Logging gas circuit control device and control circuit
By controlling the on/off state of the sample gas pipeline through control switches and sensing components, the problem of asynchronous analysis between the sample gas and drilling equipment was solved, and the correspondence between the sample gas analysis results and the formation depth was realized, ensuring the accuracy and synchronization of the analysis results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the gas analysis in the logging gas path is not synchronized with the operation of the drilling equipment, resulting in the analysis results not corresponding to the formation depth.
By employing control switches, sensing components, and control circuits, the flow of the sample gas pipeline is controlled by sensing the pressure of drilling products within the well, ensuring that sample gas analysis is performed synchronously with the drilling equipment.
This achieved a correspondence between the gas sample analysis results and the formation depth, ensuring the accuracy and synchronicity of the analysis results.
Smart Images
Figure CN224152872U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drilling technology, and in particular to a logging gas path control device and control circuit. Background Technology
[0002] In the oil and gas production process, when the drilling equipment is working, it moves continuously downwards, and drilling products are produced in the well. The drilling products are collected and analyzed to obtain analytical data. Based on the analysis results, the formation information in the well can be inferred to guide production.
[0003] In existing technologies, logging gas lines are commonly used to collect and analyze drilling products. For example, Figure 1 As shown, a commonly used logging gas path 10 includes a buffer tank 101, a degasser 102, a sample gas line 103, and an analysis unit 104. The buffer tank 101 continuously collects drilling products. The degasser 102, located inside the buffer tank 101, separates the gases contained in the products to obtain sample gas for processing. The sample gas line 103 is located between the degasser 102 and the analysis unit 104, allowing the sample gas obtained after separation by the degasser 102 to travel along the sample gas line 103 to the analysis unit 104, where the analysis unit 104 analyzes the sample gas. Therefore, based on the different results of the sample gas analysis, formation information at different depths within the well can be inferred.
[0004] In this setup, while formation information within the well can be effectively analyzed, the distance between the analysis unit 104 and the buffer tank 101 is relatively large, resulting in a delay in the gas analysis process. In other words, after the drilling equipment has stopped operating, sample gas remains in the sample gas pipeline. The analysis unit continues to analyze this retained sample gas, causing the gas analysis to be out of sync with the drilling equipment's operation, thus leading to analysis results that do not correspond to the formation depth.
[0005] Therefore, how to achieve the correspondence between sample gas analysis and formation depth is an urgent problem to be solved. Utility Model Content
[0006] The purpose of this utility model is to provide at least one logging gas path control device and control circuit, which can at least solve the technical problem of asynchronous operation between sample gas analysis and drilling equipment, and at least achieve the technical effect of corresponding sample gas analysis results with formation depth.
[0007] To address the aforementioned technical problems, at least one embodiment of this application provides a logging gas path control device, including a degasser, a sample gas pipeline, an analysis mechanism, a control switch, a sensing component, and a control circuit. One end of the sample gas pipeline is connected to the degasser, and the other end is connected to the analysis mechanism. The control switch is located on the sample gas pipeline and is used to control the on / off state of the sample gas pipeline. The control circuit is connected to both the control switch and the sensing component. The sensing component is used to sense the pressure of drilling products in the well. Based on the sensing result of the sensing component, the control circuit controls the opening or closing of the control switch. When the control switch is open, the sample gas pipeline is connected, the degasser and the analysis mechanism are connected, and the analysis mechanism analyzes the sample gas in the sample gas pipeline. When the control switch is closed, the sample gas pipeline is blocked, the degasser and the analysis mechanism are disconnected, and the analysis mechanism stops analyzing the sample gas.
[0008] At least one embodiment of this application also provides a logging gas path control circuit, including a logging gas path control device as described above, and a follower circuit and a switch circuit connected in sequence. The input terminal of the follower circuit is connected to the output terminal of the sensing component, and its output terminal is connected to the input terminal of the switch circuit. The follower circuit is used to follow the sensing signal output by the sensing component. The output terminal of the switch circuit is connected to a control switch, and the switch circuit controls the opening or closing of the control switch according to the sensing signal of the sensing component.
[0009] The embodiments of this application provide a logging gas path control device and control circuit. Compared with the prior art, it uses a control switch to control the on / off of the sample gas pipeline and uses a bypass pipe to fill the control device with gas to ensure stable gas pressure inside the control device. Because the control switch is used to control the on / off of the sample gas pipeline, sample gas analysis is performed when the drilling equipment is turned on and when the drilling equipment is stopped. Therefore, it solves the technical problem of asynchronous sample gas analysis and drilling start / stop, and realizes the technical effect of the sample gas analysis results corresponding to the formation depth.
[0010] In addition, the well logging gas path control device is characterized by further including a bypass pipe, one end of which is connected to a control switch and the other end is suspended. When the control switch is turned on, the sample gas pipeline is connected, the degasser is connected to the analysis mechanism, the analysis mechanism analyzes the sample gas in the sample gas pipeline, and the bypass pipe is turned off. When the control switch is turned off, the degasser is connected to the bypass pipe, the bypass pipe inputs atmospheric air into the degasser, the degasser is disconnected from the analysis mechanism, and the analysis mechanism stops analyzing the sample gas.
[0011] The presence of the bypass pipe allows the gas pressure inside the control device to be connected to atmospheric pressure when the sample gas analysis is shut off, thus avoiding negative pressure within the control device.
[0012] In addition, the well logging gas path control device further includes a bypass pipe and a constant pressure gas source. One end of the bypass pipe is connected to a control switch, and the other end is connected to the constant pressure gas source. When the control switch is turned on, the sample gas pipeline is connected, the degasser is connected to the analysis mechanism, and the analysis mechanism analyzes the sample gas in the sample gas pipeline. When the control switch is turned off, the degasser is connected to the bypass pipe, the bypass pipe inputs constant pressure gas into the degasser, the degasser is disconnected from the analysis mechanism, and the analysis mechanism stops analyzing the sample gas.
[0013] The presence of the bypass pipe and constant pressure gas source ensures that constant pressure gas is input into the control device through the bypass pipe when judging the analysis mechanism, thus ensuring the stability of the gas pressure in the control device.
[0014] In addition, the control switch includes a solenoid valve, which is used to control the on / off state of the sample gas pipeline. This method is low-cost and easy to implement.
[0015] In addition, the sensing component includes a pressure sensor for detecting pressure during drilling. Based on the difference in gas pressure inside the well when the drilling equipment is running and stopped, it determines whether the drilling equipment is working, and controls the working state of the analysis unit according to the working state of the drilling equipment, so as to ensure that the gas sample analysis results correspond to the formation depth.
[0016] In addition, the switching circuit includes a transistor and a relay. The control terminal of the transistor is connected to the output terminal of the follower circuit, and its input terminal is connected to one end of the relay coil. The other end of the relay coil is connected to a DC power supply, and the switch of the relay is connected to the power supply terminal of the control switch.
[0017] A transistor is used to control the relay to start or stop based on the pressure sensor's readings, thereby controlling the control switch and enabling low-pressure signals to control high-pressure signals.
[0018] In addition, the control circuit also includes a filtering circuit, the input of which is connected to the output of the sensing component, for filtering the sensing signal output by the sensing component.
[0019] A filtering circuit is used to process the sensed signal, ensuring the accuracy of the sensed signal. Attached Figure Description
[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0021] Figure 1 This is a schematic diagram of the structure of the logging gas path in the existing technology;
[0022] Figure 2 This is a schematic diagram of a logging gas path control device according to an embodiment of the present invention;
[0023] Figure 3 This is a schematic diagram of the structure of the logging gas path control device II according to an embodiment of the present invention;
[0024] Figure 4 This is a schematic diagram of the logging gas path control circuit structure provided according to an embodiment of the present utility model. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to enable readers to better understand this utility model. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various changes and modifications based on the following embodiments.
[0026] Example 1:
[0027] The present invention relates to a logging gas path control device, comprising a degasser, a sample gas pipeline, an analysis mechanism, a control switch, a sensing component, and a control circuit. The control switch is located on the sample gas pipeline to control the opening and closing of the sample gas pipeline. One end of the sample gas pipeline is connected to the degasser, and the other end is connected to the analysis mechanism. The control circuit is connected to both the control switch and the sensing component. The sensing component is used to sense whether there are drilling products in the well. The control circuit controls the opening or closing of the control switch based on the sensing result of the sensing component. When the control switch is open, the sample gas pipeline is connected, the degasser and the analysis mechanism are connected, and the analysis mechanism analyzes the sample gas in the sample gas pipeline. When the control switch is closed, the sample gas pipeline is blocked, the degasser and the analysis mechanism are disconnected, and the analysis mechanism stops analyzing the sample gas.
[0028] Compared with the prior art, the embodiment of this utility model adopts a control switch, a sensing component, and a control circuit. The sensing component is used to sense the gas contained in the drilling products in the well. The control circuit controls the opening or closing of the control switch based on the sensing results received from the sensing component. The on / off state of the control switch determines the on / off state of the sample gas pipeline. Thus, when the drilling equipment starts, the control switch is opened, and the sub-mechanism analyzes the sample gas. When the drilling equipment stops, the control switch is closed, and the analysis mechanism stops analyzing the sample gas. Therefore, the technical problem of synchronizing the sample gas analysis with the drilling equipment is solved, and the technical effect of the sample gas analysis being consistent with the drilling depth is achieved.
[0029] The sensing components include a pressure sensing device for sensing the gas pressure inside the well. When the drilling equipment starts, the drilling products inside the well contain gas. The pressure sensing device senses the gas pressure and sends a first pressure signal to the control circuit. Based on the first pressure signal, the control circuit controls the control switch to open, and the sample gas pipeline connects the buffer tank and the analysis unit. The analysis unit then analyzes the sample gas. When the drilling equipment stops, there are no drilling products inside the well, and the pressure sensing device cannot sense the gas pressure. It then sends a second pressure signal to the control circuit. Based on the second pressure signal, the control circuit controls the control switch to close, and the sample gas pipeline disconnects the buffer tank from the analysis unit. The analysis unit then stops working.
[0030] By employing pressure sensing devices, the working status of drilling equipment can be detected in real time, ensuring that the working status of drilling equipment is synchronized with that of the analysis mechanism.
[0031] The sensing components, control switches, and control circuits interact with each other wirelessly or via wired means.
[0032] The control switch includes a solenoid valve, which performs switching actions according to the control signal given by the control circuit to realize the opening and closing of the sample gas pipeline.
[0033] The logging gas path control device of this embodiment also includes a bypass pipe. One end of the bypass pipe is connected to a control switch, and the other end is suspended. When the control switch is turned off, the degasser is connected to the bypass pipe, the degasser is connected to the atmosphere, the gas pressure in the degasser is maintained, and the sample gas line is turned off. When the control switch is turned on, the sample gas line is connected to the degasser, the sample gas is transmitted to the distributor mechanism through the sample gas line for the distributor of the sample gas, and the bypass pipe is turned off.
[0034] In one specific embodiment of this application, a bypass pipe and a constant pressure gas source are also included. One end of the bypass pipe is connected to a control switch, and the other end is connected to the constant pressure gas source. When the control switch is turned off, the sample gas line is turned off, the degasser is connected to the bypass pipe, and the constant pressure gas source provides constant pressure gas to the well to ensure stable gas pressure inside the device. When the control switch is turned on, the sample gas line is connected to the degasser, and the bypass pipe is turned off.
[0035] In one specific embodiment of this application, a power supply is also included, which is connected to the control circuit, the sensing component, and the control switch respectively, for providing electrical energy to the control circuit, the sensing component, and the control switch.
[0036] The control switch is connected to the bypass pipe, which is used to supply atmospheric air or constant pressure gas to the logging gas circuit control device of this application when the control switch is turned off, so as to keep the internal gas pressure of the device of this application stable.
[0037] Example 2
[0038] The embodiments of this utility model are a detailed description of the above-described embodiment 1, see [link to embodiment 1]. Figure 2 and Figure 3 .
[0039] This utility model provides a well logging gas path control device, including: a degasser 102, a sample gas pipeline 103, an analysis mechanism 104, a control switch 1, a sensing component 2, and a control circuit 3. The degasser 102 is disposed within a buffer tank 101. The sample gas pipeline 103 connects the degasser 102 and the analysis mechanism 104, forming a gas channel between them. The control switch 1 is installed on the sample gas pipeline 103, controlling its on / off state to determine whether sample gas is transmitted to the analysis mechanism 104. The sensing component 2 is installed inside the well to sense the gas pressure and transmits the sensing result to the control circuit 3. Based on the sensing result, the control circuit 3 outputs a control signal to the control switch 1, which then activates or deactivates the sample gas pipeline 103 according to the control signal.
[0040] After the drilling equipment is started, the buffer tank 101 can continuously collect the drilling products drilled out by the drilling equipment. The degasser 102 continuously separates the gas contained in the drilling products to obtain sample gas to be processed. The sensing component 2 senses the gas pressure generated by the gas in the drilling products and outputs a first gas pressure signal to the control circuit 3. The control circuit 3 receives the first gas pressure signal and outputs a first control signal to the control switch 1. The control switch 1 is turned on, the sample gas pipeline 103 is connected, and the gas in the degasser 102 is transmitted to the analysis unit 104 through the sample gas pipeline 103. The analysis unit 104 analyzes the sample gas and infers the formation information at different depths in the well based on the analysis results, so as to realize the simultaneous start-up of the analysis unit 104 and the drilling equipment.
[0041] After the drilling equipment stops working, there is no drilling product in the well, the buffer tank 101 cannot collect drilling product, the degasser 102 cannot separate gas, the sensing component 2 senses the lack of gas pressure, and outputs a second gas pressure signal to the control circuit 3. The control circuit 3 receives the second gas pressure signal and outputs a second control signal to the control switch 1. The control switch 1 is turned off, the sample gas pipeline 103 is turned off, and the analysis unit 104 stops analysis when there is no gas, so that the analysis unit 104 and the drilling equipment stop at the same time.
[0042] In one specific embodiment of this application, a bypass pipe 5 is also included. The third terminal of the control switch is connected to one end of the bypass pipe 3, and the other end of the bypass pipe 5 is suspended. After the drilling equipment is started, the sensing component 2 senses the gas pressure generated by the gas in the drilling products and outputs a first gas pressure signal to the control circuit 3. The control circuit 3 receives the first gas pressure signal and outputs a first control signal to the control switch 1. The control switch 1 is turned on, the sample gas pipeline 103 is connected, the degasser 102 is connected to the analysis unit 104, and the sample gas is transmitted to the sub-unit 104 along the sample gas pipeline 103. The connection between the bypass pipe 5 and the degasser 102 is turned off. After the drilling equipment stops working, the sensing component 2 senses no gas pressure and outputs a second gas pressure signal to the control circuit 3. The control circuit 3 receives the second gas pressure signal and outputs a second control signal to the control switch 1. The control switch 1 controls the sample gas pipeline 103 to turn off and connects the degasser 102 and the bypass pipe 5. Air is supplied to the drilling site through the bypass pipe 5 to maintain the stable gas pressure in the device described in this application.
[0043] In another specific embodiment of this application, a bypass pipe 5 and a constant pressure gas source 105 are also included. The third terminal of the control switch is connected to one end of the bypass pipe 3, and the other end of the bypass pipe 3 is connected to the constant pressure gas source 105. After the drilling equipment is started, the sensing component 2 senses the gas pressure generated by the gas in the drilling products and outputs a first gas pressure signal to the control circuit 3. The control circuit 3 receives the first gas pressure signal and outputs a first control signal to the control switch 1. The control switch 1 is opened, the sample gas pipeline 103 is connected, and the degasser 102 and the analysis unit 1 are connected. When 04 is turned on, the sample gas is transmitted to the analysis unit 104 along the sample gas pipeline 103, and the connection between the bypass pipe 5 and the degasser 102 is turned off. After the drilling equipment stops working, the sensing component 2 senses that there is no gas pressure and outputs a second gas pressure signal to the control circuit 3. The control circuit 3 receives the second gas pressure signal and outputs a second control signal to the control switch 1. The control switch 1 controls the sample gas pipeline 103 to turn off and connects the degasser 102 and the bypass pipe 5. Constant pressure gas is delivered to the drilling site through the bypass pipe 5 to maintain the stable gas pressure in the device described in this application.
[0044] Example 3
[0045] The present invention also provides a logging gas path control circuit, including a filter circuit, a follower circuit and a switch circuit connected in sequence. The input terminal of the filter circuit is connected to the output terminal of the sensing component 2, and the output terminal of the switch circuit is connected to the control switch.
[0046] The filtering circuit includes a capacitor C1, one end of which is connected to the output terminal of the sensing component 2, and the other end is grounded to GND, which is used to filter the sensing signal of the sensing component 2.
[0047] The follower circuit includes an amplifier U1. The positive input terminal of the amplifier is connected to the output terminal of the sensing component 2 through a resistor R1, and its negative input terminal is connected to the output terminal. It is used to follow the sensing signal and improve the driving capability of the sensing signal.
[0048] The switching circuit includes transistor Q1. The control terminal of transistor Q1 is connected to the output terminal of the follower circuit through resistor R2. Its input terminal is connected to one end of the coil of relay K1. The other end of the coil of relay K1 is connected to the power supply VDD. The output terminal of transistor Q1 is connected to ground GND. The switching terminal of relay K1 is connected to the power supply terminal of the solenoid valve.
[0049] In one specific embodiment of this application, the sensing component outputs a high level when it detects air pressure and outputs a low level when it detects no air pressure.
[0050] When the sensing signal is high, transistor Q1 in the switching circuit is turned on, relay K1 is energized, the relay switch is turned on, the control solenoid valve is opened, the sample gas line 103 is connected, the degasser 102 is connected to the analysis mechanism 104, and the analysis mechanism 104 analyzes the gas flowing through the sample gas line 103.
[0051] When the sensing signal is low, transistor Q1 in the switching circuit is cut off, no current flows through the coil of relay K1, the relay does not operate, the relay switch is not connected, there is no current in the solenoid valve and it does not operate, the sample gas pipeline 103 is blocked, the degasser 102 and the analyzer 104 are not connected, and the analyzer 104 stops analyzing.
[0052] It should be understood that the terms "mechanism," "device," "component," etc., used in this application are merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they can be replaced by other expressions.
[0053] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention. In practical applications, the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification, and various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.
Claims
1. A mud gas control device, characterized in that, include: The sample gas pipeline consists of a degasser, a sample gas line, an analytical unit, a control switch, a sensing component, and a control circuit. One end of the sample gas line is connected to the degasser, and the other end is connected to the analytical unit. The control switch is located on the sample gas line and is used to control the on / off state of the sample gas line. The control circuit is connected to the control switch and the sensing component respectively. The sensing component is used to sense whether there is pressure generated by drilling products within the well: The control circuit controls the opening or closing of the control switch based on the sensing results of the sensing component. The analytical mechanism is used to connect the sample gas pipeline and the degasser when the control switch is turned on, so that the analytical mechanism can analyze the sample gas in the sample gas pipeline. When the control switch is turned off, the sample gas pipeline is blocked, the degasser is disconnected from the analytical mechanism, and the analytical mechanism stops analyzing the sample gas.
2. The mud gas control device of claim 1, wherein, It also includes a bypass pipe, one end of which is connected to the control switch and the other end is suspended. When the control switch is turned on, the sample gas pipeline is connected, the bypass pipe is turned off, the degasser is connected to the analysis unit, and the analysis unit analyzes the sample gas in the sample gas pipeline. When the control switch is turned off, the degasser is connected to the bypass pipe, the bypass pipe inputs atmospheric air into the degasser, the degasser is disconnected from the analysis unit, and the analysis unit stops analyzing the sample gas.
3. The mud gas control device of claim 1, wherein, Also includes: The bypass pipe and constant pressure gas source are connected at one end to the control switch and at the other end to the constant pressure gas source. When the control switch is turned on, the sample gas pipeline is connected, the degasser is connected to the analysis unit, the analysis unit analyzes the sample gas in the sample gas pipeline, and the bypass pipe is turned off. When the control switch is turned off, the degasser is connected to the bypass pipe, and the bypass pipe inputs constant pressure gas into the degasser. The degasser is then disconnected from the analysis unit, and the analysis unit stops analyzing the sample gas.
4. The mud gas control device of claim 1, wherein, The control switch includes a solenoid valve.
5. The mud gas control device of claim 1, wherein, The sensing components include a pressure sensor.
6. A mud-gas control circuitry applied in the control device according to any one of claims 1-5, characterized in that, It includes a follower circuit and a switch circuit connected in sequence. The input terminal of the follower circuit is connected to the output terminal of the sensing component, and its output terminal is connected to the input terminal of the switch circuit. The follower circuit is used to follow the sensing signal output by the sensing component. The output terminal of the switch circuit is connected to the control switch. The switch circuit controls the opening or closing of the control switch according to the sensing signal of the sensing component.
7. The mud logging gas path control circuit of claim 6, wherein, The switching circuit includes a transistor and a relay. The control terminal of the transistor is connected to the output terminal of the follower circuit, and its input terminal is connected to one end of the relay coil. The other end of the relay coil is connected to a DC power supply, and the relay switch is connected to the power supply terminal of the control switch.
8. The mud logging gas path control circuit of claim 6, wherein, The control circuit also includes a filtering circuit, the input of which is connected to the output of the sensing component, for filtering the sensing signal output by the sensing component.