CN103485738B - A kind of horizontal well Cutting movement analogue experiment installation and experimental technique - Google Patents
A kind of horizontal well Cutting movement analogue experiment installation and experimental technique Download PDFInfo
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- 238000013508 migration Methods 0.000 claims abstract description 23
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Abstract
本发明涉及用于模拟石油钻井、煤层气钻井的一种水平井岩屑运移模拟实验装置及实验方法，该装置包括钻井液系统、岩屑运移系统、岩屑供给系统、动力系统、数据处理系统和岩屑回收系统。钻井液系统由储液池、电机、离心泵、流量计、蝶阀连接组成，岩屑运移系统由转换接头、玻璃管、PVC管、携岩工具和偏心三角盘等构成，岩屑供给系统由螺旋送料器和加岩屑装置组成，动力系统由调速电机、变速齿轮组成，岩屑回收系统由回收管、过滤器和岩屑回收池构成。使用本发明装置和方法可进行可视化的观察水平井岩屑运移情况，并可模拟不同排量、钻柱转速、钻柱与井眼间的偏心度、岩屑量及岩屑粒径对水平井岩屑运移规律的影响，实验台架简单实用、造价较低。
The invention relates to a horizontal well cuttings migration simulation experiment device and experimental method for simulating oil drilling and coalbed methane drilling. The device includes a drilling fluid system, a cuttings migration system, a cuttings supply system, a power system, Handling system and cuttings recovery system. The drilling fluid system is composed of a liquid storage tank, motor, centrifugal pump, flow meter, and butterfly valve connection. The cuttings transport system is composed of adapters, glass pipes, PVC pipes, rock carrying tools, and eccentric triangular disks. The cuttings supply system consists of The screw feeder is composed of a cuttings adding device, the power system is composed of a speed-adjusting motor and a speed change gear, and the cuttings recovery system is composed of a recovery pipe, a filter and a cuttings recovery pool. Using the device and method of the present invention can visually observe the cuttings migration in horizontal wells, and can simulate the impact of different displacements, drill string speeds, eccentricity between the drill string and the wellbore, cuttings volume, and cuttings particle size. Influenced by the law of cuttings migration in flat wells, the test bench is simple and practical, and the cost is low.
Description
技术领域technical field
本发明涉及用于模拟石油钻井、煤层气钻井的实验装置及实验方法，该实验装置可进行可视化观察的一种水平井岩屑运移模拟实验装置及实验方法。The invention relates to an experimental device and an experimental method for simulating oil drilling and coalbed methane drilling. The experimental device can perform visual observation on a horizontal well cuttings migration simulation experimental device and an experimental method.
背景技术Background technique
在石油、煤层气钻采过程中，为有效增大油气层的裸露面积、提高采收率、提高单井产能、提高单井控制面积，实现“少井高产”，常使用水平井钻井技术。水平井为井斜角达到或接近90°，井身沿着水平方向钻进一定长度的井，有时为了某种特殊的需要，井斜角超过90°，这为水平井岩屑的运移带来了技术难题。水平井因其优点而在石油、煤层气钻井中得到了广泛的应用，同时因水平井携岩等问题而制约着水平井钻井技术的发展。In the process of oil and coalbed methane drilling and production, in order to effectively increase the exposed area of oil and gas layers, improve recovery, increase single well productivity, increase single well control area, and achieve "high production with fewer wells", horizontal well drilling technology is often used. A horizontal well is a well whose inclination reaches or approaches 90°, and the well body is drilled along the horizontal direction for a certain length of well. Sometimes, for some special needs, the inclination exceeds 90°. This is the cuttings migration zone of the horizontal well. Here comes the technical difficulty. Because of its advantages, horizontal wells have been widely used in oil and coalbed methane drilling. At the same time, the development of horizontal well drilling technology is restricted by the problems of rock carrying in horizontal wells.
由于钻柱重力的原因使得钻柱平躺在水平段下井壁，形成偏心环空，在钻杆接头等过渡段极易导致岩屑沉降堆积，岩屑堆积过多则形成岩屑床。环空岩屑堆积易于造成钻柱高扭矩和高阻力，粘附卡钻，造成下套管和固井困难，钻具磨损大，测井仪器下井难等问题。如四川地区某水平井由于携砂不畅，井下岩屑堆积成床，造成钻具卡死，致使填井后侧钻。为防止上述事故的发生，弄清水平井岩屑运移机理及如何防止岩屑堆积成床已成为亟需解决的技术难题。Due to the gravity of the drill string, the drill string lies flat on the lower well wall of the horizontal section, forming an eccentric annulus, which can easily lead to sedimentation and accumulation of cuttings in transition sections such as drill pipe joints. Excessive accumulation of cuttings will form a cuttings bed. The accumulation of cuttings in the annulus is likely to cause high torque and high resistance of the drill string, sticking and sticking, causing difficulties in running casing and cementing, large wear of drilling tools, and difficulty in running logging tools. For example, in a horizontal well in Sichuan area, due to poor sand-carrying, downhole cuttings accumulated into a bed, causing the drilling tool to be stuck, resulting in sidetracking after filling. In order to prevent the above-mentioned accidents, it has become an urgent technical problem to find out the mechanism of cuttings migration in horizontal wells and how to prevent cuttings from accumulating into a bed.
因此，急需一种能模拟，并能可视化观察水平井岩屑运移规律的实验装置。该装置包括钻井液系统、岩屑运移系统、岩屑供给系统、动力系统、数据处理系统和岩屑回收系统。使用该实验装置和方法可定性研究不同钻杆转速、钻屑量、流量、钻杆偏心度和岩屑直径条件下的钻井液携岩问题；使用该实验装置和方法可进行可视化的观察水平井岩屑运移规律，将为解决水平井携岩问题提供可靠的依据。Therefore, there is an urgent need for an experimental device that can simulate and visualize the movement of cuttings in horizontal wells. The device includes a drilling fluid system, a cuttings transport system, a cuttings supply system, a power system, a data processing system and a cuttings recovery system. The experimental device and method can be used to qualitatively study the rock-carrying problem of drilling fluid under the conditions of different drill pipe speed, cuttings volume, flow rate, drill pipe eccentricity and cuttings diameter; the experimental device and method can be used to visually observe horizontal wells The law of cuttings migration will provide a reliable basis for solving the problem of rock carrying in horizontal wells.
发明内容Contents of the invention
本发明的目的是：为克服现有技术的不足，特提供一种可进行可视化观察和模拟多种工况的水平井岩屑运移模拟实验装置及实验方法。The object of the present invention is: to overcome the deficiencies of the prior art, to provide a horizontal well cuttings migration simulation experimental device and experimental method which can carry out visual observation and simulation of various working conditions.
为达到上述目的，本发明解决此问题所采用的技术方案是：一种水平井岩屑运移模拟实验装置及实验方法，包括钻井液系统、岩屑运移系统、岩屑供给系统、动力系统、数据处理系统和岩屑回收系统。其特征在于：所述钻井液系统由储液池、出口截止阀、电机、离心泵、压力表、流量计、蝶阀和钢丝管依次连接组成，所述岩屑运移系统由转换接头、密封轴承、玻璃管、通孔法兰盘、轴承、PVC管、PVC管接头、携岩工具、偏心三角盘、盲板和支撑架构成，所述岩屑供给系统由螺旋送料器和加岩屑装置组成，所述动力系统由调速电机、变速齿轮和固定架组成，所述数据处理系统由高速摄像机、三脚架和计算机组成，所述岩屑回收系统由回收管、过滤器、岩屑回收池和截止阀依次连接组成，回收管与玻璃管出口端连接。In order to achieve the above purpose, the technical solution adopted by the present invention to solve this problem is: a horizontal well cuttings migration simulation experiment device and experimental method, including drilling fluid system, cuttings migration system, cuttings supply system, power system , data processing system and cuttings recovery system. It is characterized in that: the drilling fluid system is composed of a liquid storage tank, an outlet stop valve, a motor, a centrifugal pump, a pressure gauge, a flow meter, a butterfly valve and a steel wire pipe; , glass tube, through-hole flange, bearing, PVC pipe, PVC pipe joint, rock-carrying tool, eccentric triangular plate, blind plate and support frame. The cuttings supply system is composed of a screw feeder and a cuttings adding device. The power system is composed of a speed regulating motor, a variable speed gear and a fixed frame. The data processing system is composed of a high-speed camera, a tripod and a computer. Connection composition, the recovery tube is connected with the outlet end of the glass tube.
所述转换接头小口端与钢丝管连接，转换接头大口端内部装有密封轴承，密封轴承通过过盈配合固定在PVC管最右端，用于防止钢丝管随PVC管的旋转而转动；所述玻璃管采用耐压、透明材料，可直接观测岩屑运移的过程，达到可视化的要求，玻璃管两端带有法兰结构，玻璃管之间通过螺栓连接，第二根玻璃管两端分别装有左压力表和右压力表，玻璃管内安装PVC管；所述加岩屑装置与螺旋送料器相连，通过控制加岩屑装置的加岩屑量，可达到模拟钻井产生的钻屑量；所述偏心三角盘为圆筒状，圆筒外焊有三个支架，每个支架之间角度为120°，偏心三角盘内安装PVC管，偏心三角盘与PVC管之间的间隙为2～3mm,通过控制支架的长度来实现偏心三角盘的偏心度。The small mouth end of the conversion joint is connected with the steel wire pipe, and the large mouth end of the conversion joint is equipped with a sealed bearing inside, and the sealed bearing is fixed on the rightmost end of the PVC pipe through interference fit, which is used to prevent the steel wire pipe from rotating with the rotation of the PVC pipe; the glass The tube is made of pressure-resistant and transparent material, which can directly observe the process of debris migration and meet the requirements of visualization. The two ends of the glass tube have flange structures, and the glass tubes are connected by bolts. The two ends of the second glass tube are respectively installed. There are a left pressure gauge and a right pressure gauge, and a PVC pipe is installed in the glass tube; the cuttings adding device is connected with the screw feeder, and by controlling the amount of cuttings added by the cuttings adding device, the amount of cuttings produced by simulating drilling can be achieved; The eccentric triangular disc is cylindrical, and there are three brackets welded on the outside of the cylinder. The angle between each bracket is 120°. The PVC pipe is installed in the eccentric triangular disc. The gap between the eccentric triangular disc and the PVC tube is 2-3mm. The eccentricity of the eccentric triangular disk is realized by controlling the length of the bracket.
使用上述装置模拟水平井岩屑运移的方法，主要包括以下步骤：The method for simulating the movement of cuttings in a horizontal well using the above-mentioned device mainly includes the following steps:
1)通过钻井液系统向PVC管提供钻井液，以模拟水平井井筒中的钻井液；1) Provide drilling fluid to the PVC pipe through the drilling fluid system to simulate the drilling fluid in the wellbore of the horizontal well;
2)通过控制加岩屑装置的加岩屑量，可达到模拟钻井产生的钻屑量，记录下左压力表读数、右压力表读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；2) By controlling the amount of cuttings added by the cuttings adding device, the amount of cuttings produced by simulating drilling can be achieved, and the readings of the left pressure gauge, the right pressure gauge, the amount of cuttings added, the weight and trajectory of cuttings in the filter can be recorded As well as the re-settling distance of the cuttings bed particles after starting, analyze the influence of different cuttings volumes on the rock-carrying effect and pressure drop;
3)调节钻井液排量，记录流量计读数，可达到模拟钻井液不同返速下携岩情况，并记录下左压力表读数、右压力表读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；3) Adjust the drilling fluid displacement and record the readings of the flowmeter, which can simulate the situation of rock carrying under different return speeds of the drilling fluid, and record the readings of the left pressure gauge, the right pressure gauge, the amount of cuttings added, and the amount of cuttings in the filter. The weight, trajectory, and the re-settling distance of the cuttings bed particles after starting to analyze the influence of different cuttings volumes on the rock-carrying effect and pressure drop;
4)通过更换不同的偏心三角盘来改变PVC管的偏心度，记录下左压力表读数、右压力表读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；4) Change the eccentricity of the PVC pipe by replacing different eccentric triangular discs, record the readings of the left pressure gauge, the right pressure gauge, the amount of cuttings added, the weight and trajectory of cuttings in the filter, and the particles in the cuttings bed after starting Re-subsidence distance to analyze the influence of different cuttings volumes on rock-carrying effect and pressure drop;
5)通过调节电机来改变PVC管的转速，记录下左压力表读数、右压力表读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；5) Change the speed of the PVC pipe by adjusting the motor, record the readings of the left pressure gauge, the right pressure gauge, the amount of cuttings added, the weight of cuttings in the filter, the trajectory, and the re-settling distance of the cuttings bed particles after starting, and analyze Effect of different cuttings volume on rock carrying effect and pressure drop;
6）记录未使用携岩工具时左压力表读数、右压力表读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响。6) Record the readings of the left and right pressure gauges, the amount of cuttings added, the weight and trajectory of the cuttings in the filter when the rock carrying tool is not used, and the re-settling distance of the cuttings bed particles after starting, and analyze the impact of different cuttings amounts on Effect of rock carrying effect and pressure drop.
本发明与现有技术相比，其有益效果是：1）可进行可视化的观察水平井岩屑运移情况；2）本实验装置可模拟不同排量、钻柱转速、钻柱与井眼间的偏心度、岩屑量及岩屑粒径对水平井岩屑运移规律的影响；3）可在钻柱上安装携岩工具，可模拟安装携岩工具和没有安装携岩工具时携岩的运移情况；4）使用高速摄像机可记录每个岩屑的运移情况，并用计算机对数据进行处理，实验结果准确；5）实验台架结构简单、造价较低，但可满足多种工况下实验的需求。Compared with the prior art, the present invention has the beneficial effects as follows: 1) It is possible to visually observe cuttings migration in horizontal wells; 2) This experimental device can simulate different displacements, drill string speeds, distance between drill string and borehole 3) Rock-carrying tools can be installed on the drill string, and rock-carrying tools can be simulated when rock-carrying tools are installed and when rock-carrying tools are not installed. 4) Using a high-speed camera to record the migration of each cuttings, and processing the data with a computer, the experimental results are accurate; 5) The experimental bench has a simple structure and low cost, but it can meet the needs of various industries. The needs of the experiment.
附图说明Description of drawings
图1为本发明一种水平井岩屑运移模拟实验装置的示意图；Fig. 1 is a schematic diagram of a horizontal well cuttings migration simulation experiment device of the present invention;
图2是图1中A处放大图；Figure 2 is an enlarged view of A in Figure 1;
图3是图1中B处放大图；Figure 3 is an enlarged view at B in Figure 1;
图4是图1中C处放大图。Fig. 4 is an enlarged view of point C in Fig. 1 .
图中：1.玻璃管，2.PVC管，3.左压力表，4.螺旋送料器，5.加岩屑装置，6.右压力表，7.PVC接头8.通孔法兰盘，9.轴承，10.变速齿轮，11.调速电机，12.钢丝管，13.转换接头14.蝶阀，15.流量计，16.压力表，17.离心泵，18.电机，19.出口截止阀，20.储液池，21.过滤器，22.岩屑回收池，23.密封轴承，24.固定架，25.玻璃管出口端，26.回收管，27.玻璃管加砂口，28.携岩工具，29.偏心三角盘，30.支撑架，31.盲板，32.截止阀，33.高速摄像机，34.三脚架，35.计算机。In the figure: 1. Glass tube, 2. PVC tube, 3. Left pressure gauge, 4. Screw feeder, 5. Cuttings adding device, 6. Right pressure gauge, 7. PVC joint, 8. Through-hole flange, 9. Bearing, 10. Variable speed gear, 11. Speed regulating motor, 12. Steel wire pipe, 13. Adapter 14. Butterfly valve, 15. Flow meter, 16. Pressure gauge, 17. Centrifugal pump, 18. Motor, 19. Outlet stop valve , 20. Liquid reservoir, 21. Filter, 22. Debris recovery tank, 23. Sealed bearing, 24. Fixed frame, 25. Glass tube outlet, 26. Recovery tube, 27. Glass tube plus sand port, 28 . Rock-carrying tool, 29. Eccentric triangular plate, 30. Support frame, 31. Blind plate, 32. Globe valve, 33. High-speed camera, 34. Tripod, 35. Computer.
具体实施方式detailed description
下面结合附图对本发明作进一步详细描述。The present invention will be described in further detail below in conjunction with the accompanying drawings.
如图1～4所示，一种水平井岩屑运移模拟实验装置及实验方法，包括钻井液系统、岩屑运移系统、岩屑供给系统、动力系统和岩屑回收系统五部分，其特征在于：所述钻井液系统由储液池20、出口截止阀19、电机18、离心泵17、压力表16、流量计15、蝶阀14和钢丝管12依次连接组成，所述岩屑运移系统由转换接头13、密封轴承23、玻璃管1、通孔法兰盘8、轴承9、PVC管2、PVC管接头7、携岩工具28、偏心三角盘29、盲板31和支撑架30构成，所述岩屑供给系统由螺旋送料器4和加岩屑装置5组成，所述动力系统由调速电机11、变速齿轮10和固定架24组成，所述数据处理系统由高速摄像机33、三脚架34和计算机35组成，所述岩屑回收系统由回收管26、过滤器21、岩屑回收池22和截止阀32依次连接组成，回收管26与玻璃管出口端25连接。As shown in Figures 1 to 4, a cuttings migration simulation experiment device and method for a horizontal well includes five parts: a drilling fluid system, a cuttings migration system, a cuttings supply system, a power system, and a cuttings recovery system. It is characterized in that the drilling fluid system is composed of a liquid storage tank 20, an outlet stop valve 19, a motor 18, a centrifugal pump 17, a pressure gauge 16, a flow meter 15, a butterfly valve 14 and a steel wire pipe 12, and the cuttings transport The system consists of a conversion joint 13, a sealed bearing 23, a glass tube 1, a through-hole flange 8, a bearing 9, a PVC tube 2, a PVC pipe joint 7, a rock-carrying tool 28, an eccentric triangular plate 29, a blind plate 31 and a support frame 30. The cuttings supply system is composed of a screw feeder 4 and a cuttings adding device 5, the power system is composed of a speed regulating motor 11, a speed change gear 10 and a fixed frame 24, and the data processing system is composed of a high-speed camera 33 and a tripod 34 Composed of computer 35, the debris recovery system is composed of recovery pipe 26, filter 21, debris recovery pool 22 and shut-off valve 32 connected in sequence, and recovery pipe 26 is connected with glass tube outlet port 25.
所述转换接头13小口端与钢丝管12连接，转换接头13大口端内部装有密封轴承23，密封轴承23通过过盈配合固定在PVC管2最右端，用于防止钢丝管12随PVC管2的旋转而转动；所述玻璃管1采用耐压、透明材料，可直接观测岩屑运移的过程，达到可视化的要求，玻璃管1两端带有法兰结构，玻璃管1之间通过螺栓连接，第三根玻璃管和第二根玻璃管分别装有左压力表3和右压力表6，玻璃管1内安装PVC管2；所述加岩屑装置5与螺旋送料器4相连，通过控制加岩屑装置5的加岩屑量，可达到模拟钻井产生的钻屑量；所述偏心三角盘29为圆筒状，圆筒外焊有三个支架，每个支架之间角度为120°，偏心三角盘29内安装PVC管2，偏心三角盘29与PVC管2之间的间隙为2～3mm,通过控制支架的长度来实现偏心三角盘29的偏心度。The small mouth end of the conversion joint 13 is connected with the steel wire pipe 12, and the inside of the large mouth end of the conversion joint 13 is equipped with a sealed bearing 23, and the sealed bearing 23 is fixed on the rightmost end of the PVC pipe 2 through interference fit, so as to prevent the steel wire pipe 12 from following the PVC pipe 2. The glass tube 1 is made of pressure-resistant and transparent material, which can directly observe the process of debris migration and meet the requirements of visualization. The two ends of the glass tube 1 have flange structures, and the glass tube 1 is connected by bolts. Connection, the third glass tube and the second glass tube are equipped with left pressure gauge 3 and right pressure gauge 6 respectively, PVC pipe 2 is installed in the glass tube 1; the described cuttings adding device 5 links to each other with screw feeder 4, through Controlling the amount of cuttings added by the cuttings adding device 5 can achieve the amount of cuttings produced by simulating drilling; the eccentric triangular disc 29 is cylindrical, and three brackets are welded outside the cylinder, and the angle between each bracket is 120° The PVC pipe 2 is installed in the eccentric triangular disk 29, the gap between the eccentric triangular disk 29 and the PVC pipe 2 is 2-3mm, and the eccentricity of the eccentric triangular disk 29 is realized by controlling the length of the support.
使用上述装置模拟水平井岩屑运移的方法，主要包括以下步骤：The method for simulating the movement of cuttings in a horizontal well using the above-mentioned device mainly includes the following steps:
1)通过钻井液系统向PVC管2提供钻井液，以模拟水平井井筒中的钻井液；1) Provide drilling fluid to the PVC pipe 2 through the drilling fluid system to simulate the drilling fluid in the wellbore of the horizontal well;
2)通过控制加岩屑装置5的加岩屑量，可达到模拟钻井产生的钻屑量，记录下左压力表3读数、右压力表6读数、加岩屑量、过滤器21中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；2) By controlling the amount of cuttings added by the cuttings adding device 5, the amount of cuttings produced by simulated drilling can be achieved, and the readings of the left pressure gauge 3, the reading of the right pressure gauge 6, the amount of cuttings added, and the amount of cuttings in the filter 21 can be recorded. The weight, trajectory and the re-settling distance of the cuttings bed particles after starting to analyze the influence of different cuttings volumes on the rock-carrying effect and pressure drop;
3)调节钻井液排量，记录流量计15读数，可达到模拟水平井钻井液不同排量下携岩情况，并记录下左压力表3读数、右压力表6读数、加岩屑量、过滤器21中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；3) Adjust the drilling fluid displacement and record the readings of flow meter 15, which can simulate the rock carrying situation under different displacements of drilling fluid in horizontal wells, and record the readings of the left pressure gauge 3, the right pressure gauge 6, the amount of cuttings added, and the filtration The weight and trajectory of the cuttings in the device 21 and the re-settling distance of the cuttings bed particles after starting to analyze the influence of different cuttings amounts on the rock-carrying effect and pressure drop;
4)通过更换不同的偏心三角盘29来改变PVC管2的偏心度，记录下左压力表3读数、右压力表6读数、加岩屑量、过滤器21中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响；4) Change the eccentricity of the PVC pipe 2 by changing different eccentric triangular discs 29, record the readings of the left pressure gauge 3, the reading of the right pressure gauge 6, the amount of cuttings added, the weight, track and rock cuttings in the filter 21 The re-settling distance of the cuttings bed particles after start-up, and the influence of different cuttings volumes on the rock-carrying effect and pressure drop are analyzed;
5)通过调节调速电机11来改变PVC管2的转速，记录下左压力表3读数、右压力表6读数、加岩屑量、过滤器21中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响。5) Change the rotational speed of the PVC pipe 2 by adjusting the speed-regulating motor 11, and record the readings of the left pressure gauge 3, the reading of the right pressure gauge 6, the amount of cuttings added, the weight of cuttings in the filter 21, the track and the particles of the cuttings bed After start-up, the subsidence distance is analyzed again, and the influence of different cuttings volumes on the rock-carrying effect and pressure drop is analyzed.
开始实验时，储液池20中的钻井液经出口截止阀19、离心泵17、蝶阀14和钢丝管12进入PVC管2，PVC管2的钻井液流入玻璃管1，在此过程中，钻井液携带从加岩屑装置5加入的岩屑经回收管26返回至岩屑回收池22，岩屑回收池22与储液池20之间设有截止阀32，打开截止阀32，钻井液流到储液池20，实现了钻井液的循环利用。通过改变排量、钻柱转速、钻柱与井眼间的偏心度、岩屑量及岩屑粒径可观察多种工况下水平井岩屑运移的情况。实验过程中记录左压力表3读数、右压力表6读数、加岩屑量、过滤器中岩屑的重量、轨迹以及岩屑床颗粒起动后再次沉降距离，分析不同钻屑量对携岩效果和压降的影响。When starting the experiment, the drilling fluid in the liquid storage tank 20 entered the PVC pipe 2 through the outlet stop valve 19, centrifugal pump 17, butterfly valve 14 and steel wire pipe 12, and the drilling fluid in the PVC pipe 2 flowed into the glass pipe 1. The fluid carries the cuttings added from the cuttings adding device 5 and returns to the cuttings recovery tank 22 through the recovery pipe 26. A stop valve 32 is arranged between the cuttings recovery tank 22 and the liquid storage tank 20. When the stop valve 32 is opened, the drilling fluid flows To the fluid storage pool 20, the recycling of drilling fluid is realized. By changing displacement, drill string rotation speed, eccentricity between drill string and borehole, cuttings volume and cuttings particle size, cuttings migration in horizontal wells under various working conditions can be observed. During the experiment, record the readings of left pressure gauge 3, right pressure gauge 6, the amount of cuttings added, the weight and trajectory of cuttings in the filter, and the re-settling distance of cuttings bed particles after starting, and analyze the effect of different cuttings amounts on rock carrying and pressure drop effects.
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