Environment-friendly oil field sweep plug three-phase separation device

Abstract

The application discloses an environment-friendly oil-field sweep plug three-phase separation device, and belongs to the technical field of oil-field sweep plug. The device comprises a main mechanism for oil three-phase separation and sweep plug, and an opening mechanism and a slag removal mechanism are arranged on the main mechanism. The main mechanism is optimized in design, and a rotatable front hole plate and a rear hole plate are combined to realize effective layering and separation of oil, water and gas. Meanwhile, a high-pressure water jet cleaning system is provided, so that the sweep plug operation can be automatically performed after the oil and water are discharged, the accumulation and blockage of impurities are avoided, the separation efficiency is improved, and the frequency of manual cleaning is reduced. A screw rod transmission mechanism driven by a motor is adopted, and a linkage rack rod, a gear set and a sliding baffle are connected, so that the baffle is automatically opened and the angle of the hole plate is adjusted during the cleaning process, the end of the cleaning process can cover all areas in the main shell, and the problem of cleaning dead angle caused by the fixed structure of the traditional device is avoided.

Description

Technical Field

[0001] This invention relates to the field of oilfield scavenging technology, and in particular to an environmentally friendly three-phase separation device for oilfield scavenging. Background Technology

[0002] During oilfield extraction, crude oil is typically mixed with water, gas, and solid impurities (such as silt, paraffin, etc.), forming a complex multiphase mixture. To meet the requirements of crude oil processing, transportation, and storage, the extracted crude oil must undergo three-phase separation, separating oil, water, and gas, and removing solid impurities. Traditional three-phase separation devices usually employ methods such as gravity settling, centrifugal separation, or filtration. However, in practical applications, these methods have the following technical drawbacks: Traditional separation devices are less effective at handling high-viscosity crude oil or crude oil containing many impurities, resulting in long settling times and incomplete oil-water separation, leaving the separated crude oil still containing a significant amount of water or solid particles; silt, paraffin, and other impurities in the crude oil easily accumulate within the separation device, especially in critical areas such as orifice plates and baffles, leading to reduced flow area or even complete blockage after long-term operation, affecting normal production; the structural design of traditional separation devices is not conducive to internal cleaning, often requiring shutdown and manual disassembly and cleaning, which is not only time-consuming and labor-intensive but may also lead to a decline in equipment performance due to incomplete cleaning; some separation devices are prone to oil spills or substandard exhaust emissions during slag removal, failing to meet the environmental protection requirements of modern oilfield production. Existing technologies still suffer from low automation, limited cleaning coverage, and complex baffle opening and closing mechanisms, making it difficult to achieve efficient and environmentally friendly integrated scavenging and separation operations. Therefore, there is an urgent need for a new type of environmentally friendly oilfield scavenging three-phase separation device that can efficiently separate oil, water, and gas while achieving automated cleaning and slag removal, reducing manual intervention, and improving the stability and environmental friendliness of equipment operation. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention adopts the following technical solution: an environmentally friendly three-phase separation device for oilfield scavenging, comprising a main body for performing three-phase separation and scavenging of petroleum, the main body comprising a main shell, and an opening mechanism and a slag removal mechanism provided on the main body.

[0004] The opening mechanism includes two fixed baffles fixedly installed inside the main body shell, and a sliding baffle is slidably installed on the fixed baffles.

[0005] Furthermore, the main body mechanism includes two upper baffles fixedly installed inside the main body shell, two front hole plates and two rear hole plates rotatably installed inside the main body shell, multiple holes provided on the front hole plates and rear hole plates, a drain outlet fixedly installed inside the main body shell, a slide rail fixedly installed inside the main body shell, an exhaust hole provided on the main body shell, and an exhaust fan connected to the outside of the exhaust hole.

[0006] Furthermore, a motor is fixedly mounted on the main body shell, a motor wheel is fixedly mounted on the motor shaft of the motor, a lead screw is rotatably mounted inside the main body shell, a lead screw wheel is fixedly mounted on the lead screw, a transmission belt is wound around the lead screw wheel and the motor wheel, a slide is slidably mounted on the slide rail, a cleaning end is fixedly mounted on the slide, a water pipe is fixedly mounted on the cleaning end, the water pipe is slidably mounted on the slide rail, the water pipe is connected to an external cleaning machine, and the slide and the lead screw form a threaded transmission.

[0007] Furthermore, a rack rod is slidably mounted on the main body shell, and an internal thread plate is fixedly mounted on the rack rod. The internal thread plate and the lead screw form a threaded transmission. Two upper gears and a front gear are rotatably mounted on the main body shell. A lower gear is fixedly mounted below the upper gears. The lower gear meshes with the front gear. The front gear is fixedly mounted to the front hole plate. An upper transmission belt is wound around the front hole plate and the rear hole plate.

[0008] After impurities such as sand are removed, the oil enters the main shell. The gas is drawn away by the exhaust port and the fan. The liquid enters the space between the front orifice plate and the main shell. Then, the liquid passes through the holes of the front and rear orifice plates and enters the space between the rear orifice plate and the fixed baffle for sedimentation. The water is discharged from the drain after being coalesced and de-oiled by the regenerable packing. The oil, after settling, passes over the fixed baffle and the sliding baffle and enters the space between the fixed baffle and the main shell, and is discharged from the oil outlet.

[0009] When cleaning is required, the water and oil inside the main body shell are first drained. Then, the motor drives the motor wheel to rotate, which in turn drives the lead screw wheel and lead screw to rotate via the transmission belt. This causes the slide to slide along the slide rail. High-pressure water is introduced into the cleaning end through the water pipe. The cleaning end sprays a high-pressure water jet outward, and the slide moves along with the cleaning end, achieving thorough cleaning of the main body shell without any blind spots. At the same time, the rotation of the lead screw causes the internal thread plate and rack to slide along the main body shell. The rack drives the upper and lower gears to rotate, which in turn drives the front gear and front hole plate to rotate. The upper transmission belt drives the rear hole plate to rotate, ensuring that the front and rear hole plates do not obstruct the movement of the cleaning end. The cleaning end cleans the surfaces of the front and rear hole plates. When the internal thread plate moves to the end of the lead screw, it disengages from the lead screw, preventing further movement of the internal thread plate. The front hole plate and rack remain open.

[0010] Furthermore, the opening mechanism includes two wheel frames fixedly installed inside the main body shell. An internal threaded wheel is rotatably installed on one wheel frame, and a driven wheel is rotatably installed on the other wheel frame. An opening belt is wound around the internal threaded wheel and the driven wheel. An upper connecting frame and a lower connecting frame are fixedly installed on the opening belt. The lower connecting frame and the upper connecting frame are respectively fixedly installed with two sliding baffles. A forward lead screw is fixedly installed on the internal threaded plate, and the forward lead screw and the internal threaded wheel form a threaded transmission.

[0011] When the internal thread plate moves, it simultaneously drives the forward lead screw to move. The forward lead screw drives the internal thread wheel to rotate, which in turn drives the opening belt to rotate. This causes the upper and lower connecting frames to move outward simultaneously, which in turn causes the two sliding baffles to move outward simultaneously, so that the sliding baffles open and do not obstruct the movement of the cleaning end.

[0012] Furthermore, the slag removal mechanism includes an oil inlet pipe fixedly installed on the main body shell, an oil inlet hopper fixedly installed on the oil inlet pipe, a separation motor fixedly installed inside the oil inlet hopper, and a separation disc fixedly installed on the motor shaft of the separation motor.

[0013] Furthermore, an output cylinder is fixedly installed on the oil inlet hopper, a slag discharge motor is fixedly installed on the output cylinder, a conveying blade shaft is rotatably installed inside the output cylinder, the conveying blade shaft is provided with multiple holes, the conveying blade shaft is fixedly installed with the motor shaft of the slag discharge motor, and a slag discharge port is provided on the output cylinder.

[0014] Oil enters through the inlet hopper, and the separator motor drives the separator disc to rotate, agitating the oil. Impurities such as sand and gravel in the oil settle at the bottom of the inlet hopper. After removing the mud and sand, the oil enters the main body through the inlet pipe. The slag discharge motor drives the conveyor blade shaft to rotate, and the conveyor blade shaft carries the sand and gravel upwards. The sand and gravel fall out from the slag discharge port. The holes on the conveyor blade shaft prevent the oil from being carried up by the conveyor blade shaft.

[0015] The beneficial effects of this invention compared with the prior art are: (1) This invention optimizes the design of the main structure and combines the rotatable front and rear orifice plates to achieve effective stratification and separation of oil, water and gas. It is also equipped with a high-pressure water jet cleaning system, which can automatically perform clogging operations after draining oil and water, avoid the accumulation of impurities and blockage, improve separation efficiency and reduce the frequency of manual cleaning; (2) This invention adopts a motor-driven screw transmission mechanism, which links the rack, gear set and sliding baffle. During the cleaning process, the baffle is automatically opened and the orifice plate angle is adjusted to ensure that the cleaning end can cover all areas inside the main shell, avoiding the cleaning dead angle problem caused by the fixed structure of traditional devices; (3) The oil inlet hopper of this invention is equipped with a rotating separation disc driven by a separation motor to accelerate the sedimentation of mud and sand, and automatically discharges solid impurities through the spiral conveyor blade shaft. The hole design on the conveyor blade shaft can prevent oil from being carried out, ensure the continuous and stable slag removal process, and reduce the risk of equipment blockage; (4) This invention uses a blower in conjunction with the exhaust port to discharge gas, reducing the emission of harmful gases; the drain outlet is equipped with a regenerable filler coalescing oil removal layer to reduce the oil content in the water, which meets environmental protection requirements. In addition, the overall structure is compact, the transmission mechanism has strong linkage, and the operation is stable and reliable, making it suitable for long-term use under harsh working conditions in oil fields. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention (first perspective).

[0017] Figure 2 This is a schematic diagram of the main structure of the present invention. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the main structure of the present invention. Figure 2 .

[0019] Figure 4 This is a schematic diagram of the main structure of the present invention. Figure 3 .

[0020] Figure 5 This is a schematic diagram of the main structure of the present invention. Figure 4 .

[0021] Figure 6 This is a schematic diagram of the opening mechanism structure of the present invention. Figure 1 .

[0022] Figure 7 This is a schematic diagram of the opening mechanism structure of the present invention. Figure 2 .

[0023] Figure 8 This is a schematic diagram of the slag removal mechanism of the present invention.

[0024] Reference numerals: 101-Main body shell; 102-Motor; 103-Motor wheel; 104-Transmission belt; 105-Lead screw wheel; 106-Lead screw; 107-Drain outlet; 108-Slide carriage; 109-Slide rail; 110-Water pipe; 111-Washing end; 112-Upper baffle; 113-Internal thread plate; 114-Front hole plate; 115-Rear hole plate; 116-Rack and pinion; 117-Upper gear; 118-Lower gear; 119-Front gear; 120-Upper transmission Belt; 121-Exhaust port; 122-Oil outlet; 201-Wheel frame; 202-Forward lead screw; 203-Fixed baffle; 204-Sliding baffle; 205-Upper connecting frame; 206-Lower connecting frame; 207-Internal threaded wheel; 208-Driven wheel; 209-Opening belt; 301-Oil inlet hopper; 302-Oil inlet pipe; 303-Separation motor; 304-Separation disc; 305-Conveying blade shaft; 306-Output cylinder; 307-Slag outlet; 308-Slag outlet motor. Detailed Implementation

[0025] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] Example: Reference Figures 1-8 An environmentally friendly three-phase separation device for oilfield use includes a main body for oil three-phase separation and scavenging. The main body includes a main shell 101 and is equipped with an opening mechanism and a slag removal mechanism.

[0027] The opening mechanism includes two fixed baffles 203 fixedly installed inside the main body shell 101, and a sliding baffle 204 is slidably installed on the fixed baffles 203.

[0028] like Figures 2-5 As shown, the main body includes two upper baffles 112 fixedly installed inside the main body shell 101. Two front perforated plates 114 and two rear perforated plates 115 are rotatably installed inside the main body shell 101. Multiple holes are provided on the front perforated plates 114 and rear perforated plates 115. A drain outlet 107 is fixedly installed inside the main body shell 101. A slide rail 109 is fixedly installed inside the main body shell 101. An exhaust port 121 is provided on the main body shell 101. An exhaust fan is connected to the outside of the exhaust port 121.

[0029] like Figures 2-5 As shown, a motor 102 is fixedly mounted on the main body shell 101, a motor wheel 103 is fixedly mounted on the motor shaft of the motor 102, a lead screw 106 is rotatably mounted inside the main body shell 101, a lead screw wheel 105 is fixedly mounted on the lead screw 106, a transmission belt 104 is wound around the lead screw wheel 105 and the motor wheel 103, a slide frame 108 is slidably mounted on the slide rail 109, a cleaning end 111 is fixedly mounted on the slide frame 108, a water pipe 110 is fixedly mounted on the cleaning end 111, the water pipe 110 is slidably mounted on the slide rail 109, the water pipe 110 is connected to an external cleaning machine, and the slide frame 108 and the lead screw 106 form a threaded transmission.

[0030] like Figures 2-5 As shown, a rack rod 116 is slidably mounted on the main body shell 101, and an internal thread plate 113 is fixedly mounted on the rack rod 116. The internal thread plate 113 and the lead screw 106 form a threaded transmission. Two upper gears 117 and a front gear 119 are rotatably mounted on the main body shell 101. A lower gear 118 is fixedly mounted below the upper gears 117. The lower gear 118 meshes with the front gear 119. The front gear 119 is fixedly mounted to the front hole plate 114. An upper transmission belt 120 is wound around the front hole plate 114 and the rear hole plate 115.

[0031] After impurities such as sand are removed, the oil enters the main body shell 101. The gas is drawn away by the exhaust port 121 and the exhaust fan. The liquid enters the space between the front orifice plate 114 and the main body shell 101. Then, the liquid enters the space between the rear orifice plate 115 and the fixed baffle 203 through the holes of the front orifice plate 114 and the rear orifice plate 115 for sedimentation. After the water is coalesced and de-oiled by the regenerable packing, it is discharged from the drain port 107. After settling, the oil passes over the fixed baffle 203 and the sliding baffle 204 and enters the space between the fixed baffle 203 and the main body shell 101, and is discharged from the oil outlet 122.

[0032] When cleaning is required, the water and oil inside the main housing 101 are first drained. Then, the motor 102 drives the motor wheel 103 to rotate, which in turn drives the lead screw wheel 105 and lead screw 106 to rotate via the transmission belt 104. This causes the slide 108 to slide along the slide rail 109. High-pressure water is introduced into the cleaning end 111 through the water pipe 110. The cleaning end 111 sprays a high-pressure water jet outward. At the same time, the slide 108 moves with the cleaning end 111, achieving thorough cleaning of the main housing 101 without any blind spots. Simultaneously, the lead screw 106 rotates, causing the internal thread plate 113 and rack 116 to slide along the main housing 101. 16 drives the upper gear 117 to rotate, and the upper gear 117 drives the front gear 119 to rotate through the coaxial lower gear 118, which in turn drives the front gear 119 and the front hole plate 114 to rotate. The upper transmission belt 120 drives the rear hole plate 115 to rotate, so that the front hole plate 114 and the rear hole plate 115 will not block the movement of the cleaning end 111. At the same time, the cleaning end 111 cleans the surfaces of the front hole plate 114 and the rear hole plate 115. When the internal thread plate 113 moves to the end of the lead screw 106, the internal thread plate 113 disengages from the lead screw 106, so that the internal thread plate 113 no longer moves, and the front hole plate 114 and the rack 116 remain open.

[0033] like Figure 6 , Figure 7 As shown, the opening mechanism includes two wheel frames 201 fixedly installed inside the main body shell 101. An internal threaded wheel 207 is rotatably installed on one wheel frame 201, and a driven wheel 208 is rotatably installed on the other wheel frame 201. An opening belt 209 is wound around the internal threaded wheel 207 and the driven wheel 208. An upper connecting frame 205 and a lower connecting frame 206 are fixedly installed on the opening belt 209. The lower connecting frame 206 and the upper connecting frame 205 are respectively fixedly installed with two sliding baffles 204. A forward lead screw 202 is fixedly installed on the internal threaded plate 113. The forward lead screw 202 and the internal threaded wheel 207 form a threaded transmission.

[0034] When the internal thread plate 113 moves, it will simultaneously drive the forward lead screw 202 to move. The forward lead screw 202 drives the internal thread wheel 207 to rotate, which in turn drives the opening belt 209 to rotate. This causes the upper connecting frame 205 and the lower connecting frame 206 to move outward simultaneously, thereby causing the two sliding baffles 204 to move outward simultaneously, so that the sliding baffles 204 open and do not obstruct the movement of the cleaning end 111.

[0035] like Figure 8 As shown, the slag removal mechanism includes an oil inlet pipe 302 fixedly installed on the main body shell 101, an oil inlet hopper 301 fixedly installed on the oil inlet pipe 302, a separation motor 303 fixedly installed inside the oil inlet hopper 301, and a separation disc 304 fixedly installed on the motor shaft of the separation motor 303.

[0036] like Figure 8As shown, an output cylinder 306 is fixedly installed on the oil inlet hopper 301, a slag discharge motor 308 is fixedly installed on the output cylinder 306, a conveying blade shaft 305 is rotatably installed inside the output cylinder 306, the conveying blade shaft 305 is provided with multiple holes, the conveying blade shaft 305 is fixedly installed with the motor shaft of the slag discharge motor 308, and a slag discharge port 307 is provided on the output cylinder 306.

[0037] Oil enters from the oil inlet hopper 301. The separation motor 303 drives the separation disc 304 to rotate, thus agitating the oil. Impurities such as sand and gravel in the oil settle at the bottom of the oil inlet hopper 301. After removing the mud and sand, the oil enters the main body shell 101 from the oil inlet pipe 302. The slag discharge motor 308 drives the conveying blade shaft 305 to rotate, and the conveying blade shaft 305 drives the sand and gravel to rise.

[0038] The working principle of the environmentally friendly three-phase separation device for oilfields disclosed in this invention is as follows: oil enters from the oil inlet hopper 301, the separation motor 303 drives the separation disc 304 to rotate to agitate the oil, and impurities such as sand and gravel in the oil settle at the bottom of the oil inlet hopper 301. After removing the mud and sand, the oil enters the main body shell 101 from the oil inlet pipe 302. The slag discharge motor 308 drives the conveying blade shaft 305 to rotate, and the conveying blade shaft 305 drives the sand and gravel to rise. The sand and gravel fall out from the slag discharge port 307. After impurities such as sand are removed, the oil enters the main body shell 101. The gas is drawn away by the exhaust port 121 and the exhaust fan. The liquid enters the space between the front orifice plate 114 and the main body shell 101. Then, the liquid enters the space between the rear orifice plate 115 and the fixed baffle 203 through the holes of the front orifice plate 114 and the rear orifice plate 115 for sedimentation. After the water is coalesced and de-oiled by the regenerable packing, it is discharged from the drain port 107. After settling, the oil passes over the fixed baffle 203 and the sliding baffle 204 and enters the space between the fixed baffle 203 and the main body shell 101, and is discharged from the oil outlet 122. When the internal thread plate 113 moves, it will simultaneously drive the forward lead screw 202 to move. The forward lead screw 202 drives the internal thread wheel 207 to rotate, which in turn drives the opening belt 209 to rotate. This causes the upper connecting frame 205 and the lower connecting frame 206 to move outward simultaneously, thereby causing the two sliding baffles 204 to move outward simultaneously, so that the sliding baffles 204 open and do not obstruct the movement of the cleaning end 111.

[0039] When cleaning is required, the water and oil inside the main body shell 101 are first drained. Then, the motor 102 drives the motor wheel 103 to rotate, which in turn drives the lead screw wheel 105 and the lead screw 106 to rotate via the transmission belt 104. This causes the slide 108 to slide along the slide rail 109. High-pressure water is then introduced into the cleaning end 111 through the water pipe 110. The cleaning end 111 sprays a high-pressure water jet outwards, and at the same time, the slide 108 moves along with the cleaning end 111, achieving thorough cleaning of the main body shell 101 without any blind spots. Simultaneously, the rotation of the lead screw 106 drives the internal thread plate 113 and the rack 116 to move along the main body shell. 101 Slides, rack and pinion 116 drives upper gear 117 and lower gear 118 to rotate, drives front gear 119 and front hole plate 114 to rotate, drives rear hole plate 115 to rotate through upper transmission belt 120, so that front hole plate 114 and rear hole plate 115 will not block the movement of cleaning end 111, and cleaning end 111 cleans the surface of front hole plate 114 and rear hole plate 115. When the internal thread plate 113 moves to the end of lead screw 106, the internal thread plate 113 disengages from lead screw 106, so that the internal thread plate 113 no longer moves, and front hole plate 114 and rack and pinion 116 remain open.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly three-phase separation device for oilfield use, comprising a main body for performing three-phase separation and scavenging of petroleum, characterized in that: The main structure includes a main shell, and the main structure is provided with an opening mechanism and a slag removal mechanism; The opening mechanism includes two fixed baffles fixedly installed inside the main body shell, and a sliding baffle is slidably installed on the fixed baffles; The main body includes two upper baffles fixedly installed inside the main body shell, two front hole plates and two rear hole plates rotatably installed inside the main body shell, multiple holes provided on the front hole plates and rear hole plates, a drain outlet fixedly installed inside the main body shell, a slide rail fixedly installed inside the main body shell, an exhaust hole provided on the main body shell, and an exhaust fan connected to the outside of the exhaust hole. A motor is fixedly mounted on the main body shell, a motor wheel is fixedly mounted on the motor shaft of the motor, a lead screw is rotatably mounted inside the main body shell, a lead screw wheel is fixedly mounted on the lead screw, a transmission belt is wound around the lead screw wheel and the motor wheel, a slide is slidably mounted on the slide rail, a cleaning end is fixedly mounted on the slide, a water pipe is fixedly mounted on the cleaning end, the water pipe is slidably mounted on the slide rail, the water pipe is connected to an external cleaning machine, and the slide and the lead screw form a threaded transmission. A rack rod is slidably mounted on the main body shell, and an internal thread plate is fixedly mounted on the rack rod. The internal thread plate and the lead screw form a threaded transmission. Two upper gears and a front gear are rotatably mounted on the main body shell. A lower gear is fixedly mounted below the upper gear. The lower gear meshes with the front gear. The front gear is fixedly mounted to the front hole plate. An upper transmission belt is wound around the front hole plate and the rear hole plate. The opening mechanism includes two wheel frames fixedly installed inside the main body shell. An internal threaded wheel is rotatably installed on one wheel frame, and a driven wheel is rotatably installed on the other wheel frame. An opening belt is wrapped around the internal threaded wheel and the driven wheel. An upper connecting frame and a lower connecting frame are fixedly installed on the opening belt. The lower connecting frame and the upper connecting frame are respectively fixedly installed with two sliding baffles. A forward lead screw is fixedly installed on the internal threaded plate, and the forward lead screw and the internal threaded wheel form a threaded transmission. The slag removal mechanism includes an oil inlet pipe fixedly installed on the main body shell, an oil inlet hopper fixedly installed on the oil inlet pipe, a separation motor fixedly installed inside the oil inlet hopper, and a separation disc fixedly installed on the motor shaft of the separation motor. An output cylinder is fixedly installed on the oil inlet hopper, a slag discharge motor is fixedly installed on the output cylinder, a conveying blade shaft is rotatably installed inside the output cylinder, the conveying blade shaft is provided with multiple holes, the conveying blade shaft is fixedly installed with the motor shaft of the slag discharge motor, and a slag discharge port is provided on the output cylinder.

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