Oilfield oil-containing mud sand pretreatment device and method

Abstract

The present invention relates to the technical field of oil-containing mud and sand treatment, and specifically to an oilfield oil-containing mud and sand pretreatment device and method, comprising an outer shell arranged on the upper side of a bearing tank shell, and also comprising a bearing plate, an inner baffle is fixedly connected to the edge position of the lower surface of the bearing plate, a first rotating shaft is rotatably provided through the middle position of the bearing plate, and a rotating hole plate is fixedly connected to the upper end of the first rotating shaft. The present invention realizes the automatic classification and separation function of oil-containing mud and sand, so as to recycle oil and mud and sand, significantly improve the work efficiency, and can avoid mud and sand attached to the filter net from hindering the centrifugal separation process, play a good anti-blocking role, shorten the centrifugal separation time, improve the separation and treatment efficiency of oil-containing mud and sand, and realize the pretreatment function of oil-containing mud and sand, speed up the centrifugal separation rate, and further improve the separation and treatment efficiency of oil-containing mud and sand.

Description

Technical Field

[0001] The invention relates to the technical field of oil-containing mud and sand treatment, and in particular to an oilfield oil-containing mud and sand pretreatment device and method. Background Art

[0002] An oil field refers to a geological area with a large amount of recoverable petroleum resources underground, and a large amount of oil-bearing mud and sand can usually be mined in an oil field. The oil field oil-bearing mud and sand resource processing device is a device specially used to process the oil-bearing mud and sand produced during the oil field exploitation process. The device is designed to efficiently separate and reuse the oil and solid particles in the oil-bearing mud and sand, so as to achieve effective resource recovery and environmental protection;

[0003] After searching, the patent number is CN104445848A, which discloses a method and device for treating aged oil and oily mud and sand. The materials are treated by steam spraying, air flotation, ultrasound, etc., without any reagents. The treated materials contain no sulfide components and have no effect on the subsequent electric dehydration equipment. The device used in conjunction with the method can be used for multiple purposes. However, the existing oilfield oily mud and sand pretreatment device still has certain defects when used. It generally uses a single static filter screen to separate the oily mud and sand, and the separation rate is relatively slow, thereby reducing the treatment efficiency of the oily mud and sand. For this reason, a device and method for pretreating oilfield oily mud and sand are proposed. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an oilfield oil-containing mud and sand pretreatment device and method, which solves the technical problem that the existing oilfield oil-containing mud and sand resource treatment device proposed in the above background technology still has certain defects when in use, and generally uses a single static filter screen to separate the oil-containing mud and sand, and the separation rate is relatively slow, thereby reducing the treatment efficiency of the oil-containing mud and sand.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An oilfield oil-containing mud and sand pretreatment device comprises an outer shell arranged on the upper side of a bearing tank shell, and also comprises a bearing plate, an inner baffle is fixedly connected to the edge position of the lower surface of the bearing plate, a first rotating shaft is rotatably penetrated through the middle position of the bearing plate, a rotating hole plate is fixedly connected to the upper end of the first rotating shaft, a first filter screen, a second filter screen and a third filter screen are respectively fixedly connected to the upper surface of the rotating hole plate, a plurality of groups of discharge holes are uniformly opened on the bearing plate at equal intervals, a separating ring plate is fixedly connected to the inner bottom surface of the bearing tank shell, and a first limiting ring and a second limiting ring are respectively fixedly connected to the upper sides of the bearing tank shell and the separating ring plate.

[0007] As a further solution of the present invention, four groups of fixed connecting rods are fixedly connected to the outer side of the carrying plate at equal intervals, and the four groups of fixed connecting rods are all clamped with the inner wall of the outer shell, a first motor is fixedly installed in the middle position of the lower surface of the carrying plate, and the first rotating shaft is fixedly connected to the output end of the first motor, the cross-sectional shapes of the first filter screen, the second filter screen and the third filter screen are all circular, and the first filter screen is located on the inner side of the second filter screen, and the second filter screen is located on the inner side of the third filter screen, and feed pipes are arranged at equal intervals on the outer side of the outer shell near the top.

[0008] As a further solution of the present invention, a second motor is fixedly connected to the lower side of the first motor, a second rotating shaft is fixedly connected to the output end of the second motor, a rotating plate is fixedly connected to the lower end of the second rotating shaft, a plurality of groups of vertical connecting rods are evenly fixedly connected to the upper surface of the rotating plate at equal intervals, the upper ends of the plurality of groups of vertical connecting rods are fixedly connected to blocking disks, and the plurality of groups of blocking disks are respectively matched with the plurality of groups of discharge holes, and the lower ends of the four groups of feed pipes are all located at the inner top of the first filter screen.

[0009] As a further solution of the present invention, the cross-sectional shapes of the first limit ring and the second limit ring are both L-shaped, the lower ends of the outer shell and the inner baffle are respectively matched with the first limit ring and the second limit ring, and four groups of mounting plates are fixedly connected at equal intervals on the outer side of the outer shell near the bottom, and the cross-sectional shapes of the four groups of mounting plates are all L-shaped, and the upper surfaces of the four groups of mounting plates are penetrated by fastening bolts, and the upper surface of the load-bearing slot shell is penetrated by four groups of mounting screw holes at equal intervals.

[0010] As a further solution of the present invention, a top groove cover is provided on the upper side of the outer shell, an externally threaded ring plate is fixedly connected to the edge position of the lower surface of the top groove cover, and the externally threaded ring plate is threadedly connected to the inner wall of the outer shell, a main screw shaft is rotatably provided in the middle position of the upper surface of the top groove cover, and four groups of first slave screw shafts and four groups of second slave screw shafts are rotatably connected to the top groove cover, a first scraper is provided inside the first filter screen, a second scraper is provided between the first filter screen and the second filter screen, and a third scraper is provided between the second filter screen and the third filter screen.

[0011] As a further scheme of the present invention, a dual-axis motor is fixedly installed in the middle position of the upper surface of the top groove cover, and the main screw shaft is fixedly connected to the lower output end of the dual-axis motor, a first threaded hole is penetrated in the middle position of the first scraper, and the first scraper is threadedly connected to the main screw shaft through the first threaded hole, a connecting frame plate is fixedly connected to the lower surface of the top groove cover, four groups of limiting vertical rods are fixedly connected to the lower surface of the connecting frame plate at equal intervals, and the four groups of limiting vertical rods are all slidably connected to the first scraper, four groups of second threaded holes are penetrated at equal intervals on the upper surface of the second scraper, and the second scraper is threadedly connected to the four groups of first slave screw shafts through the four groups of second threaded holes, four groups of third threaded holes are penetrated on the upper surface of the third scraper at equal intervals, and the third scraper is threadedly connected to the four groups of second slave screw shafts through the four groups of third threaded holes.

[0012] As a further scheme of the present invention, the four groups of the first slave screw shafts and the four groups of the second slave screw shafts are symmetrically arranged about the main screw shaft, the outer side of the main screw shaft is clamped and sleeved with a main gear near the top, the outer side of the four groups of the first slave screw shafts are clamped and sleeved with a first slave gear near the top, the outer side of the four groups of the second slave screw shafts are clamped and sleeved with a second slave gear near the top, the four groups of the first slave gears are meshed with the main gear, and the four groups of the second slave gears are respectively meshed with the four groups of the first slave gears, the upper surfaces of the main gear, the four groups of the first slave gears and the four groups of the second slave gears are fixedly connected with movable rings, and several groups of movable rings are rotatably connected to the top groove cover.

[0013] As a further scheme of the present invention, a top trough body is arranged above the top trough cover, a third rotating shaft is arranged through the middle position of the top trough body, and the third rotating shaft is fixedly connected to the upper output end of the dual-axis motor, a rotating table is clamped and sleeved on the outer side of the third rotating shaft, a plurality of groups of stirring blades are fixedly connected at equal intervals on the outer side surface of the rotating table, a plurality of groups of fixed blades are fixedly connected at equal intervals on the inner wall of the top trough body, a plurality of groups of stirring blades and a plurality of groups of fixed blades are staggered, a feed plate is clamped on the inner top of the top trough body, and four groups of material guide pipes are fixedly connected at equal intervals on the lower surface of the top trough body, and the four groups of material guide pipes are respectively located inside the four groups of feed pipes.

[0014] A method for pre-treating oil-containing mud and sand in an oil field, the specific steps of the method are as follows:

[0015] Step 1: The oily mud and sand are introduced into the interior of the top tank body through the cooperation of the feed plate and the rotating table, and then the double-axis motor on the upper surface of the top tank cover is started to drive the third rotating shaft to rotate, thereby driving the rotating table and several groups of stirring blades to rotate together, and then the agglomerated oily mud and sand are dispersed through the cooperation of several groups of stirring blades and several groups of fixed blades, and the dispersed oily mud and sand are introduced into the interior of the first filter screen through four groups of guide pipes and four groups of feed pipes;

[0016] Step 2: When the oil-containing mud and sand are introduced into the interior of the first filter, start the first motor on the lower surface of the carrier plate to drive the first rotating shaft to rotate, thereby driving the rotating hole plate to rotate, and then driving the first filter, the second filter and the third filter to rotate together until the oil and mud and sand are separated, then start the second motor to drive the second rotating shaft to rotate, thereby driving the rotating plate to rotate, and then driving several groups of vertical connecting rods to rotate around the second rotating shaft together, until the blocking disks at the upper ends of several groups of vertical connecting rods are respectively away from the lower sides of several groups of discharge holes. At this time, the mud and sand and oil enter the interior of the bearing tank shell along the inner and outer sides of the inner baffle respectively to complete the recovery operation.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Start the first motor on the lower surface of the carrier plate to drive the first rotating shaft to rotate, thereby driving the rotating hole plate to rotate, and then driving the first filter screen, the second filter screen and the third filter screen to rotate together, and cooperate with the first filter screen, the second filter screen and the third filter screen through centrifugal action to grade and separate the oil-containing mud and sand, and then cooperate with the first filter screen, the second filter screen and the third filter screen through centrifugal action to grade and separate the oil-containing mud and sand, until the oil is introduced between the outer shell and the third filter screen, and then introduced between the inner baffle plate and the outer shell, and then introduced into the interior of the bearing tank shell along the dividing ring plate, thereby realizing the automatic grading and separation function of the oil-containing mud and sand, so as to recycle the oil and mud and sand, and significantly improve the work efficiency.

[0019] 2. By starting the double-axis motor on the upper surface of the top slot cover to drive the main screw shaft and the main gear to rotate together, the first scraper is driven to rise and fall through the first threaded hole in cooperation with the four sets of limit vertical rods, and then the four sets of first slave screw shafts are driven to rotate together through the meshing main gear and the first slave gear, so as to drive the second scraper to rise and fall through the four sets of second threaded holes, and then the four sets of second slave screw shafts are driven to rotate together through the meshing first slave gear and the second slave gear, so as to drive the third scraper to rise and fall through the four sets of third threaded holes, which can avoid the mud and sand attached to the filter screen from hindering the centrifugal separation process, play a good anti-blocking role, shorten the centrifugal separation time, and improve the separation efficiency of oil-containing mud and sand.

[0020] 3. The oily mud and sand are introduced into the interior of the top trough body through the cooperation of the feed plate and the rotating table, and then the third rotating shaft is driven to rotate by the started double-axis motor, thereby driving the rotating table and several groups of stirring blades to rotate together, and then the oily mud and sand in agglomerates are fully dispersed through the staggered cooperation of several groups of stirring blades and several groups of fixed blades, which can avoid the difficulty in separating the oil and mud and sand due to the block shape of the oily mud and sand, realize the pretreatment function of the oily mud and sand, accelerate the centrifugal separation rate, and further improve the separation and treatment efficiency of the oily mud and sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the connection structure of the rotating orifice disk in the present invention.

[0024] Figure 4 It is a schematic diagram of the connection structure of the rotating plate in the present invention.

[0025] Figure 5 It is a schematic diagram of the connection structure between the outer shell and the bearing tank shell in the present invention.

[0026] Figure 6 It is a schematic diagram of the connection structure of the main gear in the present invention.

[0027] Figure 7 It is a schematic diagram of the distribution structure of the stirring blade and the fixed blade in the present invention.

[0028] Figure 8 It is a front view schematic diagram of the present invention.

[0029] In the figure: 1, outer shell; 2, bearing tank shell; 3, inner baffle; 4, bearing plate; 5, fixed connecting rod; 6, first motor; 7, first rotating shaft; 8, rotating hole plate; 9, first filter screen; 10, second filter screen; 11, third filter screen; 12, discharge hole; 13, second motor; 14, second rotating shaft; 15, rotating plate; 16, vertical connecting rod; 17, blocking plate; 18, separating ring plate; 19, first limiting ring; 20, second limiting ring; 21, mounting plate; 22, fastening bolt; 23, mounting screw hole; 24, feeding pipe; 25, top slot cover; 26, outer Threaded ring plate; 27, double-axis motor; 28, main screw shaft; 29, first slave screw shaft; 30, second slave screw shaft; 31, main gear; 32, first slave gear; 33, second slave gear; 34, movable ring; 35, connecting frame plate; 36, limit vertical rod; 37, first scraper; 38, first threaded hole; 39, second scraper; 40, second threaded hole; 41, third scraper; 42, third threaded hole; 43, top trough body; 45, third rotating shaft; 46, rotating table; 47, stirring blade; 48, fixed blade; 49, feed plate; 50, guide pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] See also Figures 1 to 8 The present invention provides an oilfield oil-containing mud sand pretreatment device and method, and the technical scheme is as follows:

[0033] An oilfield oil-containing mud and sand pretreatment device comprises an outer shell body 1 arranged on the upper side of a bearing tank shell 2, and also comprises a bearing plate 4, an inner baffle plate 3 is fixedly connected to the edge position of the lower surface of the bearing plate 4, a first rotating shaft 7 is rotatably penetrated through the middle position of the bearing plate 4, a rotating hole plate 8 is fixedly connected to the upper end of the first rotating shaft 7, a first filter screen 9, a second filter screen 10 and a third filter screen 11 are respectively fixedly connected to the upper surface of the rotating hole plate 8, a plurality of groups of discharge holes 12 are uniformly opened on the bearing plate 4 at equal intervals, a separation ring plate 18 is fixedly connected to the inner bottom surface of the bearing tank shell 2, and a first limiting ring 19 and a second limiting ring 20 are respectively fixedly connected to the upper sides of the bearing tank shell 2 and the separation ring plate 18.

[0034] As an embodiment of the present invention, refer to Figure 2-Figure 5 Four groups of fixed connecting rods 5 are fixedly connected to the outer side of the carrying plate 4 at equal intervals, and the four groups of fixed connecting rods 5 are all clamped with the inner wall of the outer shell 1, a first motor 6 is fixedly installed in the middle position of the lower surface of the carrying plate 4, and the first rotating shaft 7 is fixedly connected to the output end of the first motor 6, the cross-sectional shapes of the first filter screen 9, the second filter screen 10 and the third filter screen 11 are all circular, and the first filter screen 9 is located on the inner side of the second filter screen 10, and the second filter screen 10 is located on the inner side of the third filter screen 11, and the outer side of the outer shell 1 is penetrated by feeding pipes 24 at equal intervals near the top.

[0035] In this embodiment, when mud, sand and oil just enter the inner side of the first filter, small particles of mud, sand and oil are quickly introduced into between the first filter and the second filter through centrifugal action, while larger particles of mud, sand are left on the inner side of the first filter. A large amount of oil and mud, sand does not enter at the same time and accumulate on the inner side of the first filter. The filter is designed to be tubular, so even if the filtered large particles of mud, sand gradually accumulate, it will not affect the subsequent centrifugal operation of the mud, sand.

[0036] The lower side of the first motor 6 is fixedly connected to the second motor 13, the output end of the second motor 13 is fixedly connected to the second rotating shaft 14, the lower end of the second rotating shaft 14 is fixedly connected to the rotating plate 15, and the upper surface of the rotating plate 15 is evenly and evenly fixed with a number of groups of vertical connecting rods 16, the upper ends of the several groups of vertical connecting rods 16 are fixedly connected to the blocking disks 17, and the several groups of blocking disks 17 are respectively matched with the several groups of discharge holes 12, and the lower ends of the four groups of feed pipes 24 are all located at the inner top of the first filter screen 9.

[0037] The cross-sectional shape of the first limiting ring 19 and the second limiting ring 20 are both L-shaped, and the lower ends of the outer shell 1 and the inner baffle 3 are respectively matched with the first limiting ring 19 and the second limiting ring 20, and four groups of mounting plates 21 are fixedly connected at equal intervals on the outer side of the outer shell 1 near the bottom, and the cross-sectional shape of the four groups of mounting plates 21 are all L-shaped, and the upper surfaces of the four groups of mounting plates 21 are penetrated by fastening bolts 22, and the upper surface of the load-bearing groove shell 2 is penetrated by four groups of mounting screw holes 23 at equal intervals.

[0038] Specifically, the first motor 6 on the lower surface of the carrier plate 4 is started to drive the first rotating shaft 7 to rotate, thereby driving the rotating hole plate 8 to rotate, and then driving the first filter screen 9, the second filter screen 10 and the third filter screen 11 to rotate together, and through the centrifugal action, the first filter screen 9, the second filter screen 10 and the third filter screen 11 are coordinated to grade and separate the oil-containing mud and sand, and then through the centrifugal action, the first filter screen 9, the second filter screen 10 and the third filter screen 11 are coordinated to grade and separate the oil-containing mud and sand until the oil is introduced between the outer shell 1 and the third filter screen 11, and then introduced between the inner baffle plate 3 and the outer shell 1, and then introduced into the interior of the bearing tank shell 2 along the dividing ring plate, thereby realizing the automatic grading and separation function of the oil-containing mud and sand, so as to recycle the oil and mud and sand, and significantly improve the work efficiency.

[0039] As an embodiment of the present invention, refer to Figure 3 , Figure 6 A top slot cover 25 is provided on the upper side of the outer shell 1, an external threaded ring plate 26 is fixedly connected to the edge of the lower surface of the top slot cover 25, and the external threaded ring plate 26 is threadedly connected to the inner wall of the outer shell 1, a main screw shaft 28 is rotatably provided in the middle position of the upper surface of the top slot cover 25, and four groups of first slave screw shafts 29 and four groups of second slave screw shafts 30 are rotatably connected to the top slot cover 25, a first scraper 37 is provided inside the first filter screen 9, a second scraper 39 is provided between the first filter screen 9 and the second filter screen 10, and a third scraper 41 is provided between the second filter screen 10 and the third filter screen 11.

[0040] A dual-axis motor 27 is fixedly installed at the middle position of the upper surface of the top slot cover 25, and the main screw shaft 28 is fixedly connected to the lower output end of the dual-axis motor 27. A first threaded hole 38 is penetrated at the middle position of the first scraper 37, and the first scraper 37 is threadedly connected to the main screw shaft 28 through the first threaded hole 38. A connecting frame plate 35 is fixedly connected to the lower surface of the top slot cover 25. Four groups of limiting vertical rods 36 are fixedly connected to the lower surface of the connecting frame plate 35 at equal intervals, and the four groups of limiting vertical rods 36 are all slidably connected to the first scraper 37. Four groups of second threaded holes 40 are penetrated at equal intervals on the upper surface of the second scraper 39, and the second scraper 39 is threadedly connected to the four groups of first slave screw shafts 29 through the four groups of second threaded holes 40. Four groups of third threaded holes 42 are penetrated at equal intervals on the upper surface of the third scraper 41, and the third scraper 41 is threadedly connected to the four groups of second slave screw shafts 30 through the four groups of third threaded holes 42.

[0041] The four groups of first slave screw shafts 29 and the four groups of second slave screw shafts 30 are symmetrically arranged about the main screw shaft 28. The outer side of the main screw shaft 28 is fastened with a main gear 31 near the top, the outer side of the four groups of first slave screw shafts 29 is fastened with a first slave gear 32 near the top, and the outer side of the four groups of second slave screw shafts 30 is fastened with a second slave gear 33 near the top. The four groups of first slave gears 32 are meshed with the main gear 31, and the four groups of second slave gears 33 are respectively meshed with the four groups of first slave gears 32. The upper surfaces of the main gear 31, the four groups of first slave gears 32 and the four groups of second slave gears 33 are fixedly connected with movable rings 34, and several groups of movable rings 34 are rotatably connected to the top slot cover 25.

[0042] Specifically, the dual-axis motor 27 on the upper surface of the top slot cover 25 is started to drive the main screw shaft 28 and the main gear 31 to rotate together, thereby driving the first scraper 37 to rise and fall through the first threaded hole 38 in cooperation with the four groups of limit vertical rods 36, and then the four groups of first slave screw shafts 29 are driven to rotate together through the meshing main gear 31 and the first slave gear 32, thereby driving the second scraper 39 to rise and fall through the four groups of second threaded holes 40, and then the four groups of second slave screw shafts 30 are driven to rotate together through the meshing first slave gear 32 and the second slave gear 33, thereby driving the third scraper 41 to rise and fall through the four groups of third threaded holes 42, which can prevent the mud and sand attached to the filter screen from hindering the centrifugal separation process, play a good anti-blocking role, shorten the centrifugal separation time, and improve the separation and treatment efficiency of oil-containing mud and sand.

[0043] As an embodiment of the present invention, refer to Figure 1 , Figure 7 A top tank body 43 is arranged above the top tank cover 25, a third rotating shaft 45 is arranged through the middle position of the top tank body 43, and the third rotating shaft 45 is fixedly connected to the upper output end of the dual-axis motor 27, a rotating table 46 is fixedly sleeved on the outer side of the third rotating shaft 45, and a plurality of groups of stirring blades 47 are fixedly connected at equal intervals on the outer side surface of the rotating table 46, a plurality of groups of fixed blades 48 are fixedly connected at equal intervals on the inner wall of the top tank body 43, and the plurality of groups of stirring blades 47 and the plurality of groups of fixed blades 48 are staggered, a feed plate 49 is clamped on the inner top of the top tank body 43, and four groups of material guide pipes 50 are fixedly connected at equal intervals on the lower surface of the top tank body 43, and the four groups of material guide pipes 50 are respectively located inside the four groups of feed pipes 24.

[0044] In this embodiment, the height of the bottom surface of the top tank body 43 gradually decreases from the middle to the edge, and the dispersed mud and sand are continuously fed into the four groups of material guide pipes 50 under the stirring of the stirring blade 47 at the lowest position.

[0045] Specifically, the oil-containing mud and sand are introduced into the interior of the top trough body 43 through the cooperation of the feed plate 49 and the rotating table 46, and then the third rotating shaft 45 is driven to rotate by the started dual-axis motor 27, thereby driving the rotating table 46 and several groups of stirring blades 47 to rotate together, and then through the staggered cooperation of several groups of stirring blades 47 and several groups of fixed blades 48, the agglomerated oil-containing mud and sand are fully dispersed, which can avoid the difficulty in separating the oil and mud and sand due to the agglomeration of the oil-containing mud and sand, realize the pretreatment function of the oil-containing mud and sand, accelerate the centrifugal separation rate, and further improve the separation and treatment efficiency of the oil-containing mud and sand.

[0046] Working principle: First, the staff clamps the top tank cover 25 on the upper side of the outer shell 1 through the external threaded ring plate 26, and then installs the outer shell 1 on the upper side of the bearing tank shell 2 through the mounting plate 21, the fastening bolt 22 and the mounting screw hole 23. At this time, the lower ends of the outer shell 1 and the inner baffle 3 are tightly fitted with the first limit ring 19 and the second limit ring 20 respectively. When the device is used, the oil-containing mud and sand are introduced into the interior of the top tank body 43 through the cooperation of the feed plate 49 and the rotating table 46, and then the third rotating shaft 45 is driven to rotate by the started double-axis motor 27, thereby driving the rotating table 46 and several groups of stirring blades 47 to rotate together, and then the several groups of stirring blades 47 and several groups of fixed blades 48 are staggered to form blocks. The oil-containing mud and sand are fully dispersed, which can avoid the difficulty in separating the oil and mud and sand due to the block formation of the oil-containing mud and sand, realize the pretreatment function of the oil-containing mud and sand, speed up the centrifugal separation rate, and improve the separation and treatment efficiency of the oil-containing mud and sand. Secondly, when the oil-containing mud and sand enter the interior of the first filter screen 9 through the cooperation of the four groups of guide pipes 50 and the four groups of feed pipes 24, the first motor 6 on the lower surface of the carrier plate 4 is started to drive the first rotating shaft 7 to rotate, thereby driving the rotating hole plate 8 to rotate, and then driving the first filter screen 9, the second filter screen 10 and the third filter screen 11 to rotate together, and through the centrifugal action, cooperate with the first filter screen 9, the second filter screen 10 and the third filter screen 11 to grade and separate the oil-containing mud and sand, and then Then, the second motor 13 is started to drive the second rotating shaft 14 to rotate, thereby driving the rotating plate 15 to rotate, and then driving the plurality of vertical connecting rods 16 to rotate around the second rotating shaft 14 together, until the blocking disks 17 at the upper ends of the plurality of vertical connecting rods 16 are respectively away from the lower sides of the plurality of discharge holes 12, and then the oil will be introduced between the outer shell 1 and the third filter screen 11, and then introduced between the inner baffle plate 3 and the outer shell 1, and then introduced into the interior of the bearing tank shell 2 along the dividing ring plate, realizing the automatic grading and separation function of the oil-containing mud and sand, so as to recycle the oil and mud and sand, and significantly improve the work efficiency, and finally, by starting the double-axis motor 27 on the upper surface of the top tank cover 25, the main screw shaft 28 and the main gear 31 are driven together Rotate, thereby driving the first scraper 37 to rise and fall through the first threaded hole 38 in cooperation with the four groups of limit vertical rods 36, and then driving the four groups of first slave screw shafts 29 to rotate together through the meshing main gear 31 and the first slave gear 32, thereby driving the second scraper 39 to rise and fall through the four groups of second threaded holes 40, and then driving the four groups of second slave screw shafts 30 to rotate together through the meshing first slave gear 32 and the second slave gear 33, thereby driving the third scraper 41 to rise and fall through the four groups of third threaded holes 42, which can prevent the mud and sand attached to the filter screen from hindering the centrifugal separation process, play a good anti-blocking role, shorten the centrifugal separation time, further improve the separation and treatment efficiency of oil-containing mud and sand, and complete the operation.

[0047] In the description of the present invention, it is necessary to understand that the terms "center", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An oilfield oil-containing mud and sand pretreatment device, comprising an outer shell (1) arranged on the upper side of a bearing tank shell (2), characterized in that: It also comprises a bearing plate (4), the inner baffle plate (3) is fixedly connected to the edge of the lower surface of the bearing plate (4), a first rotating shaft (7) is rotatably provided through the middle position of the bearing plate (4), a rotating hole plate (8) is fixedly connected to the upper end of the first rotating shaft (7), a first filter screen (9), a second filter screen (10) and a third filter screen (11) are respectively fixedly connected to the upper surface of the rotating hole plate (8), a plurality of groups of discharge holes (12) are evenly opened on the bearing plate (4) at equal intervals, a separation ring plate (18) is fixedly connected to the inner bottom surface of the bearing tank shell (2), a first limiting ring (19) and a second limiting ring (20) are respectively fixedly connected to the upper sides of the bearing tank shell (2) and the separation ring plate (18), and the lower ends of the outer shell (1) and the inner baffle plate (3) are respectively matched with the first limiting ring (19) and the second limiting ring (20); Four groups of fixed connecting rods (5) are fixedly connected at equal intervals on the outer side of the carrier plate (4), and the four groups of fixed connecting rods (5) are all snap-fitted to the inner wall of the outer shell (1); a first motor (6) is fixedly installed at the middle position of the lower surface of the carrier plate (4), and the first rotating shaft (7) is fixedly connected to the output end of the first motor (6); the cross-sectional shapes of the first filter screen (9), the second filter screen (10) and the third filter screen (11) are all circular, and the first filter screen (9) is located on the inner side of the second filter screen (10), and the second filter screen (10) is located on the inner side of the third filter screen (11); and feed pipes (24) are penetrated at equal intervals on the outer side of the outer shell (1) near the top; A top slot cover (25) is provided on the upper side of the outer shell (1), an outer threaded ring plate (26) is fixedly connected to the edge of the lower surface of the top slot cover (25), and the outer threaded ring plate (26) is threadedly connected to the inner wall of the outer shell (1), a main screw shaft (28) is rotatably provided at the middle position of the upper surface of the top slot cover (25), and four groups of first slave screw shafts (29) and four groups of second slave screw shafts (30) are rotatably connected to the top slot cover (25), a first scraper (37) is provided inside the first filter screen (9), a second scraper (39) is provided between the first filter screen (9) and the second filter screen (10), and a third scraper (41) is provided between the second filter screen (10) and the third filter screen (11); A double-shaft motor (27) is fixedly mounted at a middle position on the upper surface of the top slot cover (25), and a main screw shaft (28) is fixedly connected to a lower output end of the double-shaft motor (27). A first threaded hole (38) is provided through a middle position of the first scraper (37), and the first scraper (37) is threadedly connected to the main screw shaft (28) through the first threaded hole (38). A connecting frame plate (35) is fixedly connected to the lower surface of the top slot cover (25), and four groups of limit vertical rods ( 36), and the four groups of limit vertical rods (36) are all slidably connected to the first scraper (37), the upper surface of the second scraper (39) is provided with four groups of second threaded holes (40) at equal intervals, and the second scraper (39) is threadedly connected to the four groups of first slave screw shafts (29) through the four groups of second threaded holes (40), and the upper surface of the third scraper (41) is provided with four groups of third threaded holes (42) at equal intervals, and the third scraper (41) is threadedly connected to the four groups of second slave screw shafts (30) through the four groups of third threaded holes (42); The four groups of the first slave screw shafts (29) and the four groups of the second slave screw shafts (30) are all symmetrically arranged about the main screw shaft (28); the outer side of the main screw shaft (28) is fixedly sleeved with a main gear (31) near the top; the outer side of the four groups of the first slave screw shafts (29) is fixedly sleeved with a first slave gear (32) near the top; the outer side of the four groups of the second slave screw shafts (30) is fixedly sleeved with a second slave gear (33) near the top; the four groups of the first slave gears (32) are meshed with the main gear (31); the four groups of the second slave gears (33) are respectively meshed with the four groups of the first slave gears (32); the upper surfaces of the main gear (31), the four groups of the first slave gears (32) and the four groups of the second slave gears (33) are fixedly connected with movable rings (34); and a plurality of groups of movable rings (34) are rotatably connected to the top slot cover (25); A top tank body (43) is arranged above the top tank cover (25); a third rotating shaft (45) is arranged through the middle position of the top tank body (43), and the third rotating shaft (45) is fixedly connected to the upper output end of the double-shaft motor (27); a rotating platform (46) is fixedly sleeved on the outer side of the third rotating shaft (45); a plurality of groups of stirring blades (47) are fixedly connected to the outer side surface of the rotating platform (46) at equal intervals; a plurality of groups of fixed blades (48) are fixedly connected to the inner wall of the top tank body (43) at equal intervals; the plurality of groups of stirring blades (47) and the plurality of groups of fixed blades (48) are arranged alternately; a feed plate (49) is fixedly mounted on the inner top of the top tank body (43); and four groups of material guide pipes (50) are fixedly connected to the lower surface of the top tank body (43) at equal intervals; the four groups of material guide pipes (50) are respectively located inside the four groups of feed pipes (24).

2. The oilfield oil-containing mud and sand pretreatment device according to claim 1 is characterized in that: A second motor (13) is fixedly connected to the lower side of the first motor (6); a second rotating shaft (14) is fixedly connected to the output end of the second motor (13); a rotating plate (15) is fixedly connected to the lower end of the second rotating shaft (14); a plurality of groups of vertical connecting rods (16) are fixedly connected to the upper surface of the rotating plate (15) at equal intervals; a blocking disk (17) is fixedly connected to the upper ends of the plurality of groups of vertical connecting rods (16); and the plurality of groups of blocking disks (17) are respectively matched with the plurality of groups of discharge holes (12); and the lower ends of the four groups of feed pipes (24) are all located at the inner top of the first filter screen (9).

3. The oilfield oil-containing mud and sand pretreatment device according to claim 1 is characterized in that: The cross-sectional shapes of the first limiting ring (19) and the second limiting ring (20) are both L-shaped, and four groups of mounting plates (21) are fixedly connected to the outer side of the outer shell (1) near the bottom at equal intervals, and the cross-sectional shapes of the four groups of mounting plates (21) are all L-shaped, and the upper surfaces of the four groups of mounting plates (21) are penetrated by fastening bolts (22), and the upper surface of the bearing slot shell (2) is penetrated by four groups of mounting screw holes (23) at equal intervals.

4. A method for pre-treating oil-containing mud and sand in an oil field, using an oil-containing mud and sand pre-treating device as claimed in any one of claims 1 to 3, characterized in that: The specific steps of this processing method are as follows: Step 1: The oily mud and sand are introduced into the interior of the top tank body (43) by means of the cooperation of the feed plate (49) and the rotating table (46), and then the double-shaft motor (27) on the upper surface of the top tank cover (25) is started to drive the third rotating shaft (45) to rotate, thereby driving the rotating table (46) and the plurality of groups of stirring blades (47) to rotate together, and then the agglomerated oily mud and sand are dispersed by means of the cooperation of the plurality of groups of stirring blades (47) and the plurality of groups of fixed blades (48), and the dispersed oily mud and sand are introduced into the interior of the first filter screen (9) through the four groups of guide pipes (50) and the four groups of feed pipes (24); Step 2: When the oil-containing mud and sand are introduced into the interior of the first filter screen (9), the first motor (6) on the lower surface of the carrier plate (4) is started to drive the first rotating shaft (7) to rotate, thereby driving the rotating hole plate (8) to rotate, and then driving the first filter screen (9), the second filter screen (10) and the third filter screen (11) to rotate together until the oil and mud and sand are separated. Then, the second motor (13) is started to drive the second rotating shaft (14) to rotate, thereby driving the rotating plate (15) to rotate, and then driving the plurality of groups of vertical connecting rods (16) to rotate around the second rotating shaft (14) together, until the blocking plates (17) at the upper ends of the plurality of groups of vertical connecting rods (16) are respectively away from the lower sides of the plurality of groups of discharge holes (12). At this time, the mud and sand and the oil respectively enter the interior of the carrier tank shell (2) along the inner side and the outer side of the inner baffle plate (3) to complete the recovery operation.

Images