CN220365545U - Drilling outlet flow monitoring and well control overflow leakage early warning system groove body assembly - Google Patents

Abstract

The utility model discloses a drilling outlet flow monitoring and well control overflow early warning system tank body assembly, which comprises a tank body, wherein the tank body is provided with an inlet communicated with the inside of the tank body, one end of the tank body, which is far away from the inlet, is provided with an outlet communicated with the inside of the tank body, a baffle plate assembly is arranged in the tank body, a drilling fluid rectifying area is formed between the baffle plate assembly and the inner side wall of the tank body at one end, which is close to the inlet, of the tank body, a drilling fluid backflow area is formed between the baffle plate assembly and the inner side wall of the tank body at one end, which is close to the outlet, and a drilling fluid channel, which is communicated with the drilling fluid rectifying area and the drilling fluid backflow area, is formed between the baffle plate assembly and the inner side wall of the tank body. According to the utility model, the drilling fluid entering the tank body is guided and arranged through the baffle plate assembly, and the measurement effect of the flow measuring instrument is combined, so that the flow can be directly measured under the condition of no full pipe, and the measurement result is not influenced by mud cakes attached to the inner wall; through the effect of baffle and guide plate, solve the box and subside husky problem, reduce on-the-spot personnel's operation intensity.

Description

Drilling outlet flow monitoring and well control overflow leakage early warning system groove body assembly

Technical Field

The utility model belongs to the field of drilling fluid measurement and early warning, and particularly relates to a tank body assembly of a drilling outlet flow monitoring and well control overflow and leakage early warning system.

Background

Drilling fluid commonly known as drilling mud; in drilling operations, it is often necessary to provide a mud pit, circulation tank or buffer tank in the drilling fluid circulation system in order to ensure proper circulation of the drilling fluid. The existing sensors for logging are generally arranged on a circulating tank or a buffer tank and mainly comprise a liquid level meter, a densimeter, a thermometer, a conductivity meter, a degasser, a harmful gas alarm, camera equipment and the like, the sensor is low in integration level, high in failure rate and large in use condition limitation, when the sensor is abnormal, the sensor is difficult to judge failure, and parameter measurement is greatly influenced by environment. The dynamic flow is indirectly monitored through the liquid level, the density of the drilling fluid is indirectly monitored by adopting a double-diaphragm differential pressure sensor, and the double-diaphragm differential pressure sensor is used as an important monitoring means in well control, is the first place for overflow discovery, but the use of the existing metering technology is greatly limited due to the property of drilling return mud and the specificity of on-site processes (no full pipe, emptying and normal pressure), for example, when the flow is reduced and the liquid level is lower, the double-diaphragm differential pressure sensor and the temperature sensor are not completely submerged, so that the measured density and the temperature parameter are abnormal; for example, when the water vapor is large and the temperature is high, local micro pressure or slurry splashing is generated, and the like, which leads to large error or incorrect measurement result, so that the accurate condition of the returned drilling fluid cannot be accurately mastered; in addition, the existing buffer tank or the existing reflux tank is seriously settled sand, frequent cleaning is needed, when an abnormal condition (such as overflow or leakage) occurs underground in the drilling stopping or drilling process, the abnormal display of the system reflects lag or can not be displayed abnormally, so that quick and accurate well control response measures are not made, and then well kick and blowout accidents occur, and life and property are seriously lost. Therefore, the research on the technique of measuring the flow of the drilling fluid without filling the pipe and monitoring the overflow leakage has great significance for realizing accurate well control, reducing the safety risk and reducing the life and property loss. However, the existing drilling outlet mud measurement and overflow leakage early warning system cannot accurately measure drilling fluid; meanwhile, the overflow early warning is inaccurate, and the actual production requirement cannot be met.

To measure the drilling fluid and pre-warn of spills, it is necessary to direct the drilling fluid to a specific area (e.g., tank, box, etc.) to facilitate the installation of various sensors for measurement. The existing components for measuring and warning the overflow leakage often only have the function of guiding the drilling fluid into the components, and cannot better ensure the effects of measuring and warning the overflow leakage; meanwhile, the problems of sand settling and the like cannot be solved.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a tank body component of a drilling outlet flow monitoring and well control overflow and leakage early warning system, which is used for guiding and arranging drilling fluid entering the tank body through a baffle component, and can realize direct measurement of flow under the condition of no full pipe by combining the measurement effect of a flow measuring instrument without influencing the measurement result by mud cakes attached to the inner wall; through the effect of baffle and guide plate, solve the box and subside husky problem, reduce on-the-spot personnel's operation intensity.

The technical scheme adopted by the utility model is as follows: the utility model provides a well drilling export flow monitoring and well control overflow early warning system cell body subassembly, includes the cell body, cell body wherein one end be equipped with the inside entry of intercommunication of cell body, the cell body keep away from the one end of entry be equipped with the inside export of intercommunication of cell body, be equipped with the baffle subassembly in the cell body, form drilling fluid rectification district in the one end that is close to the entry between baffle subassembly and the cell body inner wall, form drilling fluid reflux district in the one end that is close to the export between baffle subassembly and the cell body inner wall, form the drilling fluid passageway that can supply drilling fluid to pass through and communicate drilling fluid rectification district and drilling fluid reflux district between baffle subassembly and the cell body inner wall.

In one embodiment, the baffle assembly comprises a fixed baffle connected with the tank body and a movable baffle arranged on the fixed baffle, a drilling fluid channel which is communicated with the drilling fluid rectifying area and the drilling fluid reflux area and can be used for fluid to pass through is formed between the fixed baffle and the inner side wall of the tank body, and a filtering rectifying hole which is communicated with the drilling fluid rectifying area and the drilling fluid reflux area is arranged on the movable baffle.

In one embodiment, the bottom of the tank body is provided with a deflector inclined along the outlet direction.

In one embodiment, the deflector comprises a first deflector segment arranged at one end of the drilling fluid rectifying area and a second deflector segment arranged in the drilling fluid reflux area, wherein the first deflector segment and the second deflector segment are inclined along the outlet direction.

In one embodiment, the side of the tank body opposite to the inlet is provided with an anti-overflow port.

The utility model has the beneficial effects that:

1. the drilling fluid entering the tank body is guided and arranged through the baffle plate assembly, and the measurement effect of the flow measuring instrument is combined, so that the flow can be directly measured under the condition of no full pipe, and the measurement result is not influenced by mud cakes attached to the inner wall;

2. through the effect of baffle subassembly and guide plate, solve the cell body and subside husky problem, reduce on-the-spot personnel's operation intensity.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of the trough body of the present utility model;

FIG. 3 is a schematic view of a separator assembly according to the present utility model;

FIG. 4 is a schematic view of a baffle structure according to the present utility model;

FIG. 5 is a schematic diagram of a system for measuring mud at the outlet of a well drilling and warning the overflow leakage;

FIG. 6 is a schematic diagram of a drilling fluid rectifying section, a drilling fluid passage, and a drilling fluid recirculation section of the drilling fluid outlet mud measurement and overflow warning system of the present utility model;

FIG. 7 is a schematic diagram showing the connection of components of a drilling fluid measurement management system of the drilling outlet mud measurement and overflow leakage early warning system of the present utility model;

FIG. 8 is a schematic diagram of a flow meter of the system for measuring mud at the outlet of a well drilling and warning the overflow leakage.

In the figure: 1. a tank body; 2. a drilling fluid measurement management system; 3. an inlet; 4. an outlet; 5. a separator assembly; 6. a drilling fluid rectifying section; 7. a flow meter; 8. a sampling pipeline; 9. a sampling flow meter; 10. an inlet level gauge; 11. an outlet liquid level measuring instrument; 12. a deflector; 13. a drilling fluid return zone; 14. a drilling fluid passage; 15. a measurement zone; 16. an anti-overflow port; 17. a cleaning port; 18. a conductivity meter; 19. a deaerator; 20. a well cementation mud interface; 201. a control module; 202. a data operation module; 203. a data acquisition module; 204. a data conversion module; 205. a communication module; 206. a data storage module; 207. a display screen; 501. fixing the partition board; 502. a movable partition; 503. filtering the rectifying hole; 701. a transmitter; 702. an antenna; 1201. a first flow directing section; 1202. and a second diversion section.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific examples.

As shown in fig. 1-4, the utility model discloses a drilling outlet flow monitoring and well control overflow warning system tank assembly, which comprises a tank body 1, wherein one end of the tank body 1 is provided with an inlet 3 communicated with the inside of the tank body 1, one end, far away from the inlet 3, of the tank body 1 is provided with an outlet 4 communicated with the inside of the tank body 1, a baffle assembly 5 is arranged in the tank body 1, a drilling fluid rectifying area 6 is formed between the baffle assembly 5 and the inner side wall of the tank body 1 at one end, close to the inlet 3, of the tank body, a drilling fluid backflow area 13 is formed between the baffle assembly 5 and the inner side wall of the tank body 1 at one end, close to the outlet 4, and a drilling fluid channel 14 which can be used for passing drilling fluid and is communicated with the drilling fluid rectifying area 6 and the drilling fluid backflow area 13 is formed between the baffle assembly 5 and the inner side wall of the tank body 1.

In this embodiment, the partition board assembly 5 includes a fixed partition board 501 connected to the tank body 1 and a movable partition board 502 disposed on the fixed partition board 501, a drilling fluid channel 14 communicating the drilling fluid rectifying area 6 and the drilling fluid reflux area 13 and allowing fluid to pass through is formed between the fixed partition board 501 and the inner side wall of the tank body 1, and a filtering rectifying hole 503 communicating the drilling fluid rectifying area 6 and the drilling fluid reflux area 13 is disposed on the movable partition board 502.

In this embodiment, a deflector 12 inclined along the direction of the outlet 4 is disposed at the bottom of the tank body 1.

In this embodiment, the deflector 12 includes a first deflector segment 1201 disposed at one end of the drilling fluid rectifying area 6 and a second deflector segment 1202 disposed in the drilling fluid reflux area 13, where the first deflector segment 1201 and the second deflector segment 1202 are both inclined along the direction of the outlet 4.

In this embodiment, the side of the tank body 1 opposite to the inlet 3 is provided with an anti-overflow port 16.

The fixed baffle 501 is used for enabling the drilling fluid rectifying area 6 in the tank body 1 to form favorable drilling fluid circulation according to a specific path so as to enable the drilling fluid to smoothly flow, reduce dead zone formation and avoid local sand settling, thereby meeting the measurement requirement. The movable partition 502 is matched with the filtering rectifying hole 503 arranged on the movable partition 502 to be used for filtering the secondary rectification of drilling fluid and isolating the interference of large-particle rock debris, and provides better measurement and adjustment effects for flow measurement.

The setting of guide plate 12 of this application makes drilling fluid flow by entry 3 to export 4 (from high to low) according to the design route, and dead angle area all adopts pre-buried mode in advance to fill, prevents that drilling fluid from settling sand in cell body 1, reduces the maintenance degree of difficulty and cost.

The anti-overflow port 16 that this application set up can be in drilling fluid enter into cell body 1 in a large number and can't be smoothly from drilling fluid rectification district 6 enter into drilling fluid reflux zone 13 the circumstances, retrieve drilling fluid, prevent the loss of drilling fluid.

As shown in fig. 5-8, a drilling outlet flow monitoring and well control overflow and leakage early warning system measuring tank described in the application is used in combination with a drilling outlet flow monitoring and well control overflow and leakage early warning system to realize drilling fluid measurement and overflow and leakage early warning. A drilling outlet flow monitoring and well control overflow leakage early warning system include cell body 1 and drilling fluid measurement management system 2, cell body 1 wherein one end be equipped with cell body 1 inside intercommunication's entry 3, cell body 1 keep away from entry 3 one end be equipped with cell body 1 inside intercommunication's export 4, be equipped with baffle subassembly 5 in the cell body 1, form drilling fluid rectification district 6 in the one end that is close to entry 3 between baffle subassembly 5 and the cell body 1 inside wall, form drilling fluid reflux zone 13 in the one end that is close to export 4 between baffle subassembly 5 and the cell body 1 inside wall, form between baffle subassembly 5 and the cell body 1 inside wall and supply drilling fluid through and the drilling fluid passageway 14 of intercommunication drilling fluid rectification district 6 and drilling fluid reflux zone 13, the position that corresponds with drilling fluid rectification district 6 on the cell body 1 is equipped with flow measurement appearance 7, be equipped with entry liquid level measurement appearance 10 and export liquid level measurement appearance 11 on the cell body 1 respectively, be equipped with on the entry 3 and be equipped with on the sample pipeline 8 rather than the entry 3, be equipped with sample liquid level measurement appearance 8 on the sample pipeline 8 that is close to entry 9, sample liquid measurement appearance 10 and the one end of cell body 1 inside sample fluid reflux zone 13, sample liquid measurement appearance 8. The drilling fluid measurement management system 2 comprises a control module 201, a data operation module 202, a data acquisition module 203, a data conversion module 204, a communication module 205, a data storage module 206 and a display screen 207, wherein the data acquisition module 203 is electrically connected with the flow measuring instrument 7, the inlet 3 liquid level measuring instrument, the outlet 4 liquid level measuring instrument and the sampling flowmeter 9 respectively, the data acquisition module 203 is electrically connected with the data operation module 202 through the data conversion module 204, and the data operation module 202, the communication module 205, the data storage module 206 and the display screen 207 are electrically connected with the control module 201 respectively. The position inside the tank body 1, which is close to the movable partition 502, is provided with a measuring area 15, and the flow measuring instrument 7 is arranged in the measuring area 15. The flow meter 7 comprises a transmitter 701 and two antennas 702 arranged below the transmitter 701, wherein one antenna 702 is internally provided with a guided wave radar sensor and a conductivity sensor negative electrode loop, the other antenna 702 is internally provided with a conductivity sensor and a radar sensor echo loop, and the antenna 702 and the guided wave radar sensor are respectively and electrically connected with the data acquisition module 203. In this embodiment, the sampling pipe 8 is provided with a cleaning port 17 which is communicated with the inside of the sampling flowmeter 9.

According to the drilling outlet flow monitoring and well control overflow leakage early warning system, abnormal data and fluids in different states are monitored, so that quick response can be realized when abnormal conditions (overflow or leakage) occur, erroneous judgment and false report can be prevented, liquid incoming signals can be accurately monitored when overflow occurs in the drilling stopping process, and abnormal signal feedback can be rapidly made; the measurement element and the drilling fluid measurement management system arranged in the system can be integrated into the existing logging system, and are linked with the drilling state and the pump path data, so that the early warning and linkage functions are realized; the flow measuring instrument adopts a top-loading structure, is convenient to install and maintain, can monitor various types of liquid flows, comprises single liquid, gas-liquid two-phase fluid and liquid-solid two-phase fluid, corrects the influence of the gas-liquid two-phase flow or the liquid-solid two-phase flow on the total flow by setting different influence coefficients, and improves the accuracy and stability of measurement; the flow measuring instrument, the sampling flowmeter, the inlet liquid level measuring instrument, the outlet liquid level measuring instrument and other sensors are highly integrated, so that the installation and use faults of the sensors are reduced, the accuracy and the reliability of data are improved, and data guarantee is provided for efficient, quick and accurate overflow leakage early warning and monitoring.

The method is matched with a drilling outlet flow monitoring and well control overflow and leakage early warning system, can be used for measuring drilling fluid and early warning overflow and leakage, and comprises a drilling outlet flow monitoring and well control overflow and leakage early warning method, and specifically comprises the following steps:

step 10, drilling fluid enters the tank body 1 and the sampling pipeline 8 from the inlet 3, the flow meter 7 measures the main flow, the conductivity and the solid phase content of the drilling fluid, the sampling flow meter 9 measures the sampling flow, the density, the temperature and the gas content of the drilling fluid, the inlet liquid level meter 10 and the outlet liquid level meter 11 respectively measure the drilling fluid levels of the inlet 3 and the outlet 4, if the drilling fluid is returned, the drilling fluid enters the step 20, if the drilling fluid is returned, the drilling fluid enters the step 30, if the drilling fluid is returned, the drilling fluid enters the step 40, if the solid phase content of the drilling fluid is returned, the drilling fluid enters the step 50, if the abnormal early warning is carried out, and the drilling fluid enters the step 60;

step 20, calculating the flow of the returned drilling fluid, wherein the calculation formula is as follows: qv1= (qv2+qv3) (1-x), wherein Qv1 is the return drilling fluid flow, qv2 is the main drilling fluid flow, qv3 is the drilling fluid sampling flow, and x is the solid phase content;

step 30, calculating the main flow of the returned drilling fluid, wherein the calculation formula is as follows: qv2=k (1.48/C) AR ^2/3 S ^1/2 Wherein Qv2 is the main flow of drilling fluid, C is the structural coefficient of the tank body 1, A is the cross-sectional area of a flow passage, R is the hydraulic radius, S is the fluid gradient, and K is the sectional correction coefficient of the actual flow calibration flow;

step 40, calculating the sampling flow of the returning drilling fluid, wherein the calculation formula is as follows: qv3=qm3/ρ, where qm3 is the sample flow and ρ is the density;

step 50, calculating the solid phase content of the returning drilling fluid, wherein the calculation formula is as follows: x=k1 (G1-G2) (G-G2) 100%, where x is the solid phase content, K1 is the correction database, G is the conductivity of the injection drilling fluid, G1 is the conductivity of the return drilling fluid, and G2 is the conductivity of the solid phase in the return drilling fluid;

wherein,l is the distance between two antennas, sigma is the conductivity of drilling fluid injected into the well, sigma 1 is the conductivity of drilling fluid returned from the well and detected by a flow meter, and sigma 2 is the solid phase conductivity;

step 60, if the well is in a drilling state, proceeding to step 70, if the well is in a drilling stop state, proceeding to step 80;

step 70, comparing the data collected by the flow measuring instrument 7, the inlet liquid level measuring instrument 10 and the outlet liquid level measuring instrument 11 with the drilling state and pump stroke data in the logging system in real time, when the main flow of the drilling fluid measured by the flow measuring instrument 7, the inlet liquid level of the tank body 1 measured by the inlet liquid level measuring instrument 10 and the outlet liquid level of the tank body 1 measured by the outlet liquid level measuring instrument 11 suddenly rise or fall, and the pump stroke data are exceeded to set the early warning fluctuation rate, determining whether the drilling is in the drilling state, if the drilling is in the drilling state and the pump stroke data are stable, and meanwhile, judging that the drilling has overflow or leakage risk if the drilling has no abnormal operation, and the drilling fluid measurement management system 2 makes corresponding abnormal prompt;

and step 80, comparing the data acquired by the sampling flowmeter 9 with the drilling state and pump stroke data in the logging system in real time, when the drilling fluid density or the drilling fluid flow acquired by the sampling flowmeter 9 suddenly rises or continuously rises, determining whether the drilling is in a drilling stop state, if the drilling is in a drilling stop state and the pump stroke data is 0, meanwhile, if the drilling is not in abnormal operation, judging that the drilling has overflow risks, and making corresponding abnormal prompts by the drilling fluid measurement management system, wherein when the drilling fluid density or the drilling fluid sampling flow acquired by the sampling flowmeter 9 continuously rises or is abnormal, the drilling fluid measurement management system 2 can perform overflow monitoring and early warning by combining the drilling fluid temperature, the inlet liquid level and the outlet liquid level.

When the drilling outlet mud measurement and overflow leakage early warning system works, drilling fluid enters the tank body 1 and the sampling pipeline 8 through the inlet 3. The drilling fluid entering the tank body 1 firstly enters the drilling fluid rectifying area 6, and the drilling fluid can smoothly flow in the drilling fluid rectifying area 6 because the drilling fluid rectifying area 6 in the tank body 1 is formed by the fixed partition plate 501 so as to be beneficial to the circulation of the drilling fluid according to a specific path. During this process, a substantial portion of the drilling fluid enters the drilling fluid recirculation zone 13 through the drilling fluid passage 14. A small part of drilling fluid is subjected to secondary rectification through a filtering rectifying hole 503 of the movable partition plate 502, large-particle rock debris interference is isolated under the action of the filtering rectifying hole 503, and then the main flow, the conductivity and the solid phase content of the drilling fluid are measured by a flow meter 7. To ensure a better measurement result, a separate measuring zone 15 may be provided for the measurement. After the measurement is completed, the drilling fluid re-enters the drilling fluid recirculation zone 13. During the circulation of drilling fluid, the inlet level gauge 10 and the outlet level gauge 11 measure the drilling fluid level at the inlet 3 and the outlet 4, respectively. The sampling flowmeter 9 arranged on the sampling pipeline 8 is used for measuring the sampling flow, density, temperature and gas content of the drilling fluid; the sampled drilling fluid after the measurement is further fed into the drilling fluid recirculation zone 13. Drilling fluid entering the drilling fluid recirculation zone 13 exits the tank 1 through the outlet 4. In order to prevent sand from settling, a guide plate 12 is arranged in the tank body 1, and the guide plate 12 is divided into a first guide section 1201 and a second guide section 1202; both the first flow guiding section 1201 and the second flow guiding section 1202 are inclined towards the outlet 4 so that the outlet 4 is the lowest point of the whole tank 1, thereby preventing sand settling.

The specific functions of the control module 201, the data operation module 202, the data acquisition module 203, the data conversion module 204, the communication module 205, the data storage module 206 and the display screen 207 of the drilling outlet flow monitoring and well control overflow leakage early warning system are as follows:

the control module 201: the neural center of the system realizes the functions of scheduling data functions of all modules, acquiring data at the site end, processing algorithm logic related to the system, calling a database and the like, and is interacted with the data communication of a remote logging system, so that the functions of drilling fluid measurement and accurate overflow and leakage early warning are finally realized;

the data operation module 202: the method is used for data deep processing and database learning, runs before matching with a control module and communicates with the control module to realize data internal interaction;

the data acquisition module 203: the system is communicated with a field end sensor, so that physical isolation between the acquisition end and the field end is realized, data acquisition, screening and filtering are carried out, and preparation work is carried out for data conversion;

the data conversion module 204: the data format conversion and the data interaction are carried out with the data acquisition module and the data operation module, so that the functions of going up and down are played;

the communication module 205: the method mainly provides data communication isolation and interaction functions for the digital communication sensor at the site end, and ensures the safety of the internal modules of the system;

the data storage module 206: all production operation parameters, early warning information and other event record information are stored, the power failure is stored for a long period, and the data black box provides backup data for a logging system, so that later review is facilitated;

display screen 207: the method is used for displaying the operation parameters, and inquiring, operating and modifying information such as operation curves, event records, setting parameters, system internal parameters and the like.

The cleaning port 17 is provided for cleaning the sampling flow meter 9 when the well is in a stopped state, so as to ensure the accuracy of measurement.

According to the drilling outlet flow monitoring and well control overflow leakage early warning system, a conductivity meter 18, a degasser 19 and a well cementation mud interface 20 can be arranged on the tank body 1 according to actual requirements so as to increase the functionality of the system.

The inlet 3 liquid level measuring instrument and the outlet 4 liquid level measuring instrument are non-invasive radio frequency radar liquid level meters. The sampling flowmeter 9 is a gas-liquid two-phase mass flowmeter.

In the measuring method described in the present application, in step 30, the flow channel is a drilling fluid channel 14 formed between the fixed partition 501 and the tank body 1; the hydraulic radius is the ratio of the wet circumference of the cross section of the flow channel to the cross section area; the fluid gradient is the ratio of the variation of the liquid level height of the flow channel to the length of the flow channel.

In step 50, the correction database is obtained through indoor and on-site data collection, arrangement and learning; the conductivity of drilling fluid injected into the well is a known technical parameter index in a logging system; the solid phase conductivity comprises rock debris and soil, a stable fluid conductivity monitoring area is arranged at the edge of the double antennae 702 of the flowmeter 7, the resistivity of a solid phase is far greater than that of drilling fluid aiming at water-based mud, so sigma 2 is far smaller than sigma 1, the approximate solid phase content can be directly measured, the rock debris component in the drilling fluid can be returned for testing and correcting, and as for oil-based mud, a small-range high-precision conductivity sensor is required to be configured and the solid phase component is accurately detected, so that the solid phase content is accurately detected.

In step 70, for more accurate abnormality pre-warning, the flow meter 7, the inlet level meter 10 and the outlet level meter 11 are designed in redundancy; when the drilling state is determined to be in drilling, pump stroke data are stable, if the monitored main flow, inlet liquid level and outlet liquid level parameters of the drilling liquid drop out of standard, judging that leakage risk exists; if the monitored main flow, inlet liquid level and liquid level parameters of the drilling fluid rise to exceed the standard, judging that overflow risks exist, and making a corresponding early warning prompt by the drilling fluid measurement management system 2; in the judging process, the current well drilling start-stop pump state change and the interference of the starting and stopping column on the measuring result are combined, so that accurate and rapid overflow abnormal early warning is realized, and false alarm and false judgment are avoided or reduced.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (5)

1. The utility model provides a well drilling export flow monitoring and well control overflow leak early warning system cell body subassembly, its characterized in that, includes the cell body, one of them one end of cell body is equipped with the entry with the inside intercommunication of cell body, the one end that the entry was kept away from to the cell body is equipped with the export with the inside intercommunication of cell body, be equipped with the baffle subassembly in the cell body, form drilling fluid rectification district in the one end that is close to the entry between baffle subassembly and the cell body inner wall, form drilling fluid reflux district in the one end that is close to the export between baffle subassembly and the cell body inner wall, form the drilling fluid passageway that can supply drilling fluid to pass through and communicate drilling fluid rectification district and drilling fluid reflux district between baffle subassembly and the cell body inner wall.

2. The well drilling outlet flow monitoring and well control overflow leakage early warning system groove body assembly according to claim 1, wherein the baffle plate assembly comprises a fixed baffle plate connected with the groove body and a movable baffle plate arranged on the fixed baffle plate, a well drilling liquid channel which is communicated with a well drilling liquid rectifying area and a well drilling liquid backflow area and can be used for fluid to pass through is formed between the fixed baffle plate and the inner side wall of the groove body, and a filtering rectifying hole which is communicated with the well drilling liquid rectifying area and the well drilling liquid backflow area is arranged on the movable baffle plate.

3. The well outlet flow monitoring and well control overflow and leakage warning system tank assembly according to claim 2, wherein the tank bottom is provided with a deflector inclined along the outlet direction.

4. A well outlet flow monitoring and well control overflow leakage warning system tank assembly as in claim 3 wherein the baffle comprises a first baffle segment disposed at one end of the well fluid rectifying section and a second baffle segment disposed in the well fluid return section, both the first and second baffle segments being inclined in the outlet direction.

5. The well outlet flow monitoring and well control overflow drain early warning system tank assembly of claim 4, wherein the tank is provided with an overflow prevention port on a side opposite to the inlet.