Carbon dioxide concentration monitoring equipment

Abstract

The utility model discloses carbon dioxide concentration monitoring equipment, and particularly relates to the field of carbon dioxide monitoring. The supporting mechanism comprises a base, a sliding rod and a hoop, the base is fixed in a carriage of the trailer, the box body is arranged on the base, one end of the sliding rod is slidably connected with the base, the other end of the sliding rod is connected with the hoop, and the hoop is used for locking and supporting a pipeline; wherein the clamping hoop comprises a hoop body, an m pipe and an abutting rod, the hollow m pipe and the abutting rod are connected in a sealed and sliding mode, and the abutting rod moves in the radial direction of the hoop body. According to the design, mixed gas produced by an oil and gas wellhead is guided into the monitoring module, a tomography imager and a carbon dioxide measuring instrument are used for conducting component analysis on the gas, the gas monitoring precision is improved, and the detection accuracy is improved. And meanwhile, on the basis of an m-pipe structure, an abutting rod is pushed by air pressure to move so as to clamp pipelines of different sizes, the application range of the whole design is widened, the pulling degree of the pipelines to the box body is reduced, and the probability that the box body topples over is reduced.

Description

Technical Field

[0001] The utility model relates to the field of wellhead carbon dioxide monitoring for oil and gas well development, and more specifically, to a carbon dioxide concentration monitoring device. Background Art

[0002] Carbon dioxide monitoring used in oil and gas well exploitation mainly involves the use of dedicated sensors and monitoring equipment to continuously monitor the carbon dioxide concentration in the underground working environment of oil and gas wells to ensure the safety of workers and prevent accidents such as gas explosions. Most existing monitoring equipment is immobile and needs to be equipped with mobile devices to improve its mobility. For example, a vehicle-mounted method can be used to transport the monitoring equipment from one location to another.

[0003] The above-mentioned transportation method has the following problems when in use: there is a certain height between the pipeline interface of the monitoring equipment located on the trailer and the ground, which causes the center of gravity of the monitoring equipment to be higher. The connection between the pipeline with a certain weight and the monitoring equipment will pull the monitoring equipment from the side, causing the equipment to be in danger of overturning during the connection process with the pipeline. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a carbon dioxide concentration monitoring device. The technical problem to be solved by the utility model is: how to improve the stability of the carbon dioxide monitoring device after being connected to the pipeline.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbon dioxide concentration monitoring device, including a box body, in which a monitoring module is placed; a supporting mechanism, including a base, a sliding rod and a clamp, the base is fixed in the trailer compartment, the box body is placed on the base, one end of the sliding rod is slidably connected to the base and the other end is connected to the clamp, the clamp is used to lock and support the pipeline; wherein the clamp includes a hoop body, an m tube and a resistance rod, the hollow m tube and the resistance rod are closed and slidably connected, and the resistance rod moves radially along the hoop body.

[0006] In a preferred embodiment, the m tube includes two side arm tubes and an intermediate tube located in the middle of the two side arm tubes, the side arm tubes are connected to the air pressure source, the resistance rod is closed and slidably connected in the intermediate tube, and the resistance rod is set through the hoop body.

[0007] In a preferred embodiment, the sliding rod includes an outer rod, an inner rod and a support leg, the outer rod is slidably placed in the base, the inner rod and the outer rod are rotatably connected, the hoop body is connected to the top end of the inner rod through an adjustment member, and the support leg is connected to the bottom end of the inner rod.

[0008] In a preferred embodiment, the support foot is connected to the bottom end of the inner rod through a ball bearing, and anti-slip spikes are fixed on the end surface of the support foot for contacting the ground.

[0009] In a preferred embodiment, the adjusting member includes a screw and a conduit, a damping rotation connection between the hoop body and the screw, a closed cavity is opened in the inner rod, the screw and the cavity are threadedly connected, and the end of the screw is rotationally connected to the air pressure plate, the air pressure plate and the inner wall of the cavity of the inner rod are closed and slidably connected, and the conduit connects the cavity and the m tube; the screw rotates to press the air pressure in the cavity into the m tube as an air pressure source.

[0010] In a preferred embodiment, the adjusting member includes a screw, a rotating block and a conduit. The screw and the rotating block are connected in a damped rotational manner, the rotating block and the hoop body are connected in a damped rotational manner, the rotation directions of the screw and the rotating block, and the rotating block and the hoop body are perpendicular to each other, a closed cavity is opened in the inner rod, the screw and the inner rod are threadedly connected, and the end of the screw is rotationally connected to the air pressure plate, the air pressure plate and the inner wall of the cavity of the inner rod are closed and slidably connected, and the conduit connects the cavity and the m tube; the screw rotates to press the air pressure in the cavity into the m tube as an air pressure source.

[0011] In a preferred embodiment, a driving mechanism is provided on the base, including a motor and a screw rod, the motor is mounted on the carriage, the output shaft of the motor is fixedly connected to the screw rod, the screw rod is threadedly connected to the box body, and the box body is slidably connected to the base.

[0012] In a preferred embodiment, the monitoring module includes: a tomographic imager, a pipeline is used to connect the wellhead of the oil and gas well and the input port of the tomographic imager, and the output port of the tomographic imager is connected to a storage tank; a carbon dioxide measuring instrument, which is connected to the tomographic imager through a sampling tube, and the output port of the carbon dioxide measuring instrument is connected to the outside world.

[0013] Technical effects and advantages of the utility model:

[0014] 1. This design introduces the mixed gas produced from the wellhead of the oil and gas well into the monitoring module, and uses a tomography imager and a carbon dioxide measuring instrument to analyze the composition of the mixed gas, thereby improving the monitoring accuracy of the mixed gas;

[0015] 2. This design optimizes the convenience and cleanliness of manually pushing and pulling the clamp by designing the structure of the m-tube. At the same time, based on the m-tube structure, air pressure is used to push the resistance rod to move to clamp pipes of different sizes, thereby improving the applicability of the entire design, reducing the degree of pulling of the pipe on the box, and reducing the probability of the box tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the technical solution of the present utility model and constitute a part of the present utility model. The embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation on the present utility model.

[0017] Figure 1 This is a structural diagram of the vehicle-mounted carbon dioxide concentration monitoring device of the present utility model.

[0018] Figure 2 This is a structural diagram of the carbon dioxide concentration monitoring device of the present utility model.

[0019] Figure 3 It is a structural diagram of the slide bar in the utility model.

[0020] Figure 4 It is a structural diagram of the clamp in the utility model.

[0021] Figure 5 This is a structural diagram of the supporting foot in the utility model.

[0022] Figure 6 This is a flow chart of carbon dioxide monitoring and mixed gas detection in the utility model.

[0023] Figure 7 This is a flow chart of the purification, separation and carbon dioxide measurement in the utility model.

[0024] The accompanying drawings are marked as follows: 1. box body; 2. supporting mechanism; 21. base; 22. sliding rod; 221. outer rod; 222. inner rod; 223. support foot; 23. clamp; 231. hoop body; 232. m tube; 233. resistance rod; 24. adjusting member; 241. screw rod; 242. rotating connecting block; 3. driving mechanism; 31. motor; 32. screw rod. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0026] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0027] Example 1

[0028] like Figure 1-Figure 5 , a carbon dioxide concentration monitoring device, mainly uses a tomography imager and a carbon dioxide measuring instrument to realize real-time monitoring of the carbon dioxide content at the wellhead of an oil and gas well.

[0029] The monitoring device mainly includes a box 1, a supporting mechanism 2 and a driving mechanism 3. A monitoring module is placed in the box 1. The monitoring module includes a tomography imager and a carbon dioxide measuring instrument. Both instruments are connected to an external controller and can transmit data to a remote location by wireless transmission.

[0030] like Figure 6 The working process of the monitoring equipment is as follows: the pipeline is used to introduce the output of the oil and gas wellhead, mainly a mixture of various gases, into the tomography imager. The mixed gas is detected by the tomography imager to determine the type of the mixed gas and the real-time dynamics, and the monitored data is uploaded to the external controller (various control terminals with display screens). The sampling tube (which can be a hose or a hard tube) is used to connect the tomography imager and the carbon dioxide measuring instrument, and is used to introduce a small part of the mixed gas sample from the tomography imager into the carbon dioxide measuring instrument. The gas sample is measured by the carbon dioxide measuring instrument and then directed to the outside world. The carbon dioxide measuring instrument uploads the measured carbon dioxide content data to the external controller (various control terminals with display screens), and most of the carbon dioxide gas enters the storage pool through the output port of the tomography imager to complete the recovery and storage of the gas.

[0031] Specifically, regarding the tomography instrument, its working principle and process are briefly introduced as follows:

[0032] Tomography technology can measure multiphase fluids, mainly oil-water, gas-liquid, oil-gas-water; it can be widely used in oilfield single wells, annular wells, metering rooms, water transfer stations, joint stations and other scenarios, especially to meet the requirements of temporary operation scenarios such as fracturing flowback fluid return.

[0033] The measurement process is non-contact, the pipeline sensor is customized with 800-1000mm pipeline of the same specification as the wellhead pipeline, and the installation is simple;

[0034] Obtain oil, water and gas flow in real time with high accuracy (liquid phase absolute error <0.5%, gas phase absolute error <3.0%), small size, light weight, long life and no pollution;

[0035] The tomography technology uses impedance tomography, which slices and images the fluid in the pipeline, cutting the fluid in the pipeline into ultra-thin slices similar to cutting sausages, and distinguishes the content of different components by imaging this slice. The specific principle is that multiple electrodes are set on the outside of the pipe wall, and through different electrode combinations, a thin layer of fluid in the pipeline is divided into hundreds or thousands of units. The difference in the impedance of these unit areas is measured to distinguish whether the area is oil, water or gas, so that thousands of small units of the thin layer are combined into an image. This image realizes quantitative measurement of the water, gas and oil content of the layer. Then, through statistical analysis and calculation of thousands of such images per second, the measurement of the three-phase fluid content in the pipeline is realized.

[0036] like Figure 7 Specifically, the carbon dioxide measuring instrument can be placed in an explosion-proof cabinet. Its working principle and process are briefly described as follows:

[0037] In order to prevent the presence of impurities, dust and moisture in the sample gas, a precision filter (with a built-in 10umPE filter element) is first designed to perform gas-liquid separation and impurity filtering functions; because the sample gas contains water vapor, a vortex condenser is designed to cool and dehumidify, and a liquid collecting tank is configured for collection and discharge; by designing a gas source processor (with a built-in molecular sieve and color-changing silica gel), secondary filtration of the gas is performed to ensure that the sample gas is dry before entering the analysis system; by designing a capsule filter to separate water and gas, clean and dry sample gas is guaranteed to enter the analyzer for analysis and detection.

[0038] The specific operation steps are as follows:

[0039] The sampling flowmeter will send the purified sample gas to the instrument at a constant flow rate of 500mL / min for concentration analysis. The venting flowmeter will speed up the gas replacement and reduce the response time, thus ensuring the long-term stable and reliable operation of the system.

[0040] The three-way switching ball valve is used to switch the collected sample gas and standard gas (zero gas, span gas). If the instrument has a deviation in detection accuracy after being used for a period of time, the switching valve FV can be switched to calibration, and zero gas and span gas can be used for zero calibration and span calibration respectively to correct the deviation;

[0041] Considering the lower ambient temperature in winter, heated sampling tubes and explosion-proof high-temperature heating tapes are designed to ensure that the equipment can operate normally in low temperature environments.

[0042] Wireless data transmission can adopt mobile communication network transmission, LPWAN transmission, Bluetooth transmission, UWB transmission, etc. The above-mentioned data transmission technologies are existing technologies and are mature, so they will not be described in detail.

[0043] The support mechanism 2 includes a base 21, a slide bar 22, and a clamp 23. The base 21 is firmly fixed in the rear compartment of the trailer by welding. The box body 1 is slidably connected to the upper end surface of the base 21. A notch is provided at the bottom of the base 21. The slide bar 22 is placed in the notch in a pull-out manner. It is pulled out when in use and pushed in when not in use. It does not occupy space and volume. The end of the slide bar 22 facing the rear end of the trailer is connected to the clamp 23. When in use, the user uses the clamp 23 as a handle and grasps the edge of the clamp 23 to pull the slide bar 22 out of the base 21. The length of the pull-out is adjusted according to the specific usage. After the pipeline passes through the clamp 23, the clamp 23 is tightened to fix the pipeline, and then the pipeline is connected to the input port of the tomography instrument. By keeping the pipeline between the input port of the tomography instrument and the clamp 23 in a relaxed state, the gravity of the pipeline is mostly borne by the support mechanism 2 to reduce the pulling of the pipeline on the box body 1 and maintain the stability of the entire monitoring device during use.

[0044] Example 2

[0045] like Figure 2-Figure 4 On the basis of Example 1, the clamping method of the clamp 23 is further adjusted.

[0046] The clamp 23 includes a clamp body 231, which is used to clamp the pipe. When the size of the pipe is smaller than the inner diameter of the clamp 23, the pipe can be stably positioned in the clamp 23 in the following manner.

[0047] The first implementation method is to open a through hole on one side of the hoop body 231, and use a bolt to thread the through hole. First, place the pipe into the hoop body 231, and then screw the bolt so that the end of the bolt contacts the side wall of the pipe to tighten the pipe.

[0048] The second embodiment: the clamp 23 also includes an m-tube 232 and a resistance rod 233. The m-tube 232 includes two side arm tubes and an intermediate tube. The intermediate tube is located in the middle of the two side arm tubes. The side arm tubes are connected to the clamp body 231. The resistance rod 233 is closed and slidably connected in the intermediate tube. The resistance rod 233 penetrates the clamp body 231 and can move toward the center of the circle of the clamp body 231. In this way, gas is continuously injected into the m-tube 232 through an external air pump. The air pressure can be used to guide the airflow from the side arm tubes of the m-tube 232 into the intermediate tube, and push the resistance rod 233 out of the intermediate tube. In the process of moving out, the resistance rod 233 clamps the pipeline.

[0049] In particular, the shape of the m-tube 232 is conducive to the user's use of leverage and to clamping the pipe. Specifically, the pipe will be dragged on the ground during transportation, and when the pipe and the hoop body 231 are connected, the hoop body 231 will also be stained with a lot of dust. If the user directly grasps the hoop body 231, the dust will also be stained on the user's hands. The design of the m-tube 232 can achieve the purpose of clamping the pipe on the basis of the airflow conduction provided by its own structure, and the user uses the middle seam of the middle finger and the ring finger as the dividing line to respectively hold the left and right halves of the m-tube 232 to improve the stability when grasping the m-tube 232 and driving the hoop body 231 to move.

[0050] The third embodiment is an improvement on the second embodiment, wherein the sliding rod 22 comprises an outer rod 221 and an inner rod 222 which are rotatably connected to each other, and the outer rod 221 is slidably connected to the base 21;

[0051] The adjusting member 24 includes a screw 241 and a conduit. The hoop body 231 and the screw 241 are rotatably connected. The screw 241 is threadedly connected to the hollow inner rod 222. One end of the screw 241 located inside the inner rod 222 is rotatably connected to the air pressure plate. The air pressure plate and the inner wall of the inner rod 222 are airtightly slidably connected. One end of the conduit is connected to the m-tube 232, and the other end is located below the air pressure plate and connected to the inner rod 222. In this way, by rotating the screw 241, the air pressure plate can squeeze the gas and transport the gas through the conduit to the m-tube 232 to push the resistance rod 233 out.

[0052] The fourth embodiment: an improvement is made on the third embodiment. When the screw 241 rotates and drives the hoop body 231 to rise or fall relative to the ground, the inner rod 222 is tilted or vertical to maintain the height consistency of the hoop body 231. The adjusting member 24 includes a screw 241, a rotating block 242 and a conduit. The screw 241 and the rotating block 242 are rotationally connected, and the rotating block 242 and the hoop body 231 are damped rotationally connected. The rotating surfaces of the screw 241 and the rotating block 242, and the rotating block 242 and the hoop body 231 are perpendicular to each other; the inner rod 222 is a closed hollow structure, the screw 241 and the inner rod 222 are threadedly connected, and the end of the screw 241 is rotationally connected to the air pressure plate, the air pressure plate and the inner wall of the cavity of the inner rod 222 are closed and slidably connected, one end of the conduit is connected to the m tube 232 and the other end is connected to the inner rod 222.

[0053] A further improvement is made on the fourth embodiment, in which the bottom of the inner rod 222 is movably connected to the support foot 223 via a ball bearing, so that the support foot 223 can rotate within a range relative to the inner rod 222, so that when the inner rod 222 is supported in an inclined posture, it can still maintain a maximum contact area with the ground.

[0054] Example 3

[0055] like Figure 2 On the basis of the above embodiment, a driving mechanism 3 is further provided, and the driving mechanism 3 includes a motor 31 and a screw rod 32. The housing of the motor 31 is fixed on the base 21, the output shaft of the motor 31 is fixedly connected to the screw rod 32, and a threaded transmission is provided between the screw rod 32 and the box body 1. When the external controller controls the output shaft of the motor 31 to rotate, the motor 31 drives the screw rod 32 to rotate to adjust the position of the box body 1, so that the box body 1 moves relative to the trailer compartment.

[0056] Working principle of this utility model:

[0057] 1. This design introduces the mixed gas produced from the wellhead of the oil and gas well into the monitoring module, and uses a tomography imager and a carbon dioxide measuring instrument to analyze the composition of the mixed gas, thereby improving the monitoring accuracy of the mixed gas;

[0058] 2. This design optimizes the convenience and cleanliness of manually pushing and pulling the clamp 23 by designing the structure of the m-tube 232. At the same time, based on the structure of the m-tube 232, air pressure is used to push the resistance rod 233 to move to clamp pipes of different sizes, thereby improving the applicability of the entire design, reducing the degree of pulling of the pipe on the box 1, and reducing the probability of the box 1 tipping over.

[0059] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0060] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0061] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0062] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A carbon dioxide concentration monitoring device, characterized in that include: A box (1) having a monitoring module placed inside; The supporting mechanism (2) comprises a base (21), a sliding rod (22) and a clamp (23); the base (21) is fixed in the compartment of the trailer; the box body (1) is placed on the base (21); one end of the sliding rod (22) is slidably connected to the base (21) and the other end is connected to the clamp (23); the clamp (23) is used to lock and support the pipeline; The clamp (23) comprises a clamp body (231), an m-tube (232) and a resisting rod (233); the hollow m-tube (232) and the resisting rod (233) are tightly slidably connected, and the resisting rod (233) moves radially along the clamp body (231).

2. A carbon dioxide concentration monitoring device according to claim 1, characterized in that: The m-tube (232) includes two side arm tubes and an intermediate tube located between the two side arm tubes. The side arm tubes are connected to the air pressure source. The resistance rod (233) is airtightly slidably connected in the intermediate tube. The resistance rod (233) passes through the hoop body (231).

3. A carbon dioxide concentration monitoring device according to claim 1, characterized in that: The sliding rod (22) comprises an outer rod (221), an inner rod (222) and a support leg (223); the outer rod (221) is slidably placed in the base (21); the inner rod (222) and the outer rod (221) are rotatably connected; the hoop body (231) is connected to the top end of the inner rod (222) through an adjusting member (24); and the support leg (223) is connected to the bottom end of the inner rod (222).

4. A carbon dioxide concentration monitoring device according to claim 3, characterized in that: The support foot (223) is connected to the bottom end of the inner rod (222) via a ball bearing, and an anti-slip spike is fixed on the end surface of the support foot (223) for contacting the ground.

5. A carbon dioxide concentration monitoring device according to claim 3 or 4, characterized in that: The adjusting member (24) comprises a screw (241) and a conduit, the hoop body (231) and the screw (241) are connected in a damping rotational manner, a closed cavity is provided in the inner rod (222), the screw (241) and the cavity are threadedly connected, and the end of the screw (241) is rotationally connected to the air pressure plate, the air pressure plate and the inner wall of the cavity of the inner rod (222) are closed and slidably connected, and the conduit connects the cavity and the m-tube (232).

6. A carbon dioxide concentration monitoring device according to claim 3 or 4, characterized in that: The adjusting member (24) comprises a screw rod (241), a rotating block (242) and a conduit; the screw rod (241) and the rotating block (242) are connected in a damped rotational manner; the rotating block (242) and the hoop body (231) are connected in a damped rotational manner; the rotation directions of the screw rod (241) and the rotating block (242) and the rotating block (242) and the hoop body (231) are perpendicular to each other; a sealed cavity is provided in the inner rod (222); the screw rod (241) and the inner rod (222) are threadedly connected; the end of the screw rod (241) is rotationally connected to the air pressure plate; the air pressure plate and the inner wall of the cavity of the inner rod (222) are sealed and slidably connected; and the conduit connects the cavity and the m-tube (232).

7. A carbon dioxide concentration monitoring device according to claim 1, characterized in that: The base (21) is provided with a driving mechanism (3), comprising a motor (31) and a screw rod (32); the motor (31) is mounted on the carriage; the output shaft of the motor (31) and the screw rod (32) are fixedly connected; the screw rod (32) and the box body (1) are threadedly connected; and the box body (1) is slidably connected to the base (21).

8. A carbon dioxide concentration monitoring device according to claim 1, characterized in that: The monitoring module comprises: A tomographic imager, wherein the pipeline is used to connect the wellhead of the oil and gas well and the input port of the tomographic imager, and the output port of the tomographic imager is connected to the storage tank; The carbon dioxide measuring instrument is connected to the tomographic imager through a sampling tube, and the output port of the carbon dioxide measuring instrument is connected to the outside world.

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