A drilling fluid recovery apparatus

Abstract

The utility model relates to a kind of drilling flushing fluid recovery equipment, including bottom plate pedestal, support frame capable of being suspended to support the screen filter component in the inclined posture is arranged on the bottom plate pedestal, and the upper side of the screen filter component is also provided with liquid supply pipe capable of conveying drilling flushing fluid to it;Two output ends of the screen filter component are respectively connected with waste residue collection box and liquid recovery tank capable of collecting screen filtered out granular impurities;The screen filter component includes the outer cylinder shell placed on the first support frame group of the support frame, the inner cylinder shell coaxially installed in the outer cylinder shell and the helical transfer mechanism rotatably coaxially arranged in the shell cavity of the inner cylinder shell.The utility model can efficiently and continuously carry out the recovery filtering of drilling flushing fluid, while improving the recycling efficiency of drilling flushing fluid, eliminate the disadvantages of frequent shutdown cleaning granular impurities and improve the comprehensive recovery processing speed of drilling flushing fluid.

Description

Technical Field

[0001] This utility model relates to the field of borehole flushing fluid screening and processing technology, and in particular to a borehole flushing fluid recovery device. Background Technology

[0002] Drilling refers to the process of using mechanical equipment to drill holes into the ground to create boreholes. It is an engineering project for exploring or developing liquid and gaseous minerals such as oil and natural gas. During drilling operations for resources such as oil, to ensure the continuous drilling performance of the drilling tools and to remove debris and other impurities generated during drilling to ensure borehole cleanliness, a continuous supply of borehole flushing fluid is used to rinse, cool, and lubricate the drilling tools. This ensures the working temperature and lubrication of the drill bit. The borehole flushing fluid is also used to clean debris and other contaminants from the borehole. Therefore, borehole flushing fluid is a raw material used in large quantities during drilling operations. To reduce waste and loss, it is usually recycled and reused, thereby reducing the overall cost of drilling. Borehole flushing fluid is the lifeblood of drilling, also known as drilling fluid. Borehole flushing fluids can be classified into water, mud, clay-free flushing fluids, emulsions, foams, and compressed air according to their composition. They can be directionally injected into the well to flush out the cuttings in the borehole and can also cool the drill bit, thus protecting it. The current method for recovering borehole flushing fluids is to directly use a settling tank for sedimentation.

[0003] However, because the recovered borehole flushing fluid contains a large amount of large particles such as rock cuttings, the sediment in the settling tank needs to be cleaned frequently during work stoppages. This affects the efficiency of continuous settling and filtration of the borehole flushing fluid during continuous drilling operations. As a result, the workload of cleaning the settling tank during the recovery and filtration process is large, the labor intensity of the relevant personnel is high, the overall filtration and recovery speed is poor, and the recycling efficiency of the borehole flushing fluid is reduced. Utility Model Content

[0004] The purpose of this invention is to provide a drilling flushing fluid recovery device that can efficiently and continuously recover and filter drilling flushing fluid, thereby improving the recycling efficiency of drilling flushing fluid and eliminating the drawbacks of frequent shutdowns for cleaning particulate matter, thus increasing the overall recovery and processing speed of drilling flushing fluid. This addresses the problem that existing drilling flushing fluid recovery and filtration equipment typically uses sedimentation tanks to filter impurities in the drilling flushing fluid. However, this method leads to an increasing amount of debris accumulating in the sedimentation tank, requiring operators to periodically stop and clean it to ensure the recovery and filtration effect, resulting in poor overall recovery efficiency and an inability to stably and continuously supply recyclable drilling flushing fluid.

[0005] The technical solution adopted by this utility model is as follows: a drilling flushing fluid recovery device, including a base plate, a support frame that can provide suspended support for a screening component in an inclined posture on the base plate, and a supply pipe that can deliver drilling flushing fluid to the screening component above the screening component; the two output ends of the screening component are respectively connected to a waste residue collection box and a liquid recovery box that can collect the filtered particulate impurities; the screening component includes an outer shell mounted on a first support frame group of the support frame, an inner shell coaxially installed in the outer shell, and a spiral transfer mechanism that is rotatably coaxially inserted in the cavity of the inner shell.

[0006] According to a preferred embodiment, the two ends of the outer shell are sealed and connected to a cover, and an inserting annular groove for mounting the inner shell is provided on the end face of the cover facing the inner cavity of the shell. A plurality of inserting limiting posts for inserting into the inner shell are also provided at intervals on the bottom surface of the annular groove of the inserting annular groove.

[0007] According to a preferred embodiment, the cylinder is inclinedly supported on the base plate by the first support frame assembly. A feed pipe head capable of communicating with the inner cavity of the inner cylinder shell is inserted into the middle section of the cylinder wall. A waste discharge pipe head and a return liquid conveying pipe head are respectively inserted into the inclined upper and lower cylinder walls of the cylinder. The waste discharge pipe head passes through the cylinder and the inner cylinder shell in sequence and communicates with the inner cavity of the inner cylinder shell. The return liquid conveying pipe head passes through the cylinder and communicates with the annular cavity between the cylinder and the inner cylinder shell.

[0008] According to a preferred embodiment, through windows are provided on the shell wall of the inner cylinder in a ring-shaped array, and a filter screen capable of intercepting particulate impurities in the drilling flushing fluid is laid in the through windows, and the filter screen is positioned in the through windows by a clamping limiting frame.

[0009] According to a preferred embodiment, a reinforcing rib is further provided in the cavity of the clamping and limiting frame to provide limiting support for the mesh surface of the filter screen; an assembly screw is also provided on the stepped surface formed by the through window by welding or threaded insertion, and the filter screen and the clamping and limiting frame are sequentially fitted onto the assembly screw.

[0010] According to a preferred embodiment, the spiral transfer mechanism includes a central rotating shaft and spiral blades mounted on the central rotating shaft. The inclined lower end of the central rotating shaft, which is coaxially arranged in the inner cylinder shell, is rotatably inserted into the cover, and its inclined upper end passes through the cover on the other side and is connected to the drive motor for transmission.

[0011] According to a preferred embodiment, the drive motor is detachably mounted on the surface of the cover away from the cylinder.

[0012] According to a preferred embodiment, a second support frame assembly is connected to both sides of the supply pipe to assist in the positioning and support of the support frame.

[0013] The beneficial effects of this utility model are:

[0014] The screening assembly described in this application can simultaneously transfer filtered rock cuttings and other particulate impurities while continuously filtering and recovering the borehole flushing fluid. This ensures the unobstructed flow of the filter screen and other screening components, guaranteeing continuous filtration performance and effectiveness. Furthermore, the simultaneous transfer of particulate impurities during filtration avoids the drawback of periodic shutdowns for cleaning required by existing sedimentation tanks, enabling continuous long-term filtration of the borehole flushing fluid and effectively improving the efficiency and effectiveness of borehole flushing fluid recovery and circulation. The support frame provided in this application maintains the screening assembly in an inclined, suspended state, allowing the outer and inner shells and the spiral transfer mechanism to effectively separate and output the borehole flushing fluid and particulate impurities. This effectively achieves preliminary filtration of solid impurities, ensuring that solid particulate impurities and borehole flushing fluid are output from different outlets, guaranteeing continuous and efficient filtration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred borehole flushing fluid recovery device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a preferred borehole flushing fluid recovery device proposed in this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the cover of a preferred borehole flushing fluid recovery device proposed in this utility model;

[0018] Figure 4 This is a plan view of the inner shell of a preferred borehole flushing fluid recovery device proposed in this utility model;

[0019] Figure 5 This is a cross-sectional schematic diagram of the inner shell of a preferred borehole flushing fluid recovery device proposed in this utility model at point AA.

[0020] List of reference numerals

[0021] 1: Base plate; 2: Screening assembly; 3: Support frame; 4: Liquid supply pipe; 5: Waste residue collection box; 6: Liquid recovery box; 21: Outer shell; 22: Inner shell; 23: Spiral transfer mechanism; 24: Feed pipe head; 25: Waste residue discharge pipe head; 26: Return liquid conveying pipe head; 27: Drive motor; 211: Cylinder body; 212: Cover body; 213: Embedded annular groove; 214: Inserted limiting post; 215: Spiral heat dissipation pipe; 216: Pre-cooling spiral pipe; 217: Exhaust pipe connector; 221: Through window; 222: Filter screen; 223: Clamping limiting frame; 224: Reinforcing rib; 225: Assembly screw; 231: Central rotating shaft; 232: Spiral blade; 31: First support frame group; 32: Second support frame group. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0024] The following is a detailed explanation with reference to the accompanying drawings.

[0025] Example 1

[0026] This application provides a drilling flushing fluid recovery device, which includes a base plate 1, a screening assembly 2, a support frame 3, a liquid supply pipe 4, a waste collection box 5, and a liquid recovery box 6.

[0027] according to Figure 1In one specific embodiment, the base plate 1 provides an elevated platform to adapt to outdoor environments of varying severity. A support frame 3 is mounted on the base plate 1 to provide suspended support for the screen assembly 2 in an inclined state. A supply pipe 4 for conveying drilling flushing fluid is also provided above the screen assembly 2. The two output ends of the screen assembly 2 are respectively connected to a waste collection tank 5 and a liquid recovery tank 6 for collecting the filtered particulate impurities. The screen assembly 2 provided in this application can simultaneously transfer filtered rock cuttings and other particulate impurities while continuously filtering and recovering the drilling flushing fluid, thereby ensuring the unobstructed flow of the filter screen 222 and other filter components, guaranteeing continuous filtration performance and effectiveness. Furthermore, the continuous transfer of particulate impurities during the filtration process avoids the drawback of requiring periodic shutdowns for cleaning of existing sedimentation tanks, achieving continuous long-term drilling flushing fluid recovery and filtration, effectively improving the efficiency and effectiveness of drilling flushing fluid recovery and circulation. The support frame 3 provided in this application can keep the filter assembly 2 in an inclined suspended state, so that the cooperation of the outer shell 21, the inner shell 22 and the spiral transfer mechanism 23 can effectively separate and output the drilling flushing fluid and particulate impurities, thereby effectively realizing the preliminary filtration of solid impurities, and ensuring the continuous high efficiency of the filtration work by allowing solid particulate impurities and drilling flushing fluid to be output from different outlets.

[0028] Preferably, the screening assembly 2 includes an outer cylinder shell 21 mounted on a first support frame group 31 of the support frame 3, an inner cylinder shell 22 coaxially installed in the outer cylinder shell 21, and a spiral transfer mechanism 23 rotatably and coaxially inserted into the cavity of the inner cylinder shell 22. Preferably, the cylinder body 211 is inclinedly supported on the base plate 1 by the first support frame group 31. Preferably, a feed pipe head 24 capable of communicating with the inner cavity of the inner cylinder shell 22 is inserted into the middle section of the cylinder wall of the cylinder body 211. Preferably, a waste residue discharge pipe head 25 and a return liquid conveying pipe head 26 are respectively inserted into the inclined upper and lower cylinder walls of the cylinder body 211. More preferably, the waste residue discharge pipe head 25 passes through the cylinder body 211 and the inner cylinder shell 22 in sequence and communicates with the inner cavity of the inner cylinder shell 22. More preferably, the return liquid conveying pipe head 26 penetrates the cylinder body 211 and communicates with the annular cavity between the cylinder body 211 and the inner cylinder shell 22. Preferably, the feed pipe head 24 penetrates the cylinder body 211 and the inner cylinder shell 22 in sequence, and the sealing of the insertion is ensured by welding or other methods, so that its cavity is separated from the annular cavity, and the input drilling flushing fluid directly enters the inner cavity of the inner cylinder shell 22. Preferably, the feed pipe head 24 is sealed and connected to the liquid supply pipe 4 by a flange or other structure. Preferably, the waste residue discharge pipe head 25 is sealed and penetrates the cylinder body 211 and the inner cylinder shell 22 by welding or other methods, so that its cavity is separated from the annular cavity, and the output particulate matter is directly transferred from the inner cylinder shell 22 to the cavity of the waste residue discharge pipe head 25. Preferably, the end of the waste residue discharge pipe head 25 that is connected to the inner cylinder shell 22 has an expansion port, so as to facilitate and effectively receive the particulate matter transferred by the spiral transfer mechanism 23. Preferably, the return liquid conveying pipe head 26 is sealed and inserted into the cylinder 211 by welding or other means. Preferably, the output end of the waste residue discharge pipe head 25 is inserted into the waste residue collection box 5. Preferably, the return liquid conveying pipe head 26 is sealed and connected to the liquid recovery box 6 by a flange or other structure. Preferably, the drive motor 27 is detachably mounted on the surface of the cover 212 away from the cylinder 211 by a foot fixedly connected to its body. Preferably, the drive motor 27 can be a PDY895S type high-torque geared motor whose rotation speed can be manually modified as needed. More preferably, the output shaft of the drive motor 27 is connected to the central rotating shaft 231 that passes through the cover 212 by a coupling. Specifically, countersunk screws are inserted into the foot, and the front end of the countersunk screw is threaded into the cover 212 to ensure the connection between the drive motor 27 and the cover 212.

[0029] Preferably, the two ends of the outer shell 21's cylindrical body 211 are sealed and connected to a cover 212. Preferably, an inserting annular groove 213 is provided on the end face of the cover 212 facing the inner cavity of the cylindrical body 211, which can be used to fit and install the inner shell 22. Preferably, multiple insertion limiting posts 214 are also provided at intervals on the bottom surface of the annular groove of the inserting annular groove 213, which can be inserted into the assembly holes opened on the annular end face of the inner shell 22. Preferably, the end face of the cover 212 is also provided with a mating annular groove adapted to the outer shell 21, and both the mating annular groove and the inserting annular groove 213 are lined with annular sealing gaskets. Preferably, the cover 212 is secured to the cylinder 211 by a countersunk screw inserted through a threaded hole on the end face of the cylinder 211, and simultaneously defines the coaxial assembly position of the inner shell 22 within the cylinder 211, thereby forming an annular chamber between the inner shell 22 and the cylinder 211 for the directional collection and containment of the filtered drilling flushing fluid. Preferably, a spiral heat dissipation tube 215 is embedded in the inner wall of the cylinder 211 below the feed pipe head 24. More preferably, the input end of the spiral heat dissipation tube 215 is connected to a precooling spiral tube 216, thereby connecting the input end of the precooling spiral tube 216 and the output end of the spiral heat dissipation tube 215 to an external coolant circulation device, thus forming a coolant circulation loop. Preferably, the coolant circulation device is a conventionally used coolant circulation drive and heat dissipation device. It drives the coolant to flow continuously in a closed loop while effectively dissipating heat and cooling the coolant flowing through it, allowing the output coolant to undergo secondary cooling. As a prior art coolant circulation device, its operating power and cooling capacity can be manually adjusted according to requirements. For example, the operator can use the coolant circulation device to cool the coolant to below 5°C as needed, enabling the coolant to effectively pre-cool the recovered and filtered drilling flushing fluid, allowing the drilling flushing fluid to be cooled to a specific temperature more efficiently in subsequent cooling processes, thus improving the overall efficiency of the recovery process. As a prior art product, this application can directly use products such as the KRH series coolant circulation radiator, only requiring the use of external pipelines with pipe joints to connect the circulation loop as needed; therefore, further details are omitted. Preferably, the input end of the spiral heat dissipation pipe 215 is also connected in series with the pre-cooling spiral pipe 216 coiled on the return liquid conveying pipe head 26. Specifically, both can be wrapped around the outer wall of the cylinder 211 and the return liquid conveying pipe head 26 respectively to pre-cool the drilling flushing fluid through heat conduction. The spiral heat dissipation pipe 215 and the return liquid conveying pipe head 26 are used to pre-cool the filtered drilling flushing fluid to a certain extent, so as to improve the efficiency of subsequent cooling of the filtered drilling flushing fluid and facilitate the efficient recycling of the drilling flushing fluid.More preferably, both can be embedded in the inner wall and then coated with a thermally conductive and corrosion-resistant film made of a polymer composite material (PPS / PTFE-based) to ensure that the inner wall of the cylinder 211 and the inner wall of the return liquid conveying pipe head 26 have a smooth and seamless pipe wall surface, and reduce the difficulty and distance of heat conduction, thereby further improving the heat conduction efficiency to a certain extent. Preferably, an exhaust pipe connector 217 is also inserted into the cylinder wall at the inclined upper end of the cylinder 211, so that the associated gas mixed in the drilling flushing fluid is separated due to the different gas-liquid flow directions and the action of its own gravity and buoyancy. The associated gas that rises under its own buoyancy is transferred through the exhaust pipe connector for separate treatment using associated gas treatment equipment.

[0030] Preferably, through windows 221 with stepped mounting surfaces are formed in a ring-shaped array on the shell wall of the inner cylinder 22. More preferably, a filter screen 222 made of high-strength metal wire with bent edges, capable of intercepting particulate impurities in the drilling flushing fluid, is laid inside the through window 221. More preferably, the filter screen 222 is positioned within the through window 221 by a clamping and limiting frame 223, so that the mesh surface of the filter screen 222 is flush with the inner wall surface of the inner cylinder 22. Preferably, reinforcing ribs 224 are also provided in the frame cavity of the clamping and limiting frame 223 to provide limiting support for the mesh surface of the filter screen 222. Preferably, mounting screws 225 are also provided on the stepped surface formed by the through window 221 by welding or threaded insertion. Specifically, the filter screen 222 and the clamping and limiting frame 223 are sequentially fitted onto the assembly screw 225, and the relative positions of the filter screen 222 and the clamping and limiting frame 223 with the inner cylinder shell 22 are limited by the limiting nut threaded onto the assembly screw 225. Preferably, the filter screen 222 is used for the initial filtration and separation of large-sized particles such as rock cuttings. As a filtration structure in the initial solid phase separation process, its mesh size is 150-180μm (approximately 100 mesh), used to remove large particulate impurities such as drill cuttings and sand particles, protecting subsequent fine filtration equipment, and meeting the primary filtration requirements recommended by API. The filter screen 222 is arranged flush with the inner wall of the inner cylinder shell 22, which allows the drilling flushing fluid to pass through the mesh while particulate impurities are intercepted and scraped away by the continuously rotating spiral blades 232 of the spiral transfer mechanism 23. This ensures that the mesh of the filter screen 222 is unobstructed, maintaining continuous filtration effect and efficiency. It achieves high-efficiency filtration while also cleaning up intercepted particulate impurities, ensuring continuous recovery efficiency of the drilling flushing fluid.

[0031] Preferably, the spiral transfer mechanism 23 includes a central rotating shaft 231 and spiral blades 232 spirally mounted on the central rotating shaft 231 by welding or other means. Preferably, the inclined lower end of the central rotating shaft 231, coaxially arranged in the inner cylinder shell 22, is rotatably inserted into the cover 212 through a sealed bearing fixedly embedded in the cover 212, and its inclined upper end passes through the cover 212 on the other side and is connected to the drive motor 27 for transmission. Preferably, the spiral blades 231 have a plurality of through guide holes arranged at intervals on their blades, so that during the upward transfer of the filtered particulate impurities driven by rotation, the drilling flushing fluid can be inclined downward, so as to cooperate with the filter screen 212 to separate the drilling flushing fluid from the particulate impurities, thereby allowing the drilling flushing fluid and particulate impurities to be discharged from different outlets. Specifically, the diameter of the through-flow guide holes gradually decreases along the axial direction of the inclined central rotating shaft 231. The diameter of the through-flow guide holes on the spiral blades 232 in the lower inclined region is smaller than that on the spiral blades 232 in the upper inclined region. Specifically, the diameter of the through-flow guide holes can be slightly larger than the mesh size of the filter screen 222; for example, its diameter can be 180–200 μm. Preferably, a sealing ring is nested on the central rotating shaft 231 to fill the assembly gap at one end of its penetration through the cover 212, thereby ensuring the separation of the inner cavity of the inner cylinder shell 22 from the outside.

[0032] Preferably, the support frame 3 includes a first support frame group 31 and a second support frame group 32 that tilt to support the outer cylinder shell 21. Preferably, the first support frame group 31 is composed of several support columns arranged in a matrix with height differences, and connecting crossbars are provided between the support columns to improve the overall structural stability of the support frame. Preferably, a second support frame group 32 for auxiliary support and positioning of the liquid supply pipe 4 is also connected to both sides of the liquid supply pipe 4. Preferably, the second support frame group 32 includes L-shaped support rods arranged in alignment and connecting sleeves fitted onto the liquid supply pipe 4.

[0033] Preferably, the electrical components such as the drive motor 27 and the coolant circulation equipment involved in this application are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0034] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0035] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A drilling fluid recovery device, comprising a base plate (1), characterized in that, A support frame (3) is provided on the base plate (1) to provide suspended support for the screening assembly (2) in an inclined posture, and a supply pipe (4) is provided above the screening assembly (2) to deliver drilling flushing fluid to it. The two output ends of the filtration assembly (2) are respectively connected to a waste collection box (5) and a liquid recovery box (6) that can collect the filtered particulate impurities; The screening assembly (2) includes an outer shell (21) mounted on a first support frame group (31) of the support frame (3), an inner shell (22) coaxially mounted in the outer shell (21), and a spiral transfer mechanism (23) rotatably coaxially passing through the cavity of the inner shell (22).

2. The borehole flushing fluid recovery equipment as described in claim 1, characterized in that, The outer shell (21) has a cover (212) sealingly connected to both ends of the cylinder (211), and the end face of the cover (212) facing the inner cavity of the cylinder (211) is provided with an inserting annular groove (213) that can be fitted into the inner shell (22). Multiple insertion limiting posts (214) capable of being inserted into the inner cylinder shell (22) are also provided at intervals on the bottom surface of the annular groove cavity of the embedded annular groove (213).

3. The borehole flushing fluid recovery equipment as described in claim 2, characterized in that, The cylindrical body (211) is inclinedly supported on the base plate (1) by the first support frame assembly (31). A feed pipe head (24) capable of communicating with the inner cavity of the inner shell (22) is inserted into the middle section of the cylinder wall of the cylinder body (211), and a waste discharge pipe head (25) and a return liquid conveying pipe head (26) are respectively inserted into the inclined upper and lower cylinder walls of the cylinder body (211). The waste discharge pipe head (25) passes through the cylinder (211) and the inner cylinder shell (22) in sequence and is connected to the inner cavity of the inner cylinder shell (22); The return liquid conveying pipe head (26) passes through the cylinder (211) and is connected to the annular cavity between the cylinder (211) and the inner cylinder shell (22).

4. The borehole flushing fluid recovery equipment as described in claim 3, characterized in that, A through window (221) is provided on the shell wall of the inner cylinder (22) in a ring-shaped array, and a filter screen (222) is laid in the through window (221) to intercept particulate impurities in the drilling flushing fluid. The filter screen (222) is positioned in the through window (221) by a clamping limit frame (223).

5. The borehole flushing fluid recovery equipment as described in claim 4, characterized in that, The clamping and limiting frame (223) is also provided with reinforcing ribs (224) that can provide limiting support for the mesh surface of the filter screen (222); An assembly screw (225) is provided on the stepped surface formed by the through window (221) by welding or threaded insertion, and the filter screen (222) and the clamping limit frame (223) are sequentially fitted onto the assembly screw (225).

6. The borehole flushing fluid recovery device as described in claim 5, characterized in that, The spiral transfer mechanism (23) includes a central rotating shaft (231) and spiral blades (232) mounted on the central rotating shaft (231). The inclined lower end of the central rotating shaft (231) is coaxially arranged in the inner cylinder shell (22) and is rotatably inserted into the cover (212). Its inclined upper end passes through the cover (212) on the other side and is connected to the drive motor (27) for transmission.

7. The borehole flushing fluid recovery device as described in claim 6, characterized in that, The drive motor (27) is detachably mounted on the surface of the cover (212) away from the cylinder (211).

8. The borehole flushing fluid recovery equipment as described in claim 7, characterized in that, A second support frame group (32) of the support frame (3) is connected to both sides of the liquid supply pipe (4) to provide auxiliary support and positioning.

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