Automatic rock debris collecting device and method

Abstract

The invention relates to the technical field of oil field exploration and development, and discloses an automatic rock debris collecting device and method.The automatic rock debris collecting device is characterized in that a suction pump communicates with an overhead groove, extracted drilling fluid with rock debris is conveyed to a vibrating screen, the vibrating screen is installed in a suspended mode through an elastic suspension part, a plurality of vibrating motors are installed on the vibrating screen, and the vibrating directions of the vibrating motors are different; the cleaning module flushes rock debris on the vibrating screen, and the upper computer is in communication connection with the vibrating motor and the cleaning module and used for starting the target vibrating motor and adjusting the vibration frequency of the target vibrating motor according to the lithology and the particle size of the rock debris so that the vibrating screen can screen out impurities on the rock debris. The vibrating screen is mounted through the elastic suspension piece in a suspension mode, resistance of the vibrating screen in the vibrating process is reduced, damage to the vibrating screen is reduced, and therefore the service life of equipment is prolonged; the corresponding vibration direction and vibration frequency are adopted according to the lithology and the particle size of the rock debris, and the rock debris cleaning cleanliness is improved.

Description

Technical Field

[0001] The present application relates to the technical field of oilfield exploration and development, and particularly to a device and method for automatic cuttings collection. Background Art

[0002] Cuttings logging is an important part of geological logging operations in oilfield exploration and development, and is an important basis for formation lithology identification, formation horizon judgment, and discovery and evaluation of oil and gas layers. As the first-hand geological logging data that can best represent the original information of the formation, cuttings collection is very important.

[0003] For a long time, the mainstream cuttings collection method at home and abroad has been manual fishing. Manual fishing of cuttings has the disadvantages of cumbersome work, large labor intensity, easy loss of real cuttings, and high operation safety risks. The backward cuttings collection technology forms a sharp contrast with the advanced drilling technology. There are also very few oilfields that use mechanical equipment to complete automatic cuttings collection. The current equipment has disadvantages such as low service life and low cleaning degree of cuttings washing, and cannot meet the on-site requirements.

[0004] Therefore, how to improve the service life of the equipment and the cleaning degree of cuttings washing is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present application is to provide a device and method for automatic cuttings collection, which are used to solve the disadvantages of the current equipment such as low service life and low cleaning degree of cuttings washing.

[0006] To solve the above technical problems, the present application provides an automatic cuttings collection device, including: a suction pump, an elastic suspension member, a vibrating screen, a vibrating motor, a cleaning module, and a host computer;

[0007] The suction pump is communicated with an overhead tank, and is used to convey the drilling fluid with cuttings extracted to the vibrating screen. The vibrating screen is suspended and installed through the elastic suspension member. A plurality of the vibrating motors are installed on the vibrating screen, and the vibration directions of each vibrating motor are different. The cleaning module is used to wash the cuttings on the vibrating screen. The host computer is respectively communicatively connected with the vibrating motor and the cleaning module, and is used to turn on the target vibrating motor and adjust the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings, so as to enable the vibrating screen to screen out the impurities on the cuttings.

[0008] Optionally, it further includes a camera connected to the host computer. The camera is used to take pictures of the cuttings on the vibrating screen, and the host computer uses image recognition technology to determine the lithology and particle size of the cuttings in the cuttings picture.

[0009] Optionally, it further includes a collection module and a weighing module disposed at the bottom of the collection module. The collection device is disposed at one end of the vibrating screen and is used to collect the cuttings after flushing. The weighing module is connected to the host computer and is used to weigh the weight of the cuttings after flushing.

[0010] Optionally, it further includes an alarm module connected to the host computer. The host computer is used to control the alarm module to issue corresponding early warning prompts according to the lithology, particle size of the cuttings, and the weight of the cuttings.

[0011] Optionally, the cleaning module is disposed above the vibrating screen. The cleaning direction of the cleaning module faces the collection module, and the vibrating screen is inclined. The end of the vibrating screen away from the collection module is lower than the end where the collection module is disposed.

[0012] This application also provides an automatic cuttings collection method, which is applied to the automatic cuttings collection device and includes:

[0013] After using a suction pump to transport the drilling fluid with cuttings to the vibrating screen, determine the lithology and particle size of the cuttings;

[0014] Determine the target vibration direction and target vibration frequency according to the lithology and the particle size;

[0015] According to the target vibration direction, turn on the corresponding target vibration motor on the vibrating screen, adjust the vibration frequency of the target vibration motor to the target vibration frequency, and at the same time control the cleaning module to clean the cuttings, so that the vibrating screen screens out the impurities on the cuttings.

[0016] Optionally, the determining the lithology and particle size of the cuttings includes:

[0017] Control a camera to take a photo of the cuttings on the vibrating screen;

[0018] Obtain the photo of the cuttings, and use image recognition technology to determine the lithology and particle size of the cuttings in the photo of the cuttings.

[0019] Optionally, after determining the lithology and particle size of the cuttings, it further includes:

[0020] Compare the lithology and the particle size with reference data; wherein, the reference data includes historical data of this well or data of the same type of adjacent wells;

[0021] If the lithologies are the same and the particle size is within the range of the particle size in the reference data ± a preset value, generate a normal prompt; wherein, the preset value is a positive value;

[0022] If the lithology is the same, the particle size is smaller than the particle size in the reference data, and the absolute value of the difference between the particle size and the particle size in the reference data is greater than the preset value, generate a warning that the drill bit life is approaching the end;

[0023] If the lithology is the same, the particle size is greater than the particle size in the reference data, and the difference between the particle size and the particle size in the reference data is greater than the preset value, generate a warning of collapse in the upper formation;

[0024] If the lithology is different, generate a prompt for the appearance of a new lithology.

[0025] Optionally, it further includes:

[0026] Obtain the suction pump flow rate of the suction pump and the drilling fluid outlet flow rate, and the weighing module weighs the weight of the cleaned cuttings in the collection module;

[0027] Determine the actual returned cuttings weight according to the suction pump flow rate, the drilling fluid outlet flow rate and the cuttings weight;

[0028] Determine the theoretical returned cuttings weight according to the sand fishing interval, the bit size and the cuttings density;

[0029] Calculate the difference between the actual returned cuttings weight and the theoretical returned cuttings weight;

[0030] If the absolute value of the difference is less than the set value, generate a normal prompt;

[0031] If the difference is greater than the set value, generate a warning prompt for abnormal hole shrinkage;

[0032] If the difference is less than the negative of the set value, generate a warning prompt for abnormal collapse;

[0033] Wherein, the set value is a positive value.

[0034] Optionally, the determining the actual returned cuttings weight according to the suction pump flow rate, the drilling fluid outlet flow rate and the cuttings weight includes:

[0035] Calculate the actual returned cuttings weight using a preset formula;

[0036] The preset formula is: m 返 =Q 出 ×m 称 / Q 泵 ;

[0037] Wherein, m 返 is the actual returned cuttings weight, Q 出 is the drilling fluid outlet flow rate, m 称 is the cuttings weight, Q 泵For the flow rate of the suction pump.

[0038] An automatic cuttings collection device provided by the present application includes: a suction pump, an elastic suspension member, a vibrating screen, a vibrating motor, a cleaning module, and a host computer; the suction pump is communicated with an overhead tank for conveying the extracted drilling fluid with cuttings to the vibrating screen, the vibrating screen is suspended and installed through the elastic suspension member, a plurality of vibrating motors are installed on the vibrating screen, and the vibration directions of each vibrating motor are different. The cleaning module is used to wash the cuttings on the vibrating screen, and the host computer is respectively communicatively connected with the vibrating motor and the cleaning module for turning on a target vibrating motor and adjusting the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings, so as to screen out impurities on the cuttings by the vibrating screen. By installing the vibrating screen in a suspended manner through the elastic suspension member, the resistance of the vibrating screen during vibration can be reduced, the damage to the vibrating screen can be reduced, and thus the service life of the equipment can be improved; and corresponding vibration directions and vibration frequencies are adopted according to the lithology and particle size of the cuttings, the cleaning degree of the cuttings is improved, and it is also convenient to make an accurate wellbore warning according to the weight of the cuttings after cleaning.

[0039] A beneficial effect such as an automatic cuttings collection method provided by the present application corresponds to the device, and the effect is as above. Description of the Drawings

[0040] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0041] Figure 1 It is a structural diagram of an automatic cuttings collection device provided by an embodiment of the present application;

[0042] Figure 2 It is a flowchart of an automatic cuttings collection method provided by an embodiment of the present application;

[0043] The reference numerals are as follows: 1 is a suction pump, 2 is a vibrating screen, 3 is a host computer, 4 is a cleaning module, 5 is a camera, 6 is a collection module, 7 is a weighing module, and 8 is an alarm module. Detailed Embodiments

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0045] The core of this application is to provide a device and method for automatic cuttings collection, which is used to improve the service life of the equipment and the cleaning degree of cuttings cleaning.

[0046] In order to enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be made in conjunction with the accompanying drawings and specific implementation manners.

[0047] Figure 1 It is a structural diagram of a device for automatic cuttings collection provided by an embodiment of this application. As Figure 1 shown, a device for automatic cuttings collection, characterized in that it includes: a suction pump 1, an elastic suspension member, a vibrating screen 2, a vibrating motor, a cleaning module 4 and a host computer 3; the suction pump 1 is communicated with an overhead tank for conveying the extracted drilling fluid with cuttings to the vibrating screen 2, the vibrating screen 2 is suspended and installed through the elastic suspension member, a plurality of vibrating motors are installed on the vibrating screen 2, and the vibration directions of each vibrating motor are different. The cleaning module 4 is used to wash the cuttings on the vibrating screen 2, and the host computer 3 is respectively communicatively connected with the vibrating motor and the cleaning module 4 for turning on the target vibrating motor and adjusting the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings, so as to enable the vibrating screen 2 to screen out impurities on the cuttings.

[0048] The vibrating screen 2 is installed in a suspended manner, and the elastic suspension member can be a rubber rope, etc. The vibrating screen 2 can be a linear vibrating screen. The vibrating motors are installed on the vibrating screen 2, and the installation directions of each vibrating motor are different so that the vibration directions of the vibrating screen 2 are different. Among them, the vibration directions include left-right vibration, up-down vibration and front-back vibration. For different lithologies and particle sizes, different vibration directions and vibration frequencies have different washing effects on the cuttings during cleaning. Therefore, turning on the target vibrating motor and adjusting the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings can improve the cleaning degree of cuttings cleaning. How to turn on the target vibrating motor and adjust the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings will be described in detail in the method embodiment below. The vibrating screen 2 screens out impurities on the cuttings, and the impurities mainly refer to drilling fluid and cuttings smaller than the diameter of the screen holes of the vibrating screen 2.

[0049] An automatic cuttings collection device provided by an embodiment of the present application includes: a suction pump, an elastic suspension member, a vibrating screen, a vibrating motor, a cleaning module, and a host computer; the suction pump is communicated with an overhead tank and is used to convey the extracted drilling fluid with cuttings to the vibrating screen. The vibrating screen is suspended and installed through the elastic suspension member. A plurality of vibrating motors are installed on the vibrating screen, and the vibration directions of each vibrating motor are different. The cleaning module is used to wash the cuttings on the vibrating screen. The host computer is communicatively connected to the vibrating motor and the cleaning module respectively, and is used to turn on the target vibrating motor and adjust the vibration frequency of the target vibrating motor according to the lithology and particle size of the cuttings, so as to screen out impurities on the cuttings by the vibrating screen. By installing the vibrating screen in a suspended manner through the elastic suspension member, the resistance of the vibrating screen during vibration can be reduced, the damage to the vibrating screen can be reduced, and thus the service life of the equipment can be improved; and corresponding vibration directions and vibration frequencies are adopted according to the lithology and particle size of the cuttings, the cleaning degree of the cuttings is improved, and it is also convenient to make an accurate wellbore warning according to the weight of the washed cuttings later.

[0050] Based on the above embodiment, the embodiment of the present application further includes a camera 5 connected to the host computer 3. The camera 5 is used to take pictures of the cuttings on the vibrating screen 2, and the host computer 3 uses image recognition technology to determine the lithology and particle size of the cuttings in the cuttings picture.

[0051] The camera 5 sends the taken pictures of the cuttings to the host computer 3. The host computer 3 uses image recognition technology to determine the lithology and particle size of the cuttings in the cuttings picture. Compared with determining the lithology and particle size of the cuttings by manual comparison and measurement, using image recognition technology realizes automation and has high efficiency, and also saves labor costs. Moreover, through the camera 5, a preliminary judgment of the lithology of the cuttings is completed, and in the development wells with simple well conditions, the workload of geological personnel is reduced.

[0052] Based on the above embodiment, the embodiment of the present application further includes a collection module 7 and a weighing module 7 provided at the bottom of the collection module 7. The collection device 7 is provided at one end of the vibrating screen 2. The collection device 6 is used to collect the washed cuttings. The weighing module 7 is connected to the host computer 3 and is used to weigh the weight of the washed cuttings. Among them, the collection module 6 can be connected to the host computer 3. After the current collection module collects cuttings of a preset weight, the host computer 3 switches to the next collection module to collect cuttings.

[0053] Further, the cleaning module 4 is provided above the vibrating screen 2. The cleaning direction of the cleaning module 4 faces the collection module 6, and the vibrating screen 2 is inclined. One end of the vibrating screen 2 away from the collection module 6 is lower than the end where the collection module 6 is provided. After the cuttings on the vibrating screen 2 are washed, they fall into the collection module 6. One end of the vibrating screen 2 away from the collection module 6 is lower than the end where the collection module 6 is provided, which can effectively prevent the cuttings from falling into the collection module 6 before the cleaning module 4 has time to fully wash the cuttings.

[0054] Based on the above embodiments, the embodiment of the present application further includes an alarm module 8 connected to the host computer 3, and the host computer 3 is used to control the alarm module 8 to issue corresponding early warning prompts according to the lithology, particle size, and weight of the cuttings.

[0055] By setting the alarm module 8 to issue corresponding early warning prompts, it can prompt the staff, reduce the occurrence of downhole complex situations, and effectively improve the efficiency of drilling operations.

[0056] Based on the above embodiments, Figure 2 is a flowchart of an automatic cuttings collection method provided by an embodiment of the present application. As Figure 2 shown, it is applied to the above automatic cuttings collection device and includes:

[0057] S10: After using the suction pump to transport the drilling fluid with cuttings to the vibrating screen, determine the lithology and particle size of the cuttings;

[0058] S11: Determine the target vibration direction and target vibration frequency according to the lithology and particle size;

[0059] S12: According to the target vibration direction, turn on the corresponding target vibration motor on the vibrating screen, adjust the vibration frequency of the target vibration motor to the target vibration frequency, and at the same time control the cleaning module to clean the cuttings, so that the vibrating screen screens out the impurities on the cuttings.

[0060] In step S10, regarding how to determine the lithology and particle size of the cuttings, specifically, control the camera 5 to take a photo of the cuttings on the vibrating screen 2; obtain the photo of the cuttings, and use image recognition technology to determine the lithology and particle size of the cuttings in the photo of the cuttings. The preliminary judgment of the lithology of the cuttings is completed through the camera 2, which reduces the workload of geological personnel in development wells with simple well conditions.

[0061] In step S11, how to determine the target vibration direction and target vibration frequency according to the lithology and particle size, specifically, the host computer stores the mapping relationship between the lithology, particle size, vibration direction, and vibration frequency. According to the mapping relationship, the target vibration direction and target vibration frequency corresponding to a certain lithology and a certain particle size can be determined. These mapping relationships can be obtained through experiments to test the vibration direction and vibration frequency and other parameter combinations that can achieve the best separation and washing effects of cuttings under different conditions such as cuttings lithology, particle size, and drilling fluid performance. Among them, the target vibration direction includes left - right vibration, up - down vibration, front - back vibration, and combined vibration.

[0062] Further, after determining the lithology and particle size of the cuttings, it further includes: comparing the lithology and particle size with reference data; wherein, the reference data includes the historical data of this well or the data of the same type of adjacent wells; under the conditions of the same (or similar) drilling parameters, if the lithologies are the same and the particle size is within the range of the particle size in the reference data ± a preset value, a normal prompt is generated; wherein, the preset value is a positive value; if the lithologies are the same, the particle size is smaller than the particle size in the reference data, and the absolute value of the difference between the particle size and the particle size in the reference data is greater than the preset value, a warning that the drill bit life is approaching the end is generated; if the lithologies are the same, the particle size is greater than the particle size in the reference data, and the difference between the particle size and the particle size in the reference data is greater than the preset value, a warning of collapse in the upper formation during drilling is generated; if the lithologies are different, a prompt of the appearance of a new lithology is generated. Specifically, the preset value can be 10% of the particle size in the reference data.

[0063] After the impurity on the cuttings is removed by the vibrating screen 2, the weighing module 7 weighs the weight of the cleaned cuttings in the collection module 6 and sends the weight of the cuttings to the host computer 3. The host computer 3 will perform the following steps: obtain the pumping flow rate of the suction pump and the drilling fluid outlet flow rate, and the weighing module 7 weighs the weight of the cleaned cuttings in the collection module 6; determine the actual returned cuttings weight according to the pumping flow rate of the suction pump, the drilling fluid outlet flow rate and the weight of the cuttings; determine the theoretical returned cuttings weight according to the sand fishing interval, the bit size and the cuttings density; calculate the difference between the actual returned cuttings weight and the theoretical returned cuttings weight; if the absolute value of the difference is less than the set value, a normal prompt, that is, a normal fluctuation range, is generated; if the difference is greater than the set value, a warning prompt of abnormal hole shrinkage is generated; if the difference is less than the negative set value, a warning prompt of abnormal collapse is generated; wherein, the set value is a positive value. Specifically, the set value is 5% of the theoretical returned cuttings weight.

[0064] Regarding how to determine the theoretical returned cuttings weight according to the sand fishing interval, the bit size and the cuttings density, it includes: calculating the actual returned cuttings weight using a preset formula; the preset formula is: m 返 =Q 出 ×m 称 / Q 泵 ; wherein, m 返 is the actual returned cuttings weight, Kg; Q 出 is the drilling fluid outlet flow rate, L / min; m 称 is the cuttings weight, Kg; Q 泵 is the pumping flow rate of the suction pump, L / min.

[0065] Regarding how to determine the theoretical returned cuttings weight according to the sand fishing interval, the bit size and the cuttings density, it includes: calculating the theoretical returned cuttings weight using a formula. The formula is: m 理论 =ρhπD 2 / 4; wherein, m 理论is the theoretical weight of the returned cuttings, Kg; ρ is the density of the cuttings, Kg / m 3 ; h is the sand fishing interval, m; D is the current bit diameter, m.

[0066] An automatic cuttings collection method provided by an embodiment of the present application includes: after using a suction pump to transport the drilling fluid with cuttings to a vibrating screen, determining the lithology and particle size of the cuttings; determining the target vibration direction and target vibration frequency according to the lithology and particle size; turning on the corresponding target vibration motor on the vibrating screen according to the target vibration direction, and adjusting the vibration frequency of the target vibration motor to the target vibration frequency, and at the same time turning on the cleaning module to clean the cuttings, so that the vibrating screen screens out impurities on the cuttings. The vibrating screen is installed in a suspended manner through an elastic suspension member, which can reduce the resistance of the vibrating screen during vibration, reduce the damage to the vibrating screen, and thus improve the service life of the equipment; and corresponding vibration directions and vibration frequencies are adopted according to the lithology and particle size of the cuttings, improving the cleaning degree of the cuttings cleaning, and also facilitating subsequent accurate wellbore warning based on the weight of the cleaned cuttings.

[0067] The upper computer reversely infers the stability of the wellbore wall in the wellbore, that is, whether there are abnormal conditions such as collapse and hole shrinkage in the wellbore, by judging and analyzing whether the difference between the actual returned cuttings weight and the theoretical returned cuttings weight of the returned cuttings is within the set value (error range), and gives an early warning in a timely manner, which has timeliness, reduces the occurrence of downhole complex situations, and effectively improves the efficiency of drilling operations.

[0068] Moreover, the automatic cuttings collection device of the present application is applicable to different drilling equipment, has good applicability, adds a wellbore stability warning function, and expands its application in wellbore safety.

[0069] The above has introduced in detail an automatic cuttings collection device and method provided by the present application. The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0070] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. An automatic rock cuttings collection device, characterized in that: include: Suction pump, elastic suspension, vibrating screen, vibrating motor, cleaning module and host computer; The suction pump is connected to the overhead tank and is used to transport the extracted drilling fluid with cuttings to the vibrating screen. The vibrating screen is suspended and installed by the elastic suspension member. A plurality of vibration motors are installed on the vibrating screen, and each vibration motor has a different vibration direction. The cleaning module is used to flush the cuttings on the vibrating screen. The host computer is respectively communicated with the vibration motor and the cleaning module, and is used to start the target vibration motor and adjust the vibration frequency of the target vibration motor according to the lithology and particle size of the cuttings, so that the vibrating screen can screen out impurities on the cuttings.

2. The automatic rock cuttings collection device according to claim 1, characterized in that: It also includes a camera connected to the host computer, the camera is used to take pictures of the rock cuttings on the vibrating screen, and the host computer uses image recognition technology to determine the lithology and particle size of the rock cuttings in the rock cuttings photos.

3. The automatic rock cuttings collection device according to claim 1, characterized in that: It also includes a collecting module and a weighing module arranged at the bottom of the collecting module. The collecting device is arranged at one end of the vibrating screen, the collecting device is used to collect the flushed rock cuttings, and the weighing module is connected to the host computer and is used to weigh the weight of the flushed rock cuttings.

4. The automatic rock cuttings collection device according to claim 3, characterized in that: It also includes an alarm module connected to the host computer, and the host computer is used to control the alarm module to issue corresponding early warning prompts according to the lithology, particle size and weight of the rock cuttings.

5. The automatic rock cuttings collection device according to claim 3, characterized in that: The cleaning module is arranged above the vibrating screen, the cleaning direction of the cleaning module is toward the collecting module, and the vibrating screen is arranged at an inclination, and one end of the vibrating screen away from the collecting module is lower than the end where the collecting module is arranged.

6. A method for automatically collecting rock cuttings, characterized in that: The automatic rock cuttings collection device according to any one of claims 1 to 5 comprises: After the drilling fluid with the rock cuttings is delivered to the shaker by means of a suction pump, the lithology and particle size of the rock cuttings are determined; determining a target vibration direction and a target vibration frequency according to the lithology and the particle size; The corresponding target vibration motor on the vibration screen is turned on according to the target vibration direction, and the vibration frequency of the target vibration motor is adjusted to the target vibration frequency, and at the same time, a cleaning module is controlled to clean the rock cuttings so that the vibration screen can screen out impurities on the rock cuttings.

7. The automatic rock cuttings collection method according to claim 6, characterized in that: Determining the lithology and particle size of the rock cuttings comprises: Controlling a camera to take pictures of rock cuttings on the vibrating screen; The rock cuttings photo is obtained, and the lithology and particle size of the rock cuttings in the rock cuttings photo are determined using image recognition technology.

8. The automatic rock cuttings collection method according to claim 6, characterized in that: After determining the lithology and particle size of the rock cuttings, it also includes: Comparing the lithology and the particle size with reference data; wherein the reference data includes historical data of the well or similar data of adjacent wells; If the lithology is the same and the particle size is within the range of the particle size in the reference data ± a preset value, a normal prompt is generated; wherein the preset value is a positive value; If the lithology is the same, the particle size is smaller than the particle size in the reference data, and the absolute value of the difference between the particle size and the particle size in the reference data is greater than the preset value, a warning is generated that the drill bit life is approaching the end; If the lithology is the same, the particle size is larger than the particle size in the reference data, and the difference between the particle size and the particle size in the reference data is larger than the preset value, an early warning of collapse of the upper formation of the drill is generated; If the lithology is different, a prompt indicating the emergence of a new lithology is generated.

9. The automatic rock cuttings collection method according to claim 6, characterized in that: Also includes: The suction pump flow rate and the drilling fluid outlet flow rate of the suction pump are obtained, and the weighing module weighs the weight of the cleaned cuttings in the collection module; Determine the actual returned cuttings weight according to the suction pump flow, the drilling fluid outlet flow and the cuttings weight; Determine the theoretical return cuttings weight based on the sand bailing interval, drill bit size and cuttings density; Calculating the difference between the actual weight of the returned rock cuttings and the theoretical weight of the returned rock cuttings; If the absolute value of the difference is less than the set value, a normal prompt is generated; If the difference is greater than the set value, an early warning prompt of abnormal shrinkage is generated; If the difference is less than the negative set value, an early warning of collapse abnormality is generated; Wherein, the set value is a positive value.

10. The automatic rock cuttings collection method according to claim 9, characterized in that: The determining the actual returned cuttings weight according to the suction pump flow, the drilling fluid outlet flow and the cuttings weight comprises: Calculating the actual weight of the returned cuttings using a preset formula; The preset formula is: 返 =Q 出 ×m 称 / Q 泵 ; Among them, m 返 is the actual returned cuttings weight, Q 出 is the drilling fluid outlet flow rate, m 称 is the weight of the cuttings, Q 泵 is the suction pump flow rate.

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