A drilling fluid recovery processing system and method for exploration boreholes

Abstract

The present application provides a kind of drilling fluid recovery processing system and method for exploration drilling hole.The system includes that the recovery circulation system includes drilling fluid drainage device, first filter component, second filter component, third filter component and sediment tank;The system directly collects the up-returning cuttings carrying drilling fluid from the exploration hole orifice, and is separated and recovered to the liquid storage tank by series filter device for mud pump circulation use.100% recovery of the up-returning cuttings carrying drilling fluid from the hole orifice, through multistage filtration, sedimentation, obtain clean drilling fluid without slag and return it to the drilling fluid storage tank for continuous recycling.The present application can not only ensure that there is no drilling fluid discharge and no pollution on the surface within the drilling operation range during urban and rural area surveying, but also can filter and sediment the cuttings carrying drilling fluid and the remaining drilling fluid of coring pipe for recycling, which can save more than 50% of the overall amount of drilling fluid for exploration hole, is easy to operate, has obvious effect, and has great popularization and application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of municipal survey, in particular to a drilling fluid recycling system and method for exploration drilling. BACKGROUND

[0002] In the field of municipal engineering, the red line range of road, bridge, subway tunnel and pipeline engineering is often located in urban roads, green belts and residential areas. The safety and environmental protection requirements during construction are extremely high. During the field construction process of the survey unit, the rotary drilling machine is assisted by the drilling fluid circulation to drill the core. If the drilling fluid with cuttings returned from the drilling hole is not controlled and discharged randomly, it will flow in the surrounding urban roads, green belts and residential areas, causing pollution to the municipal environment and residential areas, and affecting the urban environment and normal life of residents.

[0003] In order to control the drilling fluid of the exploration hole and avoid random discharge of the drilling fluid, the common processing method at present is to set up a fence around the drilling machine operation range to block the view, then to form an annular soil wall by piling soil at the hole of the exploration hole to restrict the drilling fluid within the soil wall, then to dig a gap in the annular soil wall and continue to pile soil to form a passage, and finally to connect to the liquid collecting tank. This processing method requires a large amount of soil for piling, and the height of the soil wall is generally high to ensure sufficient storage capacity. Moreover, the soil wall cannot be densely stacked, and the drilling fluid is easy to flow out of the gap of the soil wall. After drilling, it is difficult to clean the soil wall mixed with hole liquid and debris, and it is still impossible to avoid environmental pollution, which is easy to be punished by law enforcement. In addition, another processing method is to dig a groove from the hole of the drilling hole to guide the flow, and then to dig a water pit to collect the drilling fluid of the exploration hole. The groove is connected to the water pit. However, this method is only suitable for soil ground, and it is difficult to realize in hardened ground such as asphalt pavement and concrete terrace. SUMMARY

[0004] To solve the problems in the above background art, the present application provides a drilling fluid recycling system and method for exploration drilling, which directly collects the returned drilling fluid with cuttings from the hole of the exploration hole, avoids the flow of the drilling fluid from the hole to the ground to pollute the environment, and does not need to pile soil at the hole to intercept or dig a groove to guide the flow of the drilling fluid. In addition, the returned drilling fluid with cuttings and the remaining drilling fluid in the core tube after sampling are purified and recovered into the liquid storage tank by a series of filtering devices for circulation by the mud pump.

[0005] In order to achieve the above technical purpose, the present application provides a drilling fluid recycling system for exploration drilling, which is used for recycling and utilizing the drilling fluid during the core sampling process of the exploration drilling hole, and is characterized in that the recycling and circulating system comprises a drilling fluid guiding device, a first filtering component, a second filtering component, a third filtering component and a sediment tank.

[0006] The drilling fluid drainage device comprises a drainage sleeve and a circulating drainage groove, a lower end of the drainage sleeve is provided with a tapered butt joint, and a support ring plate is arranged at a boundary position of the tapered butt joint; the drainage sleeve is inserted into the exploration drill hole through the tapered butt joint, and is supported and fixedly installed at the exploration drill hole orifice by the support ring plate which is arranged on the hardening layer of the hole wall around the exploration drill hole orifice; one end of the circulating drainage groove is communicated with the region of the drainage sleeve located above the support ring plate, and the other end is communicated with the liquid inlet of the first filtering component, so as to introduce the drilling fluid returned during the drilling sampling process of the exploration drill hole into the first filtering component; the first filtering component is an inclined groove body with high end and low end, and a transverse groove is continuously arranged on the inclined bottom surface of the groove body; the liquid inlet of the first filtering component is arranged at the high end, the liquid outlet is arranged at the bottom end, the liquid outlet is communicated with the liquid inlet of the second filtering component; the second filtering component is a square filtering box containing double filtering screens, the liquid inlet is arranged at the upper part of the filtering box, the liquid outlet is arranged at the lower part of the filtering box, and the liquid outlet is communicated with the liquid inlet of the third filtering component;

[0007] The third filtering component comprises an inclined box structure, the low end bottom of the box structure is provided with a liquid inlet and is communicated with the liquid outlet of the second filtering component, the high end upper part of the box structure is provided with a liquid outlet and is communicated with the liquid inlet of the sedimentation tank; the liquid inlet and the liquid outlet of the box structure are communicated through an S-shaped liquid channel arranged in the box structure, a fine filter screen is arranged in the S-shaped liquid channel, an impeller assembly is arranged at each inflection point of the S-shaped liquid channel, and a power mechanism is arranged on the box structure; the power mechanism drives the impeller assembly arranged at each inflection point to rotate simultaneously through a transmission mechanism, and the drilling fluid in the liquid inlet of the box structure is transported to the liquid outlet.

[0008] Further technical solutions of the present application: the system further comprises a storage and filtering device for exploration drill hole sampling samples, the storage and filtering device for sampling samples comprises a sample storage box, a filtering box and a sample drilling fluid recovery box, the sample storage box is arranged in the filtering box, a plurality of sample storage grooves are arranged in the sample storage box, and a plurality of drainage holes are arranged in the inner groove surface of each sample storage groove; the filtering box is provided with a filtering cavity with large upper part and small lower part, the sample storage box is embedded at the large liquid inlet cavity of the upper part of the filtering cavity, each drainage hole is communicated with the liquid inlet cavity of the filtering cavity, and a filter screen is arranged at the small liquid outlet cavity of the lower part of the filtering cavity; the sample drilling fluid recovery box is arranged below the filtering box, and the liquid inlet of the sample drilling fluid recovery box is opposite to the liquid outlet cavity of the filtering cavity; after the drilling fluid filtered by the exploration drill hole sampling sample is received by the sample drilling fluid recovery box, the drilling fluid is poured into the drilling fluid drainage device.

[0009] The preferred technical scheme of the present application is: the system further comprises a liquid storage tank for storing the treated drilling fluid; the inner bottom surface of the liquid storage tank is a slope surface, the lowest point of the slope surface bottom is adjacent to one of the side walls, and a liquid discharge gate is arranged at the bottom of the side wall; the sedimentation tank is an open-top tank structure, one side adjacent to the open top is provided with a second docking notch matched with the liquid outlet of the third filter component, the liquid outlet of the third filter component is sealingly docked with the second docking notch, a siphon pipe is arranged in the sedimentation tank and communicates with the liquid storage tank through the siphon pipe, and the pipe opening of the siphon pipe is located in the upper middle part of the sedimentation tank.

[0010] The preferred technical scheme of the present application is: the first filter component is a slot body structure with a narrow upper end and a wide lower end, the narrow upper end is provided with a liquid inlet narrow opening, the wide lower end is provided with a liquid outlet wide opening, the liquid inlet narrow opening of the upper end is docked with one of the grooves of the circulating drainage groove, and the liquid outlet wide opening is docked with the liquid inlet of the second filter component.

[0011] The preferred technical scheme of the present application is: the square filter box of the second filter component is an open-top tank structure, a first docking notch matched with the first filter component is arranged at the position adjacent to the open top of the square filter box, and the liquid outlet of the first filter component is docked with the first docking notch of the square filter box; a horizontal filter screen is arranged in the tank body of the square filter box, the liquid outlet of the square filter box is arranged at the bottom of the side surface of the tank body, a vertical filter screen is arranged at the liquid outlet, the horizontal filter screen is arranged at a position lower than the first docking notch and higher than the vertical filter screen; and the tank bottom of the square filter box is an inclined slope surface, and the low end of the inclined slope surface is adjacent to the vertical filter screen.

[0012] The preferred technical scheme of the present application is as follows: the power mechanism comprises a motor and a main drive belt pulley arranged on the output shaft of the motor, the motor is installed in the middle of the box structure through a motor fixing frame, and the main drive belt pulley is a double-groove belt pulley; the impeller assembly comprises an impeller shaft and impellers distributed on the impeller shaft, the impeller shaft is horizontally installed at the turning position of the S-shaped liquid channel, the length of the impeller shaft is matched with the width of the S-shaped liquid channel, and both ends of the impeller shaft are rotatably installed on the side wall of the box structure, one end of the impeller shaft extends out of the box structure, and a key groove is arranged at the extending end of the impeller shaft; the box structure is a long strip-shaped box, the impeller assembly is provided with four groups, and the four groups of impeller assemblies are arranged at the starting position, the ending position and the two turning positions of the S-shaped liquid channel respectively, two groups of impeller assemblies on the same side are arranged in a one-to-one correspondence; the transmission mechanism comprises transmission gears arranged at the ends of the impeller shafts extending out of the box structure and first transmission belts and second transmission belts installed in the two belt installation grooves of the main drive belt pulley, the transmission gears on the two impeller shafts arranged on the same side of the drive belt pulley are meshed with each other, a transmission wheel is installed on any one of the impeller shafts on each side of the drive belt pulley, and the first transmission belt and the second transmission belt are respectively connected with the two transmission wheels in a belt transmission mode; the four groups of impeller assemblies are simultaneously driven to rotate by the motor through the first transmission belt and the second transmission belt.

[0013] The preferred technical scheme of the present application is as follows: the drilling fluid drainage device further comprises a liquid discharge chamber, the inner bottom surface of the liquid discharge chamber is higher than the inner bottom surface of the circulating drainage groove, the circulating drainage groove is a three-way groove and is provided with three groove openings; the first groove opening of the circulating drainage groove is in communication with the upper part of the drainage sleeve, the third groove opening is connected with the liquid inlet port of the upper end of the first filtering part, and the drilling fluid and the residual drilling fluid of the core tube returned during the drilling sampling process of the exploration drilling hole are transported to the liquid inlet port of the first filtering part; the second groove opening of the circulating drainage groove is in communication with the liquid discharge chamber and is used for receiving the drilling fluid filtered out by the sample storage and filtration device.

[0014] The preferred technical scheme of the present application is as follows: the sample storage groove is a semicylindrical groove, and a plurality of sample storage grooves are distributed in parallel in the sample storage box; the filtering cavity is an inverted trapezoidal cavity, the filtering box is clamped at the large cavity opening of the upper part of the filtering cavity, the bottom of the filtering box is provided with a supporting column, and the sample drilling fluid recovery box is located directly below the filter screen.

[0015] In order to achieve the above technical purpose, the present application provides a drilling fluid recycling and processing method for exploration drilling, which uses the drilling fluid recycling and processing system for exploration drilling to recycle and utilize the drilling fluid during the sampling process of the exploration drilling, and the specific steps are as follows:

[0016] S1. After the drilling rig is positioned at the drilling site, a dry drilling is performed by using a rough diameter pipe to penetrate the surface hardening layer to form an exploration borehole, and then a drainage casing is inserted into the borehole to support the ring plate to contact the hardening layer of the borehole wall around the borehole, and the first filter component, the second filter component, the third filter component, the sediment tank and the liquid storage tank are sequentially placed beside the drilling rig;

[0017] S2. Replace the core tube with a small diameter, and start drilling and sampling by adding drilling fluid to the liquid storage tank. During the drilling and sampling process, the mud pump pumps the drilling fluid from the liquid storage tank into the drill pipe, and the drilling fluid flows out of the drill bit at the bottom of the borehole to carry the cutting material up the borehole wall. By using the diameter change operation after the borehole is opened, the lower end of the drainage casing is inserted into the diameter change of the borehole wall to become part of the borehole wall. The drilling fluid continues to flow up in the drainage casing to the circulation drainage groove, and then flows into the first filter component and then into the second filter component.

[0018] S3. When the drilling fluid in the second filter component exceeds half of the tank, the motor of the third filter component is started. The motor drives the impeller assembly at each inflection point of the S-shaped liquid passage through the transmission mechanism, thereby sucking the drilling fluid into the S-shaped liquid passage of the third filter component. Under the action of the impeller rotation force, the drilling fluid is filtered and lifted to the height of the inlet of the sediment tank and flows into the sediment tank. As the liquid level of the drilling fluid in the sediment tank rises, the upper clear liquid in the sediment tank is sucked into the liquid storage tank under the action of the siphon, and the circulation continues.

[0019] The preferred technical solution of the present application is that during the drilling and sampling process, when the core tube is full of samples, the drill is pulled out and the lower end of the core tube is placed in the sample storage groove of the sample storage box. The samples are taken out by knocking or water pressure and placed in the sample storage box. The remaining drilling fluid in the core tube enters the filter box through the drainage holes on the bottom surface of the sample storage groove, and finally flows into the sample drilling fluid recovery box through the filter screen. Then the drilling fluid collected in the sample drilling fluid recovery box is poured into the liquid storage room for filtration and recovery.

[0020] The bottom surface of the liquid discharging chamber is higher than the bottom surface of the circulating drainage groove, so that the drilling fluid is prevented from flowing back; the inside of the filter box is a reverse trapezoidal space, a filter screen is placed at the bottom convergence, and a stand column is arranged around the outside to support the filter box from the ground; the first filter part is an inclined slope surface, the slope surface is provided with continuous transverse grooves, the top of the slope is a narrow upper opening, the bottom of the slope is a wide lower opening, the upper opening is narrow and the lower opening is wide, the upper part is high and the lower part is low, when the drilling fluid flows through the slope surface, the flow cross section gradually increases and the flow velocity gradually decreases, the flow surface is undulating, large-particle-size substances carried in the drilling fluid are separated and retained due to the slow flow velocity and friction, and the remaining drilling fluid continues to flow downward into the second filter part. The second filter part is a square filter box containing double filter screens, the drilling fluid flows downward from the top, the next large-particle-size substances are blocked by the horizontal filter screen, the drilling fluid flows to the bottom of the filter box, the bottom surface of the filter box is a slightly right-inclined slope surface, the drilling fluid flows to the bottom end outlet, and the drilling fluid passing through the vertical filter screen at the outlet is filtered again to block the next large-particle-size substances.

[0021] In the third filter part, an S-shaped channel is provided with a filter screen, small particles are blocked at the upper end of the middle channel, then the upper channel continues to flow upward, and finally the filtered liquid is lifted twice and enters the sedimentation tank. The sedimentation tank is a sedimentation tank and a siphon pipe, the siphon pipe connects the sedimentation tank and the liquid storage tank, the mouth of the siphon pipe is located in the upper middle part of the sedimentation tank, after the drilling fluid flows into the sedimentation chamber, the particles move downward and the clear liquid moves upward, as the amount of drilling fluid in the sedimentation tank increases, the clear liquid surface of the drilling fluid contacts the siphon pipe, and then the drilling fluid is sucked into the pipe under the siphon effect and finally flows to the liquid storage tank. The liquid storage tank is used for storing the drilling fluid, a mud pump pumps the drilling fluid for drilling, and the recovered and filtered drilling fluid flows to the liquid storage tank for recycling. The inside bottom surface of the liquid storage tank is a slope surface, the slope bottom surface is close to a side wall, and the bottom of the side wall is provided with a liquid discharge gate, so that the waste drilling fluid can be discharged after the drilling is completed.

[0022] The present application can ensure that there is no drilling fluid discharge and no pollution on the surface within the drilling operation range during the urban and rural area exploration, and can filter and recycle the drilling fluid carried with slag and the drilling fluid in the remaining exploration hole, thereby reducing the overall amount of drilling fluid in the drilling process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the device of the present application;

[0024] Figure 2 It is a schematic diagram of the structure of the drilling fluid drainage part;

[0025] Figure 3 It is a sectional view of the drilling fluid drainage part;

[0026] Figure 4 Structure diagram of the storage filter device for sampling sample;

[0027] Figure 5 Sectional view of the storage filter device for sampling sample;

[0028] Figure 6 Structure diagram of the first filter component;

[0029] Figure 7 Structure diagram of the second filter component;

[0030] Figure 8 Sectional view of the second filter component;

[0031] Figure 9 Structure diagram of the third filter component as a whole;

[0032] Figure 10 Sectional view of the S-shaped channel of the third filter component;

[0033] Figure 11 Structure diagram of the third filter component in split;

[0034] Figure 12 Structure diagram of the third filter component in split of the impeller transmission;

[0035] Figure 13 Structure diagram of the sedimentation tank;

[0036] Figure 14 Structure diagram of the liquid storage tank.

[0037] In the figure: 1-drilling fluid drainage device, 11-drainage casing, 111-conical butt joint, 112-support ring plate, 12-circulation drainage groove, 121-first slot, 122-second slot, 123-third slot, 13-drainage chamber; 2-storage filter device for sampling sample, 21-sample storage box, 211-drainage hole, 22-filter box, 221-filter cavity, 222-filter screen, 23-sample drilling fluid recovery box; 3-first filter component, 31-groove, 32-liquid inlet narrow mouth, 33-liquid outlet wide mouth; 4-second filter component, 41-horizontal filter screen, 42-vertical filter screen, 43-first butt joint notch, 44-inclined slope; 5-third filter component, 51-S-shaped liquid channel, 52-box structure, 53-fine filter screen, 54-power mechanism, 541-motor, 542-motor fixing frame, 543-main drive pulley, 544-motor transmission shaft, 55-rotary impeller group, 551-impeller group, 552-impeller transmission shaft, 553-keyway, 56-first transmission belt, 57-second transmission belt, 58-transmission gear, 59-transmission wheel; 6-settling tank, 61-second butt joint notch, 62-settling chamber, 63-siphon; 7-liquid storage tank, 71-drainage gate; 8-exploration borehole, 81-hole wall variable diameter step; 9-hole wall hardening layer. DETAILED DESCRIPTION

[0038] The application will be further described below in conjunction with the drawings and examples. The drawings are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the application. The technical solutions shown in the drawings are specific solutions of the embodiments of the application, and are not intended to limit the scope of the claimed application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application. Figures 1 to 14 The drawings are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the application. The technical solutions shown in the drawings are specific solutions of the embodiments of the application, and are not intended to limit the scope of the claimed application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0039] In the description of the application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the purpose of facilitating the description of the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0040] The embodiment provides a drilling fluid recovery processing system for an exploration borehole, which is used for recycling drilling fluid in the drilling sampling process of the exploration borehole 8, such asFigure 1 As shown in the figure, the recycling system comprises a drilling fluid drainage device 1, a sample storage and filtration device 2, a first filtration component 3, a second filtration component 4, a third filtration component 5, a sediment tank 6 and a liquid storage tank 7. Figure 2 and Figure 3 As shown in the figure, the drilling fluid drainage device 1 comprises a drainage sleeve 11, a circulating drainage groove 12 and a liquid discharge chamber 13. The lower end of the drainage sleeve 11 is provided with a tapered butt joint 111, and a support ring plate 112 is arranged at the boundary of the tapered butt joint 111. The drainage sleeve 11 is inserted into the exploration borehole 8 through the tapered butt joint 111, and is supported by the support ring plate 112 to be fixedly installed at the orifice of the exploration borehole 8. The drainage sleeve 11 is inserted into the borehole wall variable-diameter step 81 of the exploration borehole 8 through the tapered butt joint 111, and becomes a part of the borehole wall. The inner bottom surface of the liquid discharge chamber 13 is higher than that of the circulating drainage groove 12, so as to avoid backflow of the drilling fluid. The circulating drainage groove 12 is a three-way groove, and is provided with three groove openings. The first groove opening 121 of the circulating drainage groove 12 is in communication with the region of the drainage sleeve 11 above the support ring plate 112, and the third groove opening 123 is connected with the upper end liquid inlet of the first filtration component 3. The second groove opening 122 of the circulating drainage groove 12 is in communication with the liquid discharge chamber 13, and is used for receiving the drilling fluid filtered out by the sample storage and filtration device 2.

[0041] The embodiment provides a drilling fluid recycling processing system for an exploration borehole. Figure 1 , Figure 4 and Figure 5 As shown in the figure, the sample storage and filtration device 2 comprises a sample storage box 21, a filtration box 22 and a sample drilling fluid recovery box 23. The sample storage box 21 is arranged in the filtration box 22, and a plurality of sample storage grooves are arranged in the sample storage box 21. A plurality of water draining holes 211 are arranged in the inner groove surface of each sample storage groove. The filtration box 22 is provided with an upper large and lower small filtration cavity 221. The sample storage box 21 is arranged at the large liquid inlet cavity opening of the upper part of the filtration cavity 221. Each water draining hole 211 is in communication with the liquid inlet cavity opening of the filtration cavity 221. A filter screen 222 is arranged at the lower small liquid outlet cavity opening of the filtration cavity 221. The sample drilling fluid recovery box 23 is arranged below the filtration box 22, and the liquid inlet of the sample drilling fluid recovery box 23 is opposite to the liquid outlet cavity opening of the filtration cavity 221. The drilling fluid filtered by the sample drilling fluid recovery box 23 is poured into the drilling fluid drainage device 1. The sample storage groove is a semicylindrical groove, and a plurality of sample storage grooves are arranged in parallel in the sample storage box 21. The filtration cavity 221 is an inverted trapezoidal cavity. The filtration box 22 is arranged at the large cavity opening of the upper part of the filtration cavity 221. The bottom of the filtration box 22 is provided with a support column. The sample drilling fluid recovery box 23 is arranged directly below the filter screen 222.

[0042] The embodiment provides a drilling fluid recovery processing system for exploration drilling holes, which comprises a circulating flow channel 1, a first filtering component 3, a second filtering component 4 and a third filtering component 5. Figure 1 and Figure 6 As shown in the figure, the first filtering component 3 is an inclined groove body with a narrow upper part and a wide lower part, and a transverse groove 31 is arranged on the inclined bottom surface of the groove body. The first filtering component 3 is provided with a liquid inlet narrow port 32 at the upper end and a liquid outlet wide port 33 at the lower end. The liquid inlet narrow port 32 at the upper end is connected with one of the groove openings of the circulating flow channel 12, and is used for guiding the drilling fluid returned during the drilling and sampling of the exploration drilling hole 8 into the first filtering component 3. The liquid outlet wide port 33 is connected with the liquid inlet of the second filtering component 4. Figure 7 and Figure 8 As shown in the figure, the second filtering component 4 is a square filtering box with double filtering screens, and the liquid inlet is arranged at the upper part of the filtering box, and the liquid outlet is arranged at the lower part of the filtering box and is connected with the liquid inlet of the third filtering component 5. The square filtering box of the second filtering component 4 is an open-top box structure, and a first matching joint gap 43 matched with the first filtering component 3 is arranged at the position adjacent to the open top of the square filtering box. The liquid outlet of the first filtering component 3 is connected with the first matching joint gap 43 of the square filtering box. A horizontal filtering screen 41 is arranged in the box body of the square filtering box. The liquid outlet of the square filtering box is arranged at the bottom of the side surface of the box body, and a vertical filtering screen 42 is arranged at the liquid outlet. The horizontal filtering screen 41 is arranged at a position lower than the first matching joint gap 43 and higher than the vertical filtering screen 42. The bottom of the square filtering box is an inclined slope surface 44, and the low end of the inclined slope surface is adjacent to the vertical filtering screen 42.

[0043] The embodiment provides a drilling fluid recovery processing system for exploration drilling holes, which comprises a circulating flow channel 1, a first filtering component 3, a second filtering component 4 and a third filtering component 5. Figure 1 , Figures 9 to 12As shown, the third filtering component includes an obliquely arranged box structure 52, the low end bottom of the box structure 52 is provided with a liquid inlet and is communicated with the liquid outlet of the second filtering component 4, the high end top of the box structure 52 is provided with a liquid outlet and is communicated with the liquid inlet of the sediment tank 6; the liquid inlet and the liquid outlet of the box structure 52 are communicated through an S-shaped liquid channel 51 arranged in the box structure, a filtering fine mesh 53 is arranged in the S-shaped liquid channel 51, an impeller assembly 55 is installed at each inflection point of the S-shaped liquid channel 51, and a power mechanism 54 is arranged on the box structure 52, the power mechanism 54 drives each inflection point to install the impeller assembly 55 to rotate at the same time through a transmission mechanism, and the drilling fluid at the liquid inlet of the box structure 52 is transported to the liquid outlet. The power mechanism 54 includes a motor 541 and a main drive belt pulley 543 arranged on the output shaft of the motor, the motor 541 is installed in the middle of the box structure 52 through a motor fixing frame 542, and the main drive belt pulley 543 is a double-groove belt pulley. The impeller assembly 55 includes an impeller shaft 552 and impellers 551 distributed on the impeller shaft 552, the impeller shaft 552 is horizontally installed at the inflection of the S-shaped liquid channel 51, the length of the impeller shaft 552 matches the width of the S-shaped liquid channel 51, and both ends are rotatably installed on the side wall of the box structure 52, one end of the impeller shaft 552 extends out of the box structure, and a key groove 553 is arranged at the extending end of the impeller shaft 552. The box structure 52 is a long strip-shaped box, the impeller assembly 55 is provided with four groups, which are arranged at the starting point, the ending point and the two turning points of the S-shaped liquid channel 51 respectively, two impeller assemblies 55 in each group are distributed on the two sides of the main drive belt pulley 543, and the two impeller assemblies 55 on the same side are arranged in correspondence with each other. The transmission mechanism includes transmission gears 58 arranged at the extending end of each impeller shaft 552 outside the box structure 52 and first transmission belts 56 and second transmission belts 57 installed in the two belt mounting grooves of the main drive belt pulley 543, the transmission gears 58 on the two impeller shafts 552 on the same side of the drive belt pulley 543 are meshed with each other, a transmission wheel 59 is installed on any one of the impeller shafts 552 on each side of the drive belt pulley 543, and the first transmission belt 56 and the second transmission belt 57 are respectively connected with the two transmission wheels 59 through belt transmission. The four groups of impeller assemblies 55 are driven to rotate at the same time by the motor 541 through the first transmission belt 56 and the second transmission belt 57.

[0044] The embodiment provides a drilling fluid recycling system for exploration drilling. Figure 1 and Figure 13 As shown, the sediment tank 6 is an open-top box structure, one side adjacent to the open surface is provided with a second docking notch 61 matched with the liquid outlet of the third filtering component 5, the liquid outlet of the third filtering component 5 is sealingly docked with the second docking notch 61, a siphon pipe 63 is arranged in the sediment tank 6 and is communicated with the liquid storage tank 7 through the siphon pipe 63, and the pipe opening of the siphon pipe 63 is located above the middle of the sediment tank 6.Figure 14 The liquid storage tank 7 is used for storing the treated drilling fluid, the inner bottom surface of the liquid storage tank 7 is a slope surface, and the lowest point of the slope surface is adjacent to one side wall, and a liquid discharge gate 71 is arranged at the bottom of the side wall.

[0045] The working process of the present application is as follows: the drilling fluid in the exploration borehole is introduced into the first filtering component through the drilling fluid guiding device 1, when the drilling fluid flows through the slope surface of the first filtering component 3, the flow cross section gradually increases, the flow velocity gradually decreases, and the flow surface is undulating, so that the large particle size substances carried in the drilling fluid are separated and retained due to the slow flow velocity and friction, and the remaining drilling fluid continues to flow downward into the second filtering component 4; the horizontal filter screen 41 in the second filtering component 4 is located in the middle of the box in the horizontal direction, the drilling fluid flows downward from the liquid inlet, and the next large particle size substances are blocked, the drilling fluid flows to the bottom of the filtering box, the bottom surface of the box is a slightly right-tilted slope surface, the drilling fluid flows to the lower right side to the lower outlet and enters the S-shaped liquid channel of the third filtering component 5, and the vertical filter screen 42 of the outlet blocks the small particle size substances again. The third filtering component 5 relies on the motor 541 to control the rotation of the belt pulley 543, the power is transmitted to the transmission wheels 59 on the two impeller shafts 552 on the two sides of the motor 541 through the first transmission belt 56 and the second transmission belt 57, the transmission wheels 59 drive the corresponding impeller shafts 552 to rotate, the impeller shafts 552 transmit the power to the impeller 551 and the transmission gear 58 mounted on the impeller shaft, the transmission gear 58 drives the transmission gear meshing therewith to rotate in the opposite direction, thereby transmitting the power to the adjacent impeller assembly below the impeller assembly 55, and driving the adjacent impeller assembly to rotate, so that the four sets of impeller assemblies 55 are driven to rotate by the motor 541. The drilling fluid in the third filtering component 5 flows upward in the bottom channel and downward in the middle channel under the action of the rotary impeller, and a fine filter screen 53 is arranged in the middle channel to block the small particles at the upper end of the middle channel, and then the upper channel continues to flow upward, and finally the drilling fluid flows into the sedimentation tank 6 after being lifted twice. The sedimentation tank 6 is a sedimentation tank and a siphon pipe 63, the siphon pipe communicates the sedimentation tank and the liquid storage tank 7, the siphon pipe opening is located in the upper middle of the sedimentation tank, after the drilling fluid flows into the sedimentation chamber from the second butt joint gap 61, the particles move downward and the clear liquid moves upward, and as the amount of drilling fluid in the sedimentation tank increases, the clear liquid surface of the drilling fluid contacts the siphon pipe 63, and the drilling fluid is sucked into the pipe under the siphon effect and finally flows to the liquid storage tank 7. The liquid storage tank 7 is used for storing the drilling fluid, the mud pump pumps the drilling fluid for drilling, and the recovered and filtered drilling fluid flows to this place for recycling. The inner bottom surface of the liquid storage tank is a slope surface, the slope bottom surface is adjacent to one side wall, and the bottom of the side wall has a liquid discharge gate 71, which facilitates the discharge of the waste drilling fluid after the drilling is completed.

[0046] The embodiment provides a drilling fluid recycling method for exploration drilling, which uses the drilling fluid recycling system for exploration drilling to recycle drilling fluid in the sampling process of exploration drilling.

[0047] S1. After the drilling machine is positioned at the drilling hole, the drilling machine penetrates the surface hardening layer to form the exploration drilling hole by using the opening rough pipe dry drilling, then the drainage casing is inserted into the support ring plate to contact the hole wall hardening layer surface around the hole mouth, and the first filter part, the second filter part, the third filter part, the sediment tank and the liquid storage tank are sequentially arranged beside the drilling machine.

[0048] S2. The core tube is replaced, the drilling fluid is added into the liquid storage tank, and then the drilling fluid circulation drilling is started to drill the hole, in the drilling process, the mud pump pumps the drilling fluid from the liquid storage tank into the drill pipe, and then the drilling fluid flows out from the drill bit at the bottom of the hole, carries the cutting materials and returns along the hole wall, the drainage casing is inserted into the hole wall variable diameter part to become part of the hole wall by using the variable diameter operation after the hole opening, the drilling fluid continues to return to the circulation drainage groove in the drainage casing, and then flows into the first filter part through the circulation drainage groove and then flows into the second filter part.

[0049] S3. When the drilling fluid in the box of the second filter part exceeds half, the motor of the third filter part is started, the motor drives the impeller assembly at each inflection point of the S-shaped liquid channel through the transmission mechanism, so that the drilling fluid is sucked into the S-shaped liquid channel of the third filter part, and under the action of the rotating force of the impeller, the drilling fluid is filtered and lifted to the liquid inlet height of the sediment tank and then flows into the sediment tank, and as the liquid level of the drilling fluid in the sediment tank rises, the upper clear liquid in the sediment tank is sucked into the liquid storage tank under the action of the siphon, and the circulation is continued.

[0050] S4. The drilling machine continues to drill, the drilling fluid returning to the hole mouth continuously flows to the filter device and finally returns to the liquid storage tank for further circulation; after the core tube is filled with samples, the drilling is lifted and the remaining drilling fluid in the tube is recovered. Then continue to drill, finally drill to the designed hole depth, and the drilling is ended. The drilling fluid in the filter part is circulated to the liquid storage tank. The soft pipe connected at the liquid discharge gate of the liquid storage tank discharges the waste drilling fluid to the municipal sewage pipe network, and the drilling cuttings in the filter screen and the box are cleaned.

[0051] S5. During the drilling and sampling process, when the core tube is filled with samples, the drilling is lifted and the lower opening of the core tube is placed into the sample storage groove of the sample storage box, the samples are taken out by knocking or water pressure and placed in the sample storage box, the remaining drilling fluid in the core tube enters the filter box through the draining holes in the bottom surface of the sample storage groove, and finally flows into the sample drilling fluid recovery box through the filter screen, and then the drilling fluid collected in the sample drilling fluid recovery box is poured into the liquid storage chamber for filtering and recycling.

[0052] The present application is aimed at the extremely high safety, civilization, environmental protection construction requirements in the urban and rural area surveying field drilling, and proposes a surveying drilling machine operation device with environmental protection and water saving structure and an operation method thereof. The device and method can ensure that there is no drilling fluid discharge and no pollution on the ground within the drilling operation range in the urban and rural area surveying, and can filter and precipitate the residue carrying drilling fluid and the remaining drilling fluid of the coring pipe for recycling, thereby reducing the overall amount of drilling fluid. After the practical popularization and application in the surveying engineering drilling field of a municipal water supply project, the drilling machine using the present application can normally filter and circulate the drilling fluid in the device during drilling, there is no drilling fluid leakage and pollution on the ground within the operation range, and the consumption of drilling fluid is only 1 / 2 to 1 / 3 of that of the drilling machine without using the method. The deeper the drilling depth, the greater the difference.

[0053] The above is only one embodiment of the present application, which is described in more detail, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A drilling fluid recycling system for use in exploration drilling, for recycling drilling fluid during coring of an exploration borehole (8), characterised in that: The recovery treatment system comprises a drilling fluid flow guide device (1), a first filter component (3), a second filter component (4), a third filter component (5) and a sediment tank (6); The drilling fluid flow guide device (1) comprises a flow guide sleeve (11) and a circulating flow guide groove (12), the lower end of the flow guide sleeve (11) is provided with a tapered butt joint (111), and a support ring plate (112) is arranged at the boundary position of the tapered butt joint (111); the flow guide sleeve (11) is inserted into the exploration borehole (8) through the tapered butt joint (111), and is supported by the support ring plate (112) to be fixedly installed at the orifice of the exploration borehole (8) on the hardening layer (9) of the hole wall around the orifice; one end of the circulating flow guide groove (12) is communicated with the region of the flow guide sleeve (11) above the support ring plate (112), and the other end is communicated with the liquid inlet of the first filter component (3), so as to introduce the drilling fluid returned during the drilling sampling of the exploration borehole (8) into the first filter component (3); the first filter component (3) is an inclined tank body with high end and low end, and a transverse groove (31) is continuously arranged on the inclined bottom surface of the tank body, the liquid inlet of the first filter component (3) is arranged at the high end, the liquid outlet is arranged at the bottom end, the liquid outlet is communicated with the liquid inlet of the second filter component (4); the second filter component (4) is a square filter box containing double filter screens, the liquid inlet is arranged at the upper part of the filter box, the liquid outlet is arranged at the lower part of the filter box, and the liquid outlet is communicated with the liquid inlet of the third filter component (5); The third filter component comprises an inclined box structure (52), the low end of the box structure (52) is provided with a liquid inlet, which is communicated with the liquid outlet of the second filter component (4), the high end of the box structure (52) is provided with a liquid outlet, which is communicated with the liquid inlet of the sediment tank (6); the liquid inlet and the liquid outlet of the box structure (52) are communicated through an S-shaped liquid channel (51) arranged in the box structure, a fine filter screen (53) is arranged in the S-shaped liquid channel (51), an impeller assembly (55) is arranged at each inflection point of the S-shaped liquid channel (51), and a power mechanism (54) is arranged on the box structure (52), the power mechanism (54) drives the impeller assembly (55) arranged at each inflection point to rotate at the same time, and the drilling fluid in the liquid inlet of the box structure (52) is transported to the liquid outlet.

2. A drilling fluid recovery processing system for use in exploration drilling according to claim 1, characterized in that: The system further comprises a storage filter device (2) for the sampling sample of the exploration borehole, the storage filter device (2) for the sampling sample of the exploration borehole comprises a sample storage box (21), a filter box (22) and a sample drilling fluid recovery box (23), the sample storage box (21) is arranged in the filter box (22), a plurality of sample storage grooves are arranged in the sample storage box (21), a plurality of draining holes (211) are arranged on the inner groove surface of each sample storage groove; the filter box (22) is internally provided with a filter cavity (221) which is large at the upper portion and small at the lower portion, the sample storage box (21) is embedded at the large liquid inlet cavity opening at the upper portion of the filter cavity (221), each draining hole (211) is in communication with the liquid inlet cavity opening of the filter cavity (221), and a filter screen (222) is arranged at the liquid outlet cavity opening at the lower portion of the filter cavity (221); the sample drilling fluid recovery box (23) is arranged below the filter box (22), and the liquid inlet opening of the sample drilling fluid recovery box (23) is opposite to the liquid outlet cavity opening of the filter cavity (221); after the drilling fluid filtered by the sampling sample of the exploration borehole is received by the sample drilling fluid recovery box (23), the drilling fluid is poured into the drilling fluid drainage device (1).

3. A drilling fluid recovery processing system for use in exploration drilling according to claim 1 or 2, characterized in that: The system further comprises a liquid storage tank (7) for storing the treated drilling fluid; the inner bottom surface of the liquid storage tank (7) is a slope surface, the lowest point of the slope surface is adjacent to one side wall, and a liquid discharge gate (71) is arranged at the bottom of the side wall; the sediment tank (6) is an open-top tank structure, one side adjacent to the open top is provided with a second butt joint gap (61) matched with the liquid outlet opening of the third filter component (5), the liquid outlet opening of the third filter component (5) is in sealed butt joint with the second butt joint gap (61), a siphon pipe (63) is arranged in the sediment tank (6) and is in communication with the liquid storage tank (7) through the siphon pipe (63), and the pipe opening of the siphon pipe (63) is located at the upper middle portion of the sediment tank (6).

4. A drilling fluid recovery processing system for use in exploration drilling according to claim 1 or 2, characterized in that: The drainage sleeve (11) is inserted into the hole wall variable-diameter step (81) of the exploration borehole (8) through the conical butt joint opening (111); the first filter component (3) is a groove structure which is narrow at the upper portion and wide at the lower portion, the upper end is provided with a liquid inlet narrow opening (32), and the lower end is provided with a liquid outlet wide opening (33), the liquid inlet narrow opening (32) at the upper end is in butt joint with one of the groove openings of the circulating drainage groove (12), and the liquid outlet wide opening (33) is in butt joint with the liquid inlet opening of the second filter component (4).

5. A drilling fluid recovery processing system for use in exploration drilling according to claim 1 or 2, characterized in that: The square filter box of the second filter component (4) is an open-top tank structure, a first butt joint gap (43) matched with the first filter component (3) is arranged at the position adjacent to the open top of the square filter box, and the liquid outlet opening of the first filter component (3) is in butt joint with the first butt joint gap (43) of the square filter box; a horizontal filter screen (41) is arranged in the tank body of the square filter box, the liquid outlet opening of the square filter box is arranged at the bottom of the side surface of the tank body, a vertical filter screen (42) is arranged at the liquid outlet opening, the horizontal filter screen (41) is arranged at a position lower than the first butt joint gap (43) and higher than the vertical filter screen (42), and the bottom of the square filter box is an inclined slope surface (44), and the low end of the inclined slope surface is adjacent to the vertical filter screen (42).

6. A drilling fluid recovery processing system for use in exploration drilling according to claim 1 or 2, characterized in that: The power mechanism (54) comprises a motor (541) and a main drive pulley (543) arranged on the output shaft of the motor, the motor (541) is installed in the middle of the box structure (52) through a motor fixing frame (542), and the main drive pulley (543) is a double-groove pulley; the impeller assembly (55) comprises an impeller shaft (552) and impellers (551) distributed on the impeller shaft (552), the impeller shaft (552) is horizontally installed at the turning of the S-shaped liquid channel (51), the length of the impeller shaft (552) matches the width of the S-shaped liquid channel (51), and the two ends of the impeller shaft (552) are rotatably installed on the side walls of the box structure (52), one end of the impeller shaft (552) extends out of the box structure, and a key groove (553) is arranged at the extending end of the impeller shaft (552); the box structure (52) is a long strip-shaped box, the impeller assembly (55) is provided with four groups, and is arranged at the starting point, the ending point and the two turning points of the S-shaped liquid channel (51) respectively, two groups of the four groups of impeller assemblies (55) are distributed on the two sides of the main drive pulley (543), and the two groups of impeller assemblies (55) on the same side are correspondingly arranged in up and down directions; the transmission mechanism comprises transmission gears (58) arranged at the ends of the impeller shafts (552) extending out of the box structure (52) respectively, and first and second transmission belts (56) and (57) installed in the two belt mounting grooves of the main drive pulley (543) respectively, the transmission gears (58) on the two impeller shafts (552) on the same side of the drive pulley (543) are meshed with each other, a transmission wheel (59) is installed on any one of the impeller shafts (552) on each side of the drive pulley (543), and the first and second transmission belts (56) and (57) are respectively connected with the two transmission wheels (59) in a belt transmission mode; the four groups of impeller assemblies (55) are simultaneously driven to rotate by the motor (541) through the first and second transmission belts (56) and (57).

7. A drilling fluid recovery processing system for use in exploration drilling according to claim 2, characterized in that: The drilling fluid drainage device (1) further comprises a liquid discharge chamber (13), the inner bottom surface of the liquid discharge chamber (13) is higher than that of the circulating drainage groove (12), the circulating drainage groove (12) is a three-way groove and is provided with three groove openings; the first groove opening (121) of the circulating drainage groove (12) is in communication with the upper part of the drainage sleeve (11), the third groove opening (123) is connected with the upper end liquid inlet of the first filtering component (3), and the drilling fluid and the remaining drilling fluid in the core barrel returned during the drilling sampling of the exploration borehole (8) are transported to the liquid inlet narrow opening (32) of the first filtering component (3); the second groove opening (122) of the circulating drainage groove (12) is in communication with the liquid discharge chamber (13) and is used for receiving the drilling fluid filtered out by the sample storage and filtration device (2).

8. A drilling fluid recovery processing system for use in exploration drilling according to claim 2, characterized in that: The sample storage groove is a semicylindrical groove, and a plurality of sample storage grooves are distributed in parallel in the sample storage box (21); the filtering cavity (221) is an inverted trapezoidal cavity, the filtering box (22) is clamped at the large cavity opening of the upper part of the filtering cavity (221), the bottom of the filtering box (22) is provided with a supporting column, and the sample drilling fluid recovery box (23) is located directly below the filter screen (222).

9. A method for recovering drilling fluid from an exploratory borehole, the method comprising: The method uses the drilling fluid recycling system for exploration drilling holes according to any one of claims 1 to 6 to The drilling fluid is recycled during the sampling process of the exploration drilling hole, and the specific steps are as follows: S1. After the drilling machine is positioned at the drilling hole, the opening rough diameter pipe is used to drill through the surface hardening layer to form an exploration drilling hole, then the drainage casing is inserted into the support ring plate to contact the hole wall hardening layer of the hole mouth, and the first filter part, the second filter part, the third filter part, the sediment tank and the liquid storage tank are sequentially placed beside the drilling machine; S2. Replace the core tube with a small diameter, add drilling fluid to the liquid storage tank, and start drilling fluid circulation drilling to drill the hole. During the drilling sampling process, the mud pump pumps the drilling fluid from the liquid storage tank into the drill pipe, and the drilling fluid flows out from the drill bit at the bottom of the hole, carrying the cutting materials up the hole wall. The variable diameter operation after the hole opening is used to insert the lower end of the drainage casing into the hole wall variable diameter part to become part of the hole wall. The drilling fluid continues to return to the circulation drainage groove in the drainage casing, and then flows into the first filter part through the circulation drainage groove, and then flows into the second filter part; S3. When the drilling fluid in the box of the second filter part exceeds half, start the motor of the third filter part. The motor drives the impeller assembly at each inflection point of the S-shaped liquid channel through the transmission mechanism, thereby sucking the drilling fluid into the S-shaped liquid channel of the third filter part. Under the action of the impeller rotation force, the drilling fluid is filtered and lifted to the liquid inlet height of the sediment tank and flows into the sediment tank. As the liquid level of the drilling fluid in the sediment tank rises, the upper clear liquid in the sediment tank is sucked into the liquid storage tank under the action of the siphon, and the circulation continues.

10. A method of drilling fluid recovery from an exploratory borehole according to claim 9, wherein: During the drilling and sampling process, when the core tube is full of samples, the drill is lifted and the lower end of the core tube is placed into the sample storage groove of the sample storage box. The samples are taken out by knocking or water pressure and placed in the sample storage box. The remaining drilling fluid in the core tube enters the filter box through the draining holes in the bottom surface of the sample storage groove, and finally flows into the sample drilling fluid recovery box through the filter screen. Then the drilling fluid collected in the sample drilling fluid recovery box is poured into the liquid storage room for filtration and recovery.

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