An oil drilling mud treatment system

Abstract

The present invention relates to the technical field of mud dehydration, and specifically relates to an oil drilling mud treatment system; it includes a dehydration kettle, the dehydration kettle includes a kettle body, and a kettle cover is fixedly installed at the upper end of the kettle body; a stirring rod is arranged inside the kettle body; the stirring rod is rotationally connected to the kettle cover; through the arrangement of the liquid discharge barrel and the pressing plate in the present invention, the pressing plate can squeeze the oil-containing liquid in the upper layer of the mud and the intermediate water phase layer to flow above the pressing plate through the filtrate port, and then the pressing plate pushes the oil-containing mixed liquid above to rise, so that the mixed liquid flows into the liquid discharge barrel through the upper port of the dehydration barrel and is discharged, thus eliminating the need to use a liquid suction pipe, avoiding the backflow of the oil drilling mud into the inside of the liquid suction pipe through the lower port of the liquid suction pipe, enabling the oil drilling mud in the dehydration barrel to fully combine with the flocculant, and enabling the sludge in the mud to be quickly flocculated into agglomerated floccules, accelerating the efficiency of the separation of water and mud in the mud; furthermore, the treatment efficiency of the oil drilling mud is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mud dewatering, and specifically to an oil drilling mud treatment system. Background Art

[0002] During the exploitation and storage of oil, a large amount of mud with a high content of petroleum hydrocarbons is generated. This mud mainly contains clay, weighting materials, drill cuttings, sewage, waste oil, and various chemical additives; among them, hydrocarbons, salts, various polymers, and heavy metal ions such as mercury, copper, arsenic, chromium, zinc, and lead are important pollution sources. If not properly treated, it will have a serious impact on the soil, vegetation, groundwater, surface water, farmland, etc. around the well site.

[0003] Currently, the main treatment method for drilling waste mud is to first screen the oil drilling mud to remove particulate matters such as sand and gravel, and then add a solidifying agent to the oil drilling mud for solidification treatment to obtain the required oily sludge. The treatment methods for oily sludge can be divided into physical methods, chemical methods, and biological methods, etc.; among them, physical methods include landfill, hot alkaline water washing, concentration and drying, etc.; chemical methods include incineration, pyrolysis, thermal desorption, etc.; biological methods include biotillage method, bioflotation method, etc.

[0004] In the prior art, there have also been some technical solutions regarding oil drilling mud treatment devices. For example, a Chinese patent with the publication number CN220467795U discloses an oil drilling waste mud treatment device, a protective housing. A recovery mechanism is arranged inside the protective housing, and a discharging mechanism is arranged on the top of the protective housing. The recovery mechanism includes a recovery tank. A feed pipe is fixedly connected to the upper surface of the recovery tank, a discharge pipe is fixedly connected to the lower surface of the recovery tank, a limiting support plate is rotatably connected to the bottom of the recovery tank, and above the limiting support plate, there is a limiting ring fixedly connected to the protective housing. Several first height adjustment members for cooperating with the limiting support plate to adjust the height of the recovery tank are arranged on the lower surface of the limiting ring. Several second mixing blocks are arranged on the inner wall of the recovery tank; the structure of the present invention is simple and easy to use. When in use, through the mutual cooperation of multiple structures, the full mixing of waste mud and flocculant is realized, and the recovery effect of the oil component in the waste mud is improved; however, because the liquid extraction pipe has been located in the recovery mechanism all the time, when the liquid level of the oil drilling mud is higher than the lower end pipe orifice of the liquid extraction pipe, it will cause the oil drilling mud to backflow into the inside of the liquid extraction pipe from the lower port of the liquid extraction pipe, resulting in the ineffective mixing of the oil drilling mud backflowing into the inside of the liquid extraction pipe with the flocculant, thereby reducing the oil removal and dehydration effects of this technical solution on the mud.

[0005] In addition, after a flocculant is added to the oil drilling mud, stratification will occur. The substances settling from top to bottom include the upper layer of oil-containing liquid, the middle water phase layer, and the lower solid sediment. The middle water phase layer often contains fine solid particles and flocs. When the user sucks in oil and water with a liquid suction pipe, the solid particles and flocs in the middle water phase layer will enter the liquid suction pipe and accumulate in the pipeline of the liquid suction pipe, resulting in the problem of blockage of the liquid suction pipe, which in turn affects the effective discharge of the separated oil and water by the liquid suction pipe.

[0006] In view of this, in order to overcome the above technical problems, the present invention proposes an oil drilling mud treatment system, which solves the above technical problems. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art, the present invention proposes an oil drilling mud treatment system. Through the setting of the drainage barrel and the pressing plate, the pressing plate can squeeze the upper oil-containing liquid and the middle water phase layer in the mud to flow above the pressing plate through the filtrate port. Subsequently, the pressing plate pushes the oil-containing mixed liquid above to rise, so that the mixed liquid flows into the drainage barrel through the upper port of the dehydration barrel and is discharged, thus eliminating the need to use a liquid suction pipe and avoiding the backflow of the oil drilling mud into the inside of the liquid suction pipe through the lower port of the liquid suction pipe. This enables the oil drilling mud in the dehydration barrel to fully combine with the flocculant, making the sludge in the mud quickly flocculate into flocs in a lump, accelerating the efficiency of the separation of mud and water in the mud, and further improving the treatment efficiency of the oil drilling mud.

[0008] The technical solution adopted by the present invention to solve its technical problems is as follows: An oil drilling mud treatment system described in the present invention includes a dehydration kettle, and the dehydration kettle includes:

[0009] A kettle body, with a kettle cover fixedly installed at the upper end of the kettle body; a stirring rod is arranged inside the kettle body; the stirring rod is rotatably connected to the kettle cover; a driving motor is fixedly installed at the upper end of the kettle cover; the driving motor is used to drive the stirring rod to rotate; a feed port is opened at the upper end of the kettle body; a discharge port is opened at the lower end of the kettle body.

[0010] A dewatering barrel, the dewatering barrel is located inside the kettle body; the dewatering barrel is fixedly installed at the lower end of the kettle body through a hydraulic push rod; the stirring rod is located inside the dewatering barrel; the dewatering barrel and the discharge port are communicated through a first connecting pipe; a liquid discharge barrel is fixedly connected to the outer wall of the dewatering barrel; a liquid discharge port is opened at the bottom of the liquid discharge barrel; a pipeline communicated with the liquid discharge port is installed on the side wall of the kettle body; the liquid discharge port and the pipeline are communicated through a second connecting pipe; a pressing plate is slidably and sealingly connected inside the dewatering barrel; a filtrate port is opened on the surface of the pressing plate; a floating valve is slidably connected inside the filtrate port; a filter cloth is fixedly installed on the side of the pressing plate away from the kettle cover; the stirring rod and the pressing plate are rotatably and sealingly connected; a through groove is opened at the upper end of the pressing plate; the through groove and the feed port are communicated through a third connecting pipe; electromagnetic valves are fixedly installed inside the through groove, the liquid discharge port and the discharge port.

[0011] Preferably, a rotating ring is arranged between the stirring rod and the pressing plate; the stirring rod is slidably and sealingly connected with the rotating ring; the rotating ring is rotatably and sealingly connected with the pressing plate; a slot is opened on the surface of the stirring rod; a plug rod is slidably and sealingly connected inside the slot; the plug rod and the bottom of the slot are fixedly connected through a support spring; a clamping groove matched with the plug rod is opened on the inner wall of the inner ring of the rotating ring; an electromagnetic sheet is embedded at the bottom of the slot; a magnet is embedded at one end of the plug rod close to the bottom of the slot.

[0012] Preferably, an L-shaped block is rotatably connected to the upper end of the dewatering barrel; a rectangular groove is opened on the inner wall of the dewatering barrel; a rectangular block is slidably and sealingly connected inside the rectangular groove; the rectangular block and the bottom of the rectangular groove are connected through a fixing spring.

[0013] Preferably, a threaded groove is opened on the side of the pressing plate away from the kettle cover; a clamping plate is rotatably connected inside the threaded groove; the clamping plate is used for clamping the filter cloth.

[0014] Preferably, the clamping plate includes a lower bottom plate and an upper clamping ring; the upper clamping ring is threadedly connected with the lower bottom plate; the upper clamping ring is threadedly connected inside the threaded groove; a connecting hole is opened on the upper end surface of the lower bottom plate; an expansion block is slidably and sealingly connected inside the connecting hole; a fixing ring is arranged above the lower bottom plate; the expansion block is fixedly connected to the lower end surface of the fixing ring.

[0015] Preferably, a corrugated airbag is arranged inside the kettle body; an air inlet connected to an external delivery pump is formed on the surface of the corrugated airbag; the external delivery pump is used for delivering a flocculant; one end of the corrugated airbag is fixedly connected to a liquid discharge barrel, and the other end is fixedly connected to the inner wall of the kettle body; an air duct is formed inside the kettle body; one end of the air duct is communicated with the corrugated airbag, and the other end penetrates through to the upper end surface of the kettle body; a circular groove is formed on the lower end surface of the kettle cover; the stirring rod is rotationally and sealingly connected in the circular groove; air holes are formed on the lower end surface of the stirring rod; an annular groove is formed on the surface of the stirring rod; one end of the stirring rod where the annular groove is formed is located in the circular groove; the air holes are communicated with the circular groove through the annular groove; an air cavity facing the air duct is formed on the lower end surface of the kettle cover; one end of the air cavity far away from the air duct is communicated with the circular groove; one-way valves are fixedly installed in both the air inlet and the air holes.

[0016] Preferably, a plug is threadedly connected to one end of the air cavity far away from the circular groove; the end of the plug far away from the air cavity is slidably and sealingly connected in the air duct.

[0017] Preferably, a sealing plug is slidably and sealingly connected to one end of the air duct far away from the corrugated airbag; the sealing plug is connected to the inner wall of the air duct through a connecting spring; the cross-sectional shape of the plug is trapezoidal.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. Through the arrangement of the liquid discharge barrel and the pressing plate in the present invention, the pressing plate can squeeze the oil-containing liquid and the intermediate water phase layer in the upper layer of the mud to flow through the filtrate port to the upper part of the pressing plate, and then the pressing plate pushes the oil-containing mixed liquid above to rise, so that the mixed liquid flows into the liquid discharge barrel through the upper port of the dehydration barrel and is discharged, thus eliminating the need to use a liquid suction pipe and avoiding the backflow of the oil drilling mud into the inside of the liquid suction pipe through the lower port of the liquid suction pipe, enabling the oil drilling mud in the dehydration barrel to fully combine with the flocculant, so that the sludge in the mud can be quickly flocculated into a flocculent mass, accelerating the efficiency of the separation of mud and water; furthermore, the treatment efficiency of the oil drilling mud is improved.

[0020] 2. By setting the filter cloth to be detachable and replaceable in the present invention, the filter cloth can be replaced regularly to prevent the blockage of the filter holes of the filter cloth from affecting the filtering effect of the filter cloth; to ensure that the liquid in the mud can quickly pass through the filtrate port, accelerating the discharge speed of the liquid in the mud, and further accelerating the dehydration efficiency of the mud by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 is a perspective view of the present invention;

[0023] Figure 2 is a structural schematic diagram of the present invention;

[0024] Figure 3 is Figure 2 An enlarged view of part A in

[0025] Figure 4 A schematic structural view of the kettle body used in the present invention;

[0026] Figure 5 is Figure 4 An enlarged view of part B in

[0027] Figure 6 is Figure 4 An enlarged view of part C in

[0028] Figure 7 is Figure 4 An enlarged view of part D in

[0029] Figure 8 is Figure 4 An enlarged view of part E in

[0030] Figure 9 A schematic structural view of the clamping plate used in the present invention;

[0031] Figure 10 is Figure 9 An enlarged view of part F in

[0032] In the figure: 1. Kettle body; 11. Discharge port; 12. Dewatering barrel; 121. First connecting pipe; 13. Liquid discharge barrel; 131. Liquid discharge port; 132. Second connecting pipe; 133. Hydraulic push rod; 134. Pipeline; 14. Pressing plate; 141. Filtrate port; 142. Float valve; 143. Filter cloth; 144. Through groove; 145. Third connecting pipe; 146. Solenoid valve; 15. L-shaped block; 151. Rectangular block; 152. Rectangular groove; 153. Fixed spring; 16. Clamping plate; 161. Lower bottom plate; 162. Upper clamping ring; 163. Connecting hole; 164. Expansion block; 165. Fixed ring; 17. Air passage; 18. Sealing plug; 181. Connecting spring; 2. Kettle cover; 21. Stirring rod; 211. Slot; 212. Plug rod; 213. Support spring; 214. Electromagnetic sheet; 215. Magnet; 216. Air hole; 217. Annular groove; 22. Driving motor; 23. Feed port; 24. Rotating ring; 241. Card slot; 25. Threaded groove; 26. Corrugated airbag; 261. Air inlet; 27. Circular groove; 271. Air cavity; 28. Check valve; 29. Insertion pipe. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0034] AsFigures 1 to 10 As shown in the figure, a petroleum drilling mud treatment system according to the present invention includes a dehydration kettle, and the dehydration kettle includes:

[0035] A kettle body 1, on the upper end of the kettle body 1, a kettle cover 2 is fixedly installed; inside the kettle body 1, a stirring rod 21 is arranged; the stirring rod 21 is rotatably connected with the kettle cover 2; on the upper end of the kettle cover 2, a driving motor 22 is fixedly installed; the driving motor 22 is used to drive the stirring rod 21 to rotate; on the upper end of the kettle body 1, a feed port 23 is opened; at the lower end of the kettle body 1, a discharge port 11 is opened.

[0036] A dehydration barrel 12, the dehydration barrel 12 is located inside the kettle body 1; the dehydration barrel 12 is fixedly installed at the lower end of the kettle body 1 through a hydraulic push rod 133; the stirring rod 21 is located inside the dehydration barrel 12; between the dehydration barrel 12 and the discharge port 11, they are communicated through a first connecting pipe 121; on the outer wall of the dehydration barrel 12, a liquid discharge barrel 13 is fixedly connected; at the bottom of the liquid discharge barrel 13, a liquid discharge port 131 is opened; on the side wall of the kettle body 1, a pipeline 134 communicated with the liquid discharge port 131 is installed; between the liquid discharge port 131 and the pipeline 134, they are communicated through a second connecting pipe 132; inside the dehydration barrel 12, a pressing plate 14 is slidably and sealingly connected; on the surface of the pressing plate 14, a filtrate port 141 is opened; inside the filtrate port 141, a floating valve 142 is slidably connected; on the side of the pressing plate 14 away from the kettle cover 2, a filter cloth 143 is fixedly installed; between the stirring rod 21 and the pressing plate 14, they are rotatably and sealingly connected; on the upper end of the pressing plate 14, a through groove 144 is opened; between the through groove 144 and the feed port 23, they are communicated through a third connecting pipe 145; electromagnetic valves 146 are fixedly installed inside the through groove 144, the liquid discharge port 131 and the discharge port 11.

[0037] As an implementation manner of the present invention, between the stirring rod 21 and the pressing plate 14, a rotating ring 24 is arranged; the stirring rod 21 is slidably and sealingly connected with the rotating ring 24; the rotating ring 24 is rotatably and sealingly connected with the pressing plate 14; on the surface of the stirring rod 21, a slot 211 is opened; inside the slot 211, a plug rod 212 is slidably and sealingly connected; between the plug rod 212 and the bottom of the slot 211, they are fixedly connected through a support spring 213; on the inner wall of the inner ring of the rotating ring 24, a clamping groove 241 matching with the plug rod 212 is opened; on the bottom of the slot 211, an electromagnetic sheet 214 is inlaid; at one end of the plug rod 212 close to the bottom of the slot 211, a magnet 215 is inlaid.

[0038] As an implementation manner of the present invention, at the upper end of the dehydration barrel 12, an L-shaped block 15 is rotatably connected; inside the inner wall of the dehydration barrel 12, a rectangular groove 152 is opened; inside the rectangular groove 152, a rectangular block 151 is slidably and sealingly connected; between the rectangular block 151 and the bottom of the rectangular groove 152, they are connected through a fixing spring 153.

[0039] During operation, the existing liquid extraction pipe has always been located in the recovery mechanism. When the liquid level of the oil drilling mud is higher than the lower end pipe opening 134 of the liquid extraction pipe, it will cause the oil drilling mud to backflow into the interior of the liquid extraction pipe from the lower port of the liquid extraction pipe, resulting in the ineffective mixing of the oil drilling mud that has backflowed into the interior of the liquid extraction pipe with the flocculant, thereby reducing the oil removal and dehydration effects of the mud by this technical solution;

[0040] In response to this, the present invention, through the setting of the drainage bucket 13 and the pressing plate 14, enables the pressing plate 14 to squeeze the oil-containing liquid and the intermediate water phase layer in the upper layer of the mud to flow to the upper part of the pressing plate 14 through the filtrate port 141. Subsequently, the pressing plate 14 pushes the oil-containing mixed liquid above to rise, enabling the mixed liquid to flow into the drainage bucket 13 through the upper port of the dehydration bucket 12 and be discharged, thereby eliminating the need to use a liquid extraction pipe and avoiding the backflow of the oil drilling mud into the interior of the liquid extraction pipe through the lower port of the liquid extraction pipe, enabling the oil drilling mud in the dehydration bucket 12 to fully combine with the flocculant, and enabling the sludge in the mud to be rapidly flocculated into agglomerated flocs, accelerating the efficiency of the separation of mud and water in the mud; furthermore, improving the treatment efficiency of the oil drilling mud;

[0041] In the initial state, one end of the hydraulic push rod 133 is connected to the bottom of the kettle body 1, and the other end is connected to the lower end surface of the drainage bucket 13. The first connecting pipe 121, the second connecting pipe 132, and the third connecting pipe 145 are all bellows made of PTFE material. The hydraulic push rod 133 pushes the dehydration bucket 12 to rise to the maximum height, and the feeding port 23 is connected to the external mud conveying system through the pipe 134; the user uses a crane to lift the kettle cover 2 to the upper end of the kettle body 1. The discharge port 131 of the kettle body 1 is far from one end of the second connecting pipe 132 and is connected to the outside through the pipe 134; enabling the kettle cover 2 to drive the stirring rod 21 into the dehydration bucket 12 of the kettle body 1. Since the pressing plate 14 and the stirring rod 21 are rotationally and hermetically connected through the rotating ring 24, the stirring rod 21 pushes the pressing plate 14 into the dehydration bucket 12 through the rotating ring 24; since the inner wall of the dehydration bucket 12 is provided with a rectangular block 151, the rectangular block 151 can support the pressing plate 14; at this time, the user rotates the L-shaped block 15 so that the L-shaped block 15 rotates to the upper end surface of the pressing plate 14, enabling the L-shaped block 15 to block the upper end surface of the pressing plate 14; as the kettle cover 2 is continuously lowered, the kettle cover 2 drives the stirring rod 21 to continuously enter the dehydration bucket 12. Since the stirring rod 21 and the pressing plate 14 are connected through the rotating ring 24; and the rotating ring 24 is rotationally and hermetically connected to the pressing plate 14, while the stirring rod 21 is slidingly and hermetically connected to the rotating ring 24, so during the descent of the stirring rod 21, the stirring rod 21 and the rotating ring 24 slide relative to each other until the kettle cover 2 covers the upper end of the kettle body 1, and the kettle cover 2 is fixed to the upper end of the kettle body 1 using bolts;

[0042] Then, control the solenoid valve 146 in the through groove 144 to open and the solenoid valve 146 in the discharge port 11 to close. Then, control the external mud conveying system to convey mud through the feed port 23, the third connecting pipe 145, and the through groove 144 into the dehydration barrel 12. Then, add a flocculant into the dehydration barrel 12 through the feed port 23. When the addition of the mud and the flocculant is completed, control the solenoid valve 146 in the through groove 144 to close. At this time, control the drive motor 22 to drive the stirring rod 21 to rotate. Since the stirring rod 21 is rotatably connected to the pressing plate 14 through the rotating ring 24, during the rotation of the stirring rod 21, the stirring rod 21 drives the rotating ring 24 to rotate, so that the flocculant and the mud in the dehydration barrel 12 are fully mixed in the horizontal direction, causing the sludge in the mud to be quickly flocculated into a flocculent mass, making the rotating ring 24 and the pressing plate 14 rotate relative to each other, so that the pressing plate 14 will not be driven by the stirring rod 21 to rotate, making the pressing plate 14 in close contact with the inner wall of the dehydration barrel 12 to ensure the sealing performance inside the dehydration barrel 12 and prevent the mud or petroleum-containing liquid in the dehydration barrel 12 from overflowing between the pressing plate 14 and the inner wall of the dehydration barrel 12; ensure that the mud is fully flocculated in the dehydration barrel 12; during the rotation of the stirring rod 21, the hydraulic push rod 133 pushes the liquid discharge barrel 13 fixedly connected to it to slide up and down in the kettle body 1. Since the liquid discharge barrel 13 is fixedly connected to the outer wall of the dehydration barrel 12, the liquid discharge barrel 13 can drive the dehydration barrel 12 to slide up and down synchronously in the kettle body 1. Since the stirring rod 21 is connected to the kettle cover 2 and the stirring rod 21 is slidably and sealingly connected to the rotating ring 24, during the process of the dehydration barrel 12 driving the pressing plate 14 to move up and down, the pressing plate 14 drives the rotating ring 24 to slide up and down along the stirring rod 21, making the stirring rod 21 move up and down in the dehydration barrel 12; enabling the rotating stirring rod 21 to accelerate the full mixing of the mud and the flocculant in the dehydration barrel 12 in the vertical direction, so that the sludge in the mud and the flocculant are fully contacted and form flocs, and the formed flocs sink to the bottom of the dehydration barrel 12 under the action of their own gravity; since the density of petroleum is less than that of water, the petroleum-containing liquid floats to the upper layer. At this time, the substances in the dehydration barrel 12 from top to bottom are the upper petroleum-containing liquid, the middle water phase layer, and the lower solid precipitate;

[0043] When it is necessary to discharge the upper petroleum-containing liquid and the intermediate water phase layer, the user controls the hydraulic push rod 133 to drive the dehydration barrel 12 to descend to the lowest height through the liquid discharge barrel 13. At this time, the dehydration barrel 12 drives the rotating ring 24 to the slot 211 through the pressing plate 14. At this time, the inserting rod 212 is aligned with the card slot 241. Control the electromagnetic sheet 214 to be energized, so that the electromagnetic sheet 214 can generate the same magnetic pole as the magnet 215, so that the magnet 215 drives the inserting rod 212 to stretch the supporting spring 213 and extend out of the slot 211 under the push of the magnetic repulsive force, so that the inserting rod 212 extending out of the slot 211 can enter the card slot 241, so that the inserting rod 212 connects the stirring rod 21 and the rotating ring 24. Then control the hydraulic push rod 133 to push the liquid discharge barrel 13 to rise, so that the liquid discharge barrel 13 drives the dehydration barrel 12 to rise, so that the stirring rod 21 descends relative to the dehydration barrel 12, so that the stirring rod 21 drives the pressing plate 14 to descend through the rotating ring 24 connected thereto, so that the pressing plate 14 generates a squeezing force on the lower rectangular block 151; since the upper end of the rectangular block 151 is provided with an inclined surface, that is, the pressing plate 14 contacts the inclined surface end of the rectangular block 151, so that the pressing plate 14 generates a component force towards the rectangular groove 152 on the rectangular block 151 through the inclined surface end of the rectangular block 151, so that the rectangular block 151 squeezes the fixed spring 153 into the rectangular groove 152 under the push of the pressing plate 14. At this time, the pressing plate 14 is in sliding contact with the rectangular block 151; when the stirring rod 21 drives the pressing plate 14 to cross the rectangular block 151 through the rotating ring 24, the pressing plate 14 continuously approaches the upper liquid level in the dehydration barrel 12 until the pressing plate 14 contacts the liquid in the dehydration barrel 12, so that the liquid is squeezed by the pressing plate 14. At this time, the liquid will enter the filter liquid port 141, so that the liquid pushes the floating valve 142 in the filter liquid port 141 to rise, so that the filter liquid port 141 is opened. At this time, the petroleum-containing liquid passes through the filter liquid port 141 to the upper end surface of the pressing plate 14; since the intermediate water phase layer contains fine flocculants, and these tiny flocculants can effectively promote the aggregation of solid particles in the water phase layer to form larger precipitate masses; if these tiny flocculants are drawn out with the water phase layer, the solid particles in the water phase layer cannot effectively aggregate and precipitate, resulting in a reduction in dehydration efficiency; moreover, these tiny flocculants will increase the difficulty of subsequent treatment of the water phase layer and the petroleum-containing liquid. Therefore, a filter cloth 143 is fixedly connected to the lower end surface of the pressing plate 14, so that the filter cloth 143 can block and filter the tiny flocculants in the water phase layer, so that only the liquid can pass through the filter cloth 143 and reach the upper end of the pressing plate 14 through the filter liquid port 141;When the filter cloth 143 contacts the lower solid sediment, the pressing plate 14 descends the most, and the upper petroleum-containing liquid and the middle water phase layer in the dewatering barrel 12 pass through the filtrate port 141 to the upper end surface of the pressing plate 14. At this time, the hydraulic push rod 133 is controlled to contract, so that the hydraulic push rod 133 drives the dewatering barrel 12 to descend through the liquid discharge barrel 13, so that the pressing plate 14 rises relative to the dewatering barrel 12, so that the pressing plate 14 pushes the upper petroleum-containing liquid and the water phase layer to rise. At this time, the float valve 142 is no longer pushed by the liquid below, so that the float valve 142 falls into the filtrate port 141 under the action of its own gravity. At this time, the filtrate port 141 is blocked by the float valve 142, so when the pressing plate 14 pushes When the petroleum-containing liquid and the water phase layer rise, the petroleum-containing liquid and the water phase layer will not flow into the dewatering barrel 12 from the filtrate port 141. At this time, the petroleum-containing liquid and the water phase layer pushed by the pressing plate 14 will overflow from the barrel port of the dewatering barrel 12, so that the overflowed petroleum-containing liquid and the water phase layer flow into the drainage barrel 13. After the petroleum-containing liquid and the water phase layer flowing into the drainage barrel 13 are placed and layered, the electromagnetic valve 146 in the drainage port 131 is controlled to open, so that the layered petroleum-containing liquid and the water phase layer are discharged and collected in sequence through the drainage port 131, and then the discharged petroleum-containing liquid and the water phase layer are processed respectively, which reduces the subsequent separation steps of the petroleum-containing liquid and the water phase layer, thereby reducing The difficulty of treating the oil-containing liquid and water phase layer is improved, and the overall treatment efficiency of the oil drilling mud is improved; since the upper end surface of the pressure plate 14 is set as an inclined surface, when the pressure plate 14 rises to the rectangular block 151, the pressure plate 14 pushes the rectangular block 151 into the rectangular groove 152 through the inclined surface of the upper end surface, so that the pressure plate 14 slides and rises relative to the rectangular block 151 until the pressure plate 14 passes over the rectangular block 151. At this time, the rectangular block 151 is reset under the push of the restoring force of the fixed spring 153. At this time, the pressure plate 14 is stabilized again between the L-shaped block 15 and the rectangular block 151, so as to facilitate the next mud dehydration, and there is no need to use a suction pipe to extract the oil-containing liquid and water phase layer , avoiding the problem of clogging of the liquid extraction pipe, ensuring that the petroleum-containing liquid and the liquid in the water phase layer in the slurry can be quickly and effectively discharged; through the combined use of the dehydration kettle and the flocculant, the dehydration effect of the dehydration kettle on the sludge is greatly improved; the mud-water separation efficiency in the sludge is improved; and thus the treatment efficiency of the oil drilling mud of the present invention is improved; for the sludge flocs deposited at the bottom of the dehydration barrel 12, after the petroleum-containing liquid and the water phase layer are discharged, the discharge port 11 is opened, so that the sludge flocs deposited at the bottom of the dehydration barrel 12 are discharged and collected through the discharge port 11, and the collected sludge flocs need to be transported to the filter press process for further dehydration treatment. ;

[0044] As an embodiment of the present invention, a thread groove 25 is formed on a side of the pressing plate 14 away from the kettle cover 2 ; a clamping plate 16 is rotatably connected in the thread groove 25 ; and the clamping plate 16 is used to clamp the filter cloth 143 .

[0045] As an embodiment of the present invention, the clamping plate 16 includes a lower bottom plate 161 and an upper clamping ring 162; the upper clamping ring 162 is threadedly connected to the lower bottom plate 161; the upper clamping ring 162 is threadedly connected in the thread groove 25; a connection hole 163 is formed in the upper end surface of the lower bottom plate 161; an expansion block 164 is slidably and sealingly connected in the connection hole 163; a fixing ring 165 is arranged above the lower bottom plate 161; the expansion block 164 is fixedly connected to the lower end surface of the fixing ring 165;

[0046] During operation, with the long-term use of the filter cloth 143, tiny flocs will clog the filter holes of the filter cloth 143, thereby affecting the filtering effect of the filter cloth 143. To address this, the filter cloth 143 is set to be detachable and replaceable, so that the filter cloth 143 can be replaced regularly to prevent the clogging of the filter holes of the filter cloth 143 and affect the filtering effect of the filter cloth 143; to ensure that the liquid in the slurry can quickly pass through the filtrate port 141, accelerate the discharge speed of the liquid in the slurry, and thus speed up the dehydration efficiency of the present invention for the slurry; moreover, the regular replacement and cleaning of the filter cloth 143 can reduce the contact time between tiny flocs and dirt and the filter cloth 143, reduce the wear and corrosion caused by tiny flocs and dirt to the filter cloth 143, and thus improve the service life of the filter cloth 143; in the initial state, multiple groups of expansion blocks 164 are provided, and the number of each group of expansion blocks 164 is three. Threads are provided on the mutually approaching surfaces of the three expansion blocks 164. The filter cloth 143 is provided with a round hole facing the connection hole 163. The user first lays the filter cloth 143 flat on the lower bottom plate 161, so that the round hole on the surface of the filter cloth 143 is aligned with the connection hole 163 of the lower bottom plate 161, and then places the fixing ring 165 on the upper end of the filter cloth 143, so that the expansion block 164 at the lower end of the fixing ring 165 is inserted into the connection hole 163 of the lower bottom plate 161 through the round hole on the surface of the filter cloth 143. At this time, the user uses a screw, inserts it into the connection hole 163 from the end of the lower bottom plate 161 away from the filter cloth 143, so that the screw is threadedly connected to the expansion block 164, causing the adjacent three expansion blocks 164 to open in the direction away from each other under the extrusion of the screw, so that the expansion block 164 contacts and abuts against the inner wall of the connection hole 163, so that the fixing ring 165 is fixed to the lower bottom plate 161 and the filter cloth 143 is clamped on the upper end of the lower bottom plate 161. At this time, the upper clamping ring 162 is used, so that the upper clamping ring 162 is threadedly connected to the lower bottom plate 161; since the filter cloth 143 is set to be annular, the outer ring edge and the inner ring edge of the filter cloth 143 are fixed to the upper end of the lower bottom plate 161 by using two upper clamping rings 162. At this time, the filter cloth 143 is tightly laid flat on the lower bottom plate 161. The user aligns the upper clamping ring 162 with the thread groove 25, so that the upper clamping ring 162 is threadedly connected in the thread groove 25, and thus the filter cloth 143 fixed on the lower bottom plate 161 is threadedly connected to the lower end surface of the pressing plate 14 through the upper clamping ring 162.

[0047] As an implementation manner of the present invention, a corrugated airbag 26 is arranged inside the kettle body 1; an air inlet 261 connected to an external delivery pump is opened on the surface of the corrugated airbag 26; the external delivery pump is used for delivering a flocculant; one end of the corrugated airbag 26 is fixedly connected to the liquid discharge bucket 13, and the other end is fixedly connected to the inner wall of the kettle body 1; an air duct 17 is opened inside the kettle body 1; one end of the air duct 17 is communicated with the corrugated airbag 26, and the other end penetrates through to the upper end surface of the kettle body 1; a circular groove 27 is opened on the lower end surface of the kettle cover 2; the stirring rod 21 is rotationally and sealingly connected in the circular groove 27; an air hole 216 is opened on the lower end surface of the stirring rod 21; an annular groove 217 is opened on the surface of the stirring rod 21; one end of the stirring rod 21 provided with the annular groove 217 is located in the circular groove 27; the air hole 216 is communicated with the circular groove 27 through the annular groove 217; an air cavity 271 opposite to the air duct 17 is opened on the lower end surface of the kettle cover 2; one end of the air cavity 271 away from the air duct 17 is communicated with the circular groove 27; check valves 28 are fixedly installed in both the air inlet 261 and the air hole 216.

[0048] As an implementation manner of the present invention, an insertion tube 29 is threadedly connected to one end of the air cavity 271 away from the circular groove 27; one end of the insertion tube 29 away from the air cavity 271 is slidably and sealingly connected in the air duct 17.

[0049] As an implementation manner of the present invention, a sealing plug 18 is slidably and sealingly connected to one end of the air duct 17 away from the corrugated airbag 26; the sealing plug 18 is connected to the inner wall of the air duct 17 through a connecting spring 181; the cross-sectional shape of the insertion tube 29 is trapezoidal.

[0050] During operation, when the user covers the kettle lid 2 on the upper end of the kettle body 1, the user needs to control the insertion tube 29 at the lower end of the kettle lid 2 to be directly opposite to the port of the air duct 17 at the upper end of the kettle body 1 so that the insertion tube 29 is inserted into the air duct 17. Since a sealing plug 18 is installed at the port of the air duct 17, when the insertion tube 29 is inserted into the air duct 17, the insertion tube 29 will push the sealing plug 18 in the air duct 17 to squeeze the connecting spring 181 into the interior of the air duct 17. At this time, the insertion tube 29 is slidably and sealingly connected in the air duct 17. Because the cross-sectional shape of the insertion tube 29 is trapezoidal and the insertion tube 29 is communicated with the air cavity 271, the lower end surface of the insertion tube 29 will not be blocked by the sealing plug 18, thus ensuring that the insertion tube 29 can communicate the air cavity 271 with the air duct 17. In the initial state, when the flocculant is added into the kettle body 1 through the feed port 23, it is easy to cause the flocculant to not be fully mixed with the slurry at the bottom of the kettle body 1. To this end, the air inlet 261 of the corrugated airbag 26 is communicated with an external transfer pump through a trachea penetrating the kettle body 1, and the user uses the transfer pump to add the flocculant into the corrugated airbag 26. When the hydraulic push rod 133 pushes the drainage bucket 13 to slide up and down, the drainage bucket 13 will squeeze the corrugated airbag 26 below it, so that the flocculant in the corrugated airbag 26 enters the air cavity 271 through the air duct 17 and the insertion tube 29, so that the flocculant entering the air cavity 271 can enter the circular groove 27, and the flocculant in the circular groove 27 enters the air holes 216 through the annular groove 217 on the surface of the stirring rod 21, and the flocculant entering the air holes 216 is ejected from the end of the stirring rod 21 away from the kettle lid 2. Since the stirring rod 21 moves upward relative to the kettle body 1 at this time and is driven by the drive motor 22 to rotate, the ejected flocculant can rotate along the vertical direction and be fully mixed with the slurry, thereby improving the mixing effect of the flocculant and the slurry, ensuring that the slurry at the bottom of the kettle body 1 can also be fully mixed with the flocculant, and accelerating the flocculation efficiency of the sludge in the slurry. When the hydraulic push rod 133 pushes the drainage bucket 13 to rise, the drainage bucket 13 will pull the corrugated airbag 26 to stretch. To prevent the slurry from flowing back into the corrugated airbag 26 through the air holes 216, a one-way valve 28 is installed in the air holes 216, so that the one-way valve 28 can block the slurry from flowing back into the air holes 216. And a one-way valve 28 is installed in the air inlet 261 to prevent the flocculant from being ejected through the air inlet 261 due to the extrusion of the corrugated airbag 26, thereby ensuring that the flocculant can effectively flow into the dehydration bucket 12 from the air holes 216 to ensure that the flocculant can be fully mixed with the slurry, thereby improving the flocculation effect of the slurry. After the flocculant is completely discharged into the dehydration bucket 12, then control the transfer pump to send air into the corrugated airbag 26, so that the gas in the corrugated airbag 26 continuously enters the slurry in the form of bubbles through the air holes 216, so that the bubbles can drive the slurry to flow during the rising process to promote the mixing contact between the flocculant and sludge particles, etc., thereby improving the flocculation effect;Since the bubbles cause disturbances to the mud during the rising process, making it easier for the oil droplets to come into contact with the bubbles, and there is a relatively low interfacial tension between the oil and the bubbles, enabling the oil droplets to more easily adhere to the surface of the bubbles. Therefore, when the bubbles rise, they will capture and drive the oil-containing droplets adhering to their surface to rise, improving the separation efficiency of the oil-containing liquid, thereby enhancing the oil removal effect of the mud and further improving the practicality of the present invention.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the Figure 1 orientation or positional relationship shown, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petroleum drilling mud processing system, comprising a dehydration kettle, wherein the dehydration kettle comprises: A kettle body (1), wherein a kettle cover (2) is fixedly mounted on the upper end of the kettle body (1); a stirring rod (21) is arranged inside the kettle body (1); the stirring rod (21) is rotatably connected to the kettle cover (2); a driving motor (22) is fixedly mounted on the upper end of the kettle cover (2); the driving motor (22) is used to drive the stirring rod (21) to rotate; a feed inlet (23) is provided at the upper end of the kettle body (1); a discharge outlet (11) is provided at the lower end of the kettle body (1), characterized in that: A dewatering barrel (12), the dewatering barrel (12) being located inside the kettle body (1); the dewatering barrel (12) being fixedly mounted on the lower end of the kettle body (1) via a hydraulic push rod (133); the stirring rod (21) being located inside the dewatering barrel (12); the dewatering barrel (12) being connected to the discharge port (11) via a No. 1 connecting pipe (121); a drainage barrel (13) being fixedly mounted on the outer wall of the dewatering barrel (12); a drainage port (131) being provided at the bottom of the drainage barrel (13); a pipe (134) being connected to the drainage port (131) being mounted on the side wall of the kettle body (1); the drainage port (131) and the pipe (134) being connected via a No. 2 connecting pipe (132) ; The dewatering barrel (12) is internally slidably sealed with a pressing plate (14); a filtrate port (141) is provided on the surface of the pressing plate (14); a float valve (142) is slidably connected inside the filtrate port (141); a filter cloth (143) is fixedly installed on the side of the pressing plate (14) away from the kettle cover (2); the stirring rod (21) and the pressing plate (14) are rotatably sealed; a through groove (144) is provided at the upper end of the pressing plate (14); the through groove (144) and the feed port (23) are connected via a No. 3 connecting pipe (145); solenoid valves (146) are fixedly installed inside the through groove (144), the discharge port (131) and the discharge port (11); A rotating ring (24) is provided between the stirring rod (21) and the pressing plate (14); the stirring rod (21) and the rotating ring (24) are connected in a sliding and sealing manner; the rotating ring (24) and the pressing plate (14) are connected in a rotating and sealing manner; a slot (211) is provided on the surface of the stirring rod (21); an insertion rod (212) is connected in a sliding and sealing manner in the slot (211); the insertion rod (212) and the bottom of the slot (211) are fixedly connected via a supporting spring (213); a clamping groove (241) matching with the insertion rod (212) is provided on the inner ring wall of the rotating ring (24); an electromagnetic sheet (214) is embedded in the bottom of the slot (211); and a magnet (215) is embedded at one end of the insertion rod (212) close to the bottom of the slot (211).

2. A petroleum drilling mud processing system according to claim 1, characterized in that: The upper end of the dehydration barrel (12) is rotatably connected to an L-shaped block (15); the inner wall of the dehydration barrel (12) is provided with a rectangular groove (152); a rectangular block (151) is slidably and sealingly connected in the rectangular groove (152); the rectangular block (151) is connected to the bottom of the rectangular groove (152) via a fixing spring (153).

3. A petroleum drilling mud processing system according to claim 2, characterized in that: A threaded groove (25) is provided on a side of the pressing plate (14) away from the kettle cover (2); a clamping plate (16) is rotatably connected in the threaded groove (25); and the clamping plate (16) is used to clamp the filter cloth (143).

4. A petroleum drilling mud processing system according to claim 3, characterized in that: The clamping plate (16) comprises a lower base plate (161) and an upper retaining ring (162); the upper retaining ring (162) is threadedly connected to the lower base plate (161); the upper retaining ring (162) is threadedly connected in the thread groove (25); a connecting hole (163) is provided on the upper end surface of the lower base plate (161); an expansion block (164) is slidingly and sealingly connected in the connecting hole (163); a fixing ring (165) is provided above the lower base plate (161); the expansion block (164) is fixedly connected to the lower end surface of the fixing ring (165).

5. A petroleum drilling mud processing system according to claim 4, characterized in that: The kettle body (1) is provided with a corrugated airbag (26); the surface of the corrugated airbag (26) is provided with an air inlet (261) connected to an external delivery pump; the external delivery pump is used to deliver flocculant; one end of the corrugated airbag (26) is fixedly connected to the drainage bucket (13), and the other end is fixedly connected to the inner wall of the kettle body (1); an air passage (17) is provided inside the kettle body (1); one end of the air passage (17) is connected to the corrugated airbag (26), and the other end passes through the upper end surface of the kettle body (1); a circular groove (27) is provided on the lower end surface of the kettle cover (2); the stirring rod (21) is rotatably sealed and connected to the circular groove (2 7); an air hole (216) is provided on the lower end surface of the stirring rod (21); an annular groove (217) is provided on the surface of the stirring rod (21); one end of the stirring rod (21) having the annular groove (217) is located in the circular groove (27); the air hole (216) is communicated with the circular groove (27) through the annular groove (217); an air cavity (271) facing the air passage (17) is provided on the lower end surface of the kettle cover (2); one end of the air cavity (271) away from the air passage (17) is communicated with the circular groove (27); and a one-way valve (28) is fixedly installed in both the air inlet (261) and the air hole (216).

6. A petroleum drilling mud processing system according to claim 5, characterized in that: One end of the air cavity (271) away from the circular groove (27) is threadedly connected to a cannula (29); and one end of the cannula (29) away from the air cavity (271) is slidably and sealingly connected in the airway (17).

7. A petroleum drilling mud processing system according to claim 6, characterized in that: The end of the airway (17) away from the corrugated airbag (26) is slidably sealed with a sealing plug (18); the sealing plug (18) is connected to the inner wall of the airway (17) via a connecting spring (181); and the cross-sectional shape of the cannula (29) is set to be a trapezoid.

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