Independent double-negative-pressure shale shaker

Patent metadata

Field	Value
Publication number	US-12427452-B2
Application number	US-202217887804-A
Country	US
Kind code	B2
Filing date	Aug 15, 2022
Priority date	Oct 22, 2021
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Disclosed is an independent double-negative-pressure shale shaker, and belongs to the technical field of petroleum drilling solid control. The independent double-negative-pressure shale shaker comprises a base, a fluid discharge device, an inclination angle adjustment mechanism, a screening device, an exciting motor and a double-negative-pressure system, wherein the double-negative-pressure system comprises a first negative-pressure system and a second negative-pressure system which are relatively independent; the first negative-pressure system dries drilling fluid of a first screen mesh set close to a material outlet, and the second negative-pressure system increases the treatment capacity of drilling fluid of a second screen mesh set close to the first screen mesh set; and meanwhile, in the deep well section, the second negative-pressure system can be switched to a fluid mist suction state, fluid mist on the screen surface is reduced, the safety is improved, and the pollution of fluid mist is reduced.

First claim

What is claimed is:

1. An independent double-negative-pressure shale shaker, comprising a base ( 10 ), a fluid discharge device ( 20 ), an inclination angle adjustment mechanism ( 30 ), a screening device ( 40 ), an exciting motor ( 50 ) and a double-negative-pressure system ( 60 ), wherein the fluid discharge device ( 20 ) and the inclination angle adjustment mechanism ( 30 ) are arranged on the base ( 10 ), the screening device ( 40 ) is arranged on the inclination angle adjustment mechanism ( 30 ), the exciting motor ( 50 ) is arranged on the screening device ( 40 ), and the double-negative-pressure system ( 60 ) is arranged on the base ( 10 );
the screening device ( 40 ) comprises a housing ( 41 ), and a first screen mesh set and a second screen mesh set which are arranged in the housing ( 41 ) and are sequentially arranged in a direction from a material outlet to a material inlet; a first vacuum disc ( 42 ) and a second vacuum disc ( 43 ) are respectively arranged at a bottom of the first screen mesh set and a bottom of the second screen mesh set, and bottom of the first vacuum disc ( 42 ) and a bottom of the second vacuum disc ( 43 ) communicate with the fluid discharge device ( 20 );
the double-negative-pressure system ( 60 ) comprises a support ( 61 ) arranged on the base ( 10 ), and a first negative-pressure system ( 601 ), a second negative-pressure system ( 602 ) and a fluid mist separator ( 62 ) which are arranged on the support ( 61 ); the first negative-pressure system ( 601 ) communicates with the fluid mist separator ( 62 ) and the first vacuum disc ( 42 ); the second negative-pressure system ( 602 ) communicates with the fluid mist separator ( 62 ) and the second vacuum disc ( 43 ); and
the second negative-pressure system ( 602 ) further communicates with a position of a top of the housing ( 41 ) corresponding to the second screen mesh set through a fluid mist hose ( 63 ), and an on-off valve ( 64 ) is arranged on the fluid mist hose ( 63 ).

2. The independent double-negative-pressure shale shaker according to claim 1 , wherein the first negative-pressure system ( 601 ) and the second negative-pressure system ( 602 ) are structurally consistent, and each comprise an exhaust fan ( 65 ), a bent pipe ( 66 ), a connecting pipe ( 67 ) and a vacuum hose ( 68 ) which are sequentially connected; an air inlet and an air outlet of the exhaust fan ( 65 ) communicate with the bent pipe ( 66 ) and the fluid mist separator ( 62 ) respectively, and the vacuum hose ( 68 ) communicates with the corresponding vacuum disc; and the fluid mist hose ( 63 ) communicates with the connecting pipe ( 67 ) of the second negative-pressure system ( 602 ).

3. The independent double-negative-pressure shale shaker according to claim 2 , wherein two ends of the connecting pipe ( 67 ) respectively communicate with two sides of the corresponding vacuum disc through the vacuum hose ( 68 ), a top side of a middle of the connecting pipe ( 67 ) communicates with the bent pipe ( 66 ), and a bottom side of the middle of the connecting pipe ( 67 ) of the second negative-pressure system ( 602 ) communicates with the fluid mist hose ( 63 ).

4. The independent double-negative-pressure shale shaker according to claim 1 , wherein an outer side of the housing ( 41 ) is vertically provided with rectangular steel ( 411 ) corresponding to the first screen mesh set and the second screen mesh set, the rectangular steel ( 411 ) and the housing ( 41 ) form a gas channel, a bottom end of the gas channel communicates with the corresponding vacuum disc, and a top end of the gas channel communicates with the corresponding negative-pressure system through an air exhaust joint ( 412 ).

5. The independent double-negative-pressure shale shaker according to claim 1 , wherein the first screen mesh set and the second screen mesh set each comprise at least one screen mesh assembly, the bottom of the first vacuum disc ( 42 ) and the bottom of the second vacuum disc ( 43 ) each communicate with the fluid discharge device ( 20 ) through a fluid discharge joint ( 44 ) and a fluid discharge hose ( 45 ), and the number of the fluid discharge joint ( 44 ) on each vacuum disc is consistent with that of the corresponding screen mesh assembly.

6. The independent double-negative-pressure shale shaker according to claim 5 , wherein the fluid discharge device ( 20 ) comprises a case ( 21 ); the case ( 21 ) is at one side thereof provided with a fluid inlet ( 211 ) communicating with the fluid discharge hose ( 45 ), and at the opposite side thereof is provided with a rectangular fluid outlet ( 212 ); a limiting part ( 213 ) is arranged on an outer side of the fluid outlet ( 212 ), a wedge-shaped space is formed between the limiting part ( 213 ) and the case ( 21 ), a wedge-shaped part ( 214 ) is fitted within the wedge-shaped space, a fluid discharge slot ( 215 ) is formed between a bottom of the wedge-shaped part ( 214 ) and a bottom of the fluid outlet ( 212 ), the fluid discharge slot ( 215 ) is lower than a bottom of the fluid inlet ( 211 ) in height, and a top of the wedge-shaped part ( 214 ) is lower than a top of the fluid outlet ( 212 ) and higher than a top of the fluid inlet ( 211 ).

7. The independent double-negative-pressure shale shaker according to claim 6 , wherein a sectional area of the fluid discharge slot ( 215 ) is smaller than that of the fluid inlet ( 211 ).

8. The independent double-negative-pressure shale shaker according to claim 6 , wherein the fluid discharge device ( 20 ) further comprises a mounting frame ( 22 ) connected with the case ( 21 ), the mounting frame ( 22 ) is located on a side of the case ( 21 ) provided with the fluid outlet ( 212 ), a screw ( 221 ) is spirally and vertically arranged on the mounting frame ( 22 ), a bottom end of the screw ( 221 ) is rotatably fitted with the wedge-shaped part ( 214 ), and a hand wheel ( 222 ) is arranged at a top end of the screw ( 221 ).

9. The independent double-negative-pressure shale shaker according to claim 8 , wherein the mounting frame ( 22 ) is a part of the base ( 10 ), and meanwhile, the mounting frame ( 22 ) forms the side of the case ( 21 ) provided with the fluid outlet ( 212 ).

10. The independent double-negative-pressure shale shaker according to claim 1 , wherein a protective cover supporting frame ( 31 ) is arranged on the inclination angle adjustment mechanism ( 30 ), and an inlet protective cover ( 32 ), a middle protective cover ( 33 ) and an outlet protective cover ( 34 ) are arranged on the protective cover supporting frame ( 31 ).

11. The independent double-negative-pressure shale shaker according to claim 2 , wherein a protective cover supporting frame ( 31 ) is arranged on the inclination angle adjustment mechanism ( 30 ), and an inlet protective cover ( 32 ), a middle protective cover ( 33 ) and an outlet protective cover ( 34 ) are arranged on the protective cover supporting frame ( 31 ).

12. The independent double-negative-pressure shale shaker according to claim 3 , wherein a protective cover supporting frame ( 31 ) is arranged on the inclination angle adjustment mechanism ( 30 ), and an inlet protective cover ( 32 ), a middle protective cover ( 33 ) and an outlet protective cover ( 34 ) are arranged on the protective cover supporting frame ( 31 ).

13. The independent double-negative-pressure shale shaker according to claim 4 , wherein a protective cover supporting frame ( 31 ) is arranged on the inclination angle adjustment mechanism ( 30 ), and an inlet protective cover ( 32 ), a middle protective cover ( 33 ) and an outlet protective cover ( 34 ) are arranged on the protective cover supporting frame ( 31 ).

14. The

Assignees

• Univ Southwest Petroleum

Inventors

• Hou Yongjun
• Hou Duyu
• Du Mingjun
• Fang Pan
• Wang Yuwen

Classifications

• E21B21/065 Primary

  Separating solids from drilling fluids · CPC title

• B01D2201/204

  Systems for applying vacuum to filters · CPC title

• B01D33/745

  Construction of suction casings, pans, or the like · CPC title

• B01D33/41

  in series connection · CPC title

• B01D33/0183 Primary

  supported · CPC title