Well control safety monitoring system

Abstract

The utility model provides a well control safety monitoring system which comprises a first liquid level monitoring system arranged in a rock debris tank and a second liquid level monitoring system arranged in a drilling fluid tank, and the first liquid level monitoring system and the second liquid level monitoring system are both connected with a comprehensive logging system. The second liquid level monitoring system comprises a monitoring opening formed in the upper surface of the drilling fluid tank, a wave absorbing substance arranged around the monitoring opening and a liquid level monitoring instrument fixed to the upper surface of the drilling fluid tank, and the monitoring end of the liquid level monitoring instrument faces the monitoring opening. On one hand, full coverage of the well control safety monitoring system is realized, and on the other hand, the influence of liquid level fluctuation of the drilling fluid tank on the liquid level monitoring instrument is avoided by arranging the wave-absorbing material, so that the liquid level monitoring instrument is more accurate in monitoring, and a computer can accurately calculate the total volume change of the drilling fluid; and an alarm is given in time for overflow or well leakage.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum drilling, in particular to a well control safety monitoring system. Background Art

[0002] Oil and gas reservoirs often present high well control risks, high levels of hydrogen sulfide, and high gasoline ratios. Well control is crucial for ensuring safe production. Despite well control systems and strict on-site management in some areas, serious spills and blowouts still occur. These accidents are partially due to formation factors, while others are attributed to human factors. The human factor is complex and variable, making it difficult to generalize. Even with strict regulations and on-site management, implementation may not be fully implemented. To minimize the impact of human factors, the use of modern scientific instruments for monitoring is particularly important. Scientific instruments effectively prevent human sensory fatigue and can quickly detect risks and issue alerts, making on-site response more accurate and efficient.

[0003] However, a current problem is that in some oil and gas fields, circulation monitoring systems are only installed on the drilling fluid tanks involved in the circulation process, while other key locations, such as the cement tank, reserve tank, and cuttings tank, lack monitoring devices. This is primarily due to cost considerations and technological immaturity. Furthermore, due to less stringent environmental regulations, previous approaches may have neglected to monitor the fluid levels in these tanks. This results in an inability to accurately predict formation risks, such as overflows or lost circulation, posing significant risks to well control efforts.

[0004] Even if only a liquid level monitoring system is installed on the circulation tank, monitoring personnel may misjudge and ignore early signs of risk in situations such as high-pressure, low-permeability formations or slow overflow. As overflow increases over time, they may not realize the well control risk has occurred, causing significant trouble in subsequent handling.

[0005] Furthermore, the mixer in the drilling fluid tank continuously stirs the drilling fluid, causing significant fluctuations in the liquid level. Existing liquid level monitoring systems use ultrasonic waves to detect these fluctuations. However, the calculated liquid level at peaks and troughs varies, leading to discrepancies in the calculated tank volume. This significantly impacts the accuracy of total tank volume calculations. These large fluctuations in the monitoring curve make it more difficult to identify overflows and lost circulation. Utility Model Content

[0006] The utility model provides a well control safety monitoring system. On the one hand, by providing a first liquid level monitoring system and a second liquid level monitoring system, the well control safety monitoring system achieves full coverage, thereby avoiding the risks of human factors such as inadequate perception, miscalculation, and delayed detection of overflow or well leakage. On the other hand, by providing an absorbing material, the fluctuation of the drilling fluid tank liquid level is prevented from affecting the liquid level monitoring instrument, making the liquid level monitoring instrument more accurate, more conducive to the computer to accurately calculate the total volume change of the drilling fluid, and promptly alarming for overflow or well leakage.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a well control safety monitoring system, comprising a first liquid level monitoring system arranged in a cuttings tank, and a second liquid level monitoring system arranged in a drilling fluid tank, wherein both the first liquid level monitoring system and the second liquid level monitoring system are connected to an integrated logging system;

[0008] The second liquid level monitoring system includes a monitoring port opened on the upper surface of the drilling fluid tank, an absorbing material arranged around the monitoring port, and a liquid level monitoring instrument fixed on the upper surface of the drilling fluid tank, wherein the monitoring end of the liquid level monitoring instrument is arranged toward the monitoring port.

[0009] Furthermore, the drilling fluid tank includes a circulation tank and a storage tank.

[0010] Furthermore, the upper surface of the drilling fluid tank is a steel plate or steel mesh structure, and the monitoring port is obtained by cutting on the steel plate or steel mesh structure.

[0011] Furthermore, the absorbing material is a absorbing sponge.

[0012] Furthermore, the absorbing material is detachably arranged on a side of the upper surface of the drilling fluid tank facing the liquid surface, and the absorbing material does not contact the bottom of the drilling fluid tank.

[0013] Furthermore, the wave-absorbing material is arranged away from the mixer in the drilling fluid tank.

[0014] Furthermore, the buffer tank is also equipped with a fixed hydrogen sulfide monitoring system and a comprehensive logging gas collection system.

[0015] Furthermore, it also includes a first liquid level monitoring system arranged in the metering tank, and the first liquid level monitoring system is connected to the integrated logging system.

[0016] Furthermore, the first liquid level monitoring system includes a liquid level monitoring instrument, and the liquid level monitoring instrument is connected to the integrated logging system.

[0017] Furthermore, the liquid level monitoring instrument is an ultrasonic liquid level monitor.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The utility model provides a well control safety monitoring system. By deploying a first liquid level monitoring system and a second liquid level monitoring system, the system successfully realizes comprehensive monitoring of the entire drilling operation process. Whether it is the circulation and storage of drilling fluid or the processing of rock cuttings, they are all included in the monitoring scope. This full coverage setting greatly reduces the risk of inadequate perception, miscalculation, and untimely detection of overflow or well leakage caused by human factors. Once the drilling fluid undergoes abnormal changes, such as increase or decrease, the system can immediately capture these changes and issue an early warning through the integrated logging system, so that on-site personnel can respond quickly, thereby effectively avoiding the occurrence of serious accidents.

[0020] To further improve the accuracy of the fluid level monitoring instrument, the system cleverly incorporates absorbing material (such as a wave-absorbing sponge) around the monitoring port of the drilling fluid tank. This absorber effectively attenuates or eliminates fluid level fluctuations caused by the agitator within the drilling fluid tank, ensuring that the monitoring instrument acquires more accurate and stable fluid level data. This arrangement not only smooths the monitoring curve but also eliminates the risk of false alarms caused by inaccurate monitoring instrument data. As a result, the system can more accurately calculate changes in the total volume of drilling fluid, promptly alerting personnel to overflows or lost circulation, and providing more reliable decision-making for field technicians.

[0021] The implementation of this well control safety monitoring system not only improves the accuracy and reliability of monitoring but also significantly enhances the safety and efficiency of drilling operations. By monitoring changes in drilling fluid in real time, the system can promptly detect and warn of potential well control risks, enabling on-site personnel to quickly take intervention measures. This real-time warning and rapid response mechanism significantly reduces the probability of serious accidents such as blowouts and uncontrolled blowouts. Furthermore, because the system can accurately calculate the total volume change of drilling fluid, on-site technicians can more precisely adjust drilling parameters, thereby improving the efficiency and quality of drilling operations. Therefore, the implementation of this well control safety monitoring system is of great significance for ensuring the safety of drilling operations and improving operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of drilling fluid tanks involved in recycling;

[0023] Figure 2 Drilling fluid tank wave damping device;

[0024] In the accompanying drawings: 1. Wellbore; 2. Drilling pump; 3. Weighted circulation pump [A1] or circulation pump; 4. Cuttings tank or environmental protection tank; 5. First liquid level monitoring system; 51. Metering tank; 52. Triangular tank or conical tank; 6. Buffer tank; 7. Circulation tank area; 71. Spare tank; 72. Glue tank; 73. Circulation tank; 8. Reserve tank area; 81. Reserve tank; 9. Second liquid level monitoring system; 91. Monitoring window; 92. Absorbent material; 93. Monitoring device; 94. Bottom of drilling fluid tank; 95. Upper surface of drilling fluid tank. DETAILED DESCRIPTION

[0025] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] In order to avoid the risks of human factors such as inadequate perception, miscalculation, and delayed detection of overflow or well leakage, the utility model provides a well control safety monitoring system, including a liquid level monitoring system. A liquid level monitoring system is installed in each drilling fluid tank involved in drilling fluid circulation and storage, and multiple liquid level monitoring systems are connected to the integrated logging system;

[0032] In the present invention, the drilling fluid tanks involved in the circulation and storage of drilling fluid include a circulation tank 73 and a storage tank 81 .

[0033] In the present invention, a fixed hydrogen sulfide monitoring system and a comprehensive logging gas collection system are also installed in the buffer tank 6, and the fixed hydrogen sulfide monitoring system and the comprehensive logging gas collection system are connected to the comprehensive logging system;

[0034] In the present invention, a first liquid level monitoring system 5 is provided in each of the metering tank 51 and the cuttings tank 4 . The two first liquid level monitoring systems 5 are connected to the comprehensive logging system.

[0035] like Figure 1As shown, during drilling operations, drilling fluid is returned from the wellbore 1, passes through an elevated trough, and enters a buffer tank 6. The drilling fluid then flows through the buffer tank 6 and passes through a vibrating screen. Most of the drilling fluid then passes through the vibrating screen and enters the triangular tank 52 below. Cuttings and a small amount of drilling fluid are then transferred via the vibrating screen to the cuttings tank 4, where the cuttings and circulating drilling fluid are separated. Cuttings are centrally stored in the cuttings tank 4. However, due to the drilling fluid carried by the cuttings and the "slurry run-off" of the vibrating screen, the cuttings can still be submerged in the drilling fluid. The cuttings in the cuttings tank 4 sink to the bottom of the drilling fluid tank, while the liquid remains above, making it technically feasible to install a liquid level monitoring instrument on the cuttings tank 4. When the cuttings in the cuttings tank 4 reach a certain level, they are excavated and transferred using tools such as excavators and transported to a fixed cuttings processing station for centralized processing. The drilling fluid in the cuttings tank 4 remains in the cuttings tank or is pumped to the circulating drilling fluid tank for continued circulation. After passing through the triangular tank 52, the drilling fluid enters the circulation tank 73 in the circulation tank area 7 through the degasser, desander, centrifuge, etc. The number of circulation tanks 73 is increased or decreased according to on-site needs, generally 6 to 10, and the circulation distance is adjusted according to the drilling fluid treatment requirements. Multiple circulation tanks 73 can be used as water supply tanks and directly connected to the drilling pump 2. Generally, the last circulation tank 73 is divided into two small compartments, namely the spare tank 71 and the glue tank 72. The spare tank 71 is often used to respond to emergencies and is used to hold special drilling fluids, such as plugging slurry for plugging operations. All tanks in the circulation tank area are equipped with a second liquid level monitoring system 9 for real-time continuous monitoring.

[0036] Circulation tank area 7 is connected to reserve tank area 8 via a weighted circulation pump 3. By properly switching the gates, the weighted circulation pump 3 can increase the density of the drilling fluid in individual circulation tanks 73 and reserve tanks 81. It can also transfer drilling fluid within circulation tank area 7 and reserve tank area 8 (commonly known as "slurry transfer"), or transfer drilling fluid from circulation tank area 7 to reserve tank area 8, or vice versa. For small amounts of slurry transfer, a portable pump is often used on-site.

[0037] The reserve tank area 8, according to the well depth, the complexity of the possible faults, the number of reserve tanks 81 is increased or decreased. Generally, there are 5 reserve tanks 81, 600m 3 Reserve tanks 81 primarily store desalinated water, slurry, weighted drilling fluid, and slurries of varying densities for slurry preparation. These can be self-circulated through pipelines and weighted circulation pumps 3, or transferred to circulation tanks. In emergencies, pipelines connected to drilling pumps 2 allow direct access to wellbore 1. All reserve tanks 81 are equipped with a second liquid level monitoring system 9 for continuous and intermittent monitoring.

[0038] Whether it is the circulation tank 73 or the reserve tank 81, the drilling fluid therein is a solid-liquid mixture. If it is not stirred frequently, solid-liquid separation will occur, so the drilling fluid needs to be stirred continuously. The stirring process of the mixer will cause a large fluctuation in the liquid level of the drilling fluid tank. The liquid level monitoring instrument uses the ultrasonic principle for monitoring. After the peaks and troughs below the instrument are detected by the instrument, a waveform liquid level curve will be displayed on the integrated logging screen. The impact of one tank is not too large, but the total liquid level curve superimposed by all tanks will be greatly affected. In actual production, on-site operators often keep a close eye on the total liquid level curve, and the alarm value setting of the monitoring instrument is also set according to the change of the total liquid level. Therefore, it is crucial to eliminate the impact of liquid level fluctuations on instrument monitoring.

[0039] Figure 2 For drilling fluid tank wave absorbing device, such as Figure 2 As shown, the upper surface 95 of the drilling fluid tank is generally constructed of a steel plate or steel mesh structure. A monitoring port 91 is cut into the steel plate or steel mesh structure on the upper surface 95 of the drilling fluid tank. The size and shape of the monitoring port 91 are determined according to on-site needs. The liquid level monitoring instrument 93 used by different manufacturers has different appearances and shapes, and different installation and fixing methods. A circle of wave-absorbing material 92 is provided outside the monitoring port 91. The wave-absorbing material 92 is made of a wave-absorbing sponge or the like. The wave-absorbing material 92 can reduce or eliminate the impact of drilling fluid fluctuations. Within the circle formed by the wave-absorbing material 92, the liquid level fluctuates slightly, providing a relatively stable liquid level for instrument monitoring. The distance between the wave-absorbing material 92 and the bottom 94 of the drilling fluid tank should not be too low, as this will cause great trouble to the tank cleaning operation. The wave-absorbing material 92 should be easy to disassemble and install and should also be a certain distance away from the mixer. It is best to install it in a corner of the drilling fluid tank.

[0040] When the well control safety monitoring device of the utility model is used, the specific steps are as follows:

[0041] 1. All drilling fluid tanks shall be equipped with a second liquid level monitoring system 9.

[0042] 2. During drilling and circulation operations, the liquid level monitors on the circulation tank 73 in the circulation tank area 7, the reserve tank 81 in the reserve tank area 8, and the cuttings tank 4 should be connected to the integrated logging system to closely monitor the changes in the liquid levels of these tanks, with a focus on changes in the total tank liquid volume. During normal drilling, when there is no change in the total tank volume, the mud worker adjusts the alarm value of the liquid level alarm on the circulation tank. The alarm value should be controlled at 0.5m 3 The logging personnel should set the alarm value after the total tank volume stabilizes. The alarm value of the total tank volume change should be set at 0.2m 3 ~0.3m 3 When the alarm sounded, the logging team and the drilling team worked together to identify the cause of the alarm and eliminate external factors.

[0043] If overflow is confirmed, the mud logging operator will directly notify the driller on the rig to shut in the well. After shutting in the well, the mud logging operator will record the casing pressure change value.

[0044] If it is confirmed that there is a well leakage, the mud logging operator will notify the on-duty cadre of the drilling team, and the drilling team will take measures. The mud logging team will cooperate with the drilling team and record the amount of drilling fluid leakage and calculate the leakage rate.

[0045] Since the circulation tank 73 in the circulation tank area 7 and the reserve tank 81 in the reserve tank area 8 are both equipped with a second liquid level monitoring system 9, interference with the actual monitoring situation during the addition of glue can be effectively avoided. However, it should be noted that under special circumstances, when the drilling team directly adds drilling fluid materials (defoaming agent, lubricant, etc.) in the circulation tank area 7, the logging team should be notified in advance to avoid false overflow alarms. Secondly, before the drilling team cleans the cuttings in the cuttings tank 4, the logging team should be notified in advance to avoid false well leakage alarms. During the cleaning process, the logging team should increase monitoring of the rising liquid level in the circulation tank 73 to prevent the situation where overflow cannot be discovered in time during the tank cleaning process. After cleaning the cuttings in the cuttings tank 4, the original residual drilling fluid should be retained to ensure that subsequent cuttings can be submerged in the drilling fluid.

[0046] 3. During tripping operations, the circulation tank 73 in the circulation tank area 7, the reserve tank 81 in the reserve tank area 8, and the metering tank 51 are the key monitoring objects of the integrated logging system.

[0047] If no lost circulation occurs during the pull-out operation, the total volume reduction in the drilling fluid tank, as measured by the integrated logging system, should equal the volume of the pulled-out drill string. During the on-drain operation, the total volume increase in the drilling fluid tank, as measured by the integrated logging system, should equal the volume of the pulled-out drill string. During the off-drain operation, the short-term increase in the total volume in the drilling fluid tank should equal the sum of the volume of the drill string and the volume of the drill hole. Over time, the cumulative increase should equal the volume of the drill string. Monitoring during pull-out in the event of lost circulation is crucial. The most critical concern is the coexistence of overflow and lost circulation in the well, with overflow and lost circulation occurring simultaneously. A single mistake can lead to overflow or even a blowout. Mud logging and mud workers should prioritize timely grouting during pull-out and calculate the appropriate grouting volume. If no lost circulation occurs, the grouting volume should equal the sum of the increase and decrease in volume caused by pull-out and lost circulation. The integrated logging system should indicate a slow decrease in the total volume in the drilling fluid tank. If a wellbore is experiencing lost circulation, in addition to calculating the grouting volume, the annular fluid level must also be monitored. The key to ensuring well control safety is monitoring the annular fluid level and promptly injecting drilling fluid. If the annular fluid level rises too quickly or is too close to the wellhead during injection, measures such as injecting heavier drilling fluid and pushing back should be implemented to push the severely gas-invaded drilling fluid back into the formation to ensure safe tripping.

[0048] During cementing operations, casing running is similar to tripping and running in. After casing is in place, circulation is similar to drilling. Cementing is a critical operation. Once casing is in place and circulation is complete, cementing begins. During cementing, a pump truck is connected to inject cement slurry into the wellbore. After cement slurry injection, drilling fluid is used to displace it (commonly known as displacement fluid). Metering is crucial during this displacement process. Inaccurate metering can have serious consequences. Undermetering can result in a high cement plug within the casing after the cement slurry solidifies, requiring significant time to remove the plug. Overmetering can result in the annulus being completely displaced, resulting in ineffective cementing and complicated remedial measures. Displacement fluid measurement is typically performed independently during mud logging, drilling, and cementing to reduce the risk of operational errors. Mud logging involves calculating the drilling pump strokes and converting them into volume. Drilling metering involves the mud worker measuring the volume of drilling fluid entering and exiting the circulation tank. Cementing metering uses the cementing equipment's built-in flowmeter. In the absence of lost circulation, cement slurry should return to the surface, and a certain amount of cement slurry and drilling fluid mixture should enter cuttings tank 4. Therefore, by monitoring the increase in the liquid level in cuttings tank 4, the height of the cement slurry in the wellbore can be inferred, providing a basis for calculating the displacement volume and decision-making for releasing the rubber plug. When cementing in the presence of lost circulation, the cementing loss volume can be calculated by monitoring the drop in the liquid level in the circulation tank area 7, and the possible height of the cement slurry bottom can be determined by calculating the displacement volume.

[0049] 5. During the plugging operation, since plugging materials are added to the drilling fluid, a single circulation tank is required to prepare the plugging slurry. When the amount is large, the circulation tank 73 is used, and when the amount is small, the spare tank 71 is used. The amount of drilling fluid loss during the plugging operation is known by monitoring the reduction in the total tank volume of the drilling fluid tank.

[0050] 6. During electrical measurement operations, drilling and circulation operations should be carried out simultaneously.

[0051] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0052] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any changes made based on the technical solution in accordance with the technical concept proposed by the present utility model shall fall within the scope of protection of the claims of the present utility model.

Claims

1. A well control safety monitoring system, characterized in that: It comprises a first liquid level monitoring system (5) arranged in a cuttings tank (4), and a second liquid level monitoring system (9) arranged in a drilling fluid tank, wherein the first liquid level monitoring system (5) and the second liquid level monitoring system (9) are both connected to the integrated logging system; The second liquid level monitoring system (9) comprises a monitoring port (91) opened on the upper surface (95) of the drilling fluid tank, a wave-absorbing material (92) arranged around the monitoring port (91), and a liquid level monitoring instrument (93) fixed to the upper surface (95) of the drilling fluid tank, wherein the monitoring end of the liquid level monitoring instrument (93) is arranged toward the monitoring port (91).

2. A well control safety monitoring system according to claim 1, characterized in that: The drilling fluid tank comprises a circulation tank (73) and a storage tank (81).

3. A well control safety monitoring system according to claim 1 or 2, characterized in that: The upper surface (95) of the drilling fluid tank is a steel plate or steel mesh structure, and the monitoring port (91) is obtained by cutting on the steel plate or steel mesh structure.

4. A well control safety monitoring system according to claim 1 or 2, characterized in that: The wave-absorbing material (92) is a wave-absorbing sponge.

5. A well control safety monitoring system according to claim 4, characterized in that: The wave-absorbing material (92) is detachably arranged on a side of the upper surface (95) of the drilling fluid tank facing the liquid surface, and the wave-absorbing material (92) does not contact the bottom (94) of the drilling fluid tank.

6. A well control safety monitoring system according to claim 4, characterized in that: The wave absorbing material (92) is arranged away from the mixer in the drilling fluid tank.

7. A well control safety monitoring system according to claim 1, characterized in that: The buffer tank (6) is also provided with a fixed hydrogen sulfide monitoring system and a comprehensive logging gas collection system.

8. A well control safety monitoring system according to claim 1, characterized in that: It also includes a first liquid level monitoring system (5) arranged in the metering tank (51), and the first liquid level monitoring system (5) is connected to the integrated logging system.

9. A well control safety monitoring system according to claim 8, characterized in that: The first liquid level monitoring system (5) includes a liquid level monitoring instrument, which is connected to the integrated logging system.

10. A well control safety monitoring system according to claim 1 or 9, characterized in that: The liquid level monitoring instrument is an ultrasonic liquid level monitor.

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