A device for preparing film-coated proppant and its working method

A technology of proppant and film covering, applied in the field of hydraulic fracturing, which can solve the problems of insufficient strength of the surface covering film, limit the wide use of film covering proppant, and high price, achieve rapid heating and cooling, ensure safety and reliability, and guarantee The effect of uniformity

Active Publication Date: 2020-08-07
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently problems that the price of coated proppants is higher than that of ceramsite, and the strength of the surface coating is not enough, which limits the wide use of coated proppants

Method used

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  • A device for preparing film-coated proppant and its working method
  • A device for preparing film-coated proppant and its working method
  • A device for preparing film-coated proppant and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like Figure 1-5 As shown, a device for preparing film-coated proppants includes a lifting and sliding mechanism 1, a reaction kettle 2 and a control box 3. The lifting and sliding mechanism 1 includes a support frame 1-1 and a slider 1 that slides up and down along the support frame 1-1 -2, the reaction kettle 2 includes a kettle body 2-1 and a kettle cover 2-2, the kettle body 2-1 is connected to the support frame 1-1, and the kettle cover 2-2 is connected to the slider 1-2;

[0050] The kettle body 2-1 is equipped with a heating device and a stirring device, and the kettle body 2-1 is provided with an air inlet, an air outlet and a spraying port, and the spraying port is connected to a spray-type dosing system;

[0051] A controller is arranged in the control box 3, and the heating device, the stirring device and the spraying type dosing system are all connected to the controller.

Embodiment 2

[0053] A device for preparing a film-coated proppant, the structure of which is shown in Example 1, the difference is that the kettle body 2-1 includes an inner layer and an outer layer, and the heating device is a heating ring located between the inner layer and the outer layer, Under 220V, its heating power is 2700W, which is used for temperature control in the kettle body 2-1, and the heating coil is connected to the controller; the inner and outer layers are made of metal; there is also a temperature control device between the inner and outer layers. The sensor and the temperature controller are connected with the controller. The model of the temperature sensor can be flexibly selected according to the existing model. The working temperature in the kettle body is adjustable from 20 to 200 degrees Celsius, and the optimum temperature can be set to achieve the set optimum temperature. The controller can control the electric heating coil to stop heating and turn to the heat pr...

Embodiment 3

[0055] A device for preparing film-coated proppants, as shown in Example 2, the difference is that the stirring device includes a planet carrier, a sun gear, a first ring gear and a second ring gear, a first stirring shaft and a second stirring shaft , the planetary frame is set on the kettle cover 2-2, the first ring gear is connected to the first stirring shaft, the second ring gear is connected to the second stirring shaft, and multiple sets of stirring shafts are connected to the first stirring shaft and the second stirring shaft The paddle, the paddle of the stirring paddle is oblique to the stirring shaft, that is, it is inclined at a certain angle, such as figure 2 As shown, there are 2 blades;

[0056] The planet carrier is fixed, and a motor with adjustable speed is arranged on the sun gear or the ring gear. When the stirring device is working, the first stirring shaft and the second stirring shaft are respectively connected to the first ring gear and the second rin...

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Abstract

The invention relates to a device for preparing a lamination propping agent and a preparation method thereof and belongs to the field of hydraulic fracturing. The device comprises a hoisting sliding mechanism, a reaction kettle and a control box, wherein the hoisting sliding mechanism comprises a supporting frame and a sliding block which slides up and down along the supporting frame; the reactionkettle comprises a kettle body and a kettle cover; the kettle body is connected onto the supporting frame; the kettle cover is connected with the sliding block; the kettle body is internally providedwith a heating device and a stirring device; the kettle body is provided with a gas inlet, a gas outlet and a medicine spraying opening; the medicine spraying opening is connected with a spraying type dosing system; the control box is internally provided with a controller; and the heating device, the stirring device and the spraying type dosing system are connected to the controller. The whole device provided by the invention is a reaction device capable of controlling a plurality of factors; a reagent is added and the spraying type dosing system with adjustable flow is adopted, so that the controllability of a reagent adding speed is realized; and meanwhile, the reaction uniformity of propping agent grains and a reagent in the reaction kettle is also ensured.

Description

technical field [0001] The invention relates to a device for preparing a film-coated proppant and a working method thereof, belonging to the technical field of hydraulic fracturing in the process of oil and natural gas exploitation. Background technique [0002] Hydraulic fracturing is one of the effective measures to improve production and injection in oilfields. Whether it is conventional low-permeability or ultra-low-permeability oil and gas reservoirs, or shale and tight sandstone reservoirs in unconventional oil and gas reservoirs, hydraulic fracturing plays a key role. The stimulation effect, especially in unconventional reservoirs, without the use of fracturing technology, it is difficult to extract oil and gas underground. The hydraulic fracturing process uses a high-pressure pump set to form one or more artificial fractures with a certain geometric size in the formation through the pre-fluid, and then the sand-carrying fluid carries proppant with a certain strength ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00B01J19/18C09K8/80
CPCB01J19/0013B01J19/0066B01J19/18B01J2219/00051C09K8/805
Inventor 牟绍艳贾旭楠房堃吴亚红温庆志
Owner PEKING UNIV
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