Pressurizing and filtering device for finished lubricant for drilling fluid

Abstract

The utility model relates to the technical field of drilling lubricant production, in particular to a lubricant finished product pressurizing and filtering device for drilling fluid, which comprises a primary filter tank, a liquid outlet of the primary filter tank is connected with a filter, the primary filter tank comprises a shell, and a filter cartridge is arranged in the shell. The upper and lower ends of the filter cartridge are connected with the inner wall of the shell to divide the inner cavity of the shell into a first-stage filter cavity and a first-stage filtrate cavity; the first-stage filtering cavity is communicated with the air inlet and the feeding port, a reciprocating screw rod is fixed to the bottom in the first-stage filtering cavity, a driven rod is movably installed on the surface of the reciprocating screw rod, a plurality of stirring rods are arranged on the driven rod, and cleaning brushes are arranged at the outer ends of the stirring rods; a first driving motor is fixed to the upper surface of the top of the first-stage filter box, the output end of the first driving motor is fixedly connected with a driving rod, and the driving rod is vertically slidably connected with a driven rod. According to the utility model, the filter screen is cleaned while filtering is carried out, so that frequent shutdown cleaning caused by blockage of the filter screen is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling lubricant production, in particular to a pressure filtering device for a finished lubricant product for drilling fluid. Background Art

[0002] Drilling fluid lubricant is a chemical agent specially used for drilling operations. It is mainly used to reduce the flow resistance of drilling fluid and the friction coefficient of filter cake, so as to reduce the torque of drill bit and enhance its water horsepower, effectively preventing sticking. Drilling fluid lubricant plays a vital role in drilling operations. It can not only reduce the wear and fatigue of drilling tools and extend the life of drill bit bearings, but also reduce the friction resistance of drill string lifting, shorten the time of drilling, save power and improve drilling efficiency. Liquid drilling fluid lubricants are mostly formulated from animal and plant oil derivatives, synthetic compounds (such as fatty phenolamines) and surfactants. They have good lubricity and can form adsorption films on the surfaces of metals, rocks and clays, changing solid-solid friction to friction between the non-polar ends of the active agent or between oil films, thereby significantly reducing the friction between the drill string and the well wall.

[0003] Due to differences in the synthesis process, the raw materials used in the production of drilling fluid lubricants are also different. In the actual production process, some raw materials contain impurities, especially oil-insoluble matter, which has a serious impact on the performance of the lubricant. Removing impurities and insoluble matter in the lubricant to improve the performance of the lubricant is a key link in production. Common filtering devices have slow filtering rates and poor effects. After the filtration is completed, there are still impurities remaining, which urgently needs to be improved.

[0004] Chinese utility model patent announcement number CN215876429U proposes a pressure filtering device for lubricant products for drilling fluid, including a base and a drive tube, the top of the base is fixedly mounted with a drive tube, the side wall of the drive tube is fixedly mounted with a first pump body and a second pump body, a rotating disk is rotatably mounted inside the drive tube, a motor is fixedly mounted at one end of the drive tube, and the motor output shaft extends to the inside of the drive tube and is fixedly connected to the rotating disk. It can realize pressure filtering of lubricants, and by applying double pressure by a motor, the filtering efficiency and filtering effect of the lubricant are improved. However, non-oil-soluble substances in the lubricant are easy to adhere to the filter plate, causing the filter tube to be blocked. Therefore, it is necessary to frequently stop the machine to clean the filter plate in the filter tube, which affects the production efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a pressure filtering device for a finished product of a lubricant for drilling fluid, which can clean the filter screen during filtering, thus avoiding frequent shutdown for cleaning caused by filter screen blockage and improving production efficiency.

[0006] The utility model discloses a pressure filtering device for lubricant finished product for drilling fluid, comprising a first-stage filter box, wherein the liquid outlet of the first-stage filter box is connected to the filter, the first-stage filter box comprises a shell, a filter cartridge is arranged in the shell, the upper and lower ends of the filter cartridge are connected to the inner wall of the shell to divide the inner cavity of the shell into a first-stage filter chamber and a first-stage filtrate chamber, the interior of the filter cartridge is a first-stage filter chamber, and a first-stage filtrate chamber is formed between the filter cartridge and the inner wall of the shell; the first-stage filter chamber is connected to the air inlet and the feed inlet, a reciprocating screw is fixed at the bottom of the first-stage filter chamber, a driven rod is movably installed on the surface of the reciprocating screw, a plurality of stirring rods are arranged on the driven rod, a cleaning brush is arranged at the outer end of the stirring rod, and the cleaning brush is against the inner wall of the filter cartridge; a first driving motor is fixed to the upper surface of the top of the first-stage filter box, the output end of the first driving motor is fixedly connected to the active rod, the active rod passes through the top wall of the first-stage filter box and is sealed and rotatably connected to the top wall of the first-stage filter box, and the active rod is slidably connected to the driven rod up and down.

[0007] Preferably, the filter includes an outer shell, a feed pipe is provided on the side wall of the outer shell, the feed pipe is connected to the liquid outlet of the first-level filter box, a discharge pipe is provided on the top wall of the outer shell, a barrel-shaped filter screen with an opening on the top is provided in the outer shell, the top of the filter screen is rotatably sealed and connected to the inner top wall of the outer shell, the filter screen divides the inner cavity of the outer shell into a secondary filter cavity and a secondary filtrate cavity, the outer side wall and outer bottom wall of the filter screen, the inner side wall and the inner bottom wall of the outer shell form a secondary filter cavity, the inner wall of the filter screen and the inner top wall of the outer shell form a secondary filtrate cavity, the feed pipe is connected to the secondary filter cavity, and the discharge pipe is connected to the secondary filtrate cavity.

[0008] Preferably, a plurality of vertically arranged docking grooves are provided on the top of the driven rod, and a portion of the outer wall of the active rod extending into the first-stage filter box is provided with a convex strip, which is slidably connected to the docking groove.

[0009] Preferably, the top end of the reciprocating screw is fixedly connected to the connecting rod, and the top end of the connecting rod is rotatably connected to the bottom end of the active rod. The setting of the connecting rod has a reinforcing effect on both the reciprocating screw and the active rod.

[0010] Preferably, a high-pressure air pipe is provided on the air inlet.

[0011] Preferably, a second drive motor is fixed to the lower surface of the bottom of the filter, and the bottom of the filter is connected to the output end of the second drive motor through a rotating rod. The rotating rod passes through the outer shell and is sealed and rotatably connected to the outer shell; a brush is spirally arranged on the inner wall of the outer shell, and the brush is against the outer wall of the filter.

[0012] Preferably, a slag collecting plate is radially provided at the bottom of the filter screen, the bottom of the slag collecting plate is close to or against the lower bottom surface of the shell, a concave slag collecting part is provided at the bottom of the secondary filter cavity, and a slag outlet is provided at the bottom of the slag collecting part.

[0013] Preferably, a control valve is provided on the discharge pipe.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The lubricant is injected from the feed port. The liquid enters the primary filtrate chamber after being filtered through the filter cartridge from the primary filter chamber, and then enters the filter from the outlet of the primary filtrate chamber for a second filtration. It first enters the secondary filter chamber, and then enters the secondary filtrate chamber after being filtered through the filter screen, and then is discharged through the discharge pipe. The two-stage filtration improves the filtration effect of the lubricant; high-pressure gas is introduced through the air inlet to pressurize the liquid, which accelerates the filtration speed of the lubricant in the primary filter box;

[0016] 2. The first driving motor drives the active rod to rotate, and the active rod drives the driven rod to rotate. At the same time, the driven rod moves up and down along the reciprocating screw rod. The stirring rod on the driven rod stirs the lubricant to prevent impurities in the lubricant from being deposited at the bottom. While the driven rod rotates and moves up and down, the cleaning brush cleans the inner wall of the filter cartridge to prevent impurities from adhering to the inner wall of the filter cartridge and causing blockage, thereby greatly extending the time interval for stopping the filter cartridge for cleaning;

[0017] 3. The utility model can also clean the filter screen of the filter without stopping the machine, thereby improving work efficiency. Since a brush is spirally arranged on the inner wall of the filter housing, when the second drive motor drives the filter screen to rotate, the spirally arranged brush can scrape off impurities on the outer wall of the filter screen, push them to the lower part of the filter screen, and then drop them to the bottom of the housing. The slag collecting plate scrapes off impurities from the bottom of the housing as the filter screen rotates. When it rotates to the slag collecting part, the impurities fall into the slag collecting part and are discharged from the slag outlet when they accumulate to a certain amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a finished product pressurized filtering device for lubricant used in drilling fluid of the utility model;

[0019] Figure 2 1. It is a schematic diagram of the structure of the driven rod and the driven rod;

[0020] Figure 3 It is a schematic diagram of the disassembled structure of the active rod and the driven rod;

[0021] Figure 4 is a schematic diagram of the filter structure;

[0022] Figure 5 It is a schematic diagram of the filter screen structure;

[0023] Figure 6 is a schematic diagram of the cross-sectional structure of the filter housing;

[0024] Figure 7 1. It is a schematic diagram of the structure of the active rod and the driven rod from a top view;

[0025] In the figure: 1. primary filter box; 11. shell; 12. filter cartridge; 13. primary filter chamber; 14. primary filtrate chamber; 15. air inlet; 16. feed inlet; 17. reciprocating screw; 18. driven rod; 19. stirring rod; 110. cleaning brush; 111. first drive motor; 112. active rod; 113. high-pressure air pipe; 114. docking chute; 115. convex strip; 116. connecting rod; 2. filter; 21. shell; 22. feed pipe; 23. discharge pipe; 24. filter screen; 25. secondary filter chamber; 26. secondary filtrate chamber; 27. second drive motor; 28. rotating rod; 29. ​​brush; 210. slag collecting plate; 211. slag collecting part; 212. slag outlet; 213. control valve. DETAILED DESCRIPTION

[0026] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0027] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation for the convenience of expression and do not represent a sequential relationship.

[0028] like Figure 1 , Figure 2 As shown, the finished product pressure filtering device for lubricant for drilling fluid comprises a primary filter box 1, the liquid outlet of the primary filter box 1 is connected to the filter 2, the primary filter box 1 comprises a shell 11, a filter cartridge 12 is arranged in the shell 11, the upper and lower ends of the filter cartridge 12 are connected to the inner wall of the shell 11 to divide the inner cavity of the shell 11 into a primary filter cavity 13 and a primary filtrate cavity 14, the interior of the filter cartridge 12 is the primary filter cavity 13, and the primary filtrate cavity 14 is formed between the filter cartridge 12 and the inner wall of the shell 11; the primary filter cavity 13 is connected to the air inlet 15 and the feed inlet 16, and the primary filter cavity A reciprocating screw rod 17 is fixed to the bottom of the inner part 13, and a driven rod 18 is movably installed on the surface of the reciprocating screw rod 17. A plurality of stirring rods 19 are arranged on the driven rod 18. A cleaning brush 110 is arranged at the outer end of the stirring rod 19, and the cleaning brush 110 abuts against the inner wall of the filter cartridge 12; a first driving motor 111 is fixed to the upper surface of the top of the primary filter box 1, and the output end of the first driving motor 111 is fixedly connected to the active rod 112, the active rod 112 penetrates the top wall of the primary filter box 1 and is sealed and rotatably connected to the top wall of the primary filter box 1, and the active rod 112 is connected to the driven rod 18 in an up and down sliding manner.

[0029] like Figure 4As shown, the filter 2 includes an outer shell 21, a feed pipe 22 is provided on the side wall of the outer shell 21, the feed pipe 22 is connected to the liquid outlet of the primary filter box 1, a discharge pipe 23 is provided on the top wall of the outer shell 21, a barrel-shaped filter screen 24 with an opening on the top is provided in the outer shell 21, the top of the filter screen 24 is rotatably sealed and connected to the inner top wall of the outer shell 21, the filter screen 24 divides the inner cavity of the outer shell 21 into a secondary filter cavity 25 and a secondary filtrate cavity 26, the outer side wall and the outer bottom wall of the filter screen 24, the inner side wall and the inner bottom wall of the outer shell 21 form a secondary filter cavity 25, the inner wall of the filter screen 24 and the inner top wall of the outer shell 21 form a secondary filtrate cavity 26, the feed pipe 22 is connected to the secondary filter cavity 25, and the discharge pipe 23 is connected to the secondary filtrate cavity 26.

[0030] like Figure 7 As shown, a plurality of vertically arranged docking grooves 114 are provided on the top of the driven rod 18 , and a protrusion 115 is provided on the outer wall of the portion of the active rod 112 extending into the first-stage filter box 1 , and the protrusion 115 is slidably connected with the docking grooves 114 .

[0031] like Figure 3 As shown, the top end of the reciprocating screw rod 17 is fixedly connected to the connecting rod 116, and the top end of the connecting rod 116 is rotatably connected to the bottom end of the active rod 112.

[0032] The air inlet 15 is provided with a high-pressure air pipe 113 .

[0033] like Figure 4 , Figure 6 As shown, a second drive motor 27 is fixed to the lower surface of the bottom of the filter 2, and the bottom of the filter screen 24 is connected to the output end of the second drive motor 27 through a rotating rod 28. The rotating rod 28 passes through the outer shell 21 and is sealed and rotatably connected to the outer shell 21; a brush 29 is spirally arranged on the inner wall of the outer shell 21, and the brush 29 is against the outer wall of the filter screen 24.

[0034] like Figure 5 As shown, a slag collecting plate 210 is radially provided at the bottom of the filter screen 24, the bottom of the slag collecting plate 210 is against the lower bottom surface of the shell 21, a concave slag collecting portion 211 is provided at the bottom of the secondary filter cavity 25, and a slag outlet 212 is provided at the bottom of the slag collecting portion 211.

[0035] The discharge pipe 23 is provided with a control valve 213 .

[0036] The working process is as follows: the lubricant is injected from the feed port 16, and the liquid enters the primary filtrate chamber 14 after being filtered from the primary filter chamber 13 through the filter cartridge 12, and the high-pressure gas is introduced through the high-pressure air pipe 113 and the air inlet 15 to pressurize the liquid, thereby accelerating the filtering speed of the lubricant in the primary filter box 1; at the same time, the first drive motor 111 drives the active rod 112 to rotate, and the active rod 112 drives the driven rod 18 to rotate, and at the same time, the driven rod 18 moves up and down along the reciprocating screw rod 17, and the stirring rod 19 on the driven rod 18 stirs the lubricant to prevent impurities in the lubricant from being deposited at the bottom, and while the driven rod 18 rotates and moves up and down, the cleaning brush 110 cleans the inner wall of the filter cartridge 12 to prevent impurities from adhering to the inner wall of the filter cartridge 12 and causing blockage, thereby greatly extending the time interval for shutdown cleaning;

[0037] The lubricant enters the filter 2 from the outlet of the primary filtrate chamber 14, first enters the secondary filtration chamber 25, enters the secondary filtrate chamber 26 after being filtered by the filter screen 24, and is discharged through the discharge pipe 23. In this way, the two-stage filtration improves the filtering effect of the lubricant.

[0038] During operation, the second drive motor 27 can be started regularly to clean the filter 24. A brush 29 is spirally provided on the inner wall of the outer shell 21 of the filter 2. When the second drive motor 27 drives the filter 24 to rotate, the spirally provided brush 29 can scrape off impurities on the outer wall of the filter 24 and push them to the lower part of the filter 24, and then drop them to the bottom of the outer shell 21. The slag collecting plate 210 rotates with the filter 24 to scrape off impurities from the bottom of the outer shell 21. When it rotates to the slag collecting part 211, the impurities fall into the slag collecting part 211, and are discharged from the slag outlet 212 when accumulated to a certain amount.

Claims

1. A pressure filtering device for a finished lubricant product for drilling fluid, characterized in that: The invention comprises a primary filter box (1), wherein the liquid outlet of the primary filter box (1) is connected to a filter (2), the primary filter box (1) comprises a shell (11), a filter cartridge (12) is arranged in the shell (11), the upper and lower ends of the filter cartridge (12) are connected to the inner wall of the shell (11), so that the inner cavity of the shell (11) is divided into a primary filter cavity (13) and a primary filtrate cavity (14), the interior of the filter cartridge (12) is a primary filter cavity (13), and a primary filtrate cavity (14) is formed between the filter cartridge (12) and the inner wall of the shell (11); the primary filter cavity (13) is connected to an air inlet (15) and a feed inlet (16), and the bottom of the primary filter cavity (13) is fixed. A reciprocating screw rod (17) is provided, a driven rod (18) is movably mounted on the surface of the reciprocating screw rod (17), a plurality of stirring rods (19) are provided on the driven rod (18), a cleaning brush (110) is provided at the outer end of the stirring rod (19), and the cleaning brush (110) abuts against the inner wall of the filter cartridge (12); a first driving motor (111) is fixed to the upper surface of the top of the primary filter box (1), an output end of the first driving motor (111) is fixedly connected to an active rod (112), the active rod (112) penetrates the top wall of the primary filter box (1) and is sealingly and rotatably connected to the top wall of the primary filter box (1), and the active rod (112) is slidably connected to the driven rod (18) up and down.

2. A pressure filtering device for a finished lubricant product for drilling fluid according to claim 1, characterized in that: The filter (2) comprises a housing (21). A feed pipe (22) is provided on a side wall of the housing (21). The feed pipe (22) is connected to a liquid outlet of a primary filter box (1). A discharge pipe (23) is provided on a top wall of the housing (21). A filter screen (24) in the shape of a cylinder with an opening at the top is provided inside the housing (21). The top of the filter screen (24) is rotatably sealedly connected to the inner top wall of the housing (21). The filter screen (24) divides the inner cavity of the housing (21) into a secondary filter cavity (25) and a secondary filtrate cavity (26). The outer side wall and the outer bottom wall of the filter screen (24), the inner side wall of the housing (21) and the inner bottom wall of the housing (21) form a secondary filter cavity (25). The inner wall of the filter screen (24) and the inner top wall of the housing (21) form a secondary filtrate cavity (26). The feed pipe (22) is connected to the secondary filter cavity (25), and the discharge pipe (23) is connected to the secondary filtrate cavity (26).

3. The pressure filtering device for the finished product of the lubricant for drilling fluid according to claim 1, characterized in that: A plurality of vertically arranged docking grooves (114) are provided on the top of the driven rod (18), and a convex strip (115) is provided on the outer wall of the portion of the active rod (112) extending into the first-stage filter box (1), and the convex strip (115) is slidably connected to the docking groove (114).

4. The pressure filtering device for the finished lubricant product for drilling fluid according to claim 1, characterized in that: The top end of the reciprocating screw rod (17) is fixedly connected to the connecting rod (116), and the top end of the connecting rod (116) is rotatably connected to the bottom end of the active rod (112).

5. The pressure filtering device for the finished lubricant product for drilling fluid according to claim 1, characterized in that: A high-pressure air pipe (113) is provided on the air inlet (15).

6. The pressure filtering device for the finished lubricant product for drilling fluid according to claim 2, characterized in that: A second drive motor (27) is fixed to the lower surface of the bottom of the filter (2); the bottom of the filter screen (24) is connected to the output end of the second drive motor (27) via a rotating rod (28); the rotating rod (28) passes through the outer shell (21) and is sealed and rotatably connected to the outer shell (21); a brush (29) is spirally arranged on the inner wall of the outer shell (21); the brush (29) abuts against the outer wall of the filter screen (24).

7. The pressure filtering device for the finished lubricant product for drilling fluid according to claim 2, characterized in that: A slag collecting plate (210) is radially provided at the bottom of the filter screen (24), a concave slag collecting portion (211) is provided at the bottom of the secondary filter cavity (25), and a slag outlet (212) is provided at the bottom of the slag collecting portion (211).

8. The pressure filtering device for the finished lubricant product for drilling fluid according to claim 2, characterized in that: A control valve (213) is provided on the discharge pipe (23).

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