Portable anti-overflow and anti-sand setting type overflow well leakage monitoring buffer device and monitoring method
By designing portable anti -overflow and anti -sinking sandyflow wells leak monitoring buffers, the height of the liquid surface monitoring mechanism and floating mechanism monitor the liquid surface, judge the well leakage or overflow, and cooperate with the floating mechanism through the activity board to maintain the liquid surface with the floating mechanism to maintain the liquid surface Stability solves the problem of timely monitoring and recording overflow and well leakage during the existing technology, reducing the risk of well control and extending the service life of the equipment.
Patent Information
- Application Number
- CN202310895755.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-20
- Publication Date
- 2025-01-21
AI Technical Summary
In petroleum exploration and development, the existing technology lacks effective overflow and well leakage monitoring methods, which leads to inability to monitor and record in time during unrecorded wells, increasing the risk of well control; at the same time, the buffer tank lacks buffering and anti-sanding functions, resulting in sensors and equipment damage, shortened service life.
It is designed with a portable anti -overflow, anti -sinking sandytic wells leak monitoring buffer, including the main body, bottom plate, activity board, floating mechanism, liquid monitoring agency, and weak fluid monitoring units. The device cooperates with the floating mechanism through the liquid surface monitoring mechanism to monitor the height of the liquid surface, judge the leakage or overflow, and cooperate with the activity board with the floating mechanism to maintain the liquid surface stable to meet the monitoring conditions of the sensor and related equipment.
Effectively solve the problem of unable to monitor and recording overflow and well leakage during the period of unsecured wells, and reduce the risk of well control. At the same time, it provides a buffer and anti -sinking sand function, extend the service life of sensors and equipment, ensures the equipment of the equipment, and ensures the equipment of the equipment. Stable operation.
Smart Images
Figure CN119333070A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of overflow well leakage monitoring, and is a portable overflow well leakage monitoring buffer device and a monitoring method that prevents overflow and sand settling. Background Art
[0002] During oil exploration and development, formation fluids return to the surface from the bottom of the well along with the drilling fluid. Sensors installed in the buffer tank, such as degassers, drilling fluid parameter detection, and outlet flow monitoring, monitor and collect relevant parameters in real time. These parameters are then used to analyze engineering anomalies such as overflows and lost circulation, as well as oil and gas indications. These sensors and equipment have high requirements for installation, operating conditions, and the environment. Currently, five major problems exist at drilling sites: First, some drilling teams lack buffer tanks, making it difficult to install various sensors and related equipment. Second, some drilling operations do not meet the buffer tank standards, resulting in the failure of installed sensors and related equipment to operate normally. Third, buffer tanks lack a buffering function, causing significant damage to sensors and related equipment due to drilling fluid impact, shortening their service life. Fourth, buffer tanks lack a sand-settling function, allowing large amounts of rock cuttings and other solid matter to settle at the bottom of the buffer tank, burying sensors and related equipment and causing them to malfunction. Fifth, during periods when logging is not ongoing, overflows and lost circulation are not monitored and recorded, requiring manual observation of the outlet or drilling fluid volume, leading to delayed detection and increased well control risks. In either case, there are risks such as distortion or loss of drilling parameters, increased well control risks, and failure to detect engineering anomalies in a timely manner. Summary of the Invention
[0003] The present invention provides a portable overflow and anti-sand settling overflow well leakage monitoring buffer device and monitoring method, which overcomes the shortcomings of the above-mentioned existing technologies. It can effectively solve the problem of well control risks caused by the lack of timely monitoring and recording of overflow and well leakage functions during the non-logging period, and the problem of the lack of buffering and anti-sand settling functions in the existing buffer tank.
[0004] One of the technical solutions of the present invention is achieved through the following measures: the portable anti-overflow and anti-sand sedimentation overflow well leakage monitoring and buffer device includes a main body, a bottom plate, a movable plate, a floating mechanism, a liquid level monitoring mechanism and a weak fluid monitoring unit. The main body is in the shape of a U.S. character. A drilling fluid inlet that passes through the inside and outside is provided on the right side of the main body. A weak fluid monitoring unit is provided on the right side plate of the main body corresponding to the position below the drilling fluid inlet. A bottom plate is provided at the bottom of the main body. There is a gap between the bottom plate and the left side plate of the main body. The movable plate is located at the gap and can seal the gap. A floating mechanism that can drive the movable plate to move up and down is installed on the upper side of the movable plate. The left end of the floating mechanism is connected to a liquid level monitoring mechanism that cooperates with it to measure liquid level changes.
[0005] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned floating mechanism may include a float, a magnetic block, a V-shaped movable rod and a connecting rod. The V-shaped movable rod opens to the right, and the middle part of the V-shaped movable rod is hinged to the inner side of the left side plate of the main body. A float is installed on the lower side of the upper right end of the V-shaped movable rod, and a magnetic block is installed on the left end of the V-shaped movable rod. The liquid level monitoring mechanism includes a number of reed switches and an integrated circuit. The number of reed switches are arranged around the movement trajectory of the magnetic block. The contact between the reed switch and the magnetic block can form a loop between the reed switch and the integrated circuit. A connecting rod is hinged at the lower right end of the V-shaped movable rod, and the lower end of the connecting rod is hinged to the upper side of the movable plate.
[0006] The floating ball can be oval in shape and in a horizontal position.
[0007] The above-mentioned structure may further include a buffer plate, which is a louver-shaped buffer plate. The buffer plate is located on the inner side of the right portion of the main body and is installed together with the front side plate and the rear side plate of the main body.
[0008] The bottom plate can be tilted in a shape of being lower on the left and higher on the right, and the right end of the movable plate and the upper side of the left part of the bottom plate are sealed with an inclined surface.
[0009] The above-mentioned weak fluid monitoring unit may be a proximity sensor.
[0010] The second technical solution of the present invention is achieved through the following measures: the monitoring method is carried out according to the following method, the drilling fluid inlet of the portable anti-overflow and anti-sand overflow well leakage monitoring buffer device is connected to the drilling fluid outlet conduit, and the liquid level monitoring mechanism and the weak fluid monitoring unit are respectively connected to the logging instrument; when drilling or stopping the circulation, there is no drilling fluid at the outlet or the drilling fluid outflow is small, and the weak fluid monitoring unit is used to monitor in real time whether there is drilling fluid flowing into the drilling fluid inlet of the device body. Except for the outflow of drilling fluid during the lowering of the drill bit, the outflow of drilling fluid in other states is determined to be overflow, and the drilling fluid does not flow out during the lowering of the drill bit. , it is determined to be lost circulation; during normal circulation, the weak fluid monitoring unit stops working, and the liquid level monitoring mechanism starts working. The drilling fluid first fills the inside of the main body. When the drilling fluid reaches the standard height, the floating mechanism drives the movable plate to rise under the action of buoyancy, and the drilling fluid flows out from the bottom, thereby maintaining the liquid level height to meet the stable operation of the sensor and related equipment. After the drilling fluid displacement is stable, when the drilling fluid displacement at the drilling fluid inlet increases or decreases, the liquid level in the main body rises or falls. The liquid level monitoring mechanism transmits the liquid level signal to the logging instrument according to the up and down movement of the floating mechanism. If the liquid level rises, it is determined to be overflow, and if the liquid level drops, it is determined to be lost circulation.
[0011] The present invention has a reasonable and compact structure and is easy to use. It monitors the liquid level height in the main body through the cooperation of the liquid level monitoring mechanism and the floating mechanism, thereby monitoring the drilling fluid discharge volume and judging well leakage or overflow. By setting a movable plate in cooperation with the floating mechanism, it can monitor the drilling fluid discharge situation while discharging the drilling fluid, keep the liquid level stable, and meet the monitoring conditions of sensors and related equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Attachment Figure 1 This is a schematic diagram of the main structure of Example 1 of the present invention.
[0013] Attachment Figure 2 For attachment Figure 1 Schematic diagram of the three-dimensional structure.
[0014] Attachment Figure 3 This is a schematic diagram of the internal three-dimensional structure of the main body.
[0015] Attachment Figure 4 It is a schematic diagram of the main structure of the liquid level monitoring mechanism.
[0016] The codes in the accompanying drawings are: 1 is the main body, 2 is the bottom plate, 3 is the movable plate, 4 is the liquid level monitoring mechanism, 5 is the weak fluid monitoring unit, 6 is the float, 7 is the magnetic block, 8 is the V-shaped movable rod, 9 is the connecting rod, 10 is the drilling fluid inlet, 11 is the buffer plate, and 12 is the reed switch. DETAILED DESCRIPTION
[0017] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.
[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.
[0019] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: As shown in the attached Figure 1 、 2 As shown in Figures 3 and 4, the portable anti-overflow and anti-sand sedimentation overflow well leakage monitoring and buffering device includes a main body 1, a bottom plate 2, a movable plate 3, a floating mechanism, a liquid level monitoring mechanism 4 and a weak fluid monitoring unit 5. The main body 1 is in the shape of a U.S. character. A drilling fluid inlet 10 that passes through the inside and outside is provided on the right side of the main body 1. A weak fluid monitoring unit 5 is provided on the right side plate of the main body 1 corresponding to the position below the drilling fluid inlet 10. A bottom plate 2 is provided at the bottom of the main body 1. There is a gap between the bottom plate 2 and the left side plate of the main body 1. The movable plate 3 is located at the gap and can seal the gap. A floating mechanism that can drive the movable plate 3 to move up and down is installed on the upper side of the movable plate 3. The left end of the floating mechanism is connected to a liquid level monitoring mechanism 4 that cooperates with it to measure liquid level changes.
[0020] During use, various sensors and related equipment can be set in the main body 1. When the drilling fluid flows into the main body 1 and reaches a certain height, the buoyancy mechanism drives the movable plate 3 to move upward to open the gap to allow the drilling fluid to flow out. The inflow and outflow of the drilling fluid reaches a balance, and the liquid level meets the monitoring conditions of various sensors and related equipment. After the liquid level stabilizes, when the drilling fluid suddenly increases or decreases, the floating mechanism moves up and down, triggering the liquid level monitoring mechanism 4 to monitor the liquid level fluctuation and judge overflow or well leakage; when drilling or stopping the circulation, there is no drilling fluid at the outlet or the drilling fluid outflow is small, and the weak fluid monitoring unit 5 is used to monitor in real time whether there is drilling fluid flowing into the drilling fluid inlet 10 of the device main body 1. Except for the outflow of drilling fluid during the lowering of the drill bit, the outflow of drilling fluid in other states is judged as overflow. If the drilling fluid does not flow out during the lowering of the drill bit, it is judged as well leakage.
[0021] The portable overflow prevention and sand settling prevention overflow well leakage monitoring and buffering device can be further optimized and / or improved according to actual needs: As attached Figure 1 、 2 As shown in Figures 3 and 4, the floating mechanism includes a float 6, a magnetic block 7, a V-shaped movable rod 8 and a connecting rod 9. The V-shaped movable rod 8 opens to the right, and the middle part of the V-shaped movable rod 8 is hinged to the inner side of the left side plate of the main body 1. The float 6 is installed on the lower side of the upper right end of the V-shaped movable rod 8, and the magnetic block 7 is installed on the left end of the V-shaped movable rod 8. The liquid level monitoring mechanism 4 includes a number of reed switches 12 and an integrated circuit. The number of reed switches 12 are arranged around the movement trajectory of the magnetic block 7. The contact between the reed switch 12 and the magnetic block 7 can form a loop between the reed switch 12 and the integrated circuit. The connecting rod 9 is hinged to the lower right end of the V-shaped movable rod 8, and the lower end of the connecting rod 9 is hinged to the upper side of the movable plate 3.
[0022] The reed switch 12 has two overlapping, magnetized reed blades at their endpoints, sealed within a glass tube, separated by only a few microns. The tube is filled with a high-purity inert gas. Before operation, the two reed blades are not in contact. An external magnetic field creates different polarities near the reed's endpoints, attracting each other and closing the two reed blades. As the float 6 rises and falls, driving the V-shaped movable rod 8 counterclockwise and clockwise, the magnet 7 contacts the reed switch 12 at different positions. The integrated circuit (IC) monitors the high-frequency current generated by the closure of the reed switch 12, generating a resistor. This resistance, increasing from small to large, corresponds to the reed switch 12's movement from top to bottom. The IC's built-in program converts this resistance into a 4-20mA signal, which is then output to other devices. Different resistance levels correspond to different liquid levels. The reed switch 12 and the IC are cured using a potting compound, ensuring both liquid level monitoring and waterproofing.
[0023] As attached Figure 1 、 2 As shown in Figures 3 and 4, the float 6 is oval in shape and lies flat.
[0024] The elliptical shape of the float 6 can increase the buoyancy and reduce the overall height, and the float 6 is installed on the lower side of the upper right end of the V-shaped movable rod 8, which can protect the float 6 and is not easy to be accidentally touched and damaged.
[0025] As attached Figure 1 、 2 As shown in FIG. 3 , the main body 1 further includes a buffer plate 11 , which is a louver-shaped buffer plate 11 . The buffer plate 11 is located on the inner side of the right portion of the main body 1 and is installed together with the front side plate and the rear side plate of the main body 1 .
[0026] By setting up a louver-shaped buffer plate 11, the drilling fluid speed entering the main body 1 from the drilling fluid inlet 10 can be reduced, the liquid level fluctuation can be kept small, the parameters monitored by the liquid level monitoring unit can be more accurate, and large pieces of debris can be prevented from falling directly onto the sensors and related equipment in the main body 1, thereby protecting the sensors and equipment.
[0027] As attached Figure 1 、 2 As shown in Figures 3 and 4, the bottom plate 2 is inclined with the left side lower and the right side higher, and the right end of the movable plate 3 and the upper side of the left part of the bottom plate 2 are sealed with an inclined surface.
[0028] The inclined bottom plate 2 can make the sediment automatically slide toward the gap. When the movable plate 3 rises to open the gap, the sediment can flow out directly along the bottom plate 2, avoiding the problem of inaccurate detection and damage to sensors and equipment caused by sediment accumulation.
[0029] As attached Figure 1 、 2 As shown in FIG3 , the weak fluid monitoring unit 5 is a proximity sensor.
[0030] The electrostatic capacitance type proximity sensor detects the presence of non-metallic objects. It monitors whether there is fluid flow through the proximity sensor, thereby monitoring overflow or well leakage when drilling or stopping circulation.
[0031] Example 2: As shown in the attached Figure 1 、 2As shown in Figures 3 and 4, the monitoring method is carried out in accordance with the following method: the drilling fluid inlet 10 of the portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device is connected to the drilling fluid outlet conduit, and the liquid level monitoring mechanism 4 and the weak fluid monitoring unit 5 are respectively connected to the logging instrument; when drilling or stopping the circulation, there is no drilling fluid at the outlet or the drilling fluid outflow is small, and the weak fluid monitoring unit 5 is used to monitor in real time whether there is drilling fluid flowing into the drilling fluid inlet 10 of the device body 1. Except for the outflow of drilling fluid during the lowering of the drill bit, the outflow of drilling fluid in other states is determined to be overflow, and the drilling fluid does not flow out during the lowering of the drill bit, which is determined to be well leakage; During normal circulation, the weak fluid monitoring unit 5 stops working and the liquid level monitoring mechanism 4 starts working. The drilling fluid first fills the inside of the main body 1. When the drilling fluid reaches the standard height, the floating mechanism drives the movable plate 3 to rise under the action of buoyancy, and the drilling fluid flows out from the bottom, thereby maintaining the liquid level height to meet the stable operation of the sensor and related equipment. After the drilling fluid displacement is stable, when the drilling fluid displacement at the drilling fluid inlet 10 increases or decreases, the liquid level in the main body 1 rises or falls. The liquid level monitoring mechanism 4 transmits the liquid level signal to the logging instrument according to the up and down movement of the floating mechanism. A rising liquid level is determined as overflow, and a falling liquid level is determined as well leakage.
[0032] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.
Claims
1. A portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device, characterized in that It includes a main body, a bottom plate, a movable plate, a floating mechanism, a liquid level monitoring mechanism and a weak fluid monitoring unit. The main body is in the shape of a U.S. character. A drilling fluid inlet that passes through the inside and outside is arranged on the right side of the main body. A weak fluid monitoring unit is arranged on the right side plate of the main body corresponding to the position below the drilling fluid inlet. A bottom plate is arranged at the bottom of the main body. There is a gap between the bottom plate and the left side plate of the main body. The movable plate is located at the gap and can seal the gap. A floating mechanism that can drive the movable plate to move up and down is installed on the upper side of the movable plate. The left end of the floating mechanism is connected to a liquid level monitoring mechanism that cooperates with it to measure liquid level changes.
2. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 1 is characterized in that The floating mechanism includes a float, a magnetic block, a V-shaped movable rod and a connecting rod. The V-shaped movable rod opens to the right, the middle part of the V-shaped movable rod is hinged to the inner side of the left side plate of the main body, a float is installed on the lower side of the upper right end of the V-shaped movable rod, and a magnetic block is installed on the left end of the V-shaped movable rod. The liquid level monitoring mechanism includes a plurality of reed switches and an integrated circuit. The plurality of reed switches are arranged around the movement trajectory of the magnetic block. The contact between the reed switch and the magnetic block can form a loop between the reed switch and the integrated circuit. A connecting rod is hinged on the lower right end of the V-shaped movable rod, and the lower end of the connecting rod is hinged to the upper side of the movable plate.
3. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 2 is characterized in that The float is oval in shape and lies flat.
4. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 1, 2 or 3, characterized in that It also includes a buffer plate, which is a louver-shaped buffer plate. The buffer plate is located at the inner side of the right part of the main body and is installed together with the front side plate and the rear side plate of the main body.
5. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 1, 2 or 3, characterized in that The bottom plate is inclined in a shape of being lower on the left and higher on the right, and the right end of the movable plate and the upper side of the left part of the bottom plate are sealed with an inclined surface.
6. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 4 is characterized in that The bottom plate is inclined in a shape of being lower on the left and higher on the right, and the right end of the movable plate and the upper side of the left part of the bottom plate are sealed with an inclined surface.
7. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 1, 2, 3 or 6, characterized in that The weak fluid monitoring unit is a proximity sensor.
8. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 4 is characterized in that The weak fluid monitoring unit is a proximity sensor.
9. The portable anti-overflow and anti-sanding overflow well leakage monitoring buffer device according to claim 5 is characterized in that The weak fluid monitoring unit is a proximity sensor.
10. A monitoring method using the portable overflow and anti-sanding overflow well leakage monitoring buffer device as described in any one of claims 1 to 9, characterized in that The following method is used to connect the drilling fluid inlet of the portable overflow and sand-proof overflow well leakage monitoring buffer device to the drilling fluid outlet conduit, and the liquid level monitoring mechanism and the weak fluid monitoring unit are respectively connected to the logging instrument; when the drill is lifted or the circulation is stopped, there is no drilling fluid at the outlet or the drilling fluid outflow is small, and the weak fluid monitoring unit is used to monitor in real time whether there is drilling fluid flowing into the drilling fluid inlet of the device body. Except for the outflow of drilling fluid during the lowering of the drill bit, the outflow of drilling fluid in other states is determined as overflow, and the drilling fluid does not flow out during the lowering of the drill bit, which is determined as well leakage; during normal circulation, The weak fluid monitoring unit stops working and the liquid level monitoring mechanism starts working. The drilling fluid first fills the inside of the main body. When the drilling fluid reaches the standard height, the floating mechanism drives the movable plate to rise under the action of buoyancy, and the drilling fluid flows out from the bottom, thereby maintaining the liquid level height to meet the stable operation of the sensor and related equipment. After the drilling fluid displacement is stable, when the drilling fluid displacement at the drilling fluid inlet increases or decreases, the liquid level in the main body rises or decreases. The liquid level monitoring mechanism transmits the liquid level signal to the logging instrument according to the up and down movement of the floating mechanism. A rising liquid level is judged as overflow, and a falling liquid level is judged as well leakage.