluid distribution optimization

[0260] Mixing tank 4 six-channel outlet:

[0261] Six radially symmetrical fluid channels are used to ensure that the well fluid uniformly washes the tracer and avoids uneven tracer release caused by excessively rapid local washing.

[0262] Movable baffle 9 adjusts the flow rate:

[0263] By adjusting the position of the baffle, the volume of the tracer filling chamber 7 is changed, thereby controlling the contact area between the well fluid and the tracer and optimizing the release rate.

[0264] 2. Tracer release kinetics principle

[0265] (1) Controlled release mechanism

[0266] Well fluid flushing and dissolution:

[0267] After the well fluid enters from the inlet chamber 10, it flows through the tracer filling chamber 7 and dissolves the tracer through a combination of diffusion and convection.

[0268] The release rate is affected by the flow rate, tracer surface area, and solubility. Adjusting the movable partition 9 can optimize the release kinetics.

[0269] Multi-chamber independent design:

[0270] The six independent tracer filling chambers 7 can be filled with different chemical characteristics (such as radioactive tracers or fluorescent markers with different half-lives) to achieve multi-level synchronous monitoring.

[0271] (2) Tracer mixing and transport

[0272] Mixing chamber 4: Turbulence-enhanced mixing

[0273] After the well fluid carrying the tracer enters the mixing chamber, the tracer and well fluid are fully mixed due to the multi-channel eddy effect, avoiding excessively high or low local concentrations.

[0274] One-way valve 3 stabilizes output:

[0275] Ensure that the mixed fluid enters the central pipe 6 stably and is discharged to the ground through the oil pipe for analysis by detection equipment (such as spectrometers and radioactive detectors).

[0276] 3. System Control and Optimization Principles

[0277] (1) Modular quick change

[0278] Screw fixing + central tube 6 load-bearing structure:

[0279] The mixing chamber 4, outer tube 8, and inlet chamber 10 are all fixed to the central tube with screws, which facilitates quick disassembly and replacement of the tracer and reduces operation time.

[0280] Standardized tubing connections (upper / lower fittings):

[0281] It adopts API standard tubing threads (such as 2 7 / 8″ TBG) and can be directly connected to existing production tubing, with strong compatibility.

[0282] (2) Interlayer interference suppression

[0283] Packer + multi-short section combination:

[0284] Each target layer is equipped with a monitoring section and isolated by a packer to ensure that the fluid flows independently in each layer and to avoid interlayer crossflow affecting the monitoring accuracy.

[0285] Unidirectional flow + anti-backflow design:

[0286] There is no backflow path from liquid inlet to liquid outlet, ensuring that the tracer data only reflects the output of the corresponding layer.

[0287] 4. Technical Comparison and Summary of Advantages

[0288] Compared with traditional tracer monitoring technology, the technical solution of this utility model has the advantages shown in Table 1.

[0289] Table 1

[0290]

[0291] Core advantages:

[0292] Precise stratigraphic monitoring: Through the isolation of different characteristic tracers and packers, multi-level synchronous independent monitoring is achieved.

[0293] Long-term stability: Unidirectional flow + sand prevention design avoids clogging and contamination, making it suitable for long-term monitoring.

[0294] Highly adaptable to field conditions: The adjustable tracer chamber volume can meet the needs of oil wells with different production volumes.

[0295] This invention achieves high-precision and high-reliability stratified production monitoring through fluid control optimization and tracer release kinetic regulation, providing key data support for oilfield dynamic analysis.

[0296] It can be applied to the following scenarios

[0297] Multi-layer commingled wells: Monitor the contribution rate of each layer and optimize production allocation schemes.

[0298] Water channeling identification: High water-bearing layers are determined by the breakthrough time of the tracer.

[0299] Fracturing effect evaluation: Compare the production profiles before and after fracturing to evaluate the effect of the fracturing.

[0300] The features of the various embodiments disclosed in this utility model can be combined in part or in whole. As will be clearly understood by those skilled in the art, various technical interactions and operations are possible. Furthermore, various embodiments can be implemented individually or in combination.

[0301] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the described embodiments without departing from this disclosure. Therefore, the disclosed embodiments are used in a general and descriptive sense and are not intended to be limiting.

[0302] The above are merely preferred embodiments of this utility model and do not limit the scope of patent protection of this utility model. Besides the above embodiments, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model. Technical features of this utility model not described can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A unidirectional flow tracer production monitoring device, characterized in that, The central tube (6) is connected to an upper connector (1) and a lower connector (11) at both ends. A one-way valve (3), a mixing chamber (4), an outer tube (8), and an inlet chamber (10) are sequentially mounted on the outer wall of the central tube (6) from the upper connector (1) to the lower connector (11). An outlet (2) is provided on the central tube (6) between the one-way valve (3) and the upper connector (1). Several slots are distributed radially inside the outer tube (8). A baffle (5) and a movable partition (9) are provided at both ends of the slots. The cavity between the two forms a tracer filling cavity (7).

2. The unidirectional flow tracer production monitoring device according to claim 1, characterized in that, The upper connector (1) and the lower connector (11) are threaded to both ends of the central tube (6).

3. The unidirectional flow tracer production monitoring device according to claim 2, characterized in that, The one-way valve (3) is a one-flow needle valve structure, with an opening value of not less than 25N, to ensure that the well fluid entering the central pipe (6) cannot flow back to the mixing chamber (4) through the outlet (2).

4. The unidirectional flow tracer production monitoring device according to claim 3, characterized in that, The mixing chamber (4) has several liquid passages evenly distributed radially at its outlet.

5. The unidirectional flow tracer production monitoring device according to claim 4, characterized in that, The one-way valve (3), mixing chamber (4), outer tube (8), and inlet chamber (10) are all sequentially fitted onto the outer wall of the central tube (6) and fixed with screws for easy replacement.

6. The unidirectional flow tracer production monitoring device according to claim 5, characterized in that, The movable partition (9) can be adjusted in position to adjust the volume of the tracer filling cavity (7).

7. The unidirectional flow tracer production monitoring device according to claim 6, characterized in that, The baffle (5) is located at the inlet of the mixing chamber (4).

8. The unidirectional flow tracer production monitoring device according to claim 7, characterized in that, Both the baffle (5) and the movable partition (9) have several evenly distributed through holes.

9. The unidirectional flow tracer production monitoring device according to claim 8, characterized in that, The inlet of the liquid inlet chamber (10) adopts a slit design to ensure that impurities inside the wellbore cannot enter.

10. The unidirectional flow tracer production monitoring device according to claim 1, characterized in that, The number of card slots is 6.

11. The unidirectional flow tracer production monitoring device according to claim 4, characterized in that, The number of liquid passages is 6.

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