A device and method for separating sediment in oil extraction

Abstract

This invention relates to the field of oil extraction technology, and more specifically to an oil extraction sediment separation device and method. The oil extraction sediment separation device includes a separation box with two symmetrically arranged chutes inside, and a gantry frame slidably connected at both ends to the two chutes. A V-shaped sediment conveying device is installed on the gantry frame. A return pipe with a pump is connected to the lower end of the separation box, with the upper end of the return pipe facing the opening of the separation box. An electric push rod is fixed between the gantry frame and the separation box, and the electric push rod drives the gantry frame to move up and down, changing the shape of the sediment conveying device. The method includes the following steps: a) Sediment in the oil settles onto four conveyor belts; b) The conveyor belts rotate, continuously transporting the sediment settled on the conveyor belts to the outside of the separation box, thus filtering and separating the sediment in the oil. The beneficial effect is that it can promptly transport the sediment settled in the oil to the outside, avoiding excessive sediment accumulation that affects filtration efficiency.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and more specifically to an oil extraction sediment separation device and method. Background Technology

[0002] Oil extraction typically involves drilling to extract crude oil from underground. The extracted oil is usually a mixture of oil, gas, water, and sediment, necessitating separation to separate the oil from the remaining impurities. One oil drilling fluid separation device (application number 202310228998.X) uses a liquid pump to draw drilling fluid from the top of a settling tank into a filter tank via a connecting pipe. The drilling fluid passes through a filter screen and is discharged through a discharge pipe. When excessive sediment accumulates in the second funnel, the liquid pump is shut off, and a solenoid valve is opened to drain the sediment. To replace the filter screen, a wrench is pulled to detach it from the screen, and the screen is lifted for replacement via a second handle. This convenient filter screen design improves maintenance efficiency. However, this device is not ideal for promptly removing settled sediment during the filtration process, affecting subsequent filtration effectiveness. Summary of the Invention

[0003] To overcome the shortcomings of the existing technology, the present invention provides a mud and sand separation device and method for oil extraction, which has the advantage of being able to transport the mud and sand precipitated in the oil to the outside in a timely manner, avoiding excessive accumulation of mud and sand that affects the filtration efficiency.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] An oil extraction sediment separation device includes a separation box with two symmetrically arranged chutes inside, and a gantry frame with its two ends slidably connected to the two chutes. A sediment conveying device with a V-shape is installed on the gantry frame. A return pipe with a pump is connected to the lower end of the separation box, and the upper end of the return pipe faces the opening of the separation box. Two electric push rods are fixed between the gantry frame and the separation box. The electric push rods drive the gantry frame to move up and down, which can change the shape of the sediment conveying device.

[0006] The sediment conveying device includes two rotating shafts fixed to the lower end of the gantry frame. A main frame is rotatably connected to the middle of each of the two rotating shafts, and four conveying components. The lower ends of the four conveying components are respectively connected to the two ends of the two rotating shafts, and the upper ends of the four conveying components are respectively connected to the two ends of the two main frames.

[0007] The conveying component includes a circular roller rotatably connected to a rotating shaft and a pulley shaft rotatably connected to a main frame. The pulley shaft and the circular roller are connected by a conveyor filter belt, on which multiple filter holes are evenly distributed.

[0008] The conveying component also includes a slide block rotatably connected to the pulley shaft, a reduction motor capable of driving the pulley shaft to rotate is fixedly connected to the slide block, and a slide rail frame is slidably connected to the slide block, which is fixedly connected to the separation box.

[0009] The upper surface of the inner ring of each of the four conveyor filter belts is fitted with a perforated plate, and C-shaped brackets are inserted at both ends of each perforated plate. Each C-shaped bracket is fixed to the corresponding main frame.

[0010] Both main frames have through slots in the middle, and both main frames are rotatably connected to shafts. Both shafts are fixedly connected to gears, which are located in the two through slots respectively. Four racks are fixedly connected to four hole plates, and the four racks are meshed with the two sides of the two gears respectively for transmission. Both shafts are threaded with screws, and both main frames have multiple threaded holes that are adapted to the screws, which are evenly distributed around the axis of the shafts.

[0011] A separation method for oil extraction sediment separation equipment, the method comprising the following steps:

[0012] a: The extracted oil is injected into the separation tank, and the silt in the oil will settle onto the four conveyor belts.

[0013] b: The four geared motors start and drive the conveyor belts on the left and right sides to rotate in opposite directions, thereby continuously transporting the sediment on the conveyor belts to the outside of the separation box, thus achieving the filtration and separation of sediment in the oil.

[0014] c: The sediment transported by the four conveyor belts flows through the guide plate and falls into the collection box for collection;

[0015] d: Two small motors start and drive two brush roller shafts to rotate, cleaning the residual mud and sand on the four conveyor filter belts;

[0016] e: The two electric push rods start and drive the gantry frame to move upward. The gantry frame drives the lower ends of the four conveyor filter belts to move upward, and the upper ends of the four conveyor filter belts unfold to both sides, changing the tilt angle of the four conveyor filter belts to filter and separate the oil at different levels in the separation box. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of a sediment separation device used in oil extraction.

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 3 A schematic diagram of a sediment transport device;

[0021] Figure 4 This is a schematic diagram of the separation box.

[0022] Figure 5 for Figure 4 A schematic diagram of the structure;

[0023] Figure 6 A schematic diagram of the main frame structure;

[0024] Figure 7 This is a schematic diagram of the gear structure;

[0025] Figure 8 This is a schematic diagram of the conveyor belt structure;

[0026] Figure 9 This is a schematic diagram of the orifice plate structure;

[0027] Figure 10 This is a schematic diagram of the brush roller shaft.

[0028] In the diagram: Separation box 101; chute 102; guide plate 103; chute frame 104; return pipe 105; tray 106; collection box 107; shaft frame 108; brush roller shaft 109; gantry frame 201; rotating shaft 202; main frame 203; C-shaped frame 204; through groove 205; shaft 206; gear 207; perforated plate 208; rack 209; round roller 301; pulley shaft 302; conveyor filter belt 303; slide block 304. Detailed Implementation

[0029] like Figures 1 to 5 As shown:

[0030] An oil extraction sediment separation device includes a separation box 101, two symmetrically arranged chutes 102 inside the separation box 101, and a gantry frame 201 with its two ends slidably connected to the two chutes 102 respectively. A sediment conveying device arranged in a V-shape is installed on the gantry frame 201. The lower end of the separation box 101 is connected to a return pipe 105 with a pump, and the upper end of the return pipe 105 faces the opening of the separation box 101. Two electric push rods are fixed between the gantry frame 201 and the separation box 101. The electric push rods drive the gantry frame 201 to move up and down, which can change the shape of the sediment conveying device.

[0031] The extracted oil is injected into the separation tank 101. The sediment in the oil settles onto the V-shaped sediment conveying device. When the sediment conveying device is activated, it can transport the sediment settled in the oil to the outside of the separation tank 101 in a timely manner, thereby continuously filtering and separating the sediment settled in the oil and avoiding the impact of excessive sediment accumulation on filtration efficiency. The filtered oil is located in the separation tank 101 below the sediment conveying device. The separation tank 101 is connected to a drain pipe for discharging the filtered oil. The oil can be discharged after the valve on the drain pipe is opened.

[0032] The electric push rod starts and drives the gantry frame 201 to move upward. The gantry frame 201 drives the lower end of the V-shaped sediment conveying device to move upward, thereby changing the shape of the sediment conveying device so that it can get closer to the upper layer of oil and come into contact with the floating objects in the upper layer of oil. This allows the floating objects mixed in during the oil extraction process to be transported and discharged outward. By controlling the shape of the sediment conveying device, it can come into contact with floating debris at different levels and separate them.

[0033] like Figures 6 to 7 As shown:

[0034] The sediment conveying device includes two rotating shafts 202 fixed to the lower end of the portal frame 201. A main frame 203 is rotatably connected to the middle of each of the two rotating shafts 202, and four conveying components. The lower ends of the four conveying components are respectively connected to the two ends of the two rotating shafts 202, and the upper ends of the four conveying components are respectively connected to the two ends of the two main frames 203.

[0035] The lower ends of the two oppositely arranged conveying components are in contact with each other to prevent mud and sand from falling into the lower end of the separation box 101. When the gantry frame 201 moves upward, it drives the lower ends of the four conveying components to move upward, and the upper ends of the four conveying components spread outward horizontally, thereby changing the angle formed by the two oppositely arranged conveying components, and then contacting floating debris from different layers of oil to transport and separate it outward.

[0036] like Figures 6 to 8 As shown:

[0037] The conveying component includes a circular roller 301 rotatably connected to a rotating shaft 202, and a pulley shaft 302 rotatably connected to a main frame 203. The pulley shaft 302 and the circular roller 301 are connected by a conveyor filter belt 303, on which multiple filter holes are evenly distributed.

[0038] The conveying component also includes a slide block 304 rotatably connected to the pulley shaft 302, a reduction motor that can drive the pulley shaft 302 to rotate is fixedly connected to the slide block 304, and a slide rail frame 104 is slidably connected to the slide block 304, which is fixedly connected to the separation box 101.

[0039] The filter holes will filter out the mud and sand. When the geared motor starts, it drives the pulley shaft 302 to rotate. The pulley shaft 302 and the round roller 301 cooperate to drive the conveyor belt 303 to rotate, thereby transporting the mud and sand or impurities to the outside of the separation box 101.

[0040] When the gantry frame 201 moves upward, it drives the four rollers 301 to move upward, and the four slide blocks 304 slide horizontally outward in the corresponding slide frame 104, thereby changing the tilt angle of the four conveyor filter belts 303, and thus filtering and separating impurities from different layers of oil.

[0041] like Figures 6 to 9 As shown:

[0042] The upper surface of the inner ring of each of the four conveyor filter belts 303 is fitted with a perforated plate 208, and each perforated plate 208 has a C-shaped frame 204 inserted at both ends, and each C-shaped frame 204 is fixed to the corresponding main frame 203.

[0043] When the perforated plate 208 slides within the corresponding two C-shaped frames 204, the filter holes on the conveyor belt 303 and the round holes on the perforated plate 208 will intersect, thereby changing the size of the filter holes and enabling the filtration and separation of mud and sand of different particle sizes.

[0044] After the pump on the return pipe 105 is started, the oil is re-injected above the separator 101. By changing the size of the filter holes on each conveyor filter belt 303, the oil is filtered and separated at different levels. After multiple cycles of filtration and separation, the oil is separated efficiently.

[0045] like Figures 6 to 7 As shown in Figure 9:

[0046] Both main frames 203 have through slots 205 in the middle. Both main frames 203 are rotatably connected to shafts 206. Both shafts 206 are fixedly connected to gears 207. The two gears 207 are located in the two through slots 205 respectively. Four perforated plates 208 are fixedly connected to racks 209. The four racks 209 are respectively meshed with the two sides of the two gears 207 for transmission.

[0047] Rotating shaft 206 drives gear 207 to rotate, and perforated plate 208 drives two racks 209 meshing with it to move closer to each other, thereby driving the two corresponding perforated plates 208 to move closer to each other, thereby changing the size of the filter holes on the conveyor filter belt 303.

[0048] Both shafts 206 are threaded with insert screws, and both main frames 203 have multiple threaded holes that are compatible with insert screws evenly distributed around the axis of the shafts 206.

[0049] The angle through which the shaft 206 rotates can be fixed by screwing the insert screw into the corresponding threaded hole, thereby keeping the position of the hole plate 208 fixed.

[0050] like Figure 10 As shown:

[0051] Both ends of the separation box 101 are fixedly connected to the shaft frame 108, and brush roller shafts 109 are rotatably connected to the shaft frame 108 on both sides. A small motor capable of driving the two brush roller shafts 109 to rotate is fixedly connected to the separation box 101, and the bottom surfaces of the four conveyor filter belts 303 are respectively attached to the two ends of the two brush roller shafts 109.

[0052] The small motor starts and drives the brush roller shaft 109 to rotate, thereby cleaning the mud or impurities remaining on the conveyor filter belt 303, while preventing them from clogging the filter holes and ensuring that the conveyor filter belt 303 can effectively filter.

[0053] like Figures 1 to 2 As shown:

[0054] Both sides of the separation box 101 are fixedly connected to the support plate 106, and a collection box 107 is placed on the support plate 106 on both sides; both ends of the separation box 101 are fixedly connected to the guide plate 103, which is located at the lower end of the brush roller shaft 109; the mud and sand transported by the four conveyor filter belts 303 flow through the guide plate 103 and fall into the collection box 107 for collection.

[0055] A separation method for oil extraction sediment separation equipment, the method comprising the following steps:

[0056] a: The extracted oil is injected into the separation box 101, and the mud and sand in the oil will settle onto the four conveyor belts 303.

[0057] b: The four geared motors start and drive the conveyor belts 303 on the left and right sides to rotate in opposite directions, thereby continuously transporting the mud and sand deposited on the conveyor belts 303 to the outside of the separation box 101, so as to achieve the filtration and separation of mud and sand in the oil.

[0058] c: The mud and sand transported by the four conveyor belts 303 flow through the guide plate 103 and fall into the collection box 107 for collection;

[0059] d: Two small motors start and drive two brush roller shafts 109 to rotate, cleaning the residual mud and sand on the four conveyor filter belts 303;

[0060] e: The two electric push rods start and drive the gantry frame 201 to move upward. The gantry frame 201 drives the lower ends of the four conveyor filter belts 303 to move upward. The upper ends of the four conveyor filter belts 303 unfold to both sides, changing the tilt angle of the four conveyor filter belts 303, and filtering and separating the oil on different layers in the separation box 101.

Claims

1. An oilfield produced sand separation apparatus, characterized by, The system includes a separation box (101), two symmetrically arranged slids (102) inside the separation box (101), and a gantry frame (201) with its two ends slidably connected to the two slids (102). A V-shaped sediment conveying device is installed on the gantry frame (201). The lower end of the separation box (101) is connected to a return pipe (105) with a pump, and the upper end of the return pipe (105) is set towards the opening of the separation box (101). Two electric push rods are fixed between the gantry frame (201) and the separation box (101). The electric push rods drive the gantry frame (201) to move up and down, which can change the shape of the sediment conveying device. The sediment conveying device includes two rotating shafts (202) fixed to the lower end of the portal frame (201), and a main frame (203) is rotatably connected to the middle of each of the two rotating shafts (202). The sediment conveying device also includes four conveying components, the lower ends of which are respectively connected to the two ends of the two rotating shafts (202), and the upper ends of which are respectively connected to the two ends of the two main frames (203). The conveying component includes a circular roller (301) rotatably connected to a rotating shaft (202) and a pulley shaft (302) rotatably connected to a main frame (203). The pulley shaft (302) and the circular roller (301) are connected by a transmission filter belt (303), and multiple filter holes are evenly distributed on the transmission filter belt (303). The conveying component also includes a slide (304) rotatably connected to the pulley shaft (302), a reduction motor that can drive the pulley shaft (302) to rotate is fixedly connected to the slide (304), and a slide frame (104) is slidably connected to the slide (304), and the slide frame (104) is fixedly connected to the separation box (101); When the two electric push rods start and drive the gantry frame (201) to move upward, the gantry frame (201) drives the lower ends of the four conveyor filter belts (303) to move upward, and the upper ends of the four conveyor filter belts (303) unfold to both sides, changing the tilt angle of the four conveyor filter belts (303) to filter and separate the oil on different layers in the separation box (101).

2. The apparatus of claim 1, wherein, The upper surface of the inner ring of each of the four conveyor belts (303) is fitted with a perforated plate (208), and each perforated plate (208) has a C-shaped bracket (204) inserted at both ends, and each C-shaped bracket (204) is fixed to the corresponding main frame (203).

3. The apparatus of claim 2, wherein, Both main frames (203) have through slots (205) in the middle. Both main frames (203) are rotatably connected to shafts (206). Both shafts (206) are fixedly connected to gears (207). The two gears (207) are located in the two through slots (205). Four hole plates (208) are fixedly connected to racks (209). The four racks (209) are respectively meshed with the two sides of the two gears (207) for transmission. Both shafts (206) are threaded with screws. Both main frames (203) have multiple threaded holes that are compatible with the screws evenly distributed around the axis of the shafts (206).

4. The apparatus of claim 3, wherein, Both ends of the separation box (101) are fixedly connected to the shaft frame (108), and brush roller shafts (109) are rotatably connected to the shaft frame (108) on both sides. A small motor capable of driving the two brush roller shafts (109) to rotate is fixedly connected to the separation box (101), and the bottom surfaces of the four conveyor filter belts (303) are respectively attached to the two ends of the two brush roller shafts (109).

5. The apparatus of claim 4, wherein, Both sides of the separation box (101) are fixed with trays (106), and collection boxes (107) are placed on the trays (106) on both sides.

6. The oil extraction sediment separation equipment according to claim 5, characterized in that, Both ends of the separation box (101) are fixed with guide plates (103), and the guide plates (103) are located at the lower end of the brush roller shaft (109).

7. The separation method of the oil extraction sediment separation equipment according to claim 6, characterized in that, The method includes the following steps: a: The extracted oil is injected into the separation tank (101), and the mud and sand in the oil will settle onto the four conveyor belts (303); b: The four geared motors start and drive the conveyor belts (303) on the left and right sides to rotate in opposite directions, thereby continuously transporting the mud and sand deposited on the conveyor belts (303) to the outside of the separation box (101) to achieve the filtration and separation of mud and sand in the oil. c: The sediment transported by the four conveyor belts (303) flows through the guide plate (103) and falls into the collection box (107) for collection; d: Two small motors start and drive two brush roller shafts (109) to rotate, cleaning the residual mud and sand on the four conveyor filter belts (303); e: The two electric push rods start and drive the gantry frame (201) to move upward. The gantry frame (201) drives the lower ends of the four conveyor filter belts (303) to move upward. The upper ends of the four conveyor filter belts (303) unfold to both sides, changing the tilt angle of the four conveyor filter belts (303) to filter and separate the oil on different layers in the separation box (101).

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