Centrifugal supergravity oil well produced liquid reinjection water on-site extraction device and method

Abstract

The invention relates to the technical field of oil-water separation, and provides a centrifugal supergravity oil well produced liquid reinjection water on-site extraction device and method. Comprising a filtering mechanism and an oil-water separation mechanism, the filtering mechanism is provided with a filtering groove, the top of the filtering groove is communicated with a feeding pipe, the bottom of the filtering groove is communicated with a bent pipe, and the bent pipe is communicated with the feeding groove; the oil-water separation mechanism comprises a feeding groove, a rotating conical shaft, a rotating blade, a shaft sleeve, a rectangular opening, a blade, a shell, a conical spacer ring, a conical circular ring, a water outlet ring, an oil outlet ring and a flow control mechanism; the oil well produced liquid can be subjected to slag removal, impurities in the oil well produced liquid are prevented from influencing the separation quality, the conditions of blockage and the like can also be prevented, and the service life of equipment is prolonged; and the large flow hole, the medium flow hole and the small flow hole in the rotating disc are matched with the oil outlet and the water outlet so as to control the oil outlet flow and the water outlet flow, the adjustability is improved, and the condition of cylinder explosion is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-water separation, and provides a centrifugal supergravity device and method for in-situ extraction of produced fluid and reinjection water in oil wells. Background Art

[0002] As oilfield exploitation enters the high water cut period, the water cut of the produced fluid continues to rise, and currently has reached 80%-98%. On the one hand, this has increased the burden on the produced fluid transportation system and downstream treatment equipment. On the other hand, because a large amount of water injection is required for the oil reservoir, the water after centralized treatment in the downstream combined station has to be transported to the injection well through a long-distance pipeline network, which inadvertently forms a long-distance water roaming cycle, not only consuming a large amount of heat energy and electric energy, but also causing problems of poor compatibility between reinjection water and the oil reservoir.

[0003] Obviously, if in-situ treatment and reinjection of the produced fluid can be achieved, not only can the production cost be significantly reduced, but also the water injection effect can be improved.

[0004] The traditional gravity sedimentation method is difficult to achieve this goal due to its large floor area, high investment and low efficiency.

[0005] Currently, the centrifuge has the highest separation ability and efficiency, and its centrifugal acceleration can reach thousands or even tens of thousands of times the gravitational acceleration, and has begun to be applied and developed in the emergency treatment of oil spills on water and sewage treatment.

[0006] Such oil-water centrifugal separation devices and methods are respectively disclosed in Chinese Patent Application No. CN201611000394.6, US Patent US9731223, U,5582724, US5484521, etc.

[0007] The daily treatment capacity of a prototype with a diameter of 380mm has reached 64.8m3 / d, and the oil content in the effluent has approached the environmental protection index of 15ppm. Its ultimate goal is to be able to treat various properties of crude oil, including heavy oil with an oil-water density ratio close to 0.98, with a daily treatment capacity of 172.8m3 / d and the oil content in the drainage meeting the environmental protection standards. Therefore, the centrifuge is very suitable for application at the wellhead and on the produced fluid pipeline.

[0008] However, different from the emergency treatment of crude oil spills on water, during the production process of crude oil liquid production, due to the action of pumping units, valves, elbows and other pipe fittings in the pipeline, as well as various chemical injectants, serious emulsification often occurs. Although it is generally still an oil-water mixture, it contains a large amount of water-in-oil and oil-in-water emulsions, and the oil-in-water emulsion has the greatest impact on the water quality of the effluent from the separator. The so-called oil-in-water emulsion refers to an emulsion formed by very fine oil droplets evenly dispersed in water. Physically, it is equivalent to a homogeneous single-phase fluid, with a density close to that of water and slightly smaller than water. Although existing centrifugal separators have taken many measures to enhance the separation ability of emulsions, in fact, each separator has a limit on the separation ability of fine droplets, called the critical separation diameter. Fine droplets with a diameter lower than this value cannot be well separated. This is because as the diameter of the fine droplets decreases, the volume of the droplets decreases sharply relative to their surface area. Therefore, the volume force here is the centrifugal force, compared with the surface force, the force exerted by the surrounding fluid on the droplets, does not have an advantage. At this time, the fine oil droplets are basically not affected by the centrifugal force in water, but flow with the water or perform Brownian motion in water. Currently, the critical separation diameter of general separators is in the order of 100 microns to dozens of microns. Although the critical separation diameter can be further reduced by increasing the centrifugal force, such as increasing the rotation speed or the diameter of the separation cylinder, it may not be cost-effective economically.

[0009] Therefore, due to the existence of emulsions, it is impossible for existing centrifugal separators to achieve complete separation of oil and water. According to the separation principle of centrifuges, the oil-in-water emulsion is generally always on the water side of the oil-water interface in the separation cylinder, and the closer it is to the oil-water interface, the greater the oil content of the oil-in-water emulsion.

[0010] Since there is no special separation mechanism for the oil-in-water emulsion in the existing separator, this layer of emulsion with a higher oil content cannot cross the oil-water interface and enter the oil diversion channel to be discharged from the separator with the oil. Instead, it can only accumulate in place until it diffuses into the water body, resulting in an increase in the oil content in the effluent and failing to meet the requirements of the oilfield injection water quality; the oil well liquid contains impurities. If the oil well liquid is directly separated, it will reduce the separation quality, increase the blockage situation, and thus reduce the service life of the equipment; workers cannot extract to different degrees according to their own wishes and the status of economic investment, which is likely to cause waste of costs; workers cannot control the flow rates of the oil and water, which is prone to the situation of cylinder explosion, threatening the lives of workers. Summary of the Invention

[0011] The object of the present invention is to provide a centrifugal supergravity oil well liquid reinjection in-situ extraction device and method in view of the deficiencies in the prior art.

[0012] The technical solution is as follows: A centrifugal supergravity in-situ extraction device for produced fluid and reinjected water in oil wells, comprising a filtering mechanism and an oil-water separation mechanism. The filtering mechanism is provided with a filtering tank. The top of the filtering tank is communicated with a feeding pipe, and the bottom of the filtering tank is communicated with a bent pipe, and the bent pipe is communicated with a feeding tank; The oil-water separation mechanism includes a feeding tank, a rotating conical shaft, rotating blades, a shaft sleeve, a rectangular opening, blades, a housing, a conical spacer ring, a conical ring, a water outlet ring, an oil outlet ring and a flow control mechanism. A rotating conical shaft is fixedly connected inside the feeding tank. Rotating blades are fixedly connected to the outer side of the rotating conical shaft. The outer sides of the rotating blades contact the feeding tank. A shaft sleeve is fixedly connected to the outer side of the middle part of the rotating shaft. A plurality of uniformly distributed rectangular openings are fixedly connected to the outer side of the shaft sleeve close to one end of the feeding tank, and a feeding port is arranged in the rectangular opening; A plurality of uniformly distributed blades are fixedly connected to the outer side of the shaft sleeve. The outer sides of the blades contact the housing. A conical spacer ring is inserted between the blades. The outer side of the large ring of the conical spacer ring is fixedly connected to the housing. A circular partition plate is arranged on one side of the small end of the conical ring. The middle part of the circular partition plate is inserted with the shaft sleeve and fixedly connected. A water outlet ring is fixedly connected to one side of the housing close to the feeding tank. A plurality of uniformly distributed water outlet openings are arranged inside the water outlet ring. The water outlet ring is internally inserted with and fixedly connected to the rotating shaft. An oil outlet ring is fixedly connected to one end of the housing far away from the water outlet ring and fixedly connected. The oil outlet ring is internally inserted with and fixedly connected to the rotating shaft. A plurality of uniformly distributed oil outlet openings are arranged inside the oil outlet ring. A flow control mechanism is arranged inside each oil outlet opening and the inner part of one end of the water outlet opening close to the housing.

[0013] Further, one ends of the oil outlet, the water outlet and the feed inlet communicate with the inside of the housing. The other ends of the oil outlet and the water outlet communicate with an oil tank and a water tank respectively. Separation covers are provided on the outer sides of both ends of the rotating shaft and are rotatably connected. The oil tank and the water tank are both arranged inside the separation covers. The separation covers are respectively provided with an oil pipe and a water pipe at the lower ends of the oil tank and the water tank. The oil pipe and the water pipe penetrate through the bottom plate and are fixedly connected. A first valve and a second valve are respectively provided on the outer sides of the oil pipe and the water pipe. A first collection box and a second collection box are provided at the lower ends of the oil pipe and the water pipe. One end of the rotating shaft away from the separation cover is fixedly connected to a connecting shaft. One end of the connecting shaft away from the rotating shaft is fixedly connected to a stepped disc. Retaining frames are provided on the outer sides of both ends of the stepped disc and are rotatably connected. The lower end of the retaining frame is fixedly connected to the bottom plate. A speed change mechanism is arranged inside the stepped disc. A pulley piece is meshed and connected to the outer side of the speed change mechanism. A belt is provided on the outer side of the evenly distributed pulley pieces. One end of the belt away from the stepped disc is meshed and connected to a belt pulley. One end of the belt pulley is fixedly connected to a drive motor shaft. A drive motor is provided at the end of the drive motor shaft away from the belt pulley. The lower end of the drive motor is fixedly connected to a motor base. The lower end of the motor base is fixedly connected to a T-shaped slider. The T-shaped slider slides in a T-shaped chute. The T-shaped chute is arranged inside the bottom plate. A first spring is fixedly connected to one side of the T-shaped slider. The side of the first spring away from the T-shaped slider is fixedly connected to the bottom plate.

[0014] Further, the slag removal mechanism includes a filter outer frame. A hinge pin penetrates through and is rotatably connected to the inside of one end of the filter outer frame. Both ends of the hinge pin are fixedly connected to a filter body. The other end of the filter outer frame rotates in a rotating groove. A filter screen is arranged inside the filter outer frame. Both ends of the filter screen are fixedly connected to symmetrically distributed side plates. The side plates slide in side grooves. The side grooves are symmetrically arranged inside the filter outer frame. A second spring is fixedly connected to the upper end of the side plate. The upper end of the second spring is fixedly connected to the filter screen outer frame. A cam contacts the lower end of the side plate. The middle of the cam penetrates through and is fixedly connected to a vibration motor shaft. A vibration motor is provided at the end of the vibration motor shaft away from the cam. The end of the vibration motor away from the cam is fixedly connected to the filter screen outer frame. A first optical axis is fixedly connected to the lower side groove of the end of the filter screen outer frame away from the hinge pin. A slider slides on the outer side of the first optical axis. The slider slides in a groove. A lifting lug is fixedly connected to the lower end of the slider. The lower end of the lifting lug is hingedly connected to a push rod. A hydraulic cylinder is provided at the lower end of the push rod. The hydraulic cylinder is fixedly connected inside the filter body. A baffle is provided on one side of the filter screen outer frame close to the hinge pin. The baffle penetrates through the filter body. One end of the baffle is meshed and connected to a gear. One side of the gear is fixedly connected to a rotating motor shaft. A rotating motor is provided at the end of the rotating motor shaft away from the gear. The rotating motor is fixed inside the filter body. A slag discharge plate is provided on the side of the baffle away from the filter screen outer frame.

[0015] Further, the speed change mechanism includes a speed change motor fixed inside a stepped disc. On one side of the speed change motor, there is a speed change motor shaft. On the side of the speed change motor shaft away from the speed change motor, a lead screw is fixedly connected. On the side of the lead screw away from the speed change motor shaft, the stepped disc is fixedly connected. A ball screw pair on the outer side of the lead screw is connected to a cone. The cone has symmetrically distributed second optical axes inserted into both ends of the lead screw. Both ends of the second optical axis are fixedly connected to the stepped disc. On the outer side of the cone, there are several uniformly distributed inclined grooves. Inside the inclined grooves, third optical axes are fixedly connected. On the outer side of the second optical axis, a slant block slides. One end of the slant block away from the cone is fixedly connected to a telescopic rod. The telescopic rod slides in the stepped disc. One end of the telescopic rod away from the slant block is fixedly connected to a pulley piece. Further, the flow control mechanism includes a turntable that rotates outside several uniformly distributed water outlets and oil outlets. The turntable is provided with several uniformly distributed large flow holes, medium flow holes, and small flow holes. The large flow holes, medium flow holes, and small flow holes are all connected to the water outlets and oil outlets. On one side of the turntable, an adjusting gear is meshed. On one side of the adjusting gear, an adjusting motor shaft is fixedly connected. On the side of the adjusting motor shaft away from the adjusting gear, there is an adjusting motor. The adjusting motor is fixedly connected to the housing.

[0016] Further, teeth are provided at the meshing positions of the turntable and the baffle with the adjusting gear and the gear respectively.

[0017] Further, the blade is wavy and has several uniformly distributed round holes inside it.

[0018] Further, several uniformly distributed first grooves are provided on the outer side of the large ring of the conical spacer ring.

[0019] Further, several uniformly distributed second grooves are provided on the outer side of the circular partition board; the first groove, the second groove, and the rectangular opening are all provided in the middle between each blade; the opening and closing of the first valve, the second valve, the third valve, the pressure increasing valve, the adjusting motor, the driving motor, the speed change motor, the vibration motor, the hydraulic cylinder, and the rotating motor are all controlled by a remote control.

[0020] Further, the liquid produced by the oil well is introduced into the filtration tank through the feed pipe for filtration. After the liquid produced by the oil well is filtered, the worker can turn on the hydraulic cylinder and the vibration motor through the remote control. The hydraulic cylinder drives the push rod to move upward. The upward movement of the push rod drives the lifting lug to move upward. The upward movement of the lifting lug drives the slider to slide within the first optical axis. The sliding of the slider within the first optical axis drives the outer frame of the filter net to flip. The vibration motor drives the vibration motor shaft to rotate. The rotation of the vibration motor shaft drives the cam to rotate. The rotation of the cam drives the side plate to vibrate up and down. The up and down vibration of the symmetrically distributed side plates drives the filter net to vibrate up and down. Thus, the filtered slag can fall into the third collection box through the slag discharge plate while vibrating, completing the function of the slag removal mechanism. The filtered liquid produced by the oil well can be pumped into the feed tank of the elbow pipe and the rotating shaft through the pressure increasing valve and introduced into the interior of the housing through a number of evenly distributed rectangular openings. At this time, the worker can turn on the drive motor through the remote control to drive the drive motor shaft to rotate. The rotation of the drive motor shaft drives the pulley to rotate. The rotation of the pulley drives the belt to move. The movement of the belt drives a number of evenly distributed pulley pieces to rotate. The rotation of the pulley pieces drives the stepped disc to rotate. The rotation of the stepped disc drives the connecting shaft to rotate. The rotation of the connecting shaft drives the rotating shaft to rotate. The rotation of the rotating shaft drives the shaft sleeve to rotate, thereby driving a number of evenly distributed blades, conical spacers and circular partitions to rotate, and then separating the liquid produced by the oil well under high-speed rotation. Among them, oil and gas will be thrown into the oil outlet groove through the oil outlet of the oil outlet ring and flow into the first collection box through the oil outlet pipe. Water will be thrown into the water outlet groove through the water outlet of the water outlet ring and flow into the second collection box through the water outlet pipe. Thus, the function of extracting reinjected water is realized. If you want to control the flow rate of oil and water output, the worker can turn on the regulating motor through the remote control to drive the regulating motor shaft to rotate. The rotation of the regulating motor shaft drives the regulating gear to rotate. The rotation of the regulating gear drives the turntable to rotate. The rotation of the turntable drives the large flow hole, the medium flow hole and the small flow hole to rotate and cooperate with the oil outlet and the water outlet to control the flow rate of oil and water output, completing the function of the flow control mechanism. If you want to improve the extraction accuracy, the worker can turn on the variable speed motor again through the remote control to drive the variable speed motor shaft to rotate. The rotation of the variable speed motor shaft drives the lead screw to rotate. The rotation of the lead screw drives the cone to move towards one end. The movement of the cone towards one end drives the inclined block to move towards one end. The movement of the inclined block towards one end drives the telescopic rod to move inwards to change the rotation speed of the blade, completing the function of the variable speed mechanism. Thus, the function of a separation device for extracting reinjected water from the liquid produced by a high water cut oil well is completed.

[0021] The beneficial effects of the present invention are as follows: 1. The present invention is provided with a slag removal mechanism, which can remove slag from the liquid produced by the oil well, prevent impurities in the liquid produced by the oil well from affecting the separation quality and can also prevent blockage and other situations, increasing the service life of the equipment.

[0022] 2. The present invention is provided with a flow control mechanism. Workers can use a remote control to start and adjust the motor to drive the rotating disk to rotate, so that the large-flow holes, medium-flow holes and small-flow holes on the rotating disk are matched with the oil outlet and the water outlet, thereby controlling the flow of oil and water output, increasing the adjustability and preventing the occurrence of cylinder explosion.

[0023] 3. The present invention is provided with a speed change mechanism, which can increase the extraction accuracy by increasing the rotation speed of the vane for the liquid produced by the oil well, increasing the practicality. Moreover, workers can also carry out extraction according to their own wishes and the situation of economic investment, which can increase the adjustability.

[0024] 4. The present invention is provided with wavy vanes, round holes and conical spacer rings, which can better separate oil, gas and reinjected water from the liquid produced by the oil well. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a main working sectional view of a separation device for extracting reinjected water from the liquid produced by a high-water-cut oil well according to the present invention; Figure 2 It is Figure 1 the sectional view taken along line A-A of Figure 3 It is Figure 1 the sectional view taken along line B-B of Figure 4 It is Figure 1 the sectional view taken along line C-C of Figure 5 It is Figure 1 the partial enlarged view at D of Figure 6 It is Figure 1 the partial enlarged view at E of Figure 7 It is Figure 1 the partial enlarged view at F of Figure 8 It is Figure 1 the partial enlarged view at G of Figure 9 It is Figure 1 the partial enlarged view at H of Figure 10 It is Figure 1 the partial enlarged view at I of Figure 11 It is Figure 6 the partial enlarged view at J of Figure 12 It is Figure 8 the partial enlarged view at K of Figure 13 It is Figure 8 the partial enlarged view at L of Figure 14 It is Figure 2Partial enlarged view at M; Figure 15 is Figure 3 Partial enlarged view at N; Figure 16 is Figure 1 Partial enlarged view at O; Figure 17 is Figure 11 Cross-sectional view taken along P-P;

[0026] In the figure: 1, bottom plate; 2, first support pillar; 3, first collection box; 4, second collection box; 5, separation cover; 6, motor base; 7, drive motor; 8, stepped disc; 9, drive motor shaft; 10, second support pillar; 11, third support pillar; 12, rectangular plate; 13, third collection box; 14, filter body; 15, feed pipe; 16, outer frame of filter screen; 17, filter screen; 18, slag discharge plate; 19, connecting shaft; 20, rotating shaft; 21, oil outlet groove; 22, water outlet groove; 23, elbow pipe; 24, outer shell; 25, inner groove of separation cover; 26, first valve; 27, second valve; 28, oil outlet; 29, oil outlet ring; 30, T-shaped slider; 31, first spring; 32, T-shaped chute; 33, pulley; 34, belt; 35, pulley piece; 36, telescopic rod; 37, blade; 38, round hole; 39, conical spacer ring; 40, circular partition plate; 41, first groove; 42, second groove; 43, rectangular opening; 44, water outlet ring; 45, rotating conical shaft; 46, feed inlet; 47, shaft sleeve; 48, hydraulic cylinder; 49, push rod; 50, rotating groove; 51, side plate; 52, second spring; 53, side groove; 54, lifting lug; 55, slider; 56, first optical axis; 57, cam; 58, vibration motor shaft; 59, vibration motor; 60, hinge pin; 61, baffle; 62, gear; 63, rotating motor; 64, rotating motor shaft; 65, third valve; 66, pressure increasing valve; 67, variable speed motor; 68, variable speed motor shaft; 69, lead screw; 70, second optical axis; 71, inclined block; 72, third optical axis; 73, inclined groove; 74, filter tank; 75, turntable; 76, adjusting gear; 77, adjusting motor; 78, adjusting motor shaft; 79, rotating blade; 80, oil outlet pipe; 81, water outlet pipe; 82, feed tank; 83, water outlet; 84, fixed block; 85, limit disc; 86, cage; 87, cone body; 88, large flow hole; 89, medium flow hole; 90, small flow hole. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the detailed implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0028] Example 1

[0029] For example Figure 1 , a separation device for extracting reinjected water from the liquid produced by a high water cut oil well, comprising a bottom plate 1. Four sides of the lower end of the bottom plate 1 are fixedly connected with a plurality of uniformly distributed first supports 2. One side of the upper end of the bottom plate 1 is provided with a filter body 14. Four sides of the lower end of the filter body 14 are fixedly connected with second supports 10. The lower ends of the second supports 10 are fixedly connected with the bottom plate 1. The upper end of the filter body 14 is fixedly connected with a feed pipe 15. A third valve 65 is arranged on the outer side of one end of the feed pipe 15 close to the filter body 14. A filter tank 74 is arranged inside the filter body 14. A slag removal mechanism is arranged in the middle of the filter tank 74. A slag discharge plate 18 is arranged and fixedly connected on one side of the filter body 14 close to the slag removal mechanism. A third collection box 13 is arranged at the lower end of the slag discharge plate 18. The lower end of the third collection box 13 is fixedly connected with a rectangular plate 12. Four sides of the lower end of the rectangular plate 12 are fixedly connected with third supports 11. The lower ends of the third supports 11 are fixedly connected with the bottom plate 1. A bent pipe 23 is arranged and fixedly connected at the lower end of the filter tank 74 of the filter body 14.

[0030] For example Figure 10 and 16 , a booster valve 66 is arranged on the outer side of one end of the bent pipe 23 close to the filter body 14. The end of the bent pipe 23 far from the filter body 14 is fixedly connected with a limit disc 85. A fixing block 84 is arranged on the outer side of the limit disc 85 and is rotationally connected. The end of the fixing block 84 far from the bent pipe 23 is fixedly connected with a rotating shaft 20. A feed slot 82 is arranged inside one side of the rotating shaft 20 close to the fixing block 84.

[0031] For example Figure 2 and 14 , a rotating conical shaft 45 is fixedly connected inside the feed slot 82. A rotating blade 79 is fixedly connected to the outer side of the rotating conical shaft 45. The outer side of the rotating blade 79 contacts the feed slot 82. A sleeve 47 is fixedly connected to the outer side of the middle of the rotating shaft 20. A plurality of uniformly distributed rectangular openings 43 are fixedly connected to the outer side of one end of the sleeve 47 close to the feed slot 82. A feed port 46 is arranged inside the rectangular opening 43.

[0032] For example Figure 1 and 6, several evenly distributed blades 37 are fixedly connected to the outer side of the bushing 47. The outer sides of the blades 37 are in contact with the housing 24. A conical spacer ring 39 is inserted between the blades. The outer side of the large ring of the conical spacer ring 39 is fixedly connected to the housing 24. A circular partition 40 is provided on one side of the small end of the conical ring 39. The middle of the circular partition 40 is inserted with the bushing 47 and fixedly connected. One side of the housing 24 close to the feed chute 82 is fixedly connected to a water outlet ring 44. A number of evenly distributed water outlet ports 83 are provided inside the water outlet ring 44. The rotating shaft 20 is inserted into and fixedly connected to the inside of the water outlet ring 44. One end of the housing 24 far from the water outlet ring 44 is fixedly connected to an oil outlet ring 29 and fixedly connected. The rotating shaft 20 is inserted into and fixedly connected to the inside of the oil outlet ring 29. A number of evenly distributed oil outlet ports 28 are provided inside the oil outlet ring 29. A flow control mechanism is provided inside each oil outlet port 28 and at one end of the water outlet port 83 close to the housing 24.

[0033] One end of the oil outlet port 28, the water outlet port 83 and the feed port 46 communicates with the inside of the housing 24. The other ends of the oil outlet port 28 and the water outlet port 83 communicate with the oil outlet groove 21 and the water outlet groove 22 respectively. Separation covers 5 are provided on the outer sides of both ends of the rotating shaft 20 and are rotatably connected. The oil outlet groove 21 and the water outlet groove 22 are both provided inside the separation cover 5. An oil outlet pipe 80 and a water outlet pipe 81 are respectively provided at the lower ends of the separation cover 5 in the oil outlet groove 21 and the water outlet groove 22. The oil outlet pipe 80 and the water outlet pipe 81 are inserted into and fixedly connected to the bottom plate 1. A first valve 26 and a second valve 27 are respectively provided on the outer sides of the oil outlet pipe 80 and the water outlet pipe 81. A first collection box 3 and a second collection box 4 are provided at the lower ends of the oil outlet pipe 80 and the water outlet pipe 81.

[0034] As Figure 1 and 3 , one end of the rotating shaft 20 far from the separation cover 5 is fixedly connected to a connecting shaft 19. One end of the connecting shaft 19 far from the rotating shaft 20 is fixedly connected to a stepped disc 8. Retaining frames 86 are provided on the outer sides of both ends of the stepped disc 8 and are rotatably connected. The lower end of the retaining frame 86 is fixedly connected to the bottom plate 1. A speed change mechanism is provided inside the stepped disc 8. A pulley piece 35 is meshed and connected to the outer side of the speed change mechanism. A belt 34 is provided on the outer sides of the evenly distributed pulley pieces 35. One end of the belt 34 far from the stepped disc 8 is meshed and connected to a pulley 33. One end of the pulley 33 is fixedly connected to a drive motor shaft 9. A drive motor 7 is provided at one end of the drive motor shaft 9 far from the pulley 33. The lower end of the drive motor 7 is fixedly connected to a motor base 6. The lower end of the motor base 6 is fixedly connected to a T-shaped slider 30. The T-shaped slider 30 slides in a T-shaped chute 32. The T-shaped chute 32 is provided in the bottom plate 1. A first spring 31 is fixedly connected to one side of the T-shaped slider 30. One side of the first spring 31 far from the T-shaped slider 30 is fixedly connected to the bottom plate 1.

[0035] As Figure 1 , 8-9 and 12 - 13, the slag removal mechanism includes a filter outer frame 16. One end inside the filter outer frame 16 is inserted with a hinge pin 60 and is rotatably connected. Both ends of the hinge pin 60 are fixedly connected to a filter body 14. The other end of the filter outer frame 16 rotates in a rotation groove 50. A filter screen 17 is provided inside the filter outer frame 16. Both ends of the filter screen 17 are fixedly connected to symmetrically distributed side plates 51. The side plates 51 slide in side grooves 53, and the side grooves 53 are symmetrically arranged inside the filter outer frame 16. The upper end of the side plate 51 is fixedly connected to a second spring 52, and the upper end of the second spring 52 is fixedly connected to the filter outer frame 16. The lower end of the side plate 51 contacts a cam 57. The middle of the cam 57 is inserted with a vibration motor shaft 58 and is fixedly connected. One end of the vibration motor shaft 58 away from the cam 57 is provided with a vibration motor 59, and one end of the vibration motor 59 away from the cam 57 is fixedly connected to the filter outer frame 16. A first optical axis 56 is provided and fixedly connected in the lower side groove at one end of the filter outer frame 16 away from the hinge pin 60. A slider 55 slides on the outside of the first optical axis 56. The slider 55 slides in the groove. The lower end of the slider 55 is fixedly connected to a lifting lug 54. The lower end of the lifting lug 54 is hingedly connected to a push rod 49. The lower end of the push rod 49 is provided with a hydraulic cylinder 48, and the hydraulic cylinder 48 is fixedly connected inside the filter body 14. A baffle 61 is provided on one side of the filter outer frame 16 close to the hinge pin 60. The baffle 61 is inserted into the filter body 14. One end of the baffle 61 is meshed with a gear 62. One side of the gear 62 is fixedly connected to a rotation motor shaft 64. One end of the rotation motor shaft 64 away from the gear 62 is provided with a rotation motor 63, and the rotation motor 63 is fixed inside the filter body 14. A slag discharge plate 18 is provided on the side of the baffle 61 away from the filter outer frame 16. Workers can turn on the hydraulic cylinder 48 and the vibration motor 59 through a remote control. The hydraulic cylinder 48 drives the push rod 49 to move upward. The upward movement of the push rod 49 drives the lifting lug 54 to move upward. The upward movement of the lifting lug 54 drives the slider 55 to slide inside the first optical axis 56. The sliding of the slider 55 inside the first optical axis 56 drives the filter outer frame 16 to flip. The vibration motor 59 drives the vibration motor shaft 58 to rotate. The rotation of the vibration motor shaft 58 drives the cam 57 to rotate. The rotation of the cam 57 drives the side plates 51 to vibrate up and down. The symmetrically distributed side plates 51 vibrating up and down drive the filter screen 17 to vibrate up and down. Thus, the filtered slag can vibrate and fall into the third collection box 13 through the slag discharge plate 18, completing the function of the slag removal mechanism.

[0036] Such as Figure 5, The speed-changing mechanism includes a speed-changing motor 67. The speed-changing motor 67 is fixed inside the stepped disk 8. On one side of the speed-changing motor 67, there is a speed-changing motor shaft 68. On the side of the speed-changing motor shaft 68 far from the speed-changing motor 67, a lead screw 69 is fixedly connected. On the side of the lead screw 69 far from the speed-changing motor shaft 68, it is fixedly connected to the stepped disk 8. A ball screw pair on the outer side of the lead screw 69 is connected to a cone 87. The cone 87 has symmetrically distributed second optical axes 70 inserted into both ends of the lead screw 69. Both ends of the second optical axis 70 are fixedly connected to the stepped disk 8. There are several uniformly distributed inclined grooves 73 on the outer side of the cone 87. Inside the inclined grooves 73, a third optical axis 72 is fixedly connected. An inclined block 71 slides on the outer side of the second optical axis 72. One end of the inclined block 71 far from the cone 87 is fixedly connected to a telescopic rod 36. The telescopic rod 36 slides in the stepped disk 8. One end of the telescopic rod 36 far from the inclined block 71 is fixedly connected to a pulley piece 35. If workers want to improve the extraction accuracy, they can turn on the speed-changing motor 67 again through the remote control to drive the speed-changing motor shaft 68 to rotate. The rotation of the speed-changing motor shaft 68 drives the lead screw 69 to rotate. The rotation of the lead screw 69 drives the cone 87 to move towards one end. The movement of the cone 87 towards one end drives the inclined block 71 to move towards one end. The movement of the inclined block 71 towards one end drives the telescopic rod 36 to move inward to change the rotation speed of the blade 37, thus completing the function of the speed-changing mechanism.

[0037] Such as Figure 6 And 11 , The flow control mechanism includes a turntable 75. The turntable 75 rotates outside several uniformly distributed water outlets 83 and oil outlets 28. The turntable 75 is provided with several uniformly distributed large flow holes 88, medium flow holes 89 and small flow holes 90. The large flow holes 88, medium flow holes 89 and small flow holes 90 are all connected to the water outlets 83 and oil outlets 28. On one side of the turntable 75, an adjusting gear 76 is meshed. On one side of the adjusting gear 76, an adjusting motor shaft 78 is fixedly connected. On the side of the adjusting motor shaft 78 far from the adjusting gear 76, there is an adjusting motor 77. The adjusting motor 77 is fixedly connected to the housing 24. If workers want to control the oil and water flow rates, they can turn on the adjusting motor 77 through the remote control to drive the adjusting motor shaft 78 to rotate. The rotation of the adjusting motor shaft 78 drives the adjusting gear 76 to rotate. The rotation of the adjusting gear 76 drives the turntable 75 to rotate. The rotation of the turntable 75 drives the large flow holes 88, medium flow holes 89 and small flow holes 90 to rotate and cooperate with the oil outlet 28 and water outlet 83 to control the oil and water flow rates, thus completing the function of the flow control mechanism.

[0038] The turntable 75 and the baffle 61 are provided with teeth at the meshing positions with the adjusting gear 76 and the gear 62 respectively, which is beneficial to completing the function of the slag removal mechanism and adjusting the oil output.

[0039] Such as Figure 2 And 6, the blade 37 is wavy and has a number of uniformly distributed circular holes 38 inside it. A number of uniformly distributed first grooves 41 are provided on the outer side of the large ring of the conical spacer ring 39, and a number of uniformly distributed second grooves 42 are provided on the outer side of the circular partition plate 40. The first groove 41, the second groove 42 and the rectangular opening 43 are all provided in the middle between each blade 37, which can better separate the produced liquid of the oil well.

[0040] The opening and closing of the first valve 26, the second valve 27, the third valve 65, the booster valve 66, the adjustment motor 77, the drive motor 7, the speed change motor 67, the vibration motor 59, the hydraulic cylinder 48 and the rotation motor 63 are all controlled by a remote control, which can increase the degree of automation, reduce the labor of workers and increase the work efficiency.

[0041] Embodiment 2

[0042] The working principle of the present invention is: The liquid produced by the oil well is introduced into the filtration tank 74 through the feed pipe 15 for filtration. After the liquid produced by the oil well is filtered, the worker can turn on the hydraulic cylinder 48 and the vibration motor 59 through the remote control. The hydraulic cylinder 48 drives the push rod 49 to move upward. The upward movement of the push rod 49 drives the lifting lug 54 to move upward. The upward movement of the lifting lug 54 drives the slider 55 to slide within the first optical axis 56. The sliding of the slider 55 within the first optical axis 56 drives the outer frame 16 of the filter screen to flip. The vibration motor 59 drives the vibration motor shaft 58 to rotate. The rotation of the vibration motor shaft 58 drives the cam 57 to rotate. The rotation of the cam 57 drives the side plate 51 to vibrate up and down. The up and down vibration of the symmetrically distributed side plates 51 drives the filter screen 17 to vibrate up and down. Thus, the filtered slag can fall into the third collection box 13 through the slag discharge plate 18 while vibrating, completing the function of the slag removal mechanism. The filtered liquid produced by the oil well can be pumped into the feed tank 82 of the elbow pipe 23 and the rotating shaft 20 through the pressure increasing valve 66 and introduced into the interior of the housing 24 through a number of evenly distributed rectangular openings 43. At this time, the worker can turn on the drive motor 7 through the remote control to drive the drive motor shaft 9 to rotate. The rotation of the drive motor shaft 9 drives the pulley 33 to rotate. The rotation of the pulley 33 drives the belt 34 to move. The movement of the belt 34 drives a number of evenly distributed belt pulley pieces 35 to rotate. The rotation of the belt pulley pieces 35 drives the stepped disc 8 to rotate. The rotation of the stepped disc 8 drives the connecting shaft 19 to rotate. The rotation of the connecting shaft 19 drives the rotating shaft 20 to rotate. The rotation of the rotating shaft 20 drives the shaft sleeve 47 to rotate, thereby driving a number of evenly distributed blades 37, conical separating rings 39 and circular separating plates 40 to rotate, and further separating the liquid produced by the oil well under high-speed rotation. Among them, oil and gas will be thrown into the oil outlet groove 21 through the oil outlet 28 of the oil outlet ring 29 and flow into the first collection box 3 through the oil outlet pipe 80. Water will be thrown into the water outlet groove 22 through the water outlet 83 of the water outlet ring 44 and flow into the second collection box 4 through the water outlet pipe 81, thus realizing the function of extracting reinjection water. If you want to control the flow rates of the oil and water outputs, the worker can turn on the regulating motor 77 through the remote control to drive the regulating motor shaft 78 to rotate. The rotation of the regulating motor shaft 78 drives the regulating gear 76 to rotate. The rotation of the regulating gear 76 drives the turntable 75 to rotate. The rotation of the turntable 75 drives the large flow orifice 88, medium flow orifice 89 and small flow orifice 90 to rotate and cooperate with the oil outlet 28 and the water outlet 83 to control the flow rates of the oil and water outputs, completing the function of the flow rate control mechanism. If you want to improve the extraction accuracy, the worker can turn on the variable speed motor 67 again through the remote control to drive the variable speed motor shaft 68 to rotate. The rotation of the variable speed motor shaft 68 drives the lead screw 69 to rotate. The rotation of the lead screw 69 drives the cone 87 to move towards one end. The movement of the cone 87 towards one end drives the inclined block 71 to move towards one end. The movement of the inclined block 71 towards one end drives the telescopic rod 36 to move inward to change the rotation speed of the blade 37, completing the function of the variable speed mechanism. Thus, the function of a separation device for extracting reinjection water from the liquid produced by a high water cut oil well is completed Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. A device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity, comprising a filtering mechanism and an oil-water separation mechanism, characterized in that, the filtering mechanism is provided with a filtering tank, the top of the filtering tank is communicated with a feed pipe, the bottom of the filtering tank is communicated with a bent pipe, and the bent pipe is communicated with a feed tank; the oil-water separation mechanism includes a feed tank, a rotating conical shaft, rotating blades, a shaft sleeve, a rectangular opening, blades, a housing, a conical spacer ring, a conical ring, a water outlet ring, an oil outlet ring and a flow control mechanism. A rotating conical shaft is fixedly connected inside the feed tank, rotating blades are fixedly connected to the outer side of the rotating conical shaft, the outer sides of the rotating blades contact the feed tank, a shaft sleeve is fixedly connected to the outer side of the middle part of the rotating shaft, a plurality of uniformly distributed rectangular openings are fixedly connected to the outer side of one end of the shaft sleeve close to the feed tank, and a feed port is arranged in the rectangular opening; a plurality of uniformly distributed blades are fixedly connected to the outer side of the shaft sleeve, the outer sides of the blades contact the housing, a conical spacer ring is inserted between the blades, the large ring of the conical spacer ring is fixedly connected to the housing, a circular partition plate is arranged on one side of the small end of the conical ring, the shaft sleeve is inserted through the middle of the circular partition plate and fixedly connected, the water outlet ring is fixedly connected to one side of the housing close to the feed tank, a plurality of uniformly distributed water outlet openings are arranged inside the water outlet ring, the rotating shaft is inserted through the inside of the water outlet ring and fixedly connected, the oil outlet ring is fixedly connected to one end of the housing far away from the water outlet ring, the rotating shaft is inserted through the inside of the oil outlet ring and fixedly connected, a plurality of uniformly distributed oil outlet openings are arranged inside the oil outlet ring, and a flow control mechanism is arranged inside each oil outlet opening and the inside of one end of the water outlet opening close to the housing.

2. The device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to claim 1, characterized in that, One end of the oil outlet, the water outlet and the feed inlet communicates with the interior of the housing. The other ends of the oil outlet and the water outlet communicate with an oil tank and a water tank respectively. Separation covers are provided on the outer sides of both ends of the rotating shaft and are rotatably connected. The oil tank and the water tank are both arranged inside the separation covers. The separation covers are respectively provided with an oil pipe and a water pipe at the lower ends of the oil tank and the water tank. The oil pipe and the water pipe penetrate through the bottom plate and are fixedly connected. A first valve and a second valve are respectively arranged on the outer sides of the oil pipe and the water pipe. A first collection box and a second collection box are arranged at the lower ends of the oil pipe and the water pipe. One end of the rotating shaft away from the separation cover is fixedly connected to a connecting shaft. One end of the connecting shaft away from the rotating shaft is fixedly connected to a stepped disc. Retaining frames are provided on the outer sides of both ends of the stepped disc and are rotatably connected. The lower ends of the retaining frames are fixedly connected to the bottom plate. A speed change mechanism is arranged inside the stepped disc. A pulley piece is meshed and connected to the outer side of the speed change mechanism. A belt is arranged on the outer sides of the evenly distributed pulley pieces. One end of the belt away from the stepped disc is meshed and connected to a pulley. One end of the pulley is fixedly connected to a drive motor shaft. A drive motor is arranged at the end of the drive motor shaft away from the pulley. The lower end of the drive motor is fixedly connected to a motor base. The lower end of the motor base is fixedly connected to a T-shaped slider. The T-shaped slider slides in a T-shaped chute. The T-shaped chute is arranged in the bottom plate. A first spring is fixedly connected to one side of the T-shaped slider. The side of the first spring away from the T-shaped slider is fixedly connected to the bottom plate.

3. The in-situ extraction device for centrifugal super-gravity oil well produced fluid reinjection water according to claim 2, characterized in that The slag removal mechanism includes a filter screen outer frame. One end of the filter screen outer frame is internally penetrated by a hinge pin and is rotatably connected. Both ends of the hinge pin are fixedly connected to a filter body. The other end of the filter outer frame rotates in a rotation groove. A filter screen is provided inside the filter outer frame. Both ends of the filter screen are fixedly connected to symmetrically distributed side plates. The side plates slide in side grooves, and the side grooves are symmetrically arranged inside the filter screen outer frame. The upper end of the side plate is fixedly connected to a second spring, and the upper end of the second spring is fixedly connected to the filter screen frame outer frame. The lower end of the side plate contacts a cam. The middle of the cam is penetrated by a vibration motor shaft and is fixedly connected. One end of the vibration motor shaft away from the cam is provided with a vibration motor, and one end of the vibration motor away from the cam is fixedly connected to the filter screen outer frame. A first optical axis is provided and fixedly connected in the lower side groove at one end of the filter screen outer frame away from the hinge pin. A slider slides on the outer side of the first optical axis, and the slider slides in a groove. The lower end of the slider is fixedly connected to a lifting lug, and the lower end of the lifting lug is hingedly connected to a push rod. A hydraulic cylinder is provided at the lower end of the push rod, and the hydraulic cylinder is fixedly connected inside the filter body. A baffle is provided on one side of the filter screen outer frame close to the hinge pin. The baffle penetrates inside the filter body. One end of the baffle is meshed with a gear, and one side of the gear is fixedly connected to a rotating motor shaft. One end of the rotating motor shaft away from the gear is provided with a rotating motor, and the rotating motor is fixed inside the filter body. A slag discharge plate is provided on the side of the baffle away from the filter screen outer frame.

4. The on-site extraction device for centrifugal supergravity oil well produced fluid reinjection water according to claim 3, characterized in that, the speed change mechanism includes a speed change motor fixed inside a stepped disc. A speed change motor shaft is provided on one side of the speed change motor. The side of the speed change motor shaft away from the speed change motor is fixedly connected to a lead screw. The side of the lead screw away from the speed change motor shaft is fixedly connected to the stepped disc. A ball screw pair on the outer side of the lead screw is connected to a cone body. The cone body is internally penetrated by symmetrically distributed second optical axes at both ends of the lead screw, and both ends of the second optical axes are fixedly connected to the stepped disc. A number of uniformly distributed inclined grooves are provided on the outer side of the cone body, and a third optical axis is fixedly connected inside the inclined grooves. An inclined block slides on the outer side of the second optical axis. One end of the inclined block away from the cone body is fixedly connected to a telescopic rod. The telescopic rod slides in the stepped disc, and one end of the telescopic rod away from the inclined block is fixedly connected to a pulley piece.

5. The on-site extraction device for centrifugal supergravity oil well produced fluid reinjection water according to claim 4, characterized in that, the flow control mechanism includes a turntable that rotates on the outer sides of a number of uniformly distributed water outlets and oil outlets. A number of uniformly distributed large flow holes, medium flow holes and small flow holes are provided on the turntable. The large flow holes, medium flow holes and small flow holes communicate with the water outlets and oil outlets. One side of the turntable is meshed with an adjusting gear. One side of the adjusting gear is fixedly connected to an adjusting motor shaft. One end of the adjusting motor shaft away from the adjusting gear is provided with an adjusting motor, and the adjusting motor is fixedly connected to the housing.

6. A device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to claim 5, characterized in that, teeth are provided at the meshing positions of the turntable and the baffle plate with the adjusting gear and the gear respectively.

7. A device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to claim 6, characterized in that, the blades are wavy and are provided with a number of uniformly distributed round holes inside.

8. A device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to claim 7, characterized in that, a number of uniformly distributed first grooves are provided on the outer side of the large ring of the conical spacer ring.

9. A device for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to claim 8, characterized in that, a number of uniformly distributed second grooves are provided on the outer side of the circular partition plate; the first groove, the second groove and the rectangular opening are all provided in the middle between each blade; the opening and closing of the first valve, the second valve, the third valve, the booster valve, the adjusting motor, the driving motor, the variable speed motor, the vibration motor, the hydraulic cylinder and the rotating motor are all controlled by a remote controller.

10. A method for in-situ extraction of produced fluid and reinjected water in an oil well with centrifugal supergravity according to any one of claims 1-9, characterized in that, The produced fluid from the oil well is introduced into the filtration tank 74 through the feed pipe 15 for filtration. After the produced fluid from the oil well is filtered, the worker can turn on the hydraulic cylinder 48 and the vibration motor 59 through the remote control. The hydraulic cylinder 48 drives the push rod 49 to move upward. The upward movement of the push rod 49 drives the lifting lug 54 to move upward. The upward movement of the lifting lug 54 drives the slider 55 to slide within the first optical axis 56. The sliding of the slider 55 within the first optical axis 56 drives the outer frame 16 of the filter screen to flip. The vibration motor 59 drives the vibration motor shaft 58 to rotate. The rotation of the vibration motor shaft 58 drives the cam 57 to rotate. The rotation of the cam 57 drives the side plate 51 to vibrate up and down. The up and down vibration of the symmetrically distributed side plates 51 drives the filter screen 17 to vibrate up and down. Thus, the filtered slag can fall into the third collection box 13 through the slag discharge plate 18 while vibrating, completing the function of the slag removal mechanism. The filtered produced fluid from the oil well can be pumped into the feed tank 82 of the elbow pipe 23 and the rotating shaft 20 through the pressure increasing valve 66 and introduced into the interior of the housing 24 through a number of evenly distributed rectangular openings 43. At this time, the worker can turn on the drive motor 7 through the remote control to drive the drive motor shaft 9 to rotate. The rotation of the drive motor shaft 9 drives the pulley 33 to rotate. The rotation of the pulley 33 drives the belt 34 to move. The movement of the belt 34 drives a number of evenly distributed belt pulley pieces 35 to rotate. The rotation of the belt pulley pieces 35 drives the stepped disc 8 to rotate. The rotation of the stepped disc 8 drives the connecting shaft 19 to rotate. The rotation of the connecting shaft 19 drives the rotating shaft 20 to rotate. The rotation of the rotating shaft 20 drives the shaft sleeve 47 to rotate, thereby driving a number of evenly distributed blades 37, conical spacer rings 39 and circular partitions 40 to rotate, and then separating the produced fluid from the oil well under high-speed rotation. Among them, the oil and gas will be thrown into the oil outlet groove 21 through the oil outlet 28 of the oil outlet ring 29 and flow into the first collection box 3 through the oil outlet pipe 80. The water will be thrown into the water outlet groove 22 through the water outlet 83 of the water outlet ring 44 and flow into the second collection box 4 through the water outlet pipe 81, thus realizing the function of extracting reinjection water. If you want to control the flow rates of the oil and water, the worker can turn on the regulating motor 77 through the remote control to drive the regulating motor shaft 78 to rotate. The rotation of the regulating motor shaft 78 drives the regulating gear 76 to rotate. The rotation of the regulating gear 76 drives the turntable 75 to rotate. The rotation of the turntable 75 drives the large flow orifice 88, medium flow orifice 89 and small flow orifice 90 to rotate and cooperate with the oil outlet 28 and the water outlet 83 to control the flow rates of the oil and water, completing the function of the flow control mechanism. If you want to improve the extraction accuracy, the worker can turn on the variable speed motor 67 through the remote control again to drive the variable speed motor shaft 68 to rotate. The rotation of the variable speed motor shaft 68 drives the lead screw 69 to rotate. The rotation of the lead screw 69 drives the cone 87 to move towards one end. The movement of the cone 87 towards one end drives the inclined block 71 to move towards one end. The movement of the inclined block 71 towards one end drives the telescopic rod 36 to move inward to change the rotation speed of the blade 37, completing the function of the variable speed mechanism. Thus, the function of a separation device for extracting reinjection water from the produced fluid of a high water cut oil well is completed.

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