Cleaning device and method

Abstract

The invention discloses a cleaning device and method, and the cleaning device comprises a cleaning main body which is internally provided with a cavity; the ultrasonic assembly is installed outside the cleaning body and used for emitting ultrasonic waves into the cleaning body; the bubble generator is mounted in the cavity and used for providing bubbles; the heating assembly is used for heating liquid in the cavity; the liquid inlet, the liquid circulating outlet, the rock debris sample inlet and the sand discharge port are all mounted on the cleaning main body and are communicated with the cavity; the stock solution outlet is provided with a stock solution electromagnetic valve, the sand discharge port is provided with a sand discharge electromagnetic valve, and the liquid inlet can be communicated with one of a synthetic base stock solution pipeline, a cleaning agent pipeline or a liquid circulation outlet of the drilling system; and the controller is connected with the ultrasonic assembly, the bubble generator, the stock solution electromagnetic valve and the sand discharging electromagnetic valve. According to the cleaning device provided by the invention, the automation level of cleaning the synthetic base logging rock debris is greatly improved, and a foundation is laid for realizing rock debris identification and stratum evaluation.

Description

Technical Field

[0001] The present invention relates to the field of drilling engineering, and particularly to a cleaning device and method. Background Art

[0002] Cutting logging is an important service item in geological logging and an important basis for discovering and evaluating oil and gas layers. In recent years, special drillings such as highly deviated wells, horizontal wells, shale oil and gas have been increasingly widely used, and synthetic-based drilling fluids have been widely used during the drilling process. A synthetic-based drilling fluid is a drilling fluid system in which the liquid in the drilling fluid is mainly composed of petroleum and its derivatives. Compared with water-based drilling fluids, it has various advantages such as high temperature resistance, salt invasion resistance, beneficial to wellbore stability, good lubricity, beneficial to rapid drilling, and less damage to oil and gas layers.

[0003] While synthetic-based drilling fluids have advantages, they also have an adverse impact on logging work. To meet the needs of different drilling conditions and geological conditions, the formulation of synthetic-based drilling fluids is usually relatively complex, usually mainly oil-based, and a large number of chemical drugs such as emulsifiers, lime, organic clay, fluid loss additives, wetting agents, weighting agents, etc. are added. Under the adsorption effect of the synthetic-based oil film and the surface tension, an oil film will adhere to the outer surface of the cuttings, and the oil content rate is as high as more than 20%, making it extremely difficult to clean the synthetic-based logging cuttings. The on-site logging cutting particles are mainly distributed between 1 mm and 15 mm, and the required sampling weight of the cuttings is about 500 g.

[0004] In the prior art, for the cleaning of synthetic-based logging cuttings, manual cleaning is mainly adopted, which has a long cleaning time and poor cleaning effect, resulting in a large amount of impurities and oil film adhering to the surface of the cuttings, affecting the results of subsequent analytical tests such as three-dimensional quantitative fluorescence, rock pyrolysis analysis, XRF element analysis, etc., and having a greater impact on aspects such as lithology identification, formation evaluation, and discovery of oil and gas shows.

[0005] Therefore, how to effectively improve the cleaning efficiency and cleaning effect of synthetic-based logging cuttings is a technical problem that those skilled in the art need to solve at present. Summary of the Invention

[0006] The purpose of the present invention is to provide a cleaning device and method for improving the cleaning efficiency of synthetic-based logging cuttings and realizing automatic cleaning.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A cleaning device for cleaning synthetic-based logging cuttings, comprising:

[0009] A cleaning main body, in which a cavity is provided;

[0010] An ultrasonic component, installed outside the cleaning main body, for emitting ultrasonic waves into the cleaning main body;

[0011] A bubble generator, installed inside the cavity for providing bubbles;

[0012] A heating component for heating the liquid inside the cavity;

[0013] A liquid inlet, a liquid circulation outlet, a cuttings sampling port, and a sand discharge port are all installed on the cleaning main body and communicate with the cavity; a stock solution solenoid valve is installed at the stock solution outlet, a sand discharge solenoid valve is installed at the sand discharge port, and the liquid inlet can be selectively communicated with the synthetic base stock solution pipeline, the cleaning agent pipeline, or the liquid circulation outlet of the drilling system;

[0014] A controller, which is connected to the ultrasonic component, the bubble generator, the stock solution solenoid valve, and the sand discharge solenoid valve.

[0015] Preferably, the cleaning main body includes a housing and an inner tank, and a heat insulation layer is provided between the housing and the inner tank.

[0016] Preferably, a connecting edge is provided on the inner side of the opening of the housing, and the liquid inlet and the cuttings sampling port are both arranged on the connecting edge; a transparent observation window is also provided at the center of the connecting edge.

[0017] Preferably, the heating component includes a cavity heating wire and a temperature sensor. The cavity heating wire is located between the housing and the inner tank and surrounds the outer periphery of the inner tank, and the temperature sensor is installed on the inner wall of the inner tank. The controller is connected to the cavity heating wire and the temperature sensor.

[0018] Preferably, it further includes a liquid discharge port, a liquid discharge solenoid valve is installed at the liquid discharge port, and the controller is connected to the liquid discharge solenoid valve.

[0019] Preferably, the ultrasonic component includes an ultrasonic controller and an ultrasonic transducer. The ultrasonic controller is arranged on the side wall of the cleaning main body, and the ultrasonic transducer is located at the bottom of the cleaning main body.

[0020] Preferably, the ultrasonic controller includes an ultrasonic power supply, a timer, a temperature control switch, and an ultrasonic frequency setting component. The ultrasonic power supply is used to turn on or off the ultrasonic transducer, the timer is used to control the opening duration of the ultrasonic transducer, the temperature control switch is used to control the start and stop of the heating component, and the ultrasonic frequency setting component is used to set the emission frequency of the ultrasonic transducer.

[0021] Preferably, it further includes an intake pipe, and a barometer, an air heating wire, an air solenoid valve, and a pressure regulating valve installed on the intake pipe. The intake pipe is communicated with the bubble generator. The barometer is used to detect the gas pressure in the intake pipe. The air heating wire is used to heat the gas in the intake pipe. The air solenoid valve is used to conduct or close the intake pipe. The pressure regulating valve is used to adjust the gas pressure in the intake pipe. The controller is connected to the barometer, the air heating wire, the air solenoid valve, and the pressure regulating valve.

[0022] Preferably, the bubble generator includes an inner layer pipe, a middle layer pipe, and an outer layer pipe. The inner layer pipe, the middle layer pipe, and the outer layer pipe are communicated in sequence and are spirally wound around the bottom of the cavity. A plurality of air holes are provided on the inner layer pipe, the middle layer pipe, and the outer layer pipe. And the air holes of at least two of the inner layer pipe, the middle layer pipe, and the outer layer pipe are respectively arranged upward or downward.

[0023] A cleaning method, using the above cleaning device, includes the following steps:

[0024] Add synthetic-based mud cuttings into the cleaning main body.

[0025] Add the synthetic-based stock solution in the synthetic-based stock solution pipeline of the drilling system into the cavity of the cleaning main body, and control the synthetic-based stock solution to circulate between the liquid inlet and the liquid circulation outlet.

[0026] After cleaning for a first preset time, send the synthetic-based stock solution back to the synthetic-based stock solution pipeline, and add a cleaning agent to the liquid inlet. After cleaning for a second preset time, discharge the cleaning agent from the cavity.

[0027] During the cleaning process, control the ultrasonic component to emit high-frequency ultrasonic waves and low-frequency electromagnetic waves respectively, control the bubble generator to introduce bubbles into the synthetic-based stock solution, and control the heating component to heat the cleaning main body.

[0028] After cleaning is completed, control the bubble generator to provide gas with a preset temperature to the cavity to dry the synthetic-based mud cuttings.

[0029] Discharge the synthetic-based mud cuttings from the sand discharge port.

[0030] Control the bubble generator to provide gas with a preset pressure to the cavity to clean the cavity.

[0031] The cleaning device provided by the present invention includes: a cleaning main body with a cavity provided therein; an ultrasonic component installed outside the cleaning main body for emitting ultrasonic waves into the cleaning main body; a bubble generator installed in the cavity for providing bubbles; a heating component for heating the liquid in the cavity; a liquid inlet, a liquid circulation outlet, a cuttings sampling inlet, and a sand discharge port, all installed on the cleaning main body and communicating with the cavity; a stock solution solenoid valve installed at the stock solution outlet, a sand discharge solenoid valve installed at the sand discharge port, and the liquid inlet can be selectively connected to the synthetic base stock solution pipeline, the cleaning agent pipeline, or the liquid circulation outlet of the drilling system; a controller, which is connected to the ultrasonic component, the bubble generator, the stock solution solenoid valve, and the sand discharge solenoid valve. The cleaning device provided by the present invention uses the cleaning main body to carry the synthetic base logging cuttings and uses the ultrasonic component to clean the synthetic base logging cuttings. It can improve the cleaning ability of the oil stains in the tiny pores of the cuttings by changing the frequency of the ultrasonic waves. Then, through the setting of the bubble generator, the stirring effect on the synthetic base logging cuttings can be achieved to realize the purpose of rinsing. At the same time, the synthetic base logging cuttings can be dried and the cavity can be cleaned; by using the circulating flow of the liquid between the liquid inlet and the liquid circulation outlet, the utilization efficiency of the synthetic base stock solution is improved. Moreover, by selectively connecting the liquid inlet to the synthetic base stock solution pipeline, the cleaning agent pipeline, or the liquid circulation outlet of the drilling system, the purpose of chemical cleaning with a cleaning agent can be achieved after physical cleaning with the synthetic base stock solution, further improving the cleaning effect; in addition, the setting of the controller can ensure the automatic and programmed control of the synthetic base logging cuttings from cleaning to drying, greatly improving the automation level of the cleaning of the synthetic base logging cuttings and laying a foundation for realizing cuttings identification and formation evaluation.

[0032] The cleaning method provided by the present invention includes the following steps: adding synthetic-based mud cuttings into the cleaning main body; adding the synthetic-based stock solution in the synthetic-based stock solution pipeline of the drilling system into the cavity of the cleaning main body, and controlling the synthetic-based stock solution to circulate between the liquid inlet and the liquid circulation outlet; after cleaning for a first preset time, sending the synthetic-based stock solution back to the synthetic-based stock solution pipeline, adding a cleaning agent into the liquid inlet, and after cleaning for a second preset time, discharging the cleaning agent from the cavity; during the cleaning process, controlling the ultrasonic component to emit high-frequency ultrasonic waves and low-frequency electromagnetic waves respectively, controlling the bubble generator to introduce bubbles into the synthetic-based stock solution, and controlling the heating component to heat the cleaning main body; after the cleaning is completed, controlling the bubble generator to provide a gas with a preset temperature to dry the synthetic-based mud cuttings; discharging the synthetic-based mud cuttings from the sand discharge port; controlling the bubble generator to provide a gas with a preset pressure to clean the cavity. The cleaning method provided by the present invention first performs physical cleaning with the synthetic-based stock solution, and the used synthetic-based stock solution flows back into the drilling system, and then performs chemical cleaning with the cleaning agent to ensure the cleaning effect; at the same time, by automatically controlling the ultrasonic component, the bubble generator and the heating component, while cleaning the synthetic-based mud cuttings, the cleaning ability of the oil stains in the tiny pores of the cuttings is improved through high-frequency and low-frequency ultrasonic waves, and then the stirring effect of the bubbles is utilized to prevent the synthetic-based mud cuttings from sinking to the bottom of the cavity, improving the cleaning efficiency, and the bubble generator can also be used to dry the synthetic-based mud cuttings and clean the cavity, realizing automatic control, saving manpower and material resources, and laying a foundation for realizing cuttings identification and formation evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of a specific embodiment of the cleaning device provided by the present invention;

[0035] Figure 2 is Figure 1 a schematic structural diagram of the bubble generator in the shown cleaning device;

[0036] Figure 3 It is a flow chart of the cleaning method provided by the present invention;

[0037] Wherein: 1 - ultrasonic power supply; 2 - timer; 3 - temperature control switch; 4 - ultrasonic frequency setting component; 5 - cavity heating wire; 6 - temperature sensor; 7 - stock solution solenoid valve; 8 - stock solution outlet; 9 - circulation pump; 10 - ultrasonic transducer; 11 - bubble generator; 11-1 - outer tube; 11-2 - middle tube; 11-3 - inner tube; 12 - sand discharge solenoid valve; 13 - sand discharge port; 14 - liquid discharge solenoid valve; 15 - liquid discharge port; 16 - barometer; 17 - air heating wire; 18 - air solenoid valve; 19 - air inlet pipe; 20 - cleaning agent inlet; 21 - liquid inlet; 22 - transparent observation window; 23 - filter screen; 24 - cuttings sampling port; 25 - pressure regulating valve. Detailed implementation manners

[0038] The core of the present invention is to provide a cleaning device and method, which can achieve efficient cleaning and fine cleaning, meet the cleaning requirements of cuttings of different sizes, and achieve the purpose of cuttings drying and cavity cleaning.

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0040] The cleaning device provided by the present invention can assist on-site personnel in quickly cleaning synthetic-based mud logging cuttings, reduce labor intensity, improve data quality, achieve efficient cleaning and drying of synthetic-based mud logging cuttings, and better meet the needs of on-site mud logging and oil exploration and development.

[0041] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of a specific implementation manner of the cleaning device provided by the present invention; Figure 2 For Figure 1 the schematic structural diagram of the bubble generator in the cleaning device shown; Figure 3 which is a flow chart of the cleaning method provided by the present invention.

[0042] In this implementation manner, the cleaning device is used for cleaning synthetic-based mud logging cuttings, and includes:

[0043] A cleaning main body, with a cavity provided inside the cleaning main body;

[0044] An ultrasonic component, installed outside the cleaning main body, for emitting ultrasonic waves into the cleaning main body;

[0045] A bubble generator 11, installed inside the cavity, for providing bubbles;

[0046] A heating component, for heating the liquid inside the cavity;

[0047] The liquid inlet 21, the liquid circulation outlet, the cuttings sampling port 24 and the sand discharge port 13 are all installed on the cleaning main body and communicate with the cavity; a stock solution electromagnetic valve 7 is installed at the stock solution outlet 8, a sand discharge electromagnetic valve 12 is installed at the sand discharge port 13, and the liquid inlet 21 can be selectively communicated with the synthetic base stock solution pipeline, the cleaning agent pipeline or the liquid circulation outlet of the drilling system.

[0048] A controller, which is connected to the ultrasonic component, the bubble generator 11, the stock solution electromagnetic valve 7 and the sand discharge electromagnetic valve 12.

[0049] Specifically, to achieve the purpose of efficient cuttings cleaning, the cleaning device mainly adopts a three-stage cleaning and drying mode. After the cuttings are collected by the cuttings collection device, they enter the cavity of the cleaning main body through the cuttings sampling port 24. First, the collected cuttings are initially cleaned with the synthetic base stock solution. During the cleaning process, the controllable pressure bubble generator 11 is used for mixing, stirring and cleaning. Then, the synthetic base stock solution is discharged. The synthetic base stock solution needs to be recycled to save the synthetic base stock solution. After the synthetic base stock solution cleaning is completed, the synthetic base stock solution is sent back to the drilling system. Then, clean water is pumped into the cavity and relevant chemical cleaning reagents are added to be mixed into a cleaning agent, and high-frequency and low-frequency ultrasonic waves and bubbles are used for combined cleaning. Through the combination of physical cleaning and chemical cleaning, the cleaning of the oil stains in the microvoids of the cuttings is completed. Then, the waste liquid after cleaning is directly discharged. Finally, the cuttings in the container are dried with pressurized air. First, the cuttings are blown dry with normal temperature air, and then the cuttings are dried with heated air. After the drying of the cuttings is completed, the dried cuttings are collected into a cuttings tray through the sand discharge port 13, and finally the cleaning and drying of the cuttings are completed; that is to say, operation programs such as cuttings stock solution cleaning, cuttings ultrasonic cleaning, cuttings drying, and cuttings purging are respectively formed according to the work process; during the ultrasonic cleaning process, the liquid in the cleaning main body can be the synthetic base stock solution, which is added to the cavity through the liquid inlet 21 for the preliminary cleaning of the cuttings, or it can be the cleaning agent, which is added to the cavity through the detergent inlet for the main cleaning process of the cuttings.

[0050] The cleaning device provided by the present invention uses a cleaning main body to carry synthetic-based mud cuttings and uses an ultrasonic component to clean the synthetic-based mud cuttings. By changing the frequency of the ultrasonic wave, the cleaning ability of the oil stain in the tiny pores of the cuttings can be improved. Then, through the setting of the bubble generator 11, the agitation effect on the synthetic-based mud cuttings can be achieved to realize the purpose of rinsing. At the same time, the synthetic-based mud cuttings can be dried and the cavity can be cleaned. By using the circulating flow of the liquid between the liquid inlet 21 and the liquid circulation outlet, the utilization efficiency of the synthetic-based stock solution can be improved. Moreover, the liquid inlet 21 can be selectively connected to the synthetic-based stock solution pipeline, the cleaning agent pipeline or the liquid circulation outlet of the drilling system, so that after physical cleaning with the synthetic-based stock solution, chemical cleaning with the cleaning agent can be carried out to further improve the cleaning effect. In addition, by using the setting of the controller, the automatic and programmed control of the synthetic-based mud cuttings from cleaning to drying can be ensured, greatly improving the automation level of the cleaning of the synthetic-based mud cuttings and laying a foundation for realizing cuttings identification and formation evaluation.

[0051] In some embodiments, the liquid inlet 21 and the stock solution outlet 8 are connected. The liquid inlet 21 is connected to the top of the cavity of the cleaning main body, and the stock solution outlet 8 is connected to the bottom of the cavity of the cleaning main body. Specifically, the cuttings sampling port 24, that is, the cuttings sampling port, has an open angle of 50 degrees. The surface of the cuttings sampling port 24 is smooth and funnel-shaped. A filter screen 23 is installed at the cuttings sampling port 24 to filter out the cuttings particles with a diameter greater than 10 mm. A flushing device is installed at the cuttings sampling port 24 to bring the cuttings into the cavity through the liquid flow.

[0052] Specifically, a control program is installed in the controller. The program realizes the control of devices such as the pressure and gas temperature of the cuttings sampling port 24, the sand discharge port 13, the liquid inlet 21, the stock solution outlet 8, and the bubble generator 11, and forms operation programs such as cuttings stock solution cleaning, cuttings chemical cleaning, cuttings drying, and cuttings purging according to the working process.

[0053] Preferably, the sand discharge port 13, that is, the cuttings sand discharge port 13, has a tapered structure that is wider at the top and narrower at the bottom. This sand discharge port 13 is used to discharge the dried cuttings. A sand discharge solenoid valve 12 is installed below the sand discharge port 13. When the user operates the sand discharge solenoid valve 12, the cuttings will automatically fall into the collection box below.

[0054] In some embodiments, the cleaning main body includes a housing and an inner tank, and a heat insulation layer is provided between the housing and the inner tank. Specifically, a cleaning agent inlet 20 is installed above the top of the housing and is connected to the housing by screws. The cleaning agent inlet 20 can be removed for cleaning as needed; a liquid inlet 21 is installed above the top of the housing and is connected to the housing by screws. The liquid inlet 21 can be removed for cleaning as needed. Further, heat insulation pads are fixedly installed between the inner tank and the housing of the cleaning main body and at the top of the cleaning main body. The heat insulation pads are fixedly bonded to the housing by strong glue.

[0055] In some embodiments, a connecting edge is provided on the inner side of the opening of the housing. Both the liquid inlet 21 and the cuttings sampling port 24 are provided on the connecting edge; a transparent observation window 22 is also provided at the center of the connecting edge. Specifically, the transparent observation window 22 is provided above the top of the cleaning main body. The position of the transparent observation window 22 is in the center of the housing. The transparent observation window 22 can be manually opened to facilitate observing the cleaning condition of the cuttings.

[0056] In some embodiments, the heating assembly includes a cavity heating wire 5 and a temperature sensor 6. The cavity heating wire 5 is located between the housing and the inner tank and surrounds the outer periphery of the inner tank. The temperature sensor 6 is installed on the inner wall of the inner tank. The controller is connected to both the cavity heating wire 5 and the temperature sensor 6. Specifically, the cavity heating wire 5 is installed at the bottom of the inner tank. The cavity heating wire 5 is distributed in a ring shape at the bottom side of the inner tank to heat the liquid in the cavity according to the user's setting, ensuring that a certain temperature is maintained inside the cavity. The cleaning effect of ultrasonic waves will be further enhanced in a high-temperature environment.

[0057] In some embodiments, a drain port 15 is further included. A drain solenoid valve 14 is installed at the drain port 15. The controller is connected to the drain solenoid valve 14. The waste liquid generated after the cuttings are cleaned is discharged through the drain port 15. The drain port 15 is mostly fixed to the bottom of the housing by screws or welded to the bottom of the housing; the drain port 15 is used to discharge the waste liquid in the cavity, and the liquid circulation outlet is used to circulate the liquid in the cavity back to the liquid inlet 21. Specifically, the liquid circulation outlet is connected to the liquid inlet 21 at the top of the housing, and a small circulation pump 9 is installed therebetween for the circulation and reuse of the synthetic base stock solution. When the synthetic base stock solution is used multiple times and the liquid is dirty, the drain port 15 is opened to discharge the waste liquid.

[0058] In some embodiments, a cleaning agent inlet 20 is further included. The cleaning agent inlet 20 is installed on the cleaning main body; the cleaning agent inlet 20 is arranged near the liquid inlet 21, which is convenient for adding and mixing with the cleaning agent. It should be noted that after the cleaning of the synthetic base stock solution is completed, the cleaning agent can enter the cavity through the cleaning agent inlet 20 or flow in through the liquid inlet 21.

[0059] In some embodiments, the ultrasonic component includes an ultrasonic controller and an ultrasonic transducer 10. The ultrasonic controller is disposed on the side wall of the cleaning main body, and the ultrasonic transducer 10 is located at the bottom of the cleaning main body. Specifically, the temperature sensor 6 adopts a platinum resistance temperature measurement system to monitor the temperature of the cavity, and feeds back the temperature to the controller of the cleaning device. The cleaning device collects this temperature and determines whether to perform heating control according to the user setting.

[0060] In some embodiments, the ultrasonic controller includes an ultrasonic power supply 1, a timer 2, a temperature control switch 3, and an ultrasonic frequency setting component 4. The ultrasonic power supply 1 is used to turn on or off the ultrasonic transducer 10. The timer 2 is used to control the on-time of the ultrasonic transducer 10. The temperature control switch 3 is used to control the start and stop of the heating component. The ultrasonic frequency setting component 4 is used to set the emission frequency of the ultrasonic transducer 10. Specifically, the ultrasonic power supply 1, the timer 2, the temperature control switch 3, and the ultrasonic frequency setting component 4 are arranged in sequence from top to bottom; the timer 2 can set the on-time of the ultrasonic transducer 10, such as the emission time of high-frequency ultrasonic waves or the emission time of low-frequency ultrasonic waves, etc. The setting of the timer 2 can facilitate the user to set, and the system determines the ultrasonic cleaning time according to the time set by the user.

[0061] Furthermore, the ultrasonic controller is connected to the outer shell by screws. The ultrasonic controller includes an ultrasonic power supply 1, a timer 2, a temperature control switch 3, and an ultrasonic frequency setting component 4. Each component is fixed to the ultrasonic controller by screws; preferably, the ultrasonic transducer 10 is installed at the bottom of the cleaning main body. The distance between the bottom of the inner tank and the bottom of the outer shell is relatively close, which can effectively prevent the weakening of the intensity of the ultrasonic waves entering the inner tank. The ultrasonic wave transducer is composed of multiple piezoelectric conversion devices and is neatly arranged in a structure matching the shape of the bottom, and is connected to the upper inner tank by screws. The thickness of the upper inner tank is less than 5 mm, and the lower part is connected to the outer bottom of the outer shell; the ultrasonic transducer 10 is encapsulated at the bottom of the outer shell. Preferably, the ultrasonic transducer 10 supports the emission of two frequencies of ultrasonic waves, including high-frequency ultrasonic waves and low-frequency ultrasonic waves, and performs dual-mode ultrasonic cleaning operations according to the user setting. The high-frequency ultrasonic waves are used for overall cleaning, and the low-frequency ultrasonic waves are used for cleaning the oil stains in the microvoids. Specifically, the user sets the emission of high and low frequencies of ultrasonic waves through the ultrasonic frequency setting component 4, and uses two different frequencies of ultrasonic waves to clean the synthetic-based mud cuttings. Among them, low-frequency ultrasonic waves, that is, 40 KHz ultrasonic waves, are used for primary cleaning of the cuttings, focusing on cleaning large cuttings. High-frequency ultrasonic waves, that is, 100 KHz ultrasonic waves, are used for secondary cleaning of the cuttings, and fine cleaning is performed on the fine cuttings particles and the tiny gaps on the large particles to achieve the purpose of efficient cleaning.

[0062] In some embodiments, it further includes an intake pipe 19, and a barometer 16, an air heating wire 17, an air solenoid valve 18, and a pressure regulating valve 25 installed on the intake pipe 19. The intake pipe 19 is communicated with the bubble generator 11. The barometer 16 is used to detect the gas pressure in the intake pipe 19. The air heating wire 17 is used to heat the gas in the intake pipe 19. The air solenoid valve 18 is used to conduct or close the intake pipe 19. The pressure regulating valve 25 is used to regulate the gas pressure in the intake pipe 19. The controller is connected to the barometer 16, the air heating wire 17, the air solenoid valve 18, and the pressure regulating valve 25. Specifically, the inlet end of the bubble generator 11 is connected with an intake pipe 19. A pressure regulating valve 25 is installed on the intake pipe 19, which is used to regulate the pressure of the gas entering the intake pipe 19. An air heating wire 17 is installed on the intake pipe 19, which is wound in a ring shape and the temperature is controllable. The gas entering the bubble generator 11 has the function of rapid heating. When the gas with a certain pressure and temperature enters the bubble generator 11, a high-temperature pressurized air flow is formed. This air flow can perform high-temperature drying on the cuttings and also has a running time setting function. An air solenoid valve 18 is installed on the intake pipe 19 to effectively control the drying time and complete the rapid drying of the cuttings according to the drying time set by the user. Further, the air heating wire 17 can achieve rapid heating of the gas, and the required temperature is not greater than 80 degrees.

[0063] In some embodiments, the bubble generator 11 includes an inner layer tube 11-3, a middle layer tube 11-2, and an outer layer tube 11-1. The inner layer tube 11-3, the middle layer tube 11-2, and the outer layer tube 11-1 are connected in sequence and spirally surround the bottom of the cavity. A number of air holes are provided on the inner layer tube 11-3, the middle layer tube 11-2, and the outer layer tube 11-1, and the air holes of at least two of the inner layer tube 11-3, the middle layer tube 11-2, and the outer layer tube 11-1 are respectively arranged upward or downward. It should be noted that the air hole facing upward means that the air hole faces the opening of the cavity, and the air hole facing downward means that the air hole faces the bottom of the cavity. Specifically, the bubble generator 11 is fixedly surrounded around the inner wall of the inner tank bottom. The bubble generator 11 includes at least three layers, and air holes are provided on each layer of the pipeline. Preferably, the air holes of the inner layer tube 11-3 and the outer layer tube 11-1 face upward, and the air holes of the middle layer tube 11-2 face downward. Each air hole is divided into multiple groups to ensure that the generated bubbles are uniform and powerful. When pressurized gas enters, uniform and pressurized bubbles can be formed in the cavity. In the presence of liquid, the bubbles have the function of rapid mixing and stirring. The cuttings particles move up and down rapidly under the action of the bubble flow, realizing the rapid rinsing of the cuttings. Further, each air hole is divided into multiple groups to ensure that the generated bubbles are uniform and powerful. When it is turned on, the air holes of the inner layer tube 11-3 and the outer layer tube 11-1 face upward to ensure that the gas is purged upward, and the air holes of the middle layer tube 11-2 are arranged downward to realize the upward purging of the lower cuttings. All the cuttings particles are in a state of circulating up and down in suspension, ensuring that the cuttings particles will not deposit at the bottom and affect the cleaning effect of the cuttings. When the pressurized gas enters from the intake pipe 19, uniform and pressurized bubbles can be formed in the cavity. Under the action of the bubble flow, the cuttings particles move up and down rapidly, realizing the rapid rinsing of the cuttings.

[0064] That is to say, the bubble generator 11 is one of the core components of the device. When cleaning the cuttings, the bubble generator 11 realizes the uniform stirring and suspension functions of the cuttings in the cavity through the control of gases with different pressures, replaces the existing motor stirring, ensures the up and down turning of the cuttings, realizes physical cleaning, and improves the cleaning effect of ultrasonic waves at the same time. When drying the cuttings, the bubble generator 11 is mainly responsible for the pressure control output of high-temperature gas to ensure that the cuttings particles are rapidly dried in the high-temperature and fast air flow.

[0065] This cleaning device is a cuttings cleaning device that combines physical cleaning, chemical cleaning, and ultrasonic cleaning, and realizes the rapid drying of cuttings by means of high temperature, gas convection, etc.; this device has the following beneficial effects:

[0066] Aiming at the problem that a large amount of oil substances and oil films adhere to the surface of cuttings and are difficult to clean under the conditions of synthetic-based drilling fluids, a synthetic-based logging cuttings ultrasonic bubble cleaning device is designed. It gives full play to the advantages of fast cleaning speed and high cleaning efficiency of ultrasonic cleaning. The dual-frequency ultrasonic transducer 10 is designed, and dual-mode ultrasonic cleaning with low frequency and high frequency is adopted to improve the cleaning ability of oil stains in the tiny pores of cuttings. In the rinsing of cuttings, the method of controllable-pressure bubble cleaning is adopted to achieve rapid rinsing of cuttings. The bubble generator 11 adopts controllable-pressure and controllable-temperature heating design to realize low-temperature drying of cuttings, ensuring automatic and programmed control of synthetic-based logging cuttings from cleaning to drying, greatly improving the automation level of synthetic-based logging cuttings cleaning, and laying a foundation for realizing cuttings identification and formation evaluation.

[0067] In addition to the above cleaning device, the present invention also provides a cleaning method, including the following steps:

[0068] Step S1: Add synthetic-based logging cuttings into the cleaning main body;

[0069] Step S2: Add the synthetic-based stock solution in the synthetic-based stock solution pipeline of the drilling system into the cavity of the cleaning main body, and control the synthetic-based stock solution to circulate between the liquid inlet 21 and the liquid circulation outlet;

[0070] Step S3: After cleaning for the first preset time, send the synthetic-based stock solution back to the synthetic-based stock solution pipeline, and add a cleaning agent into the liquid inlet 21. After cleaning for the second preset time, discharge the cleaning agent from the cavity;

[0071] Step S4: During the cleaning process, control the ultrasonic component to emit high-frequency ultrasonic waves and low-frequency electromagnetic waves respectively, control the bubble generator 11 to introduce bubbles into the synthetic-based stock solution, and control the heating component to heat the cleaning main body;

[0072] Step S5: After cleaning is completed, control the bubble generator 11 to provide gas with a preset temperature to dry the synthetic-based logging cuttings;

[0073] Step S6: Discharge the synthetic-based logging cuttings from the sand discharge port 13;

[0074] Step S7: Control the bubble generator 11 to provide gas with a preset pressure to clean the cavity.

[0075] The cleaning method provided by the present invention first performs physical cleaning using a synthetic-based stock solution. The used synthetic-based stock solution flows back into the drilling system, and then a cleaning agent is used for chemical cleaning to ensure the cleaning effect. At the same time, by automatically controlling the ultrasonic component, the bubble generator 11, and the heating component, while cleaning the synthetic-based mud logging cuttings, the cleaning ability of the oil stains in the tiny pores of the cuttings is improved through high-frequency and low-frequency ultrasonic waves. Then, by using the stirring action of the bubbles, the synthetic-based mud logging cuttings are prevented from sinking to the bottom of the cavity, improving the cleaning efficiency. The bubble generator 11 can also be used to dry the synthetic-based mud logging cuttings and clean the cavity, realizing automatic control, saving manpower and material resources, and laying a foundation for cuttings identification and formation evaluation.

[0076] The cleaning device and cleaning method provided by the present invention are mainly applied to the cleaning of synthetic-based mud logging cuttings. Of course, they can also be applied in other fields. In the prior art, for the chemical treatment of a large amount of oil-based cuttings at the drilling site, chemical reagent reaction treatment, high-temperature condensation and other means are mostly used to achieve the harmless treatment of oil-based cuttings. However, the present invention mainly focuses on cleaning a small amount of cuttings for logging analysis. The cuttings after cleaning need to maintain their original properties for the next step of laboratory analysis. At the same time, a combination of physical means such as dual-frequency ultrasonic cleaning and bubble cleaning and chemical cleaning with a detergent is used for cleaning, significantly improving the cleaning effect and cleaning efficiency.

[0077] Specifically, before using the cleaning device, first check the safety of each structure of the cleaning device and install each module and software system in sequence; plug in the device power supply, inject synthetic-based mud cuttings into the cavity of the cleaning main body through the cuttings inlet 24, and inject a certain amount of synthetic-based stock solution; set the ultrasonic working frequency and working time, and use low-frequency ultrasonic waves to clean the synthetic-based mud cuttings; adjust the air pressure, open the air solenoid valve 18, and start the bubble generator 11; clean the cuttings in a dual mode of bubbles and ultrasonic waves; after cleaning, open the stock solution outlet 8, drain the synthetic-based stock solution back to the circulation system, and close the stock solution outlet 8; open the cleaning agent inlet 20, inject the cleaning agent and clean water, and open the bubble generator 11; set the ultrasonic working frequency and working time, and use high-frequency ultrasonic waves and the bubble generator 11 to finely rinse the synthetic-based mud cuttings; after rinsing, open the drain port 15 to drain the waste liquid, and close the drain port 15; after rinsing, open the bubble generator 11 to blow the cuttings to the surface for drying; turn on the air heating wire 17, set a reasonable drying temperature, and turn on the bubble generator 11 to perform hot air circulation on the cuttings to dry the cuttings; open the sand discharge port 13, and place the dried cuttings on the cuttings tray; turn on the bubble generator 11 again, adjust the large-pressure gas to blow the inside of the cavity with high pressure to complete the cleaning work of the cavity; write an automated control program for the processes of cuttings stock solution cleaning, cleaning agent cleaning, gas drying, cavity cleaning, etc., to achieve the process automation control of the above four functions.

[0078] The cleaning device and method provided by the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A cleaning device for cleaning synthetic logging cuttings, characterized in that: include: A cleaning body, wherein a cavity is provided in the cleaning body; An ultrasonic component, installed outside the cleaning body, for emitting ultrasonic waves into the cleaning body; A bubble generator (11), installed in the cavity, for providing bubbles; A heating component, used for heating the liquid in the cavity; The liquid inlet (21), the liquid circulation outlet, the cuttings inlet (24) and the sand discharge outlet (13) are all installed on the cleaning body and are connected to the cavity; the raw liquid outlet (8) is installed with a raw liquid electromagnetic valve (7), the sand discharge outlet (13) is installed with a sand discharge electromagnetic valve (12), and the liquid inlet (21) can be connected to a synthetic base raw liquid pipeline, a cleaning agent pipeline or a liquid circulation outlet of the drilling system; A controller is connected to the ultrasonic component, the bubble generator (11), the raw liquid electromagnetic valve (7) and the sand discharge electromagnetic valve (12).

2. The cleaning device according to claim 1, characterized in that: The cleaning body comprises an outer shell and an inner tank, and a heat insulating layer is arranged between the outer shell and the inner tank.

3. The cleaning device according to claim 2, characterized in that: A connecting edge is provided inside the opening of the shell, and the liquid inlet (21) and the cuttings inlet (24) are both arranged on the connecting edge; a transparent observation window (22) is also provided at the center of the connecting edge.

4. The cleaning device according to claim 2, characterized in that: The heating component comprises a cavity heating wire (5) and a temperature sensor (6); the cavity heating wire (5) is located between the outer shell and the inner pot and surrounds the outer periphery of the inner pot; the temperature sensor (6) is mounted on the inner wall of the inner pot; and the controller is connected to both the cavity heating wire (5) and the temperature sensor (6).

5. The cleaning device according to claim 1, characterized in that: It also comprises a liquid discharge port (15), the liquid discharge port (15) is equipped with a liquid discharge solenoid valve (14), and the controller is connected to the liquid discharge solenoid valve (14).

6. The cleaning device according to claim 1, characterized in that: The ultrasonic component comprises an ultrasonic controller and an ultrasonic transducer (10); the ultrasonic controller is arranged on the side wall of the cleaning body, and the ultrasonic transducer (10) is located at the bottom of the cleaning body.

7. The cleaning device according to claim 6, characterized in that: The ultrasonic controller comprises an ultrasonic power supply (1), a timer (2), a temperature control switch (3) and an ultrasonic frequency setting component (4); the ultrasonic power supply (1) is used to turn on or off the ultrasonic transducer (10); the timer (2) is used to control the on time of the ultrasonic transducer (10); the temperature control switch (3) is used to control the start and stop of the heating component; and the ultrasonic frequency setting component (4) is used to set the transmission frequency of the ultrasonic transducer (10).

8. The cleaning device according to any one of claims 1 to 7, characterized in that: It also includes an intake pipe (19) and a barometer (16), an air heating wire (17), an air solenoid valve (18) and a pressure regulating valve (25) installed on the intake pipe (19); the intake pipe (19) is connected to the bubble generator (11); the barometer (16) is used to detect the gas pressure in the intake pipe (19); the air heating wire (17) is used to heat the gas in the intake pipe (19); the air solenoid valve (18) is used to open or close the intake pipe (19); the pressure regulating valve (25) is used to regulate the gas pressure in the intake pipe (19); the controller is connected to the barometer (16), the air heating wire (17), the air solenoid valve (18) and the pressure regulating valve (25).

9. The cleaning device according to any one of claims 1 to 7, characterized in that: The bubble generator (11) comprises an inner tube (11-3), a middle tube (11-2) and an outer tube (11-1); the inner tube (11-3), the middle tube (11-2) and the outer tube (11-1) are connected in sequence and spirally surround the bottom of the cavity; a plurality of air holes are arranged on the inner tube (11-3), the middle tube (11-2) and the outer tube (11-1); and the air holes of at least two of the inner tube (11-3), the middle tube (11-2) and the outer tube (11-1) are arranged to face upward or downward respectively.

10. A cleaning method, using the cleaning device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Adding synthetic base logging cuttings into the cleaning body; Adding synthetic base liquid in the synthetic base liquid pipeline of the drilling system into the cavity of the cleaning body, and controlling the synthetic base liquid to circulate between the liquid inlet (21) and the liquid circulation outlet; After cleaning for a first preset time, the synthetic base stock solution is returned to the synthetic base stock solution pipeline, and a cleaning agent is added to the liquid inlet (21), and after cleaning for a second preset time, the cleaning agent is discharged from the cavity; During the cleaning process, the ultrasonic component is controlled to emit high-frequency ultrasonic waves and low-frequency electromagnetic waves respectively, the bubble generator (11) is controlled to introduce bubbles into the synthetic base stock solution, and the heating component is controlled to heat the cleaning body; After the cleaning is completed, the bubble generator (11) is controlled to provide gas with a preset temperature into the cavity to dry the synthetic logging cuttings; Discharging the synthetic base logging rock cuttings from a sand discharge port (13); The bubble generator (11) is controlled to provide gas with a preset pressure into the cavity to clean the cavity.

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