Raw material mixing equipment for polymer drilling fluid production

Abstract

The utility model relates to the field of mixing equipment, in particular to raw material mixing equipment for polymer drilling fluid production, which comprises a mixing tank, an end cover arranged at the upper end of the mixing tank, a discharge valve arranged at the lower end of the mixing tank, a driving pipe rotationally arranged on the end cover, and a driving motor arranged above the end cover and connected with the driving pipe. A plurality of transverse pipes connected with the driving pipe are arranged in the mixing tank, stirring assemblies are arranged on the side faces of the transverse pipes, piston rods are inserted into the ends of the transverse pipes, piston cavities are formed in the transverse pipes, pistons connected with the piston rods are arranged in the piston cavities, the piston rods are sleeved with compression springs connected with the pistons, and scraping plates are connected with the ends of the piston rods. An air supply box sleeving the outer side of the driving pipe is arranged at the upper end of the end cover, an air inlet window is formed in the driving pipe in the air supply box, the air supply box is provided with an air supply pipe, and the air supply pipe is connected with a deflation valve and an air supply device. The mixing tank has the function of conveniently scraping raw materials on the inner wall of the mixing tank, and has the advantage of thorough blanking.

Description

Technical Field

[0001] The utility model relates to the field of mixing equipment, in particular to a raw material mixing equipment for polymer drilling fluid production. Background Art

[0002] Polymer drilling fluid is a type of drilling fluid. Polymer drilling fluid has the advantages of good rheology, strong ability to stabilize the wellbore, prevention of well leakage, fast drilling, low cost, and little damage to oil and gas layers. During the production process of polymer drilling fluid, multiple groups of raw materials need to be mixed. Mixing refers to the process of mixing two or more different substances together to obtain a new mixture. During the mixing process of polymer drilling fluid raw materials, it is easy for raw materials to adhere to the inner wall of the mixing equipment, resulting in difficult feeding. Therefore, it is particularly necessary to develop a raw material mixing equipment for polymer drilling fluid production that can scrape the drilling fluid raw materials adhering to the inner wall of the mixing equipment after mixing. Summary of the Invention

[0003] The purpose of the utility model is to provide a raw material mixing equipment for polymer drilling fluid production, which has the function of scraping the drilling fluid raw materials adhering to the inner wall of the mixing equipment after mixing.

[0004] The adopted technical solution is as follows:

[0005] A raw material mixing equipment for polymer drilling fluid production includes a mixing tank. A end cover is arranged at the upper end of the mixing tank, and a discharge valve is arranged at the lower end of the mixing tank. A driving pipe is rotatably arranged on the end cover, and a driving motor connected to the driving pipe is arranged above the end cover. A plurality of horizontal pipes connected to the driving pipe are arranged in the mixing tank. Stirring components are arranged on the side surfaces of the horizontal pipes. A piston rod is inserted at the end of the horizontal pipe. A piston cavity is formed in the horizontal pipe, and a piston connected to the piston rod is arranged in the piston cavity. A compression spring connected to the piston is sleeved on the piston rod. A scraper is connected to the end of the piston rod. An air supply tank sleeved outside the driving pipe is arranged at the upper end of the end cover. Air intake windows are formed in the driving pipe in the air supply tank. The air supply tank is provided with an air supply pipe, and the air supply pipe is connected with a deflation valve and an air supply device.

[0006] Preferably, the stirring component includes an internal gear ring. The internal gear ring is arranged on the lower end surface of the end cover. A vertical shaft is rotatably arranged on the horizontal pipe. A plurality of groups of stirring blades are arranged on the side surface of the vertical shaft. A gear is arranged at the upper end of the vertical shaft, and the gear meshes with the internal gear ring.

[0007] Preferably, a feed funnel is arranged on the end cover.

[0008] Preferably, a rubber layer is arranged on the outer side of the scraper.

[0009] Preferably, a dust-proof ring is arranged at the lower end of the internal gear ring.

[0010] Compared with the prior art, the beneficial effects are as follows:

[0011] The utility model uses a gas supply device to supply air to a gas supply tank, which enters each piston cavity through a drive pipe and each horizontal pipe, thereby pushing the piston to move outward, making the scraper contact the inner wall of the mixing tank, and then scraping off the raw materials adhering to the inner wall of the mixing tank through the rotation of the scraper. After the scraping is completed, the gas is released through a gas release valve, and under the action of a compression spring, the piston pulls the scraper back to its original position. The utility model has the function of facilitating the scraping of raw materials on the inner wall of the mixing tank. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a raw material mixing device for polymer drilling fluid production according to the utility model,

[0013] Figure 2 is Figure 1 a schematic structural diagram of the position A in

[0014] Figure 3 is Figure 1 a schematic structural diagram of the position B in

[0015] Figure 4 is a schematic structural diagram of the scraping state of a raw material mixing device for polymer drilling fluid production according to the utility model,

[0016] In the figure: 1, mixing tank; 2, end cover; 3, feeding funnel; 4, discharge valve; 5, drive pipe; 6, drive motor; 7, internal gear ring; 8, vertical shaft; 9, stirring blade; 10, gear; 11, dust-proof ring; 12, piston cavity; 13, piston rod; 14, piston; 15, compression spring; 16, scraper; 17, gas supply tank; 18, air inlet window; 19, gas supply pipe; 20, gas release valve; 21, gas supply device; 22, horizontal pipe. Detailed Embodiments

[0017] The following further describes the utility model with reference to specific embodiments, as Figures 1 to 4 shown:

[0018] Embodiment 1: A raw material mixing device for polymer drilling fluid production includes a mixing tank 1, an end cover 2 is arranged at the upper end of the mixing tank 1, the end cover 2 is fixedly connected to the mixing tank 1 by bolts, a discharge valve 4 is arranged at the lower end of the mixing tank 1, and the discharge valve 4 is used to discharge the mixed polymer drilling fluid raw materials. A drive pipe 5 is rotatably arranged on the end cover 2, and a drive motor 6 connected to the drive pipe 5 is arranged above the end cover 2, and the drive motor 6 drives the drive pipe 5 to rotate.

[0019] A plurality of transverse pipes 22 connected to the drive pipe 5 are arranged in the mixing tank 1. The interiors of the transverse pipes 22 and the drive pipe 5 are both communicated. A stirring assembly is arranged on the side of the transverse pipe 22. As the drive pipe 5 rotates, the stirring assembly mixes the polymer drilling fluid raw materials inside the mixing tank 1.

[0020] A piston rod 13 is inserted into the end of the transverse pipe 22. A piston chamber 12 is formed in the transverse pipe 22. A piston 14 connected to the piston rod 13 is arranged in the piston chamber 12. A compression spring 15 connected to the piston 14 is sleeved on the piston rod 13. The piston rod 13 extends to the outside of the transverse pipe 22. A scraping plate 16 is connected to the end of the piston rod 13. When the piston rod 13 moves, the scraping plate 16 is driven to move, changing the distance between the scraping plate 16 and the inner wall of the mixing tank 1. An air supply tank 17 sleeved on the outside of the drive pipe 5 is arranged at the upper end of the end cover 2. An air inlet window 18 is formed in the drive pipe 5 inside the air supply tank 17. The air supply tank 17 is provided with an air supply pipe 19. The air supply pipe 19 is connected to an air release valve 20 and an air supply device 21.

[0021] The air supply device 21 supplies air to the air supply tank 17. The air passes through the drive pipe 5 and each transverse pipe 22 and enters each piston chamber 12, thereby pushing the piston 14 to move outward, making the scraping plate 16 contact the inner wall of the mixing tank 1. Thus, the raw materials adhering to the inner wall of the mixing tank 1 are scraped off by the rotation of the scraping plate 16. After the scraping is completed, the gas is released through the air release valve 20. Under the action of the compression spring 15, the piston 14 pulls the scraping plate 16 back to its original position.

[0022] Embodiment 2: A raw material mixing device for producing polymer drilling fluid, including a mixing tank 1. An end cover 2 is arranged at the upper end of the mixing tank 1. The end cover 2 is fixedly connected to the mixing tank 1 by bolts. The end cover 2 is provided with a feeding funnel 3. A discharge valve 4 is arranged at the lower end of the mixing tank 1. The discharge valve 4 is used to discharge the mixed polymer drilling fluid raw materials. A drive pipe 5 is rotatably arranged on the end cover 2. A drive motor 6 connected to the drive pipe 5 is arranged above the end cover 2. The drive motor 6 drives the drive pipe 5 to rotate.

[0023] A plurality of transverse pipes 22 connected to the drive pipe 5 are arranged in the mixing tank 1. The interiors of the transverse pipes 22 and the drive pipe 5 are both communicated. A stirring assembly is arranged on the side of the transverse pipe 22. As the drive pipe 5 rotates, the stirring assembly mixes the polymer drilling fluid raw materials inside the mixing tank 1. The stirring assembly includes an internal gear ring 7. The internal gear ring 7 is arranged on the lower end face of the end cover 2. A vertical shaft 8 is rotatably arranged on the transverse pipe 22. A plurality of groups of stirring blades 9 are arranged on the side of the vertical shaft 8. A gear 10 is arranged at the upper end of the vertical shaft 8. The gear 10 meshes with the internal gear ring 7. A dust-proof ring 11 is arranged at the lower end of the internal gear ring 7. The dust-proof ring 11 reduces the influence of internal dust on the meshing of the gear 10 and the internal gear ring 7.

[0024] The end of the horizontal pipe 22 is inserted with a piston rod 13. A piston cavity 12 is formed in the horizontal pipe 22. A piston 14 connected to the piston rod 13 is arranged in the piston cavity 12. A compression spring 15 connected to the piston 14 is sleeved on the piston rod 13. The piston rod 13 extends to the outside of the horizontal pipe 22. The end of the piston rod 13 is connected with a scraper 16. A rubber layer is arranged on the outer side of the scraper 16. The piston rod 13 moves to drive the scraper 16 to move, changing the distance between the scraper 16 and the inner wall of the mixing tank 1. An air supply tank 17 sleeved on the outside of the driving pipe 5 is arranged at the upper end of the end cover 2. An air inlet window 18 is formed in the driving pipe 5 in the air supply tank 17. The air supply tank 17 is provided with an air supply pipe 19. The air supply pipe 19 is connected with a gas release valve 20 and an air supply device 21.

[0025] The specific working process is as follows: When mixing the raw materials of the polymer drilling fluid, close the discharge valve, start the driving motor 6, put various raw materials into the mixing tank 1 from the feeding funnel 3, make each vertical shaft 8 rotate through the meshing of the gear 10 and the internal gear ring 7, and use the stirring blades 9 to mix the raw materials of the polymer drilling fluid. After mixing is completed, open the discharge valve for discharging materials. At the same time, use the air supply device 21 to supply air to the air supply tank 17, which enters each piston cavity 12 through the driving pipe 5 and each horizontal pipe 22, so as to push the piston 14 to move outward, making the scraper 16 contact with the inner wall of the mixing tank 1, and thus scraping off the raw materials adhering to the inner wall of the mixing tank 1 through the rotation of the scraper 16. After scraping is completed, release the gas through the gas release valve 20. Under the action of the compression spring 15, the piston 14 pulls the scraper 16 back to its original position, and can scrape the drilling fluid raw materials adhering to the inner wall of the mixing equipment after mixing.

[0026] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the protection scope required by the present invention.

Claims

1. A raw material mixing equipment for polymer drilling fluid production, characterized in that: It includes a mixing tank, which is provided with an end cover at the upper end of the mixing tank, a discharge valve at the lower end of the mixing tank, a driving tube rotatably provided on the end cover, a driving motor connected to the driving tube is provided above the end cover, a plurality of transverse tubes connected to the driving tube are provided in the mixing tank, a stirring assembly is provided on the side of the transverse tube, a piston rod is inserted into the end of the transverse tube, a piston cavity is provided in the transverse tube, a piston connected to the piston rod is provided in the piston cavity, a compression spring connected to the piston is sleeved on the piston rod, a scraper is connected to the end of the piston rod, an air supply box sleeved on the outside of the driving tube is provided on the upper end of the end cover, an air inlet window is provided on the driving tube in the air supply box, an air supply pipe is provided in the air supply box, and the air supply pipe is connected to an air release valve and an air supply device.

2. A raw material mixing equipment for polymer drilling fluid production as claimed in claim 1, characterized in that: The stirring assembly comprises an inner gear ring, which is provided with a lower end surface of an end cover, a vertical shaft rotatably provided on the horizontal tube, a plurality of stirring blades are provided on the side of the vertical shaft, and a gear is provided on the upper end of the vertical shaft, which meshes with the inner gear ring.

3. The raw material mixing equipment for polymer drilling fluid production according to claim 1, characterized in that: The end cover is provided with a feeding funnel.

4. The raw material mixing equipment for polymer drilling fluid production according to claim 1, characterized in that: The outer side of the scraper is provided with a rubber layer.

5. A raw material mixing equipment for polymer drilling fluid production as claimed in claim 2, characterized in that: The lower end of the inner gear ring is provided with a dustproof ring.

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