Flow-back sand-liquid separation and circulation equipment for hydraulic sand blasting perforation of oil field

Abstract

The invention relates to the technical field of solid-liquid separation, and discloses oil field hydraulic sand blasting perforation flowback sand-liquid separation circulation equipment which comprises a supporting plate, the top end of the supporting plate is connected with a hydraulic separator, the bottom end of the supporting plate is connected with a separation box through a bolt, and a screening assembly is arranged in the separation box. A plurality of roller shafts are rotationally connected to the interior of the separation box, the outer surfaces of the roller shafts are in transmission connection with a mesh belt, lattice bars are installed on the outer surface of the mesh belt, a side plate is installed on the outer surface of the separation box, a double-belt wheel is fixedly connected to one end of one roller shaft, and a first belt wheel is rotationally connected to the outer surface of the separation box. Through the unique structural design of the hydraulic separator, the sand-liquid inlet pipe is tangent to the column casing and forms an included angle with the column casing, so that flowback liquid forms high-speed rotating spiral flow, primary sand-water separation is realized by centrifugal force, meanwhile, the filter cartridge can prevent light sand from flowing out along with water, and all parts are connected through flanges, so that replacement after the lining is abraded is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of solid-liquid separation, in particular to oilfield hydraulic sandblasting perforation flowback sand-liquid separation and circulation equipment. Background Art

[0002] Hydraulic sandblasting perforation is a critical technology in oilfield operations. It uses high-pressure water jets, carrying abrasives, to create holes in casing and formations, establishing pathways for subsequent oil and gas extraction. After sandblasting, a large amount of high-sand wastewater returns to the surface, becoming a major source of water pollution in oilfields. The primary task of wastewater treatment is to separate the sand from the high-sand flowback.

[0003] According to the search, Chinese patent literature, announcement number: CN105363574A, discloses an oilfield hydraulic sandblasting perforation return sand and liquid separation circulation equipment. The equipment uses dual forces to efficiently separate solid sand particles, namely centrifugal force and inertial force. After the return liquid swirls from the buffer chamber into the acceleration wide gap, the tangential velocity and axial velocity of the liquid increase rapidly. Under the action of centrifugal force, the sand particles are thrown to the inner wall of the separation tank. Many sand particles gather and slide along the tank wall to the bottom of the tank and sink to the bottom of the tank. After the accelerated liquid leaves the acceleration channel, the flow rate slows down, and is supported by the liquid in the lower chamber, the flow rate is greatly reduced, and the solid sand particles are rushed to the bottom of the separation tank under the action of inertial force, gather and settle, which greatly reduces the erosion of the equipment during the separation process.

[0004] However, in actual use of the above equipment, the return fluid is only separated from the sand and water by the separation tank in combination with the tangential force, so the sand and water separation is not thorough enough. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides an oilfield hydraulic sandblasting perforation return sand and liquid separation circulation equipment. By setting up a hydraulic separator and a screening component, the return liquid can be separated in multiple stages, so that the sand and water separation is thorough, thereby solving the above technical problems.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose x, the present invention provides the following technical solutions: an oilfield hydraulic sandblasting perforation return sand and liquid separation circulation equipment, comprising a support plate, the top of the support plate is connected to a hydraulic separator, the bottom end of the support plate is connected to a separation box by bolts, a screening assembly is provided inside the separation box, and a plurality of rollers are rotatably connected to the inside of the separation box, the outer surface of the roller is transmission-connected to a mesh belt, the outer surface of the mesh belt is installed with lattice bars, the outer surface of the separation box is installed with side plates, one end of one of the rollers is fixedly connected to a double pulley, the outer surface of the separation box is rotatably connected to a No. 1 pulley, and the end face center of the No. 1 pulley is connected to a drive motor;

[0009] The hydraulic separator includes a column, the bottom of the column is connected to a cone through a flange, the bottom of the cone is connected to a sand discharge pipe through a flange, the top of the column is connected to a top cover through a flange, the top of the top cover is connected to a liquid discharge pipe through bolts, and a sand and liquid inlet pipe is fixedly connected to the outer wall of the column;

[0010] The screening assembly includes a screen plate, the top of the screen plate is fixedly connected to a frame, the outer surface of the frame is fixedly connected to a connecting rod, the interior of the connecting rod is slidably connected to a sleeve rod, the outer surface of the sleeve rod is sleeved with a spring, the top of the sleeve rod is fixedly connected to a fixed block, the lower surface of the screen plate is installed with a shaft sleeve, the interior of the shaft sleeve is rotatably connected to a rotating rod, the outer surface of the rotating rod is clamped with an eccentric block, and one end of the rotating rod is fixedly connected to the second pulley.

[0011] Preferably, the outer surface of the column is connected to a support plate by bolts, the sand and liquid inlet pipe has an angle of 5 degrees with the horizontal plane, and the sand and liquid inlet pipe is tangent to the outer wall of the column.

[0012] Preferably, an inner liner is attached to the inner walls of the cylindrical tube, the conical tube and the sand discharge pipe, and a positioning groove and a tangential opening are provided on the outer surface of the liner.

[0013] Preferably, a positioning bar is fixedly connected to the inner wall of the column, the positioning bar cooperates with the positioning groove, and the inside of the top cover is connected to the filter cartridge by bolts.

[0014] Preferably, a guide plate is fixedly connected to the inner wall of the separation box, and the guide plate is located below the sand discharge pipe.

[0015] Preferably, a plurality of equally spaced lattice bars are mounted on the outer surface of the mesh belt by bolts, and a first synchronous belt is connected between the double pulley and the first pulley for transmission.

[0016] Preferably, four straight grooves are opened through the outer surface of the separation box, and connecting rods are inserted into the straight grooves. The bottom end of the sleeve rod is fixedly connected to the limiting block, and the top end of the spring contacts the fixed block, and the fixed block is fixedly connected to the outer wall of the separation box.

[0017] Preferably, two shaft sleeves are installed on the lower surface of the screen plate, a rotating rod is rotatably connected between the two shaft sleeves, and a second synchronous belt is transmission-connected between the second pulley and the double pulley.

[0018] Preferably, an overflow pipe is fixedly connected to one side of the separation box.

[0019] Compared with the prior art, the present invention provides an oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment, which has the following beneficial effects:

[0020] The present invention provides an oilfield hydraulic sandblasting perforation return sand and liquid separation circulation equipment. Through the unique structural design of the hydraulic separator, the sand and liquid inlet pipe is tangent to the column and has an angle, so that the return liquid forms a high-speed rotating spiral flow, and uses centrifugal force to achieve preliminary separation of sand and water. At the same time, the filter cartridge can prevent light sand and gravel from flowing out with water, and the various components are connected by flanges for easy replacement after the lining is worn; the subsequent screening component further filters the water-containing sand and gravel, the screen plate is tilted to facilitate the falling of sand and gravel, and the eccentric block drives the screen plate to vibrate and accelerate separation. Finally, the mesh belt and grid bars cooperate to transport the sand and gravel, thereby achieving efficient and multi-stage separation of sand and liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic three-dimensional diagram of the structure of the present invention;

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

[0023] Figure 3 It is an exploded schematic diagram of the hydraulic separator in the structure of the present invention;

[0024] Figure 4 It is a partial three-dimensional schematic diagram of the structure of the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of the screening component in the structure of the present invention;

[0026] Figure 6 The structure of the present invention Figure 4 A partial enlarged schematic diagram of the middle A.

[0027] 1. Support plate; 2. Hydraulic separator; 21. Column; 22. Cone; 23. Sand discharge pipe; 24. Top cover; 25. Liquid discharge pipe; 26. Sand and liquid inlet pipe; 27. Liner; 28. Positioning groove; 29. ​​Tangential port; 210. Filter cartridge; 3. Separation box; 4. Screening assembly; 41. Screen plate; 42. Frame; 43. Connecting rod; 44. Sleeve rod; 45. Spring; 46. Fixed block; 47. Bushing; 48. Rotating rod; 49. Eccentric block; 410. No. 2 pulley; 5. Roller; 6. Mesh belt; 7. Grid; 8. Side plate; 9. Double pulley; 10. No. 1 pulley; 11. Drive motor; 12. Guide plate; 13. First synchronous belt; 14. Straight groove; 15. Second synchronous belt; 16. Overflow pipe. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-6 , an oilfield hydraulic sandblasting perforation return sand and liquid separation circulation equipment, including a support plate 1, the top of the support plate 1 is connected to a hydraulic separator 2, the bottom end of the support plate 1 is connected to a separation box 3 by bolts, the interior of the separation box 3 is provided with a screening assembly 4, and the interior of the separation box 3 is rotatably connected to a plurality of rollers 5, the outer surface of the rollers 5 is transmission-connected to a mesh belt 6, the outer surface of the mesh belt 6 is installed with grid bars 7, the outer surface of the separation box 3 is installed with a side plate 8, one end of one of the rollers 5 is fixedly connected to a double pulley 9, the outer surface of the separation box 3 is rotatably connected to a first pulley 10, and the end center of the first pulley 10 is connected to a drive motor 11;

[0030] The hydraulic separator 2 includes a column 21, the bottom of the column 21 is connected to a cone 22 via a flange, the bottom of the cone 22 is connected to a sand discharge pipe 23 via a flange, the top of the column 21 is connected to a top cover 24 via a flange, the top of the top cover 24 is connected to a liquid discharge pipe 25 via bolts, and a sand and liquid inlet pipe 26 is fixedly connected to the outer wall of the column 21;

[0031] The screening assembly 4 includes a sieve plate 41, the top of the sieve plate 41 is fixedly connected to a frame 42, the outer surface of the frame 42 is fixedly connected to a connecting rod 43, the inside of the connecting rod 43 is slidably connected to a sleeve rod 44, the outer surface of the sleeve rod 44 is sleeved with a spring 45, the top of the sleeve rod 44 is fixedly connected to a fixed block 46, the lower surface of the sieve plate 41 is installed with a shaft sleeve 47, the inside of the shaft sleeve 47 is rotatably connected to a rotating rod 48, the outer surface of the rotating rod 48 is clamped with an eccentric block 49, and one end of the rotating rod 48 is fixedly connected to the second pulley 410.

[0032] Specifically, the outer surface of the column 21 is connected to the support plate 1 by bolts, the sand and liquid inlet pipe 26 has an angle of 5 degrees with the horizontal plane, and the sand and liquid inlet pipe 26 is tangent to the outer wall of the column 21, and the inner walls of the column 21, the cone 22 and the sand discharge pipe 23 are fitted with an inner lining 27, and a positioning groove 28 is provided on the outer surface of the inner lining 27, and a tangential opening 29 is provided on the outer surface of the inner lining 27. A positioning strip is fixedly connected to the inner wall of the column 21, and the positioning strip cooperates with the positioning groove 28. The inside of the top cover 24 is connected to the filter cartridge 210 by bolts.

[0033] The return fluid is input from the sand and liquid inlet pipe 26 and enters the interior of the liner 27. Since the return fluid forms a high-speed rotating spiral flow due to the tangential feeding, the sand and gravel particles with higher density in the return fluid are thrown to the cylinder wall of the liner 27 under the action of centrifugal force, and move downward along the cylinder wall, and finally discharged from the sand discharge pipe 23 at the bottom; while the water with lower density gathers toward the center and enters the filter cartridge 210 along with the rising water flow in the center, and then enters the liquid discharge pipe 25 for discharge, thereby achieving the return fluid The primary separation of sand and water can prevent some light sand and gravel from entering the liquid discharge pipe 25 with the water flow by setting the filter cartridge 210. Since the column 21, cone 22, sand discharge pipe 23 and top cover 24 are connected by flange rings, they can be disassembled and replaced after the lining 27 is severely worn; when replacing, the positioning groove 28 on the outer surface of the lining 27 is aligned with the positioning strip on the inner wall of the column 21, so that the tangential port 29 on the outer surface of the lining 27 can be connected to the sand and liquid inlet pipe 26.

[0034] Specifically, a guide plate 12 is fixedly connected to the inner wall of the separation box 3, and the guide plate 12 is located below the sand discharge pipe 23. The outer surface of the mesh belt 6 is installed with multiple equally spaced grid bars 7 by bolts, and a first synchronous belt 13 is connected between the double pulley 9 and the No. 1 pulley 10 for transmission.

[0035] After the return fluid passes through the primary separation of the hydraulic separator 2, the water-containing sand and gravel are discharged from the sand discharge pipe 23 and fall on the guide plate 12, so that the water-containing sand and gravel will be diverted to the screen plate 41. A screen is installed on the upper surface of the screen plate 41, so that the water-containing sand and gravel can be further filtered and separated, and because the screen plate 41 is inclined, the sand and gravel will gradually fall onto the mesh belt 6, and by starting the drive motor 11 to drive the No. 1 pulley 10 to rotate, the No. 1 pulley 10 drives the first synchronous belt 13, the first synchronous belt 13 drives the double pulley 9 to rotate, and the double pulley 9 drives one of the rollers 5 to rotate. With the cooperation of the other rollers 5, the mesh belt 6 can be driven to circulate, and with the cooperation of multiple grid bars 7, the sand and gravel can be transported upward, so that the sand and gravel are finally transported out of the separation box 3, and the sand transporter can be used to catch the transported sand and gravel, so that these sand and gravel can be recycled for hydraulic sand blasting and perforating operations.

[0036] Specifically, four straight grooves 14 are provided through the outer surface of the separation box 3, and a connecting rod 43 is inserted into the straight groove 14. The bottom end of the sleeve rod 44 is fixedly connected to the limiting block, and the top end of the spring 45 contacts the fixed block 46. The fixed block 46 is fixedly connected to the outer wall of the separation box 3. Two shaft sleeves 47 are installed on the lower surface of the screen plate 41, and a rotating rod 48 is rotatably connected between the two shaft sleeves 47. A second synchronous belt 15 is connected to the second pulley 410 and the double pulley 9 for transmission, and an overflow pipe 16 is fixedly connected to one side of the separation box 3.

[0037] When the double pulley 9 rotates, it can also drive the second synchronous belt 15, and the second synchronous belt 15 drives the second pulley 410 to rotate, and the second pulley 410 drives the rotating rod 48 to rotate. The rotating rod 48 drives the eccentric block 49 to rotate with the cooperation of the two shaft sleeves 47. Since the center of gravity of the eccentric block 49 does not coincide with the axis of the rotating rod 48, the centrifugal force generated by its circular motion will cause the rotating rod 48 to vibrate periodically and generate a vibration force, thereby driving the screen plate 41 to vibrate. During the vibration of the screen plate 41, the separation of sand and water can be accelerated. When the screen plate 41 vibrates violently, the spring 45 can effectively buffer the impact force generated by the vibration of the screen plate 41, thereby preventing the screen plate 41 from being damaged due to excessive impact.

[0038] During use, the return liquid is input from the sand and liquid inlet pipe 26 and enters the interior of the liner 27. Due to the tangential feeding, a high-speed rotating spiral flow is formed. The sand and gravel particles with high density are thrown to the wall of the liner 27 under the action of centrifugal force and move downward along the wall to be discharged from the bottom sand discharge pipe 23. The water with low density gathers toward the center and enters the liquid discharge pipe 25 through the filter cartridge 210 for discharge, thus realizing the primary separation of sand and water. The water-containing sand and gravel after the primary separation by the hydraulic separator 2 are discharged from the sand discharge pipe 23 and fall on the guide plate 12, and are guided to the inclined screen plate 41 equipped with a screen for further filtration and separation. The drive motor 11 is started to drive the No. 1 pulley 10 rotates, the No. 1 pulley 10 drives the double pulley 9 to rotate through the first synchronous belt 13, the double pulley 9 drives one of the rollers 5 to rotate, and with the cooperation of the other rollers 5, drives the mesh belt 6 to circulate, and transports the sand and gravel upward out of the separation box 3 through the grid bars 7, and is caught by a sand transport truck for recycling; the double pulley 9 rotates and drives the No. 2 pulley 410 to rotate through the second synchronous belt 15, the No. 2 pulley 410 drives the rotating rod 48 to rotate, and the rotating rod 48 drives the eccentric block 49 to rotate. Because the center of gravity of the eccentric block 49 does not coincide with the axis of the rotating rod 48, centrifugal force is generated to cause the rotating rod 48 to vibrate, driving the screen plate 41 to vibrate and accelerate the separation of sand and gravel and water.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment, comprising a support plate (1), characterized in that: The top end of the support plate (1) is connected to a hydraulic separator (2), the bottom end of the support plate (1) is connected to a separation box (3) by bolts, a screening assembly (4) is provided inside the separation box (3), and a plurality of rollers (5) are rotatably connected inside the separation box (3), the outer surface of the rollers (5) is transmission-connected to a mesh belt (6), the outer surface of the mesh belt (6) is installed with a grid bar (7), the outer surface of the separation box (3) is installed with a side plate (8), one end of one of the rollers (5) is fixedly connected to a double pulley (9), the outer surface of the separation box (3) is rotatably connected to a first pulley (10), and the center of the end surface of the first pulley (10) is connected to a drive motor (11); The hydraulic separator (2) comprises a column (21), the bottom of the column (21) is connected to a cone (22) via a flange, the bottom of the cone (22) is connected to a sand discharge pipe (23) via a flange, the top of the column (21) is connected to a top cover (24) via a flange, the top of the top cover (24) is connected to a liquid discharge pipe (25) via bolts, and a sand and liquid inlet pipe (26) is fixedly connected to the outer wall of the column (21); The screening assembly (4) includes a screen plate (41), the top of the screen plate (41) is fixedly connected to a frame (42), the outer surface of the frame (42) is fixedly connected to a connecting rod (43), the interior of the connecting rod (43) is slidably connected to a sleeve rod (44), the outer surface of the sleeve rod (44) is sleeved with a spring (45), the top of the sleeve rod (44) is fixedly connected to a fixed block (46), a shaft sleeve (47) is installed on the lower surface of the screen plate (41), the interior of the shaft sleeve (47) is rotatably connected to a rotating rod (48), the outer surface of the rotating rod (48) is clamped with an eccentric block (49), and one end of the rotating rod (48) is fixedly connected to a second pulley (410).

2. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: The outer surface of the column (21) is connected to a support plate (1) by bolts, the sand and liquid inlet pipe (26) has an angle of 5 degrees with the horizontal plane, and the sand and liquid inlet pipe (26) is tangent to the outer wall of the column (21).

3. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: The inner walls of the column (21), the cone (22) and the sand discharge pipe (23) are fitted with an inner lining (27), the outer surface of the inner lining (27) is provided with a positioning groove (28), and the outer surface of the inner lining (27) is provided with a tangential opening (29).

4. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 3, characterized in that: A positioning strip is fixedly connected to the inner wall of the column (21), and the positioning strip cooperates with the positioning groove (28). The interior of the top cover (24) is connected to a filter cartridge (210) via bolts.

5. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: A guide plate (12) is fixedly connected to the inner wall of the separation box (3), and the guide plate (12) is located below the sand discharge pipe (23).

6. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: The outer surface of the mesh belt (6) is mounted with a plurality of equally spaced grid bars (7) via bolts, and a first synchronous belt (13) is connected between the double pulley (9) and the first pulley (10) for transmission.

7. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: Four straight grooves (14) are formed through the outer surface of the separation box (3), a connecting rod (43) is inserted into the straight groove (14), the bottom end of the sleeve rod (44) is fixedly connected to the limiting block, the top end of the spring (45) contacts the fixed block (46), and the fixed block (46) is fixedly connected to the outer wall of the separation box (3).

8. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: Two shaft sleeves (47) are installed on the lower surface of the screen plate (41), and a rotating rod (48) is rotatably connected between the two shaft sleeves (47). A second synchronous belt (15) is transmission-connected between the second pulley (410) and the double pulley (9).

9. The oilfield hydraulic sandblasting perforation flowback sand and liquid separation and circulation equipment according to claim 1, characterized in that: An overflow pipe (16) is fixedly connected to one side of the separation box (3).

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