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CN-121990313-A - Sand adding device for wet sand for fracturing

CN121990313ACN 121990313 ACN121990313 ACN 121990313ACN-121990313-A

Abstract

The application relates to a sand adding device for wet sand for fracturing, which comprises a sand collecting bin, a conveying system, a sand storage bin and a sand storage bin, wherein the sand collecting bin comprises a first bin body, a discharging platform and a first conveying device, the discharging platform is connected with the first bin body, the conveying system comprises a second conveying device and a third conveying device, the second conveying device and the third conveying device are perpendicular to a horizontal plane, the third conveying device is higher than the second conveying device, the second conveying device is connected with a first discharging hole of the first bin body, the third conveying device is connected with a second conveying device, the sand storage bin comprises a second bin body and a fourth conveying device, the second bin body is connected with the third conveying device, the fourth conveying device is arranged at a second discharging hole of the second bin body, and a first air cannon and a second air cannon are respectively arranged at the bottoms close to the first bin body and the second bin body. The sand adding device can effectively treat wet sand with the water content of up to 15 percent.

Inventors

  • XIONG FAN
  • LI LEI

Assignees

  • 重庆长江造型材料（集团）股份有限公司
  • 四川华盛新材料有限公司

Dates

Publication Date
20260508
Application Date
20251210

Claims (10)

  1. 1. A sand feeding device for wet sand for fracturing, comprising: The sand collecting bin comprises a first bin body, a discharging platform connected with the first bin body and a first transmission device, wherein the first transmission device is arranged at the bottom of the first bin body in parallel to a horizontal plane; The conveying system comprises a second conveying device and a third conveying device, the second conveying device and the third conveying device are arranged perpendicular to the horizontal plane, the third conveying device is higher than the second conveying device, the second conveying device is connected with the first discharging hole of the first bin body, and the third conveying device is connected with the second conveying device; The sand storage bin comprises a second bin body and a fourth transmission device, wherein the second bin body is connected with the third transmission device, and the fourth transmission device is arranged at a second discharge hole of the second bin body; Wherein, be close to the bottom of the first storehouse body and the second storehouse body and be provided with first air big gun and second air big gun respectively, the export of first air big gun and second air big gun is towards the bottom of the first storehouse body and the second storehouse body to input compressed air in the first storehouse body and the second storehouse body.
  2. 2. The sand adding device according to claim 1, wherein the first conveying device, the second conveying device, the third conveying device and the fourth conveying device are screw conveyors, each screw conveyor comprises a pipe body and a screw column arranged in the pipe body, a plurality of rotating blades are arranged on the screw column, the diameter of the pipe body is 300-600 mm, and the inclination angle of each rotating blade is 5-45 degrees.
  3. 3. The sanding apparatus of claim 2, wherein the surface of the rotating blades is coated with a tungsten carbide wear layer.
  4. 4. The sand feeder of claim 2, wherein the screw conveyor comprises a drive device, wherein the drive device is a variable frequency motor, the power of the variable frequency motor is 15-75kw, and the rotation speed of the variable frequency motor is 80-350 rmp.
  5. 5. The sand adding device of claim 2, wherein a sealing layer is arranged between the pipe body and the spiral column, and a diversion trench is arranged between the pipe body and the sealing layer and used for guiding moisture of the pipe body to outside the pipe body.
  6. 6. The sand adding device of claim 1, wherein the inner wall of the second bin body is provided with a high-molecular wear-resistant lining plate, and the surface of the lining plate is provided with micro-raised turbulence lines.
  7. 7. The sanding apparatus of claim 1, further comprising a controller for controlling the first, second, third, fourth, first and second air cannons.
  8. 8. The sand feeding apparatus according to claim 7, further comprising one or more humidity sensors provided to the first and/or second chambers for collecting humidity parameters of the wet sand and uploading the collected parameters to the controller.
  9. 9. The sand adding device according to claim 7, further comprising a material level detecting device which is arranged in the second bin body and is used for detecting the amount of wet sand in the second bin body, and uploading the detection result to the controller.
  10. 10. The sand adding device according to claim 7, further comprising a discharge detecting device, which is disposed at the second discharge port and is used for detecting a discharge state, and uploading the detection result to the controller.

Description

Sand adding device for wet sand for fracturing Technical Field The invention relates to the field of petroleum and natural gas exploitation equipment, in particular to a sand adding device for wet sand for fracturing. Background At present, the unconventional oil and gas reservoir resources occupy more reserves and have rich resource potential, but a large amount of resources cannot be utilized due to higher exploitation difficulty, and the exploration and development of the unconventional oil and gas reservoir are urgent as the demand of petroleum resources is continuously expanded. In the fracturing construction process of unconventional oil and gas exploitation, the sand adding device is a key component of a fracturing equipment system, and the performance of the sand adding device directly influences the fracturing effect and the exploitation efficiency. The existing sand adding device is easy to cause sand adhesion and arching when a conveyor conveys wet sand with the water content exceeding 5%, so that the conveying is interrupted, a gravity feeding mode is obviously influenced by humidity change of the sand, uniformity of sand-liquid mixing is difficult to ensure, clay minerals in the wet sand can aggravate abrasion of conveying parts, the service life of equipment is shortened, residual wet sand is difficult to clean after the inside of the equipment is hardened, and the subsequent operation quality is influenced. Therefore, development of a novel device capable of directly treating high-humidity fracturing sand and ensuring continuous and stable sand feeding is needed. Disclosure of Invention Aiming at the technical problems existing in the prior art, the invention provides a sand adding device for wet sand for fracturing, which comprises a sand collecting bin, a conveying system and an air cannon, wherein the sand collecting bin comprises a first bin body, a discharging platform connected with the first bin body and a first conveying device, the first conveying device is parallel to a horizontal plane and is arranged at the bottom of the first bin body, the first bin body comprises an opening, a discharging vehicle is used for pouring the wet sand into the opening of the first bin body through the discharging platform and conveys the wet sand to the outside of a first discharge hole of the first bin body through the first conveying device, the conveying system comprises a second conveying device and a third conveying device, the second conveying device and the third conveying device are arranged perpendicular to the horizontal plane, the height of the third conveying device is higher than that of the second conveying device, the second conveying device is connected with the first discharge hole of the first bin body, the third conveying device is connected with the second conveying device, the sand storing bin comprises a second bin body and a fourth conveying device, the second bin body is connected with the third conveying device, the fourth conveying device is arranged at the second bin body, the second bin body is close to the second discharge hole of the second bin body and the bottom of the first air cannon and the bottom of the second bin body are arranged in the second bin body and the first air cannon and the bottom of the second bin body. The sand adding device comprises a first conveying device, a second conveying device, a third conveying device and a fourth conveying device, wherein the first conveying device, the second conveying device, the third conveying device and the fourth conveying device are screw conveyors, each screw conveyor comprises a pipe body and a screw column arranged in the pipe body, a plurality of rotating blades are arranged on the screw column, the diameter of the pipe body is 300-600 mm, and the inclination angle of each rotating blade is 5-45 degrees. The sanding device as described above wherein the surface of the rotating blades is coated with a tungsten carbide wear layer. The sand feeding device comprises a driving device, wherein the driving device is a variable frequency motor, the power of the variable frequency motor is 15-75kw, and the rotating speed of 80-350rpm is provided. The sand adding device comprises a sealing layer between the pipe body and the spiral column, and a diversion trench is arranged between the pipe body and the sealing layer and used for guiding water of the pipe body to the outside of the pipe body. The sand adding device is characterized in that the inner wall of the second bin body is provided with the high-molecular wear-resistant lining plate, and the surface of the lining plate is provided with the micro-convex turbulence lines. The sand feeding device as described above, further comprising a controller for controlling the first transmission device, the second transmission device, the third transmission device, the fourth transmission device, the first air cannon and the second air cannon. The sand adding device further comp