Inlet door scalping screen

Patent metadata

Field	Value
Publication number	US-11292031-B2
Application number	US-201916719791-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 18, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A housing inlet for a sifter includes a scalping screen sloped downward in a first direction. The housing inlet also includes a pan positioned at least partially below the scalping screen. The pan is sloped downward in a second direction that is different than the first direction.

First claim

What is claimed is:

1. A housing inlet for a sifter, comprising: a scalping screen sloped downward in a first direction; a pan positioned at least partially below the scalping screen, wherein the pan is sloped downward in a second direction that is different than the first direction; a scalping outlet; and a splitter configured to receive a material and split the material into substantially equal portions to distribute one of the portion to the scalping screen.

2. The housing inlet of claim 1 , wherein the first direction is substantially perpendicular to the second direction.

3. The housing inlet of claim 1 , wherein the first direction is opposite to the second direction.

4. The housing inlet of claim 1 , wherein the first direction is oriented at an angle from about 95° to about 175° with respect to the second direction.

5. The housing inlet of claim 1 , wherein the scalping screen is sloped downward at a first angle with respect to a horizontal plane, wherein the pan is sloped downward at a second angle with respect to the horizontal plane, and wherein the first angle that is less than the second angle.

6. The housing inlet of claim 5 , wherein the first angle is from about 1° to about 3°, and wherein the second angle is from about 4° to about 10°.

7. The housing inlet of claim 1 , wherein the scalping screen is configured to receive the one of the portions of the material, wherein a first amount of the material that is too large to pass through the scalping screen flows down the scalping screen in the first direction to the scalping outlet, and wherein a second amount of the material passes through the scalping screen onto the pan.

8. The housing inlet of claim 1 , further comprising:
a second scalping screen positioned at least partially below the pan, wherein the scalping screen and the second scalping screen are configured to operate in parallel; and
a second pan positioned at least partially below the second scalping screen, wherein the pan and the second pan are configured to operate in parallel.

9. A gyratory sifter, comprising:
an upper deck comprising:
an upper scalping screen sloped downward in a first direction;
an upper pan positioned at least partially below the upper scalping screen, wherein the upper pan is sloped downward in a second direction that is different than the first direction;
a first upper screen positioned downstream from the upper pan, wherein openings in the upper pan are larger than openings in the first upper screen;
a scalping outlet, wherein the upper scalping screen is configured to receive a material, wherein a first portion of the material that is too large to pass through the upper scalping screen flows down the upper scalping screen in the first direction to the scalping outlet, and wherein a second portion of the material passes through the upper scalping screen onto the upper pan, wherein the upper pan comprises a spreader that is configured to spread the second portion of the material substantially evenly across a width of the first upper screen; and
a first lower screen positioned at least partially below the first upper screen, wherein the openings in the first upper screen are larger than openings in the first lower screen;

a lower deck positioned at least partially below the upper deck, wherein the lower deck comprises:
a lower scalping screen sloped downward in the first direction;
a lower pan positioned at least partially below the lower scalping screen, wherein the lower pan is sloped downward in the second direction;
a second upper screen positioned downstream from the lower pan; and
a second lower screen positioned at least partially below the second upper screen; and

a motion generator configured to cause the upper deck and the lower deck to move.

10. The gyratory sifter of claim 9 , wherein the first direction is substantially perpendicular to the second direction, opposite to the second direction, or a combination thereof.

11. The gyratory sifter of claim 10 , wherein the upper scalping screen is sloped downward at a first angle from about 1° to about 3° with respect to a horizontal plane, and wherein the upper pan is sloped downward at a second angle from about 4° to about 10° with respect to the horizontal plane.

12. A method for sifting a material, comprising:
receiving the material via a housing inlet of a vibratory sifter;
causing at least a portion of the vibratory sifter to move;
splitting the material received via the housing inlet into substantially equal portions using a splitter;
distributing one of the portions of the material to a deck of the vibratory sifter;
sifting the material using a scalping screen of the deck, wherein the scalping screen is sloped downward in a first direction, wherein a first portion of the material that is too large to pass through the scalping screen flows down the scalping screen in the first direction to a scalping outlet, wherein a second portion of the material passes through the scalping screen onto a pan of the deck, wherein the pan is sloped downward in a second direction that is different from the first direction, and wherein the second direction is toward an upper screen of the deck; and
sifting the second portion of the material using the upper screen.

13. The method of claim 12 , wherein the first direction is substantially perpendicular to the second direction, opposite to the second direction, or a combination thereof.

14. The method of claim 13 , wherein the scalping screen is sloped downward at a first angle from about 1° to about 3° with respect to a horizontal plane, and wherein the pan is sloped downward at a second angle from about 4° to about 10° with respect to the horizontal plane.

15. The method of claim 14 , further comprising spreading the second portion of the material substantially evenly across a width of the upper screen using a spreader that is coupled to or integral with the pan.

16. The housing inlet of claim 7 , wherein the housing inlet defines a door, and wherein the first amount of the material flows from the scalping screen, through the door, and into the scalping outlet.

Assignees

• Mi Llc
• Schlumberger Technology Corp

Inventors

• Mayer Marc
• Meranda Christopher

Classifications

• B07B1/40 Primary

  Resonant vibration screens · CPC title

• B07B2201/04

  Multiple deck screening devices comprising one or more superimposed screens · CPC title

• B07B1/36 Primary

  jigging or moving to-and-fro in more than one direction · CPC title