Rotary backfilling device for filter material in motorized well

Abstract

The invention relates to a rotary backfilling device for a motor-pumped well filling material. The device comprises a rotatable open gravel-filling cylinder, a rotary connection shaft, four square support tubes, horizontal support arms and rolling bearings. A drilling machine or a diesel engine is used for controlling a rotary device to rotate, blades for evenly distributing the filter material to a gravel-filling container are mounted in a gravel-filling device, the rotary device is arranged at the lower part of the gravel-filling device and moves circumferentially along the upper edge of a well tube, a filter material outlet adopts a strip-shaped arc structure and rotates around the outer wall of the well tube and a well hole by 360 degrees, and the periphery of the well tube is evenly filled with gravel.

Description

technical field [0001] The invention relates to a rotary backfilling device for the filter material of a motor well. Background technique [0002] The mechanical well project is the main building for the development and utilization of groundwater resources. With the development and utilization of groundwater resources, the construction scale of mechanical wells in my country is also increasing. 4 eye; the total groundwater supply in the country is 1107.3×10 8 m 3 , the water supply of the motorized well reaches 847.91×10 8 m 3 , accounting for 77% of the total groundwater supply; in the arid and semi-arid northern regions, the mechanical well project is the main water conservancy facility for farmland irrigation and also the main project for urban and rural water supply. The mechanical well water pumping irrigation has fundamentally changed the agricultural production in northern my country It plays an important role in ensuring food security and promoting the development...

AI Technical Summary

Problems solved by technology

[0003] The purpose of backfilling the filter material is to block or reduce the mud and sand from entering the well, prevent the silt of the pores of the permeable pipe, and at the same time increase the water passing area of ​​the water entering the well, so as to increase the water output of the well, reduce the sand content of the well water and extend the well project. The purpose of service life; filter material backfilling is an important link in the construction of motor-driven wells, which is directly related to the water inflow, water output and service life of the motor-driven well. Evenly fill the gravel to prevent adverse phenomena such as silting and segregation of the filter material, so as to meet the design standards for gravel filling; how to achieve uniform gravel filling, there are no specific measures in the specification, and in the construction practice of motorized well engineering, usually It is to use a shovel as a tool to directly backfill the filter material into the well hole, which often causes uneven gravel filling, which affects the water output of the well, resulting in serious sand inrush in the tube well, insufficient water output, and even tilting and scrapping of the well pipe of the well.

[0004] Chinese patent application publication number CN104420857A, applicant: China National Petroleum Corporation, application publication date: March 18, 2015, the application discloses "a gravel packing method for filling gravel into directional wells to form a gravel layer, It is characterized in that the gravel packing method includes: injecting a first filling slurry with first gravels into the directional well, and the first gravel has a first density; when the first gravel deposited in the directional well When the ratio of the highest height to the diameter of the directional well reaches a predetermined value, the injection of the first filling slurry into the directional well is stopped, and the second filling slurry with the second gravel is injected into the directional well, and the second filling slurry is injected into the directional well. The gravel has a second density, and the second density is less than the first density; a gravel layer for a directional well, wherein the gravel layer includes: first gravel with the first density; The second gravel; the second density is less than the first density"; "The gravel packing method and gravel layer provided by the present invention, by injecting the first gravel and the first gravel with different densities into the directional well The second gravel effectively prolongs the gravel packing length of the directional well”; according to the disclosure of the above patent application, the gravel packing method in this invention only describes the structure of different gravel layers, and does not mention how to uniformly pack gravel and what tools to use for gravel filling

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