Drilling fluid slurry mixing interface detector
Through the drilling fluid slurry interface detector, the interface between the drilling fluid is detected by using the pH value and temperature difference, the pollution and equipment paralysis caused by the combination of drilling fluid and cement slurry is solved, and the effect of reducing drilling fluid costs and reducing equipment failures is achieved.
Patent Information
- Application Number
- CN202311208504.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-19
- Publication Date
- 2025-03-21
AI Technical Summary
In drilling projects, drilling fluid and cement slurry or other drilling fluid systems are combined with each other during the pump replacement process, resulting in drilling fluid pollution, resulting in excessive emissions, increased costs and paralysis of equipment.
It provides a drilling fluid slurry interface detector, including a PH value detection module, an optical coupling module and an acousto-optical alarm. By detecting the pH value and temperature difference of the drilling fluid, the interface between the two liquids can be quickly and accurately discovered, and the operation is adjusted in time to reduce the slurry emission.
It effectively reduces the volume of drilling fluid slurry, reduces the cost of drilling fluid, and reduces equipment paralysis and increase in drilling fluid costs caused by human error.
Smart Images
Figure CN119664325A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of oilfield drilling operations, and in particular relates to a drilling fluid slurry interface detector. Background Art
[0002] In the drilling project, due to the different formations and lithologies, different drilling fluid systems will be selected according to different structural zones to replace each other, to reduce the occurrence of complicated accidents downhole, and casing and cement will be used to seal the layers with different formation fluid pressures. This will cause the drilling fluid and cement slurry or (other system drilling fluids) to combine with each other, causing the drilling fluid to be contaminated, resulting in excessive drilling fluid discharge or increased use of drilling fluid treatment agents, resulting in increased drilling costs. In severe cases, the cement slurry will enter the circulation tank and solidify, causing equipment paralysis.
[0003] Drilling fluid systems are generally divided into freshwater drilling fluid, brine drilling fluid, oil-based drilling fluid and synthetic-based drilling fluid. In order to prevent collapse and reduce the complexity of the well, we match the drilling fluid system with the special lithology formation conversion. The operation steps are as follows: 1. Prepare drilling fluid of corresponding volume and performance in the drilling fluid circulation tank; 2. Use a drilling fluid pump to pump the prepared new system drilling fluid into the drill bit, replace the original drilling fluid from the wellhead through the drill bit, drill bit and annulus, and recover the original drilling fluid.
[0004] Cementing is one of the important links in the oil and gas well drilling process. Its main purpose is to isolate the oil, gas and water layers in the wellbore, protect the casing in the oil and gas well, increase the life of the oil and gas well and increase the oil and gas production. Operation steps 1. When cementing, use a cement truck to pump cement slurry into the casing or drilling tool, use a cement truck or drilling pump to pump the drilling fluid into the top, replace the cement slurry to the appropriate position, and circulate and replace the excess cement slurry for discharge and recycling.
[0005] Their common shortcomings and characteristics: Due to the different flow patterns of the drilling fluid, the new drilling fluid system and the original drilling fluid system or (cement slurry and drilling fluid) combine with each other during the pumping process to form a slurry, which pollutes the drilling fluid. The operator's vision and experience are not discovered in time, resulting in a large amount of drilling fluid pollution. If the slurry is discharged in advance, a large amount of mud will be discharged along with the cement slurry, causing certain economic losses, and also increasing the difficulty of waste liquid treatment in the later process, increasing the harm to the environment. The delayed discharge of the slurry causes a large amount of drilling fluid pollution in the circulation tank, and the cement slurry enters the circulation tank and solidifies, causing equipment paralysis.
[0006] Based on this, the present invention provides a drilling fluid slurry interface detector. Summary of the invention
[0007] In order to solve the above-mentioned problems in the prior art, that is, the prior art relies on the operator's vision and experience to find out in time, resulting in a large amount of drilling fluid pollution. If the mixed slurry is discharged in advance, a large amount of mud will be discharged together with the cement slurry, causing certain economic losses, and also increasing the difficulty of waste liquid treatment in the later process, increasing the harm to the environment. The delayed discharge of the mixed slurry causes a large amount of drilling fluid pollution in the circulation tank, and the cement slurry enters the circulation tank and solidifies, causing the equipment to be paralyzed. The present invention provides a drilling fluid mixed slurry interface detector.
[0008] The present invention provides a drilling fluid slurry interface detector, which includes a pH value detection module, an optical coupling module, and an audible and visual alarm;
[0009] The pH value detection module is used to obtain the pH value of the drilling fluid, and when the pH value exceeds a preset pH alarm value, transmits a pH alarm signal corresponding to the preset pH alarm value to the optical coupling module;
[0010] The optical coupling module transmits the alarm electrical signal to the sound and light alarm based on the PH alarm signal;
[0011] The sound and light alarm is used to prompt the user to check the drilling fluid condition when receiving the alarm electrical signal.
[0012] In some preferred embodiments, the detector further includes a charge and discharge management module and a battery module;
[0013] The battery module is used to provide an initial current and transmit it to the charge and discharge management module. The charge and discharge management module generates a stable working current based on the initial current and transmits it to the pH value detection module, the optical coupling module and the sound and light alarm;
[0014] The battery module includes a first wire and a second wire, wherein the first wire is connected to a first contact of the charge and discharge management module, and the second wire is connected to a second contact of the charge and discharge management module.
[0015] In some preferred embodiments, the third contact of the charge and discharge management module is connected to the third contact of the optical coupling module, the fourth contact of the charge and discharge management module is connected to the first contact of the optical coupling module, the wire connecting the third contact of the charge and discharge management module and the third contact of the optical coupling module is connected to the input end of the sound and light alarm, and the input end of the sound and light alarm is also connected to the second contact of the optical coupling module;
[0016] The wire connecting the third contact of the charge and discharge management module and the third contact of the optical coupling module is connected to the 5V pin of the pH value detection module, and the wire connecting the fourth contact of the charge and discharge management module and the first contact of the optical coupling module is connected to the GND pin of the pH value detection module;
[0017] The fourth contact of the optical coupling module is connected to the first contact of the pH value detection module, and the fifth contact of the optical coupling module is connected to the second contact of the pH value detection module.
[0018] In some preferred implementations, the pH value detection module, the charge and discharge management module, the optical coupling module, the sound and light alarm, and the battery module are all installed in an explosion-proof box.
[0019] In some preferred embodiments, the pH value detection module further includes a first interface, the first interface is connected to a temperature sensor, and the temperature sensor is used to measure the temperature of the drilling fluid.
[0020] In some preferred embodiments, a processing chip is installed inside the pH value detection module, and the processing chip calculates the pH value of the drilling fluid according to the voltage value of the drilling fluid.
[0021] In some preferred embodiments, the pH value detection module further includes a BNC interface, and the BNC interface is connected to a sensor module. The sensor module causes the electrode to generate different potentials according to drilling fluids with different pH values, thereby obtaining a voltage value of the drilling fluid.
[0022] In some preferred embodiments, the sound and light alarm is used to output a 3.3V alarm signal.
[0023] Beneficial effects of the present invention: The present invention is mainly applicable to the cementing of the first well, technical casing cementing and completion cementing of drilling operations. It is used when converting the drilling fluid system or other liquid conversions. The device can quickly and accurately find the interface of the two liquids through the pH value and the temperature difference of the two liquids, and allows the operator to make corresponding adjustments in time, which can effectively reduce the volume of the discharged drilling fluid slurry, reduce the cost of drilling fluid, and reduce the paralysis of equipment and the increase of drilling fluid cost caused by human errors in work. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0025] Figure 1 It is a schematic diagram of the connection of various modules of a drilling fluid slurry interface detector of the present invention;
[0026] Figure 2 It is a schematic diagram of a pH value detection module of a drilling fluid slurry interface detector of the present invention;
[0027] Figure 3 It is a schematic diagram of the connection between a pH value detection module and a USB conversion module of a drilling fluid slurry interface detector of the present invention;
[0028] Figure 4 The present invention is a schematic diagram of the relationship between the potential and pH value of a drilling fluid slurry interface detector. DETAILED DESCRIPTION
[0029] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.
[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0031] like Figure 1-4 As shown, the present invention provides a drilling fluid slurry interface detector, which includes a pH value detection module 1, an optical coupling module 3, and an audible and visual alarm 4;
[0032] The pH value detection module 1 is used to obtain the pH value of the drilling fluid. When the pH value exceeds a preset pH alarm value, a pH alarm signal corresponding to the preset pH alarm value is transmitted to the optical coupling module 3;
[0033] The optical coupling module 3 transmits the alarm electrical signal to the sound and light alarm 4 based on the PH alarm signal;
[0034] The sound and light alarm 4 is used to prompt the user to check the drilling fluid condition when receiving the alarm electrical signal.
[0035] Preferably, see Figure 1 , 2 , the detector also includes a charge and discharge management module 2 and a battery module 5;
[0036] The battery module 5 is used to provide an initial current and transmit it to the charge and discharge management module 2. The charge and discharge management module 2 generates a stable working current based on the initial current and transmits it to the pH value detection module 1, the optical coupling module 3 and the sound and light alarm 4.
[0037] The battery module 5 includes a first wire 51 and a second wire 52 . The first wire 51 is connected to the first contact 21 of the charge and discharge management module 2 , and the second wire 52 is connected to the second contact 22 of the charge and discharge management module 2 .
[0038] Preferably, see Figure 1 , the third contact 23 of the charge and discharge management module 2 is connected to the third contact 33 of the optical coupling module 3, the fourth contact 24 of the charge and discharge management module 2 is connected to the first contact 31 of the optical coupling module 3, the wire connecting the third contact 23 of the charge and discharge management module 2 and the third contact 33 of the optical coupling module 3 is connected to the input end of the sound and light alarm 4, and the input end of the sound and light alarm 4 is also connected to the second contact 32 of the optical coupling module 3;
[0039] The wire connecting the third contact 23 of the charge and discharge management module 2 and the third contact 33 of the optical coupling module 3 is connected to the 5V pin of the pH value detection module 1, and the wire connecting the fourth contact 24 of the charge and discharge management module 2 and the first contact 31 of the optical coupling module 3 is connected to the GND pin of the pH value detection module 1;
[0040] The fourth contact 34 of the optical coupling module 3 is connected to the first contact 11 of the pH value detection module 1 , and the fifth contact 35 of the optical coupling module 3 is connected to the second contact 12 of the pH value detection module 1 .
[0041] Among them, see Figure 3 , the PH value detection module 1 can also be connected to a USB conversion TTL module, the PH value detection module 1 also includes an RX pin and a TX pin, and the USB conversion TTL module includes a 5V pin, a TXD pin, a RXD pin and a GND pin;
[0042] The GND pin of the PH value detection module 1 is connected to the GND pin of the USB conversion TTL module, the RX pin of the PH value detection module 1 is connected to the RXD pin of the USB conversion TTL module, the TX pin of the PH value detection module 1 is connected to the TXD pin of the USB conversion TTL module, and the 5V pin of the PH value detection module 1 is connected to the 5V pin of the USB conversion TTL module.
[0043] The USB to TTL conversion module in the present invention is a CH340G communication module, and the CH340G communication module is connected to a host computer to calibrate the pH value detection module 1 and set an alarm value.
[0044] Preferably, see Figure 1The pH value detection module 1, the charge and discharge management module 2, the optical coupling module 3, the sound and light alarm 4 and the battery module 5 are all installed in an explosion-proof box.
[0045] Preferably, see Figure 1 , Figure 2 The pH value detection module 1 also includes a first interface 13, and the first interface 13 is connected to a temperature sensor, and the temperature sensor is used to measure the temperature of the drilling fluid.
[0046] The temperature sensor described in the present invention is a DS18B20 temperature sensor, which can provide the current temperature and calibrate the pH value of the same liquid at different temperatures through a serial port to make the pH value more accurate.
[0047] See also Figure 1 , set the PH alarm value to alarm when it is higher or lower than the set value, when the processor detects that the voltage value of the electrode reaches the alarm value, it will output a 3.3V alarm signal at the alarm output interface, connect the alarm signal to the input end of the optical coupling module 3, the optical coupling module 3 is turned on, and the sound and light alarm 4 alarms. Add the battery module 5 and the battery box of the battery module 5, and encapsulate them in an explosion-proof box to meet the explosion-proof requirements of the well site.
[0048] Preferably, see Figure 1 , Figure 2 , Figure 4 The pH value detection module 1 also includes a BNC interface 14, which is connected to a sensor module. The sensor module causes the electrode to generate different potentials according to the drilling fluid with different pH values, thereby obtaining the voltage value of the drilling fluid.
[0049] Preferably, see Figure 1 , Figure 2 , Figure 4 A processing chip is installed inside the pH value detection module 1, and the processing chip calculates the pH value of the drilling fluid according to the voltage value of the drilling fluid.
[0050] The chip used in the present invention is the STM8S103F3P6 processing chip.
[0051] Preferably, the sound and light alarm 4 is used to output a 3.3V alarm signal.
[0052] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.
[0053] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.
[0054] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A drilling fluid slurry interface detector, characterized in that: The detector comprises a pH value detection module (1), an optical coupling module (3), and an audible and visual alarm (4); The pH value detection module (1) is used to obtain the pH value of the drilling fluid, and when the pH value exceeds a preset pH alarm value, a pH alarm signal corresponding to the preset pH alarm value is transmitted to the optical coupling module (3); The optical coupling module (3) transmits the alarm electrical signal to the sound and light alarm (4) based on the PH alarm signal; The sound and light alarm (4) is used to prompt the user to check the drilling fluid condition when receiving the alarm electrical signal.
2. A drilling fluid slurry interface detector according to claim 1, characterized in that: The detector also includes a charge and discharge management module (2) and a battery module (5); The battery module (5) is used to provide an initial current and transmit it to the charge and discharge management module (2); the charge and discharge management module (2) generates a stable working current based on the initial current and transmits it to the pH value detection module (1), the optical coupling module (3) and the sound and light alarm (4); The battery module (5) comprises a first wire (51) and a second wire (52), wherein the first wire (51) is connected to a first contact (21) of the charge and discharge management module (2), and the second wire (52) is connected to a second contact (22) of the charge and discharge management module (2).
3. A drilling fluid slurry interface detector according to claim 2, characterized in that: The third contact (23) of the charge and discharge management module (2) is connected to the third contact (33) of the optical coupling module (3), the fourth contact (24) of the charge and discharge management module (2) is connected to the first contact (31) of the optical coupling module (3), the wire connecting the third contact (23) of the charge and discharge management module (2) and the third contact (33) of the optical coupling module (3) is connected to the input end of the sound and light alarm (4), and the input end of the sound and light alarm (4) is also connected to the second contact (32) of the optical coupling module (3); The wire connecting the third contact (23) of the charge and discharge management module (2) and the third contact (33) of the optical coupling module (3) is connected to the 5V pin of the pH value detection module (1), and the wire connecting the fourth contact (24) of the charge and discharge management module (2) and the first contact (31) of the optical coupling module (3) is connected to the GND pin of the pH value detection module (1); The fourth contact (34) of the optical coupling module (3) is connected to the first contact (11) of the pH value detection module (1), and the fifth contact (35) of the optical coupling module (3) is connected to the second contact (12) of the pH value detection module (1).
4. A drilling fluid slurry interface detector according to claim 3, characterized in that: The pH value detection module (1), the charge and discharge management module (2), the optical coupling module (3), the sound and light alarm (4) and the battery module (5) are all installed in an explosion-proof box.
5. A drilling fluid slurry interface detector according to claim 4, characterized in that: The pH value detection module (1) further comprises a first interface (13), wherein the first interface (13) is connected to a temperature sensor, and the temperature sensor is used to measure the temperature of the drilling fluid.
6. A drilling fluid slurry interface detector according to claim 5, characterized in that: A processing chip is installed inside the pH value detection module (1), and the processing chip calculates the pH value of the drilling fluid according to the voltage value of the drilling fluid.
7. A drilling fluid slurry interface detector according to claim 6, characterized in that: The pH value detection module (1) further comprises a BNC interface (14), wherein the BNC interface (14) is connected to a sensor module, and the sensor module causes the electrode to generate different potentials according to drilling fluids with different pH values, thereby obtaining a voltage value of the drilling fluid.
8. The drilling fluid slurry interface detector according to claim 7, characterized in that: The sound and light alarm (4) is used to output a 3.3V alarm signal.