CN112870832A

CN112870832A - Petroleum exploitation sand filtering equipment and filtering method thereof

Info

Publication number: CN112870832A
Application number: CN202110045079.XA
Authority: CN
Inventors: 钱庞莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-06-01

Abstract

The invention relates to the technical field of oil exploitation, in particular to an oil exploitation gravel and sand filtering device and a filtering method thereof, wherein the oil exploitation gravel and sand filtering device comprises a box body, a fixing ring is fixedly connected to the upper side in the box body, a rotating groove is formed in the fixing ring, a rotating ring is rotatably connected to the inside of the rotating groove, a rotating barrel is fixedly connected to the inside of the rotating ring, and cleaning mechanisms are fixedly connected to the left side and the right side of the bottom end of the rotating barrel; it can avoid the oil absorption on the stone sand, reduce the waste of oil, carry out the secondary filter through the second filter hopper, improve filterable effect, the quality of oil has been improved, first filter hopper and second filter hopper clean, can avoid stone sand to block up first filter hopper and second filter hopper, prolong the life of first filter hopper and second filter hopper, filterable efficiency has been improved, avoided the manual work to clear up it, workman's work load has been reduced, the practicality of its use has been improved.

Description

Petroleum exploitation sand filtering equipment and filtering method thereof

Technical Field

The invention relates to the technical field of oil exploitation, in particular to an oil exploitation gravel and sand filtering device and a filtering method thereof.

Background

As is well known, oil extraction refers to the act of excavating and extracting oil in places where oil is stored. In the process of oil exploitation, a driving mode that oil gas flows into the bottom of a well from a reservoir and rises to the wellhead from the bottom of the well is adopted.

The invention patent with Chinese patent number CN202010416419.0 discloses a sand and stone filtering device for oil exploitation, however, the following defects still exist in the prior art scheme: 1) the mechanism that removes sand inhales partial petroleum to the collecting box easily in, a large amount of stones sand leads to the jam of oil cleaner screen easily, 2) can not filter the whole bottoms to the collecting box of oil in the stones sand, cause the waste of oil resource, 3) do not have clear device on the circular filter screen in addition, stones sand in the oil causes the jam of circular filter screen easily, often need the manual work to clear up it, increase workman's work load, its filterable efficiency has been reduced, 4) current device is unfavorable for separating the petroleum of different quality grades, the practicality of its use has been reduced. Therefore, the invention provides a sand and stone filtering device for oil exploitation and a filtering method thereof.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an oil exploitation gravel and sand filtering device and a filtering method thereof so as to solve the problems in the technical background.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an oil exploitation gravel and sand filtering device comprises a box body, wherein a fixing ring is fixedly connected to the upper side inside the box body, a rotary groove is arranged inside the fixing ring, a rotary ring is rotatably connected inside the rotary groove, a rotary barrel is fixedly connected inside the rotary ring, a cleaning mechanism is fixedly connected to the left side and the right side of the bottom end of the rotary barrel, a first filter hopper is fixedly connected to the bottom side of the inner side wall of the rotary barrel, the bottom end of the first filter hopper is communicated with a first discharging pipe, a baffle is arranged inside the first discharging pipe in a sliding mode, supporting rods are fixedly connected to the left side and the right side of the bottom end of the baffle, a first connecting plate is fixedly connected to the bottom ends of the two supporting rods and is in sliding fit with the inner side wall of the first discharging pipe, a first connecting rod is fixedly connected to the bottom end of the first connecting plate, a second discharging pipe is arranged outside the bottom end of the first discharging pipe in a, the bottom end of the first connecting plate is fixedly connected with the top end of the first connecting rod, the bottom end of the first connecting rod is fixedly connected with a second connecting rod, the interior of the box body is fixedly connected with a second filter hopper, the bottom end of the second filter hopper is communicated with a third discharging pipe, the inner side wall of the third discharging pipe is in sliding fit with the outer side wall of the second discharging pipe, the bottom end of the third discharging pipe extends to the lower part of the box body, the bottom side of the interior of the third discharging pipe is fixedly connected with a sealing plate, the bottom end of the sealing plate is fixedly connected with an electric cylinder, a telescopic rod of the electric cylinder extends to the upper part of the sealing plate and is fixedly connected with the bottom end of the second connecting rod, the bottom side of the right end of the third discharging pipe is communicated with a fourth discharging pipe, a first valve is installed on the fourth discharging pipe, the upper side of the outer side wall of the rotary barrel is fixedly connected with a conical gear ring, the upper side, the conical gear is meshed with the conical gear ring, the top end of the box body is provided with a top plate, the bottom end of the top plate is fixedly connected with a fixed column, the bottom sides of the left end and the right end of the fixed column are fixedly connected with a first connecting column, one end of the first connecting column, far away from the fixed column, is fixedly connected with a first scraper blade, the bottom end of the first scraper blade is fixedly connected with a first brush, the bottom end of the brush is contacted with the inner side wall of the first filter hopper, the bottom side of the right end of the box body is fixedly connected with an oil discharge pipe communicated with the interior of the second box body, a second valve is arranged on the oil discharge pipe, the first filter hopper and the second filter hopper are both funnel-shaped with a lower middle part and a higher periphery, the diameter of the sieve pore of the second filter hopper is smaller than that of the sieve pore of the first filter hopper, the rear side of box is provided with elementary oil extraction pipe, the high position of elementary oil extraction pipe is located between first filter hopper and the second filter hopper.

Preferably, clean the mechanism and include the second spliced pole, the bottom fixedly connected with second scraper blade of second spliced pole, the bottom fixedly connected with second brush of second scraper blade, the bottom of second brush and the inside wall contact of second filter hopper, one side fixedly connected with support column, the bottom of support column and the top fixed connection of second scraper blade of row of being close to the second of second spliced pole.

Preferably, the left side of the top end of the top plate is connected with an oil inlet pipe, one end of the oil inlet pipe, which is far away from the top plate, is fixedly connected with a flange, and the bottom end of the oil inlet pipe penetrates through the top plate and extends to the inside of the rotary barrel.

Preferably, a material guide plate inclined towards the lower right is fixedly connected to the bottom side inside the third discharging pipe, and the material guide plate is in sliding fit with a telescopic rod of the electric cylinder.

Preferably, the four supporting legs are fixedly connected to the bottom end of the box body, and the supporting seats are fixedly connected to the bottom ends of the four supporting legs.

Preferably, the left end of the box body is fixedly connected with a second supporting plate, and the top end of the second supporting plate is fixedly connected with the bottom end of the motor.

Preferably, the outer side wall of the first discharging pipe is in sliding fit with a sealing sleeve, and the bottom end of the sealing sleeve is fixedly connected with the top end of the second discharging pipe.

A sand and stone filtering method for petroleum exploitation comprises the following steps:

the method comprises the following steps that firstly, a motor drives a conical gear to rotate, a first gear drives a conical gear ring to rotate, the conical gear ring drives a rotary barrel to rotate, the rotary barrel drives a first filtering hopper to rotate, and petroleum is filtered for the first time through the rotation of the first filtering hopper;

cleaning the surface of the first filter hopper through a first brush, and obtaining petroleum of a first quality grade from a primary oil discharge pipe;

step three, performing secondary filtration on the petroleum through a second filter hopper;

driving a second connecting column to rotate through a rotary barrel, driving a second scraper and a second brush to rotate through the second connecting column, and enabling the brush to clean the stone sand on the second filter hopper;

opening a second valve, and obtaining petroleum of a second quality grade through an oil discharge pipe;

step six, the second connecting rod is pushed to move upwards through the electric cylinder, the second connecting rod pushes the second discharging pipe and the first connecting rod to move upwards, the bottom end of the second discharging pipe is made to move to the position above the third discharging pipe, the first connecting rod pushes the first connecting plate and the baffle to move upwards, the baffle is made to move to the position above the first discharging pipe, the first valve is opened, and the stone sand on the first filtering hopper and the second filtering hopper is discharged through the fourth discharging pipe.

(III) advantageous effects

Compared with the prior art, the invention provides the sand and stone filtering equipment for oil exploitation and the filtering method thereof, and the sand and stone filtering equipment has the following beneficial effects:

1. according to the oil exploitation gravel and sand filtering device and the filtering method thereof, the motor drives the conical gear to rotate, the first gear drives the conical gear ring to rotate, the conical gear ring drives the rotary barrel to rotate, the rotary barrel drives the first filtering hopper to rotate, the first filtering hopper rotates and filters oil for the first time, the oil filtering speed is increased, the oil can be prevented from being adsorbed on gravel and sand, the waste of the oil is reduced, the second filtering hopper filters the oil for the second time, the filtering effect is improved, and the quality of the oil is improved.

2. According to the oil exploitation gravel and sand filtering device and the filtering method thereof, the first filtering hopper and the second filtering hopper are respectively cleaned through the first brush and the second brush, so that the first filtering hopper and the second filtering hopper can be prevented from being blocked by gravel sand, the permeability of the first filtering hopper and the permeability of the second filtering hopper are ensured, the service lives of the first filtering hopper and the second filtering hopper are prolonged, and the filtering efficiency is improved.

3. According to the oil exploitation gravel and sand filtering device and the filtering method thereof, the second connecting rod is pushed to move upwards through the electric cylinder, the second connecting rod pushes the second discharging pipe and the first connecting rod to move upwards, the bottom end of the second discharging pipe is moved above the third discharging pipe, the first connecting rod pushes the first connecting plate and the baffle plate to move upwards, the baffle plate is moved above the first discharging pipe, the first valve is opened, gravel and sand on the first filtering hopper and the second filtering hopper are discharged through the fourth discharging pipe, manual cleaning of the gravel and sand is avoided, the workload of workers is reduced, and the practicability of the use of the gravel and sand is improved.

4. The oil is separated according to the quality grade of the oil through the primary oil discharge pipe and the oil discharge pipe, and different application scenes are facilitated. For example, for an industrial occasion with low requirements on the content of petroleum impurities, the oil can be obtained from a primary oil discharge pipe after primary filtration; for industrial occasions with high requirements on the impurity content of petroleum, the petroleum is filtered twice, and the oil is taken from an oil discharge pipe. In addition, the control valves of the primary oil discharge pipe and the oil discharge pipe can be respectively controlled according to the requirements for the oil with different quality grades, so that the yield of the oil with different quality grades can be respectively controlled

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged partial view of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic view of the present invention at a portion B in FIG. 1;

fig. 4 is a partial enlarged structural view at C in fig. 1 according to the present invention.

In the figure: 1. a box body; 2. a fixing ring; 3. rotating the ring; 4. rotating the barrel; 5. a first filter hopper; 6. a first discharging pipe; 7. a baffle plate; 8. a strut; 9. a first connecting plate; 10. a first connecting rod; 11. a second discharge pipe; 12. a second connecting plate; 13. a second connecting rod; 14. a second filter hopper; 15. a third discharge pipe; 16. closing the plate; 17. an electric cylinder; 18. a fourth discharge pipe; 19. a first valve; 20. a conical toothed ring; 21. a motor; 22. a bevel gear; 23. a top plate; 24. fixing a column; 25. a first connecting column; 26. a first squeegee; 27. a first brush; 28. an oil discharge pipe; 29. a second valve; 30. a second connecting column; 31. a second squeegee; 32. a second brush; 33. a support pillar; 34. an oil inlet pipe; 35. a flange; 36. a material guide plate; 37. a support leg; 38. a support; 39. a second support plate; 40. and (5) sealing the sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-4, an oil extraction gravel and sand filtering apparatus and a filtering method thereof comprise a box body 1, wherein a fixed ring 2 is fixedly connected to the upper side of the interior of the box body 1, a rotating groove is formed in the interior of the fixed ring 2, a rotating ring 3 is rotatably connected to the interior of the rotating groove, a rotating barrel 4 is fixedly connected to the interior of the rotating ring 3, cleaning mechanisms are fixedly connected to the left side and the right side of the bottom end of the rotating barrel 4, a first filtering hopper 5 is fixedly connected to the bottom side of the inner side wall of the rotating barrel 4, the first filtering hopper 5 is a funnel shape with a lower middle part and a higher periphery, a first discharging pipe 6 is communicated with the bottom end of the first filtering hopper 5, a baffle 7 is slidably arranged in the first discharging pipe 6, supporting rods 8 are fixedly connected to the left side and the right side of the bottom end of the baffle 7, a first connecting plate 9 is fixedly connected to the bottom ends of the, a first connecting rod 10 is fixedly connected to the bottom end of the first connecting plate 9, a second discharging pipe 11 is arranged on the outer side of the bottom end of the first discharging pipe 6 in a sliding fit manner, a second connecting plate 12 is fixedly connected to the bottom side of the interior of the second discharging pipe 11, the bottom end of the first connecting plate 9 is fixedly connected to the top end of the first connecting rod 10, a second connecting rod 13 is fixedly connected to the bottom end of the first connecting rod 10, a second filter hopper 14 is fixedly connected to the interior of the box body 1, the second filter hopper 14 is a funnel-shaped body with a low middle part and a high periphery, a third discharging pipe 15 is communicated with the bottom end of the second filter hopper 14, the outer side wall of the second discharging pipe 11 on the inner side wall of the third discharging pipe 15 is in a sliding fit manner, the bottom end of the third discharging pipe 15 extends to the lower part of the box body 1, a sealing plate 16 is fixedly connected to the bottom side of the interior of the third discharging pipe 15, an electric cylinder 17 is fixedly connected to the bottom end of, a fourth material discharging pipe 18 is communicated with the bottom side of the right end of the third material discharging pipe 15, a first valve 19 is installed on the fourth material discharging pipe 18, a tapered toothed ring 20 is fixedly connected to the upper side of the outer side wall of the rotary barrel 4, a motor 21 is arranged on the upper side of the left end of the box body 1, the model of the motor 21 is Y80M1-2, the motor 21 is a known device directly purchased from the market and is used by people in the field, structural and functional improvements are not performed on the motor 21, detailed description is omitted here, the motor 21 is provided with a control switch matched with the motor 21, the installation position of the control switch is selected according to actual use requirements, operation and control of operators are facilitated, an output shaft of the motor 21 extends to the interior of the box body 1 and is fixedly connected with a tapered gear 22, the tapered gear 22 is meshed with the tapered toothed ring 20, a top plate 23 is installed at the top end of the box body 1, a fixed column 24 is fixedly connected to the bottom end of the top plate 23, a first connecting column 25 is fixedly connected to both the left end of the bottom side of the fixed column 24 and the right end of the bottom side of the fixed column 24, a first scraper 26 is fixedly connected to one end of the first connecting column 25 far away from the fixed column 24, a first brush 27 is fixedly connected to the bottom end of the first scraper 26, the bottom end of the brush contacts the inner side wall of the first filter hopper 5, an oil discharge pipe 28 communicated with the inside of the second box 1 is fixedly connected to the bottom side of the right end of the box 1, a second valve 29 is installed on the oil discharge pipe 28, a conical gear 22 is driven to rotate by a motor 21, the first gear drives a conical gear ring 20 to rotate, the conical gear ring 20 drives a rotary barrel 4 to rotate, the rotary barrel 4 drives the first filter hopper 5 to rotate, oil is filtered for one time by the rotation of the first filter hopper 5, the oil filtering speed, reduce the waste of oil, carry out the secondary through second filter hopper 14 and filter, improve filterable effect, improved the quality of oil.

The mesh diameter of the second filter funnel 14 is smaller than the mesh diameter of the first filter funnel 5.

Further, the rear side of the box body 1 is provided with a primary oil discharge pipe, the height position of the primary oil discharge pipe is located between the first filter hopper 5 and the second filter hopper 14, the primary filtered oil can be discharged through the primary oil discharge pipe, and the oil discharge pipe 28 can discharge the twice filtered oil, so that the oil can be separated according to the quality grade of the oil, and different application scenes are facilitated. For example, for an industrial occasion with low requirements on the content of petroleum impurities, the oil can be obtained from a primary oil discharge pipe after primary filtration; for industrial occasions with high requirements on the content of petroleum impurities, the petroleum is filtered twice, and the oil is taken from the oil discharge pipe 28. In addition, the control valves of the primary oil drain pipe and the oil drain pipe 28 may be controlled separately according to the demand for oil of different quality grades, thereby controlling the production of oil of different quality grades separately.

In this embodiment, specifically: clean the mechanism and include second spliced pole 30, the bottom fixedly connected with second scraper blade 31 of second spliced pole 30, the bottom fixedly connected with second brush 32 of second scraper blade 31, the bottom of second brush 32 and the inside wall contact of second filter hopper 14, one side fixedly connected with support column 33 of row material pipe 11 of second spliced pole 30 being close to the second, the bottom of support column 33 and the top fixed connection of second scraper blade 31, it rotates to drive second spliced pole 30 through rotatory bucket 4, second spliced pole 30 drives second scraper blade 31 and second brush 32 and rotates, make the brush clean the stone sand on second filter hopper 14.

In this embodiment, specifically: the left side on the top of roof 23 is connected with into oil pipe 34, advances the one end fixedly connected with flange 35 of keeping away from roof 23 of oil pipe 34, advances the bottom of oil pipe 34 and runs through roof 23 and extend to the inside of rotatory bucket 4, is convenient for have outside oil conveying pipeline to put through flange 35.

In this embodiment, specifically: the material guide plate 36 inclined to the lower right is fixedly connected to the bottom side inside the third material discharging pipe 15, the material guide plate 36 is in sliding fit with the telescopic rod of the electric cylinder 17, and the material guide plate 36 facilitates the flow of the stone sand into the fourth material discharging pipe 18, so that the blocking of the third material discharging pipe 15 caused by the accumulation of the stone sand in the third material discharging pipe 15 is prevented.

In this embodiment, specifically: four landing legs 37 of fixedly connected with of the bottom of box 1, the equal fixedly connected with support 38 in bottom of four landing legs 37 support box 1, improve the stability of box 1 during operation.

In this embodiment, specifically: the left end of the box body 1 is fixedly connected with a second supporting plate 39, and the top end of the second supporting plate 39 is fixedly connected with the bottom end of the motor 21 to fix the motor 21.

In this embodiment, specifically: the outer side wall of the first discharging pipe 6 is in sliding fit with a sealing sleeve 40, the bottom end of the sealing sleeve 40 is fixedly connected with the top end of the second discharging pipe 11, and the sealing performance between the first discharging pipe 6 and the second discharging pipe 11 is improved.

step one, a motor 21 drives a conical gear 22 to rotate, a first gear drives a conical gear ring 20 to rotate, the conical gear ring 20 drives a rotary barrel 4 to rotate, the rotary barrel 4 drives a first filter hopper 5 to rotate, and petroleum is filtered for one time through the rotation of the first filter hopper 5;

cleaning the surface of the first filter hopper 5 through a first brush 27, and obtaining petroleum of a first quality grade from a primary oil discharge pipe;

step three, performing secondary filtration on the petroleum through a second filter hopper 14;

driving a second connecting column 30 to rotate through the rotary barrel 4, and driving a second scraper 31 and a second brush 32 to rotate through the second connecting column 30, so that the brush cleans the stone and sand on the second filter hopper 14;

step five, opening a second valve 29, and obtaining petroleum of a second quality grade through an oil discharge pipe 28;

and sixthly, pushing the second connecting rod 13 to move upwards through the electric cylinder 17, pushing the second discharging pipe 11 and the first connecting rod 10 to move upwards through the second connecting rod 13, enabling the bottom end of the second discharging pipe 11 to move to the upper side of the third discharging pipe 15, pushing the first connecting plate 9 and the baffle plate 7 to move upwards through the first connecting rod 10, enabling the baffle plate 7 to move to the upper side of the first discharging pipe 6, opening the first valve 19, and discharging the stone sand on the first filtering hopper 5 and the second filtering hopper 14 through the fourth discharging pipe 18, wherein the first filtering hopper 5 and the second filtering hopper 14 are funnel-shaped, the middle of the funnel-shaped is low, the stone sand is convenient to gather at the bottom of the first hopper 5 and the bottom of the second hopper 14 under the action of gravity, and the stone sand is convenient to be discharged through the first discharging pipe 6, the second pipe 11, the third discharging pipe 15 and the fourth discharging pipe 18.

In summary, the sand and stone filtering apparatus for oil exploitation and the filtering method thereof, when in use, the motor 21 drives the bevel gear 22 to rotate, the first gear drives the bevel gear ring 20 to rotate, the bevel gear ring 20 drives the rotary barrel 4 to rotate, the rotary barrel 4 drives the first filter hopper 5 to rotate, the first filter hopper 5 rotates and filters oil for one time, the oil filtering speed is increased, the oil is prevented from being adsorbed on the sand, the waste of the oil is reduced, the second filter hopper 14 filters for the second time, the filtering effect is improved, the quality of the oil is improved, the first brush 27 and the second brush 32 clean the first filter hopper 5 and the second filter hopper 14 respectively, the sand can be prevented from blocking the first filter hopper 5 and the second filter hopper 14, the permeability of the first filter hopper 5 and the second filter hopper 14 is ensured, and the service life of the first filter hopper 5 and the second filter hopper 14 is prolonged, improved filterable efficiency, promote second connecting rod 13 rebound through electronic jar 17, second connecting rod 13 promotes the second and arranges material pipe 11 and head rod 10 rebound, make the bottom that the second was arranged material pipe 11 remove to the third row material top of managing 15, head rod 10 promotes first connecting plate 9 and baffle 7 rebound, make baffle 7 move to the top that first row material pipe 6, open first valve 19, the stone sand on first filter hopper 5 and the second filter hopper 14 is discharged through fourth row material pipe 18, avoided the manual work to clear up it, the work load of workman has been reduced, the practicality of its use has been improved. In addition, the primary oil discharge pipe and the oil discharge pipe 28 realize the separation of oil according to the quality grade of the oil, thereby facilitating different application scenes. The control valves of the primary oil drain pipe and the oil drain pipe 28 can be controlled respectively according to the demand for oil of different quality grades, thereby controlling the yield of oil of different quality grades respectively.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an oil development gravel and sand filtration equipment, includes box (1), its characterized in that: the upper side of the interior of the box body (1) is fixedly connected with a fixing ring (2), a rotary groove is arranged in the fixing ring (2), the interior of the rotary groove is rotatably connected with a rotary ring (3), the interior of the rotary ring (3) is fixedly connected with a rotary barrel (4), the left side and the right side of the bottom end of the rotary barrel (4) are both fixedly connected with a cleaning mechanism, the bottom side of the inner side wall of the rotary barrel (4) is fixedly connected with a first filtering hopper (5), the bottom end of the first filtering hopper (5) is communicated with a first discharging pipe (6), a baffle plate (7) is arranged in the first discharging pipe (6) in a sliding manner, supporting rods (8) are both fixedly connected to the left side and the right side of the bottom end of the baffle plate (7), a first connecting plate (9) is fixedly connected to the bottom ends of the two supporting rods (8), the first connecting plate (9) is in sliding fit with the inner side wall of the first discharging, the outside sliding fit of the bottom of first row material pipe (6) has second row material pipe (11), and the bottom side fixedly connected with second connecting plate (12) of the inside of second row material pipe (11), the top fixed connection of the bottom of first connecting plate (9) and first connecting rod (10), the bottom fixedly connected with second connecting rod (13) of first connecting rod (10), the inside fixedly connected with second filter hopper (14) of box (1), the bottom intercommunication of second filter hopper (14) has third row material pipe (15), the lateral wall sliding fit of the inside wall second row material pipe (11) of third row material pipe (15), the bottom of third row material pipe (15) extends to the below of box (1), the bottom side fixedly connected with shrouding (16) of the inside of third row material pipe (15), the bottom fixedly connected with electronic jar (17) of shrouding (16), the telescopic link of electronic jar (17) extends to the top of shrouding (16) and the bottom fixedly connected with of second connecting rod (13) is even A fourth discharging pipe (18) is communicated with the bottom side of the right end of the third discharging pipe (15), a first valve (19) is installed on the fourth discharging pipe (18), a conical gear ring (20) is fixedly connected to the upper side of the outer side wall of the rotating barrel (4), a motor (21) is arranged on the upper side of the left end of the box body (1), an output shaft of the motor (21) extends to the inner portion of the box body (1) and is fixedly connected with a conical gear (22), the conical gear (22) is meshed with the conical gear ring (20), a top plate (23) is installed at the top end of the box body (1), a fixing column (24) is fixedly connected to the bottom end of the top plate (23), a first connecting column (25) is fixedly connected to the bottom side of the left end and the bottom side of the right end of the fixing column (24), a first scraper blade (26) is fixedly connected to one end, far away from the fixing column (24), of the first scraper blade (26), a first, to the bottom of brush and the inside wall contact of first filter hopper (5), oil extraction pipe (28) of the inside switch-on of bottom side fixedly connected with of the right-hand member of box (1) and second box (1) install second valve (29) on oil extraction pipe (28), first filter hopper (5) and second filter hopper (14) are middle low infundibulate high all around, the sieve mesh diameter of second filter hopper (14) is less than the sieve mesh diameter of first filter hopper (5), the rear side of box (1) is provided with elementary oil extraction pipe, the high position of elementary oil extraction pipe is located between first filter hopper (5) and second filter hopper (14).

2. An oil extraction sand and stone filter apparatus as claimed in claim 1 wherein: cleaning the mechanism and including second spliced pole (30), bottom fixedly connected with second scraper blade (31) of second spliced pole (30), bottom fixedly connected with second brush (32) of second scraper blade (31), the bottom of second brush (32) and the inside wall contact of second filter hopper (14), one side fixedly connected with support column (33) of row material pipe (11) of being close to the second of second spliced pole (30), the bottom of support column (33) and the top fixed connection of second scraper blade (31).

3. An oil extraction sand and stone filter apparatus as claimed in claim 2 wherein: the left side on the top of roof (23) is connected with into oil pipe (34), advances oil pipe (34) one end fixedly connected with flange (35) of keeping away from roof (23), advances the inside that roof (23) and extend to rotatory bucket (4) is run through to the bottom of oil pipe (34).

4. A petroleum extraction sand and stone filtration apparatus as claimed in claim 3 wherein: and a material guide plate (36) which is inclined towards the lower right is fixedly connected to the bottom side of the interior of the third material discharging pipe (15), and the material guide plate (36) is in sliding fit with an expansion rod of the electric cylinder (17).

5. An oil extraction sand and stone filter apparatus as claimed in claim 4 wherein: the four landing legs (37) of fixedly connected with of the bottom of box (1), the equal fixedly connected with support (38) in bottom of four landing legs (37).

6. An oil extraction sand and stone filter apparatus as claimed in claim 5 wherein: the left end fixedly connected with second backup pad (39) of box (1), the top of second backup pad (39) and the bottom fixed connection of motor (21).

7. An oil extraction sand and stone filter apparatus as claimed in claim 6 wherein: the outer side wall of the first discharging pipe (6) is in sliding fit with a sealing sleeve (40), and the bottom end of the sealing sleeve (40) is fixedly connected with the top end of the second discharging pipe (11).

8. The method for filtering the sand and stone in the oil exploitation is characterized by comprising the following steps of:

the method comprises the following steps that firstly, a motor (21) drives a bevel gear (22) to rotate, a first gear drives a bevel gear ring (20) to rotate, the bevel gear ring (20) drives a rotary barrel (4) to rotate, the rotary barrel (4) drives a first filter hopper (5) to rotate, and petroleum is filtered for the first time through the rotation of the first filter hopper (5);

cleaning the surface of the first filter hopper (5) through a first brush (27) to obtain petroleum of a first quality grade from a primary oil discharge pipe;

step three, performing secondary filtration on the petroleum through a second filter hopper (14);

driving a second connecting column (30) to rotate through a rotating barrel (4), driving a second scraper (31) and a second brush (32) to rotate through the second connecting column (30), and enabling the brush to clean the stone sand on the second filter hopper (14);

step five, opening a second valve (29) and obtaining the petroleum with a second quality grade through an oil discharge pipe (28);

and sixthly, pushing a second connecting rod (13) to move upwards through an electric cylinder (17), pushing a second discharging pipe (11) and a first connecting rod (10) to move upwards through the second connecting rod (13), moving the bottom end of the second discharging pipe (11) to the position above a third discharging pipe (15), pushing a first connecting plate (9) and a baffle (7) to move upwards through the first connecting rod (10), moving the baffle (7) to the position above a first discharging pipe (6), opening a first valve (19), and discharging the stone sand on the first filtering hopper (5) and the second filtering hopper (14) through a fourth discharging pipe (18).