CN114016999A

CN114016999A - Borehole cleaning quantitative evaluation method based on rock debris return condition

Info

Publication number: CN114016999A
Application number: CN202111204099.3A
Authority: CN
Inventors: 李雷; 张继川; 谭宾; 陆灯云; 许期聪; 邓虎; 李枝林; 姚建林; 刘伟; 赵福金; 冯明; 刘洲
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-02-08
Anticipated expiration: 2041-10-15
Also published as: CN114016999B

Abstract

The invention discloses a borehole cleaning quantitative evaluation method based on rock debris return condition, which comprises the following steps: step 1: calculating the volume of theoretical rock debris which can return to the ground underground; step 2: obtaining the amount of returned rock debris which has returned to the ground in the drilling process and the amount of rock debris to be returned to the ground after the drilling is stopped, obtaining the actual amount of rock debris which can return to the ground according to the amount of returned rock debris and the amount of rock debris to be returned, and obtaining the actual volume of rock debris which can return to the ground according to the actual amount of rock debris; and step 3: and determining the cleanliness of the well according to the theoretical rock debris volume and the actual rock debris volume, and performing cleaning quantitative evaluation on the well according to the cleanliness of the well. The invention can judge the accumulation condition of the rock debris at the bottom of the well by comparing the amount of the rock debris returned from the ground in the drilling process with the amount of the rock debris theoretically generated at the bottom of the well, provides a basis for judging the form of a rock debris bed, guides the optimization of ground parameters and reduces the operation risk.

Description

Borehole cleaning quantitative evaluation method based on rock debris return condition

Technical Field

The invention belongs to the technical field of petroleum drilling, and particularly relates to a well cleaning quantitative evaluation method based on rock debris return condition.

Background

The horizontal section of the shale gas horizontal well is as long as more than 1500m, friction resistance and torque are easily increased greatly due to accumulation of rock debris in the later drilling period, even complex conditions such as drill sticking and pump holding are caused, drilling safety is seriously influenced, and engineering delay and cost increase are caused. Meanwhile, the uncleanness of the well bore can cause the problems of difficult well logging tool running, difficult casing running and well cementation and the like. The drilling accidents of the Longmaxi group in Changning, Wiyuan and other areas are frequent due to unclean well bores. By the end of 2020, 49 rotary guide tools in the Chongqing region of middle petroleum are buried in a well, so that the loss is huge, the technical bottleneck for improving the drilling speed and the efficiency of the horizontal well is formed, and the development of the safety benefit of the shale gas horizontal well is severely restricted. Therefore, the quantitative evaluation research of the well cleaning of the horizontal well needs to be strengthened, a well cleaning quantitative evaluation technology is formed, and the safe and rapid performance of the drilling operation of the horizontal well is guaranteed.

In order to solve the above-described technical problems, the following techniques have been proposed in the related art.

For example, patent document with publication number CN110067551A discloses a quantitative real-time monitoring method for well cleanliness and well wall stability, which includes volume calculation of actual returned rock debris, volume calculation of theoretical returned rock debris, calculation of real-time rock debris return rate and setting of a safe rock debris return rate window; in the patent, theoretical rock debris calculation is mainly considered to be calculated according to the borehole expansion rate, and the theoretical rock debris calculation is different from the actual situation; and the real rock debris amount can be calculated only by drying the rock debris to obtain the water content. However, the moisture content is a change value along with the change of the sieving cloth and the working state of the vibrating screen on the spot, so that an accurate calculation result cannot be obtained by adopting the parameter for calculation. In addition, the rock debris weighing device below the vibrating screen is easily influenced by circulating tank inspection personnel, and is a discontinuous measuring device, so that the rock debris weighing measuring precision is not high.

Also, for example, patent document CN112446560A discloses a comprehensive monitoring and evaluating system for cleaning of shale gas horizontal well, which mainly uses friction torque to analyze the cleanliness of well bore, belonging to qualitative analysis, but it does not provide a calibration method for rock debris amount, so its analysis result is not accurate.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a borehole cleaning quantitative evaluation method based on the rock debris return condition.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a borehole cleaning quantitative evaluation method based on debris return condition comprises the following steps:

step 1: calculating the volume of theoretical rock debris which can return to the ground underground;

step 2: obtaining the amount of returned rock debris which has returned to the ground in the drilling process and the amount of rock debris to be returned to the ground after the drilling is stopped, obtaining the actual amount of rock debris which can return to the ground according to the amount of returned rock debris and the amount of rock debris to be returned, and obtaining the actual volume of rock debris which can return to the ground according to the actual amount of rock debris;

and step 3: and determining the cleanliness of the well according to the theoretical rock debris volume and the actual rock debris volume, and performing cleaning quantitative evaluation on the well according to the cleanliness of the well.

In step 1, the calculation method of the theoretical rock fragment volume comprises the following steps:

V_{theory of the invention}=pi*R²/4*ΔH （1）

In the formula (1), V_{Theory of the invention}The method is characterized in that pi is a theoretical rock debris volume, pi is a circumferential rate, R is a theoretical borehole diameter obtained by adjacent well electrical measurement data, or an actual measurement borehole diameter obtained by a drilling system, or a corrected borehole diameter obtained by the theoretical borehole diameter and the actual measurement borehole diameter, and delta H is a borehole depth variation.

In step 2, the calculation method of the actual volume of the rock debris comprises the following steps:

V_{practice of}=G_{Practice of}/p （2）

Wherein the content of the first and second substances,

G_{actual =} G_{Has returned out}+G_{To be returned out} （3）

p=G_{Practice of}/V_{Theory of the invention} （4）

In formulae (2) to (4), V_{Practice of}Actual volume of rock debris, G_{Practice of}For the actual amount of rock debris, G_{Has returned out}Amount of returned rock debris, G_{To be returned out}And p is a correction coefficient.

In step 3, the calculation method of the well cleanliness comprises the following steps:

A=（100-100*( V_{theory of the invention}- V_{Practice of})/ V_{Theory of the invention}）% （5）

In formula (5), A represents the borehole cleanliness.

In step 3, the method for quantitatively evaluating the cleanliness of the well according to the cleanliness of the well comprises the following steps: setting an evaluation threshold, and when the cleanliness of the well is smaller than the evaluation threshold, indicating that underground rock debris is difficult to return and a rock debris bed exists; when the cleanliness of the well is greater than the evaluation threshold value, the borehole wall is shown to be unstable and collapse; and when the well cleanliness is within the evaluation threshold range, the well cleanliness is good, and the downhole condition is normal.

In the step 2, the amount of the rock debris to be returned to the ground later is the amount of the rock debris remained in the well hole after the drilling is stopped.

The method for acquiring the amount of the returned rock debris comprises the following steps:

step S1: when weighing is started, the rotating mechanism controls the two material receiving containers to rotate circularly between the material receiving station and the station to be received according to the rotating period, and when one material receiving container rotates to the material receiving station, the other material receiving container is just positioned at the station to be received;

step S2: the initial weight G1 of the receiving container positioned on the receiving station at the initial receiving time is obtained through the metering component, the current weight G2 of the receiving container is obtained through the metering component at the end time of the current rotation period, and then the rock debris amount G conveyed in the current rotation period is calculated according to the current weight G2 and the initial weight G1_{Period of rotation}；

Step S3: taking the end time of the previous rotation period as the start time of the next rotation period, controlling the rotation of the two material receiving containers by the rotating mechanism, controlling the rock debris to be separated from the material receiving containers in the rotation process, and repeating the step 2 to calculate the rock debris amount G conveyed in the current rotation period after the two material receiving containers are interchanged_{Period of rotation}；

Step S4: after the weighing is stopped, the rock debris quantity G conveyed according to each rotation period_{Period of rotation}And calculating the sum of the two to obtain the amount of the returned rock debris.

The rotating mechanism and the metering assembly are connected with the controller, and the controller is used for controlling the rotating mechanism to rotate and receiving data acquired by the metering assembly and calculating the amount of returned rock debris according to the acquired data.

The material receiving station and the station to be received are respectively and symmetrically arranged above and below the vertical direction, and the rotating mechanism controls the two material receiving containers to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers to turn circularly up and down in the vertical direction.

The rotating mechanism comprises a support, a rotating shaft and a first servo motor, two ends of the rotating shaft are respectively installed on the support through bearings, and a power shaft of the first servo motor is fixedly connected with the rotating shaft; the metering components are symmetrically fixed on the rotating shaft, and the receiving containers are respectively fixed on the metering components; the first servo motor controls the two material receiving containers to rotate circularly between the material receiving station and the station to be received through the rotating shaft.

The metering assembly comprises a plurality of weighing sensors which are respectively and symmetrically arranged at two ends of the bottom of the material receiving container; during measurement, the data acquired by the metering assembly is the sum of the data measured by each weighing sensor.

The material receiving container is a trough with an inverted trapezoidal cross section.

The material receiving station and the station to be received are respectively and symmetrically arranged on the left side and the right side of the same transverse plane, and the rotating mechanism controls the two material receiving containers to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers to rotate circularly left and right on the same transverse plane.

The metering components are weighing trays respectively fixed on the material receiving station and the station to be received, a spacing adsorption fixing mechanism is arranged between the rotating mechanism and the material receiving container, and when the rotating mechanism controls the material receiving container to start rotating, the rotating mechanism is fixedly connected with the material receiving container through the spacing adsorption fixing mechanism; when the rotating mechanism controls the material receiving container to reach the material receiving station and the station to be received, the rotating mechanism is disconnected with the material receiving container, and the material receiving container respectively stops on the weighing tray.

The rotating mechanism comprises a base, a rotating frame and a second servo motor, the middle of the rotating frame is movably arranged on the base, the second servo motor is fixed on the base and can drive the rotating frame to rotate, connecting arms are respectively arranged on two sides of the rotating frame, and the interval adsorption fixing mechanism is arranged between the connecting arms and the material receiving container.

The interval adsorption fixing mechanism comprises an electromagnet and a magnetic attraction body matched with the electromagnet, the electromagnet is fixed on the connecting arm, and the magnetic attraction body is fixed on the material receiving container.

The receiving container is a hollow cylinder.

The quantity of the returned rock debris is obtained by weighing through a screw conveyor, wherein the screw conveyor comprises a screw shaft, a weighing component and a conveying cylinder, the conveying cylinder comprises a feeding section, a metering section and a discharging section which are sequentially in sealing and flexible connection, the screw shaft is rotatably arranged in the conveying cylinder, two ends of the screw shaft are respectively arranged in the feeding section and the discharging section through bearings, and the weighing component is fixedly connected below the metering section;

step S11: calculating the transmission metering period of the rock debris passing through the metering section, wherein the transmission metering period of the rock debris passing through the metering section means that the rock debris in the metering section in the previous transmission metering period is just completely output when the next transmission metering period starts;

step S22: when weighing is started, firstly, collecting the weight of rock debris in a metering section in the current transmission metering period at the starting moment of the current transmission metering period through a weighing component, and then collecting the weight of the rock debris in the metering section in the next transmission metering period at the ending moment of the current transmission metering period; according to the circulation, the weight of the rock debris in the metering section in each transmission metering period is acquired;

the method comprises the following steps that a refresh frequency of a weighing component during weighing data collection is 1 second, and when the end time of any one transmission metering period is an integer of seconds, the weighing data corresponding to the end time is taken as the weight of rock debris in a metering section in the next transmission metering period; when the ending time of any one transmission metering period is non-integer seconds, respectively recording weighing data corresponding to two adjacent integers at the ending time, and calculating the weight of rock debris in a metering section in the next transmission metering period according to the weighing data corresponding to the two adjacent integers at the moment;

step S33: and after weighing is finished, summing the weight of the rock debris collected in each transmission metering period to obtain the amount of the returned rock debris.

In step S11, setting the length of the metering section as L, the pitch of the screw shaft in the metering section as m, and the rotation speed of the screw shaft per minute as r, the transmission metering period of the rock debris through the metering section is:

t=60L/m*r （6）

in the formula (6), t is the transmission metering period of the rock debris through the metering section.

In step S22, the weight of the rock debris in the measuring section in any one transmission measuring period n is set to be G_{Measuring period}If the starting time of any transmission metering cycle n is T and the ending time is T-:

t~=（T+n*t）（7）

in the formula (7), when t-is integer seconds, the weighing data collected by the weighing component at t-moment is taken as the rock debris weight G in the metering section in the next transmission metering period_{Measuring period}；

When t is a non-integer second, setting two integers adjacent to t as t to_-And t to₊，t~_-Time and t ~₊The weighing data collected by the weighing component at any moment are respectively G_-And G₊Then the weight G of the rock debris in the metering section in the next transmission metering period is measured_{Measuring period}Comprises the following steps:

G_{measuring period}=（T+n*t-t~_-）* G_-+（t~₊-T-n*t）*G₊ （8）。

The sealing flexible connection means that the feeding section and the metering section are hermetically connected with each other and the metering section and the discharging section are hermetically connected with each other by adopting flexible rubber materials.

The flexible rubber material is a rubber sleeve made of oil-resistant and high-temperature-resistant hydrogenated butadiene-acrylonitrile rubber.

The screw pitch of the screw shaft in the feeding section is larger than that of the screw shaft in the metering section.

The screw pitch of the screw shaft in the feeding section is 1.5 times that of the screw shaft in the metering section.

The weighing assembly comprises a plurality of weight sensors, and the weight sensors are symmetrically fixed at the lower parts of the two ends of the metering section respectively; during measurement, the weight of the rock debris collected by the weighing component is the sum of the weighing data measured by each weight sensor.

The quantity of the weight sensors is four, and the four weight sensors are respectively fixed on the lower parts of two ends of the metering section in pairwise symmetry.

The conveying cylinder is fixed on the support, and the weighing assembly is fixed between the conveying cylinder and the support.

By adopting the technical scheme, the invention has the beneficial technical effects that:

1. when the method is implemented, the cleanliness of the well hole is determined according to the theoretical rock debris volume and the actual rock debris volume, and then the cleaning and quantitative evaluation is carried out on the well hole according to the cleanliness of the well hole.

2. When the theoretical volume of the cuttings is calculated, the theoretical borehole diameter obtained by adjacent borehole electrical measurement data can be adopted for calculation, the actual measurement borehole diameter obtained by a while-drilling system can be adopted for calculation, and the corrected borehole diameter obtained according to the theoretical borehole diameter and the actual measurement borehole diameter can be adopted for calculation. Different calculation modes not only meet different well conditions, but also are beneficial to improving the accuracy of the calculation result. Particularly, when the actual measurement hole diameter obtained by a while-drilling system is adopted for calculation, theoretical rock debris and underground conditions can be identified more accurately.

3. According to the method, the well cleanliness is quantitatively evaluated according to the set evaluation threshold, and the accuracy of the evaluation result is improved.

4. According to the invention, the correction coefficient is introduced when the actual volume of the rock debris is calculated, and the calculation result can be dynamically corrected through the correction coefficient, so that a specific flow of rock debris drying is not required, and the operation is more convenient.

5. The invention relates to the amount of returned rock debris, and one of the modes is to obtain the amount of returned rock debris by adopting a mode that two material receiving containers rotate circularly between a material receiving station and a station to be received. The mode can rapidly rotate the other empty receiving container to the receiving station for weighing at the end of the last rotation period, and compared with the prior art, the mode solves the technical problem that a single funnel groove in the existing weighing method cannot measure the continuously generated rock debris. In addition, the method starts to record the initial weight G1 of the receiving container at the initial receiving time, and records the current weight G2 of the receiving container at the end time of the rotation period, and the dynamic peeling method is adopted in calculation, so that the accumulated weighing error caused by the adhesion of rock debris can be avoided, and an accurate weighing result can be obtained.

6. The material receiving station and the station to be received are arranged in two modes, the first mode is that the material receiving station and the station to be received are respectively and symmetrically arranged above and below the vertical direction, and the second mode is that the material receiving station and the station to be received are respectively and symmetrically arranged on the left side and the right side of the same transverse plane.

Furthermore, based on the two different setting modes of the material receiving station and the station to be received, the material receiving device disclosed by the invention respectively adopts two different structures aiming at the rotating mechanism, the metering assembly and the material receiving container, and has the advantages that the material receiving device can be more suitable for the change of materials, the equipment cannot work abnormally no matter what form the materials are, the metering algorithm is simpler, and the metering result is more accurate.

7. The invention relates to the amount of returned rock debris, and the second mode is to obtain the amount of returned rock debris by using a screw conveyor to weigh in real time in the conveying process. The mode has lower requirement on installation space and more economical cost. And for the existing common spiral conveying type weighing mode, the mode changes the vertical mode feeding and discharging of the single spiral conveyor into the horizontal mode feeding and discharging, so that the feeding is more uniform, and the long-time dynamic metering is facilitated. In addition, this mode has set the feed cylinder to the syllogic structure including feeding section, measurement section and play material section, because adopt sealed flexible coupling between the three, be equivalent to the three and be the independent structure respectively, so the feeding of detritus is strikeed and can not be transmitted the measurement section of weighing in the middle of, and then can avoid the material to fall perpendicularly and strike the weighing error that arouses. Meanwhile, the three-section structure can also isolate the measurement error caused by the rotation of the screw shaft, so that the rock debris measurement precision is more accurate. And, because the rotation fulcrum of rotation axis sets up respectively in the feeding section and ejection of compact section, consequently the vibration of equipment operation, the adhesion of detritus on the rotation axis can not transmit the weighing and metering section, so can not influence the weighing and metering result. Compared with the prior art, the method improves the processing capacity of instantaneous large-amount feeding while ensuring the weighing precision.

8. The weighing module is used for further adjusting the weighing data acquired at the end moment of each transmission metering period in the weighing process, particularly, the weighing module has a certain time interval when acquiring the weighing data, and the time interval is usually 1 second in order to ensure the weighing precision. However, due to the practical structure and design reasons, the time data corresponding to the end time of each transmission metering period is not necessarily integer seconds, so that the technical problem of calculating which weighing data is taken exists, and the invention solves the technical problem by specifically limiting the step S22, so that the weighing precision of the rock debris can be further improved compared with the prior art.

9. The flexible rubber material is adopted for sealing connection between the feeding section and the metering section and between the metering section and the discharging section, and the flexible rubber material has the advantages that the metering sections are relatively independent, on one hand, the flexible rubber material is not influenced by feeding impact during weighing, on the other hand, the flexible rubber material is not influenced by adhesion of rock debris, and the weighing and metering accuracy is improved.

10. The screw pitch of the screw shaft in the feeding section is designed to be 1.5 times of that of the screw shaft in the metering section, and the screw pitch metering device has the advantage of improving the instantaneous feeding processing capacity.

11. The weighing device adopts the plurality of weight sensors as the weighing components for weighing, and has the advantages of more stable measurement and stronger random interference resistance.

12. The invention sets the number of the weight sensors as four, and the four weight sensors are respectively fixed at the lower parts of the two ends of the metering section in pairwise symmetry, and has the advantages that the metering section can be positioned on a stable weighing plane, so that the metering is more accurate.

13. The metering section of the invention has the capability of moving in a certain space, and when the material is excessive, the cylinder body can be extruded and shaken, thereby increasing the passing capability and reducing the probability of screw locking.

Drawings

FIG. 1 is a schematic flow diagram of the present invention;

FIG. 2 is a schematic flow chart of example 2;

FIG. 3 is a schematic plan view showing the structure of example 4;

FIG. 4 is a schematic perspective view of the preferred embodiment 4;

FIG. 5 is a schematic structural view of example 6;

FIG. 6 is a schematic structural view of example 8;

labeled as: 1. the material receiving container comprises a material receiving container body, 2, a support, 3, a rotating shaft, 4, servo motors I and 5, a weighing sensor, 6, a weighing tray, 7, a base, 8, a rotating frame, 9, servo motors II and 10, a connecting arm, 11, an electromagnet, 12, a magnetic attraction body, 13, a spiral shaft, 14, a weighing assembly, 15, a conveying cylinder, 16, a feeding section, 17, a metering section, 18, a discharging section, 19, an explosion-proof motor, 20, a feeding nozzle, 21, a discharging nozzle, 22 and a support.

Detailed Description

Example 1

The embodiment discloses a borehole cleaning quantitative evaluation method based on a rock debris return condition, which is characterized in that the accumulation condition of rock debris at the bottom of a well is judged by comparing the amount of rock debris returned from the ground in the drilling process with the amount of rock debris theoretically generated at the bottom of the well, so that a basis is provided for the judgment of the form of a rock debris bed, the optimization of ground parameters is guided, and the operation risk is reduced. As shown in fig. 1, the method comprises the steps of:

step 1: and calculating the theoretical volume of the rock debris which can return to the ground underground according to the related data such as the borehole diameter, the borehole depth variation and the like.

The method for calculating the volume of the theoretical rock debris in the step comprises the following steps:

V_{theory of the invention}=pi*R²/4*ΔH （1）

Step 2: the method comprises the steps of obtaining the amount of returned rock debris which has returned to the ground in the drilling process and the amount of rock debris to be returned which is delayed to the ground after the drilling is stopped, obtaining the actual amount of the rock debris which can return to the ground according to the amount of the returned rock debris and the amount of the rock debris to be returned, and obtaining the actual volume of the rock debris which can actually return to the ground according to the actual amount of the rock debris.

The calculation method of the actual volume of the rock debris in the step comprises the following steps:

V_{practice of}=G_{Practice of}/p （2）

Wherein the content of the first and second substances,

G_{actual =} G_{Has returned out}+G_{To be returned out} （3）

p=G_{Practice of}/V_{Theory of the invention} （4）

In formulae (2) to (4), V_{Practice of}Actual volume of rock debris, G_{Practice of}For the actual amount of rock debris, G_{Has returned out}Amount of returned rock debris, G_{To be returned out}P is a correction factor (equivalent to an equivalent density) for the amount of rock debris to be returned.

It should be noted that the amount of the rock debris to be returned to the surface after the delay is the amount of the rock debris remaining in the borehole after the drilling is stopped. Since the transportation of the debris from the bottom of the well to the surface takes a certain time, which is the late time that can be obtained by the logging system, the amount of the partial debris is the amount that will return to the surface in the late time. Specifically, if the late time is set as t, the well depth H before the time t is traced back, and the well depth at the current time is H, the amount of the rock debris to be returned to the ground after the late time = pi × R²/4*（H-h）。

The method for calculating the cleanliness of the well hole in the step comprises the following steps:

In formula (5), A represents the borehole cleanliness.

Further, the method for quantitatively evaluating the cleanliness of the well according to the cleanliness of the well comprises the following steps: setting an evaluation threshold, and when the cleanliness of the well is smaller than the evaluation threshold, indicating that underground rock debris is difficult to return and a rock debris bed exists; when the cleanliness of the well is greater than the evaluation threshold value, the borehole wall is shown to be unstable and collapse; and when the well cleanliness is within the evaluation threshold range, the well cleanliness is good, and the downhole condition is normal. Wherein, the evaluation threshold value can be set to be 90-110%, when the cleanliness of the well hole is less than 90%, the underground cuttings are difficult to return, and a cuttings bed exists; when the cleanliness of the well is more than 110%, the borehole wall is unstable and collapses; when the well cleanliness is in the range of 90% -110%, the well cleanliness is good and the downhole condition is normal.

Example 2

On the basis of embodiment 1, this embodiment further defines the method for obtaining the amount of the returned rock debris. The method for obtaining the rock debris based on the double receiving containers 1 can weigh the rock debris periodically and circularly, and can dynamically remove the skin during weighing, so that the technical problem that the rock debris continuously generated in the overturning process cannot be measured by a single funnel groove is solved, and the technical problem of accumulated weighing errors caused by the adhesion of the rock debris is also solved. As shown in fig. 2, the method for obtaining the amount of returned rock debris includes the following steps:

step S1: the method comprises the steps that a material receiving station and a station to be received are preset at the outlet of a vibrating screen of rock debris, when weighing is started, a rotating mechanism controls two material receiving containers 1 to rotate between the material receiving station and the station to be received in a circulating mode according to a rotation period, and when one material receiving container 1 rotates to the material receiving station, the other material receiving container 1 is just located at the station to be received.

Step S2: obtain to be located through measurement component and connect material that connects on material stationThe initial weight G1 of the container 1 at the initial receiving time, and the current weight G2 of the receiving container 1 at the end time of the current rotation period are obtained through a metering assembly, and then the rock debris amount G conveyed in the current rotation period is calculated according to the current weight G2 and the initial weight G1_{Period of rotation}。

It should be noted in this step that the initial weight G1 of the material receiving container 1 may be obtained by the weighing component 14 when the material receiving container 1 rotates to the station to be received, or may be obtained by the weighing component 14 when the material receiving container 1 just rotates to the material receiving station and starts to receive material, and a reasonable obtaining manner is specifically selected according to actual needs.

Step S3: taking the end time of the previous rotation period as the start time of the next rotation period, controlling the two material receiving containers 1 to rotate by the rotating mechanism, controlling the rock debris to be separated from the material receiving containers 1 in the rotating process, and repeating the step 2 to calculate the rock debris amount G conveyed in the current rotation period after the two material receiving containers 1 are mutually replaced_{Period of rotation}。

The realization of this embodiment is realized based on controller unified control, and is concrete, slewing mechanism and measurement subassembly all are connected with the controller, the controller is used for controlling slewing mechanism on the one hand and rotates, and on the other hand is used for receiving the data that the measurement subassembly acquireed to the volume of rock debris has been returned according to the data calculation that acquirees.

In the present embodiment, when actually weighing, the rotation period is set according to time or the weight of the rock debris in the receiving container 1, for example, 10s may be set as one rotation period, or 10s may be set as one rotation period when the weighing data reaches a set threshold. The time from the material receiving station/station to the station/station is determined mainly according to the rotation speed of the motor, for example, when the rotation speed of the rotating mechanism is 1450r/min, the rotating mechanism is directly driven without a speed reducer, and the time of 180 degrees rotation is about 1/48 s.

Example 3

On the basis of embodiment 2, this embodiment has still further prescribed a limit to the position of material receiving station and waiting to receive the station, specifically, material receiving station and waiting to receive the station respectively the symmetry setting in vertical direction's top and below, and preferred material receiving station is located and waits to receive the station directly over. Under the condition, the rotating mechanism controls the two material receiving containers 1 to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers 1 to rotate circularly up and down in the vertical direction, so that the circular weighing of rock debris is realized, and the rock debris is separated from the material receiving containers 1 when the rock debris rotates.

Example 4

On the basis of embodiment 3, the present embodiment further defines the rotating mechanism, the receiving container 1, and the metering assembly. As shown in fig. 3 and 4, the rotating mechanism includes a support 2, a rotating shaft 3 and a first servo motor 4, two ends of the rotating shaft 3 are respectively installed on the support 2 through bearings, a power shaft of the first servo motor 4 is fixedly connected with the rotating shaft 3, and the first servo motor 4 can drive the rotating shaft 3 to rotate on the support 2. The measuring components are symmetrically fixed on the rotating shaft 3, the material receiving containers 1 are respectively fixed on the measuring components, and the material receiving containers 1 and the support 2 are not directly connected, so that the rock debris can be accurately measured. When weighing, the servo motor I4 controls the two material receiving containers 1 to circularly rotate between the material receiving station and the station to be received through the rotating shaft 3.

The embodiment further defines the material receiving container 1, preferably, the material receiving container 1 is a trough with an inverted trapezoid cross section, the trough is provided with an opening at the upper end and has a larger caliber, and rock debris can accurately fall into the material receiving container 1 during weighing.

The embodiment further defines the metering assembly, preferably, the metering assembly includes a plurality of weighing sensors 5 all fixed on the support 2, the weighing sensors 5 are respectively and symmetrically arranged at two ends of the bottom of the material receiving container 1, and when the material receiving container 1 is located at the material receiving station, the material receiving station is kept in a horizontal state.

Further, in order to accurately measure the weight of the rock debris under the condition of keeping reasonable cost, the number of the weighing sensors 5 is preferably four, and the four weighing sensors 5 are symmetrically arranged at two ends of the material receiving container 1 in pairs respectively. During measurement, the data acquired by the metering assembly is the sum of the data measured by each weighing sensor 5.

Example 5

On the basis of embodiment 2, this embodiment has still further made the position of material receiving station and waiting to connect the station and has further injectd, specifically, material receiving station and waiting to connect the station respectively the symmetry set up in the left and right sides of same transverse plane. Under the condition, the rotating mechanism controls the two material receiving containers 1 to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers 1 to rotate circularly left and right on the same transverse plane, so that the circular weighing of the rock debris is realized, and the rock debris is separated from the material receiving containers 1 when the rock debris rotates.

Example 6

On the basis of embodiment 5, the present embodiment further defines the rotating mechanism, the receiving container 1, and the metering assembly. As shown in figure 5 of the drawings,

the metering components are weighing trays 6 respectively fixed on the material receiving station and the station to be received, a spacing adsorption fixing mechanism is arranged between the rotating mechanism and the material receiving container 1, and when the rotating mechanism controls the material receiving container 1 to start rotating, the rotating mechanism is fixedly connected with the material receiving container 1 through the spacing adsorption fixing mechanism; when the rotating mechanism controls the material receiving container 1 to reach the material receiving station and the station to be received, the rotating mechanism is disconnected from the material receiving container 1, and the material receiving container 1 respectively stops on the weighing tray 6. The two weighing trays 6 are respectively used for acquiring the initial weight G1 of the receiving container 1 at the receiving initial time and the current weight G2 of the receiving container 1, specifically, the weighing tray 6 located on the receiving station is used for acquiring the initial weight G1 of the receiving container 1 at the receiving initial time, and the weighing tray 6 located on the receiving station is used for acquiring the current weight G2 of the receiving container 1. In the practical measurement, the material receiving container 1 is combined with the weighing tray 6 to receive the rock debris, namely the weighing tray 6 is used for receiving the rock debris, and the material receiving container 1 is used for limiting the rock debris on the weighing tray 6.

The embodiment further defines the rotating mechanism, the receiving container 1 and the interval adsorption fixing mechanism, and specifically comprises the following steps:

the rotating mechanism comprises a base 7, a rotating frame 8 and a second servo motor 9, wherein the base 7 is provided with a base body and an upward protruding portion, the protruding portion is integrally formed on the base body, a mounting area is arranged in the middle of the protruding portion, and the servo motor is fixed on the base 7 through the mounting area. The rotating frame 8 comprises a supporting plate and two connecting arms 10, the connecting arms 10 are of an L-shaped structure, the two connecting arms 10 are symmetrically fixed on two sides of the tray, and the supporting plate is movably arranged above the protruding portion through a positioning shaft. And a power shaft of the second servo motor 9 is connected with the supporting plate, and the second servo motor 9 can drive the rotating frame 8 to rotate on the base 7. The interval adsorption fixing mechanism is arranged between the connecting arm 10 and the material receiving container 1.

Further, the interval adsorption fixing mechanism comprises an electromagnet 11 and a magnetic attraction body 12 matched with the electromagnet 11, the electromagnet 11 is fixed on the connecting arm 10, the magnetic attraction body 12 is fixed on the material receiving container 1, and the connection and disconnection of the rotating mechanism and the material receiving container 1 can be realized by controlling the on-off state of the electromagnet 11. In this case, the power supply of the electromagnet 11 can be effected by rotating the brush, since the turret 8 is rotated during weighing. The magnetic attraction body 12 is not limited in specific shape and arrangement manner in the receiving container 1, and is preferably capable of being effectively controlled by a rotating mechanism. In addition, the power of the electromagnet 11 needs to be more than 300W to ensure stable weighing.

The material receiving container 1 is a hollow cylinder, and it should be noted that when the material receiving container 1 is fixedly connected with the rotating mechanism through the interval adsorption fixing mechanism, a gap between the bottom of the material receiving container 1 and the upper surface of the weighing tray 6 is less than 1mm, the gap ensures that the material receiving container 1 can smoothly rotate to the position above the station under the driving of the rotating mechanism, and on the other hand, the rock debris can be conveniently driven to separate from the weighing tray 6.

In the embodiment, when weighing, the interval adsorption fixing mechanism is firstly controlled to be electrified, and at the moment, the electromagnet 11 generates adsorption force to adsorb the material receiving container 1 to the rotating frame 8 through the magnetic attraction body 12. Then the rotating mechanism controls the material receiving container 1 to rotate, so that the two material receiving containers 1 are respectively positioned above the material receiving station and the station to be received, and the interval adsorption fixing mechanism is controlled to be powered off to ensure that the material receiving containers are connectedThe device 1 respectively stops at the material receiving station and the station to be received, and at the moment, the initial weight G1 of the material receiving container 1 at the initial material receiving moment can be respectively obtained through the two weighing trays 6. Then, at the end time of the current rotation period, the current weight G2 of the receiving container 1 on the receiving station can be obtained through the weighing tray 6 on the receiving station, and then the rock debris amount G conveyed in the current rotation period is calculated according to the current weight G2 and the initial weight G1_{Period of rotation}. The rock debris amount G conveyed in other rotation periods can be obtained by repeating the procedures_{Period of rotation}. In the process, the material receiving container 1 is a hollow cylinder, and the gap between the material receiving container 1 and the upper surface of the weighing tray 6 is very small, so that when the material receiving container 1 is controlled to rotate, the material receiving container 1 can drive rock debris on the weighing tray 6 to separate, and the metering of the next rotation period is facilitated.

Example 7

The present embodiment mainly verifies that the method for obtaining the amount of the returned rock debris described in embodiments 2 to 6 is applied to a certain well in germany, the metering assembly adopts C3-grade precision, with an error of 0.1%, and after 10-day field tests, the cumulative metering weight is 14678kg, while the actual weighing weight of the returned rock debris is 14613kg, in contrast, the error is only 0.44%, and the calculation results are substantially consistent. Therefore, the accurate amount of the returned rock debris can be obtained by adopting the specific method, and the accuracy of the evaluation result can be improved.

Example 8

On the basis of embodiment 1, this embodiment further defines the method for obtaining the amount of the returned rock debris. As shown in fig. 6, the amount of the returned rock debris is obtained by weighing the spiral conveyor, the spiral conveyor comprises a support 22, an explosion-proof motor 19, a spiral shaft 13, a weighing assembly 14 and a conveying cylinder 15, the conveying cylinder 15 comprises a feeding section 16, a metering section 17 and a discharging section 18 which are sequentially in sealed flexible connection, namely, flexible connection structures are respectively arranged between the feeding section 16 and the metering section 17 and between the metering section 17 and the discharging section 18, the connection positions are in a sealed state, and the feeding section 16, the metering section 17 and the discharging section 18 are relatively independent after connection. In addition, a feeding nozzle 20 is arranged at the upper part of the feeding section 16, a discharging nozzle 21 is arranged at the lower part of the discharging section 18, and the discharging nozzle 21 is close to the joint of the metering section 17 and the discharging section 18. The screw shaft 13 is rotatably arranged in the conveying cylinder 15 for conveying rock debris, and two ends of the screw shaft 13 are respectively arranged in the feeding section 16 and the discharging section 18 through bearings. The explosion-proof motor 19 is arranged at the end part of the feeding section 16, and the explosion-proof motor 19 is connected with the screw shaft 13 and used for driving the screw shaft 13 to rotate. The delivery cylinder 15 is fixed to a support 22, and for accurate metering, it is preferable that the feed section 16 and the discharge section 18 are respectively fixed to the support 22. The weighing assembly 14 is fixedly connected below the metering section 17 through a bracket 22 and is used for weighing the weight of the rock debris in the metering section 17.

In this embodiment, the total length of the screw shaft 13 is preferably 2.2 meters, the diameter of the rotating vane of the screw shaft 13 is preferably 160mm, the length of the screw shaft 13 in the metering section 17 is preferably 1280mm, the rotating speed of the screw shaft 13 is preferably 100r/min, the power of the explosion-proof motor 19 is preferably 2.2Kw, the rated range of the weighing module 14 is preferably 200kg, the metering accuracy is preferably 0.01%, and the rated throughput of the whole screw conveyor is not lower than 12 mth/h.

Based on the spiral conveyor, the method for acquiring the amount of the returned rock debris comprises the following steps:

step S11: and calculating the transmission metering period of the rock debris passing through the metering section 17, wherein the transmission metering period of the rock debris passing through the metering section 17 means that the rock debris in the metering section 17 in the previous transmission metering period is just completely output when the next transmission metering period starts.

Specifically, the length of the metering section 17 is set to be L, the pitch of the screw shaft 13 in the metering section 17 is set to be m, and the rotation speed of the screw shaft 13 per minute is set to be r, so that the transmission metering period of the rock debris passing through the metering section 17 is as follows:

t=60L/m*r （6）

in equation (6), t is the measurement period for the transport of the rock debris through the measurement section 17.

Step S22: when weighing is started, firstly, the weighing component 14 collects the weight of rock debris in the metering section 17 in the current transmission metering period at the starting moment of the current transmission metering period, and then collects the weight of the rock debris in the metering section 17 in the next transmission metering period at the ending moment of the current transmission metering period (the ending moment of the current transmission metering period is the starting moment of the next transmission metering period); and circulating the steps, and acquiring the weight of the rock debris in the metering section 17 in each transmission metering period.

It should be noted that in this step, the refresh frequency when the weighing component 14 collects the weighing data is 1 second, and when the ending time of any one transmission metering cycle is an integer number of seconds, the weighing data corresponding to the ending time is taken as the rock debris weight in the metering section 17 in the next transmission metering cycle. For example, if the end time of the current transmission metering period is 13 o 'clock 30 min 19 sec, the weighing data collected by the weighing assembly 14 at 13 o' clock 30 min 19 sec is taken as the rock debris weight in the metering section 17 in the next transmission metering period.

When the ending time of any one transmission metering period is non-integer seconds, respectively recording weighing data corresponding to two adjacent integers at the ending time, and calculating the rock debris weight in the metering section 17 in the next transmission metering period according to the weighing data corresponding to the two adjacent integers at the moment. For example, if the end time of the current transmission metering period is 13 o' clock, 30 min, 19 sec and 20 ms, respectively recording two adjacent integers of 19 sec and 20 sec, corresponding weighing data, and calculating the weight of the rock debris in the metering section 17 in the next transmission metering period according to the two weighing data.

Further, the specific implementation method of the step is as follows:

setting the weight of the rock debris in the metering section 17 in any one transmission metering period n to be G_{Measuring period}If the starting time of any transmission metering cycle n is T and the ending time is T-:

t~=（T+n*t）（7）

in the formula (7), when t-is integer seconds, the weighing data collected by the weighing component 14 at t-moment is taken as the rock debris weight G in the metering section 17 in the next transmission metering period_{Measuring period}。

When t is a non-integer second, setting two integers adjacent to t as t to_-And t to₊，t~_-Time and t ~₊Constantly weighingThe weighing data collected by the assembly 14 are respectively G_-And G₊Then the weight G of the cuttings in the metering section 17 during the next transfer metering cycle is measured_{Measuring period}Comprises the following steps:

G_{measuring period}=（T+n*t-t~_-）* G_-+（t~₊-T-n*t）*G₊ （8）。

Example 9

On the basis of the embodiment 8, in order to further improve the accuracy of weighing and metering the rock debris, the present embodiment further defines the connection manner of the feeding section 16, the metering section 17 and the discharging section 18 in the conveying cylinder 15, as shown by the thick black line part in fig. 6, the flexible sealing connection means that the feeding section 16 and the metering section 17 and the discharging section 18 are both in sealing connection by using a flexible rubber material, and the flexible rubber material is a rubber sleeve made of oil-resistant and high-temperature-resistant hydrogenated nitrile rubber. During connection, two ends of the rubber sleeve are respectively sleeved on the feeding section 16 and the metering section 17 or respectively sleeved on the metering section 17 and the discharging section 18, and then the throat hoop is used for fixing. Under this specific connected mode, the feeding of detritus is strikeed and can not be transmitted the middle weighing section 17, can avoid the perpendicular whereabouts of material to strike the weighing error that arouses, can also keep apart screw axis 13 simultaneously and rotate the measuring error who brings, and then makes the detritus measurement accuracy more accurate.

Example 10

In addition to example 8 or example 9, the present example further defines the pitch of the screw shaft 13 in order to improve the instantaneous feeding capacity of the rock debris. Specifically, this embodiment sets the pitch of the screw shaft 13 in the feed section 16 to be larger than the pitch of the screw shaft 13 in the metering section 17, and preferably sets the pitch of the screw shaft 13 in the feed section 16 to be 1.5 times the pitch of the screw shaft 13 in the metering section 17. Further, in actual use, the screw pitch of the screw shaft 13 in the metering section 17 can be set to 160mm, and the screw pitch of the screw shaft 13 in the feeding section 16 can be set to 240 mm. Under the condition, the instantaneous feeding capacity of the spiral conveyor can reach 24 m/h.

Example 11

In addition to the embodiment 8, in order to further improve the accuracy of the rock debris weighing and metering, the weighing assembly 14 is further defined in the embodiment. Specifically, the weighing assembly 14 comprises a plurality of weight sensors, the rated range of a single weight sensor is preferably 50kg, and the plurality of weight sensors are symmetrically fixed at the lower parts of the two ends of the metering section 17 respectively. Preferably, the number of the weight sensors is four, the four weight sensors are respectively fixed on the lower parts of two ends of the metering section 17 in a pairwise symmetry manner, and the metering section 17 can be horizontally fixed on the four weight sensors. During measurement, the weight of the rock debris collected by the weighing assembly 14 is the sum of the weighing data measured by each weight sensor. Because the metering section 17 is positioned on a stable weighing plane, the metering can be more accurate.

Example 12

The embodiment mainly verifies the method for obtaining the amount of the returned rock debris in the embodiments 8 to 11, and the applicant applies the method to a certain well and weighs the underground returned rock debris, and the specific verification is as follows:

1. the length of the metering section 17 of the screw conveyor is 280mm, the screw pitch of the screw shaft 13 in the metering section 17 is 160mm, and the rotating speed of the screw shaft 13 is 130 r/min. Under this condition, the measurement cycle for the transport of the cuttings through the measurement section 17 is:

t=60L/m*r=3.69s。

2. and during the test, the data measurement and transmission of each weighing sensor 5 are normal, the online metering and conveying of the returned rock debris are realized, the spiral conveyor continuously operates for 240 hours without faults, wherein the spiral conveyor continuously operates for 168 hours under the drilling working condition, and the test period is nearly 17 tens of thousands. By adopting the method, the accumulated rock debris conveying amount obtained by metering is 52.8m, compared with 53m high-speed plantation in the clean production rock debris metering tank, the error is only 0.37%, and the metering result is basically consistent. And moreover, the situations of rock debris leakage, equipment blockage and the like do not occur during the test operation, the online rock debris metering is stable, and the on-site normal drilling rock debris conveying requirement is met. Therefore, compared with the prior art, the method improves the processing capacity of instantaneous large-amount feeding while ensuring the weighing precision, thereby proving that the accurate amount of returned rock debris can be obtained by adopting the method, and further improving the accuracy of the evaluation result.

While the invention has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.

Claims

1. A borehole cleaning quantitative evaluation method based on debris return condition is characterized by comprising the following steps:

2. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 1, wherein the method comprises the following steps: the calculation method of the theoretical rock debris volume comprises the following steps:

V_{theory of the invention}=pi*R²/4*ΔH （1）

3. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 2, wherein the method comprises the following steps: the calculation method of the actual volume of the rock debris comprises the following steps:

V_{practice of}=G_{Practice of}/p （2）

Wherein the content of the first and second substances,

G_{actual =} G_{Has returned out}+G_{To be returned out} （3）

p=G_{Practice of}/V_{Theory of the invention} （4）

4. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 3, wherein the method comprises the following steps: the calculation method of the well cleanliness comprises the following steps:

In formula (5), A represents the borehole cleanliness.

5. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 1, wherein the method comprises the following steps: the method for quantitatively evaluating the cleanness of the well according to the cleanliness of the well comprises the following steps: setting an evaluation threshold, and when the cleanliness of the well is smaller than the evaluation threshold, indicating that underground rock debris is difficult to return and a rock debris bed exists; when the cleanliness of the well is greater than the evaluation threshold value, the borehole wall is shown to be unstable and collapse; and when the well cleanliness is within the evaluation threshold range, the well cleanliness is good, and the downhole condition is normal.

6. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 1, wherein the method comprises the following steps: the amount of the rock debris to be returned to the ground after the drilling is stopped is the amount of the rock debris remained in the well hole.

7. The method for quantitatively evaluating the cleaning of the well hole based on the return-out condition of the rock debris as recited in any one of claims 1-6, wherein: the method for acquiring the amount of the returned rock debris comprises the following steps:

step S1: when weighing is started, the rotating mechanism controls the two material receiving containers (1) to rotate between the material receiving station and the station to be received according to the rotating period, and when one material receiving container (1) rotates to the material receiving station, the other material receiving container (1) is just positioned at the station to be received;

step S2: the method comprises the steps of obtaining the initial weight G1 of a material receiving container (1) positioned on a material receiving station at the initial material receiving time through a metering component, obtaining the current weight G2 of the material receiving container (1) through the metering component at the end time of the current rotation period, and calculating the rock debris amount G conveyed in the current rotation period according to the current weight G2 and the initial weight G1_{Period of rotation}；

Step S3: taking the end time of the previous rotation period as the start time of the next rotation period, controlling the two material receiving containers (1) to rotate by the rotating mechanism, controlling the rock debris to be separated from the material receiving containers (1) in the rotating process, and repeating the step 2 to calculate the rock debris amount G conveyed in the current rotation period after the two material receiving containers (1) exchange positions_{Period of rotation}；

8. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 7, wherein: the material receiving station and the station to be received are respectively and symmetrically arranged above and below the vertical direction, and the rotating mechanism controls the two material receiving containers (1) to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers (1) to turn circularly up and down in the vertical direction.

9. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 8, wherein: the rotating mechanism comprises a support (2), a rotating shaft (3) and a first servo motor (4), two ends of the rotating shaft (3) are respectively installed on the support (2) through bearings, and a power shaft of the first servo motor (4) is fixedly connected with the rotating shaft (3); the metering components are symmetrically fixed on the rotating shaft (3), and the material receiving containers (1) are respectively fixed on the metering components; the servo motor I (4) controls the two material receiving containers (1) to rotate circularly between the material receiving station and the station to be received through the rotating shaft (3).

10. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 9, wherein: the metering assembly comprises a plurality of weighing sensors (5), and the weighing sensors (5) are respectively and symmetrically arranged at two ends of the bottom of the material receiving container (1); during measurement, the data acquired by the metering assembly is the sum of the data measured by each weighing sensor (5).

11. The method for quantitatively evaluating the cleaning of the well bore based on the back-out condition of the rock debris as claimed in claim 7, wherein: the material receiving station and the station to be received are symmetrically arranged on the left side and the right side of the same transverse plane respectively, and the rotating mechanism controls the two material receiving containers (1) to rotate circularly between the material receiving station and the station to be received, namely controls the two material receiving containers (1) to rotate circularly left and right on the same transverse plane.

12. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 11, wherein: the metering assembly is a weighing tray (6) which is respectively fixed on the material receiving station and the station to be received, a spacing adsorption fixing mechanism is arranged between the rotating mechanism and the material receiving container (1), and when the rotating mechanism controls the material receiving container (1) to start rotating, the rotating mechanism is fixedly connected with the material receiving container (1) through the spacing adsorption fixing mechanism; when the rotating mechanism controls the material receiving container (1) to reach the material receiving station and the station to be received, the rotating mechanism is disconnected with the material receiving container (1), and the material receiving container (1) respectively stops on the weighing tray (6).

13. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 12, wherein: the rotating mechanism comprises a base (7), a rotating frame (8) and a servo motor II (9), the middle of the rotating frame (8) is movably arranged on the base (7), the servo motor II (9) is fixed on the base (7) and can drive the rotating frame (8) to rotate, connecting arms (10) are respectively arranged on two sides of the rotating frame (8), and the interval adsorption fixing mechanism is arranged between the connecting arms (10) and the material receiving container (1).

14. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 13, wherein: the interval adsorption fixing mechanism comprises an electromagnet (11) and a magnetic attraction body (12) matched with the electromagnet (11), the electromagnet (11) is fixed on the connecting arm (10), and the magnetic attraction body (12) is fixed on the material receiving container (1).

15. The method for quantitatively evaluating the cleaning of the well hole based on the return-out condition of the rock debris as recited in any one of claims 1-6, wherein: the returned rock debris amount is obtained by weighing the spiral conveyor, wherein the spiral conveyor comprises a spiral shaft (13), a weighing component (14) and a conveying cylinder (15), the conveying cylinder (15) comprises a feeding section (16), a metering section (17) and a discharging section (18) which are sequentially sealed and flexibly connected, the spiral shaft (13) is rotatably arranged in the conveying cylinder (15), two ends of the spiral shaft (13) are respectively arranged in the feeding section (16) and the discharging section (18) through bearings, and the weighing component (14) is fixedly connected below the metering section (17);

step S11: calculating the transmission metering period of the rock debris passing through the metering section (17), wherein the transmission metering period of the rock debris passing through the metering section (17) means that the rock debris in the metering section (17) in the previous transmission metering period is just completely output when the next transmission metering period starts;

step S22: when weighing is started, firstly, the weight of rock debris in the metering section (17) in the current transmission metering period is collected at the starting moment of the current transmission metering period through the weighing component (14), and then the weight of the rock debris in the metering section (17) in the next transmission metering period is collected at the finishing moment of the current transmission metering period; according to the circulation, the weight of the rock debris in the metering section (17) in each transmission metering period is acquired;

the refreshing frequency of the weighing component (14) during weighing data acquisition is 1 second, and when the ending moment of any one transmission metering period is an integer number of seconds, the weighing data corresponding to the ending moment is taken as the weight of the rock debris in the metering section (17) in the next transmission metering period; when the ending time of any one transmission metering period is non-integer seconds, respectively recording weighing data corresponding to two adjacent integers at the ending time, and calculating the weight of rock debris in a metering section (17) in the next transmission metering period according to the weighing data corresponding to the two adjacent integers at the moment;

16. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 15, wherein: in step S11, the length of the metering section (17) is set to be L, the screw pitch of the screw shaft (13) in the metering section (17) is set to be m, the rotating speed of the screw shaft (13) per minute is set to be r, and then the transmission metering period of the rock debris passing through the metering section (17) is as follows:

t=60L/m*r （6）

in the formula (6), t is the conveying and metering period of the rock debris through the metering section (17).

17. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 16, wherein: step by stepIn step S22, the weight of the rock debris in the measurement section (17) in any one measurement period n is set to G_{Measuring period}If the starting time of any transmission metering cycle n is T and the ending time is T-:

t~=（T+n*t）（7）

in the formula (7), when t-is integer seconds, weighing data collected by the weighing component (14) at t-moment is taken as the rock debris weight G in the metering section (17) in the next transmission metering period_{Measuring period}；

When t is a non-integer second, setting two integers adjacent to t as t to_-And t to₊，t~_-Time and t ~₊The weighing data collected by the moment weighing component (14) are respectively G_-And G₊The weight G of the rock debris in the metering section (17) in the next conveying and metering cycle_{Measuring period}Comprises the following steps:

G_{measuring period}=（T+n*t-t~_-）* G_-+（t~₊-T-n*t）*G₊ （8）。

18. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 15, wherein: the screw pitch of the screw shaft (13) in the feeding section (16) is 1.5 times that of the screw shaft (13) in the metering section (17).

19. The method for quantitatively evaluating the cleaning of the well bore based on the back-out of rock debris as claimed in claim 15, wherein: the weighing component (14) comprises a plurality of weight sensors which are symmetrically fixed at the lower parts of two ends of the metering section (17) respectively; when in measurement, the weight of the rock debris collected by the weighing component (14) is the sum of the weighing data measured by each weight sensor.