Vibratory separator with automatically adjustable beach

• US 7,331,469 B2
• Filed: 04/29/2004
• Issued: 02/19/2008
• Est. Priority Date: 04/29/2004
• Status: Active Grant

• Current Assignee: Varco I/P Incorporated (NOV, Inc.)
• Original Assignee: Varco I/P Incorporated (NOV, Inc.)
• Inventors: Stone, Buddy, Padalino, Norman, Scott, Eric, McClung, Guy L. III, Seyffert, Kenneth W., McDonough, Kevin
• Primary Examiner(s): Mackey; Patrick
• Assistant Examiner(s): Hageman; Mark
• Application Number:
  US10/835,256
• Publication Number:
  US 20050242009A1
• Time in Patent Office: 1,391 Days
• Field of Search: 209/404, 209/413, 209/412, 209/319, 209/405, 209/309
• US Class Current: 209/413
• CPC Class Codes: B01D 33/0376 supported
• CPC Class Codes: B01D 33/37 in parallel connection
• CPC Class Codes: B01D 33/807 by level measuring
• CPC Class Codes: B07B 1/42 Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
• CPC Class Codes: B07B 1/4609 constructional details of screening surfaces or meshes
• CPC Class Codes: B07B 13/18 Control
• CPC Class Codes: B07B 2230/01 Wet separation

Abstract

A vibratory separator having a basket for supporting screen apparatus for treating material, the basket pivotably mounted on a base, vibratory apparatus connected to the basket for vibrating the basket, the material forming a pool on the screen apparatus, and a beach formed on the screen apparatus, measurement apparatus connected to the basket and positioned above the screen apparatus for measuring a distance from the measurement apparatus to a top surface of the pool, control apparatus for controlling and in communication with the measurement apparatus for receiving signals therefrom indicative of said distance, which distance is indicative of pool depth at that location and which correspond to beach extent, and adjustment apparatus controlled by the control apparatus for adjusting angle of the basket, thereby adjusting extent of the beach.

Claims

1. A vibratory separator comprising

a basket for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto,

vibratory apparatus connected to the basket for vibrating the basket,

screen apparatus supported by the basket, the screen apparatus having an exit end, the material flowable onto the screen apparatus to form a pool on the screen apparatus and a beach on the screen apparatus adjacent the pool, material not passing through the screen apparatus flowing off an exit end of the screen apparatus, the beach adjacent the exit end of the screen apparatus, the beach having a rear boundary line on the screen apparatus and a front boundary at or near the exit end of the screen apparatus,

measurement sensor apparatus connected to the vibratory separator and positioned above the screen apparatus for measuring a distance from the measurement sensor apparatus to a top surface of the pool, the measurement sensor apparatus including a signal production portion for producing signals indicative of said distance and for transmitting said signals,

a control system controlling and in communication with the measurement sensor apparatus for receiving signals from the measurement sensor apparatus indicative of said distance and for processing said signals to calculate a pool depth corresponding to said distance, said pool depth related to a location of an edge of said pool adjacent said beach,

angle adjustment apparatus connected to the basket and controlled by the control system for adjusting angle of the basket, thereby adjusting extent of the beach,

the basket pivotably connected by two spaced-apart pivot members to the base beneath said rear boundary line, the basket pivotable at a pivot point beneath the rear boundary line, and

a control system controlling the angle adjustment apparatus to maintain the rear boundary line above a line between the two spaced-apart pivot members and thereby maintain a desired beach extent.

2. The vibratory separator of claim 1 wherein the vibratory separator is a shale shaker and the material is drilling fluid with drilled cuttings therein.

3. The vibratory separator of claim 1

a pool on the screen apparatus,

the control system for controlling extent of the beach so that the pool does not extend beyond the exit end of the screen apparatus.

4. The vibratory separator of claim 1 wherein the screen apparatus comprises a plurality of screens placed adjacent each other in the basket, each screen with an associated screen support connected to the basket.

5. The vibratory separator of claim 1 wherein the angle adjustment apparatus includes a basket support pivotably mounted to the base and moving apparatus for selectively moving the basket up and down.

6. The vibratory separator of claim 5

wherein the basket has a fluid entry end and a fluid exit end and wherein the basket is pivotably mounted adjacent the fluid exit end, and

wherein the angle adjustment apparatus moves the basket'"'"'s fluid entry end.

7. The vibratory separator of claim 6 wherein the moving apparatus includes hydraulic cylinder apparatus for moving the basket.

8. The vibratory separator of claim 7 wherein the hydraulic cylinder apparatus includes two hydraulically powered piston apparatuses, each on a side of the basket for moving the basket.

9. The vibratory separator of claim 8 wherein each hydraulically powered piston apparatus is pivotably interconnected with corresponding linkage apparatus, the linkage apparatus pivotably connected to the basket support adjacent the fluid entry end of the basket.

10. The vibratory separator of claim 1 wherein the measurement sensor apparatus is ultrasonic apparatus.

11. The vibratory separator of claim 10 wherein the ultrasonic apparatus is at least one ultrasonic apparatus.

12. The vibratory separator of claim 1 wherein the measurement sensor apparatus comprises a plurality of distance sensor apparatuses.

13. The vibratory separator of claim 12 wherein said plurality includes a first ultrasonic sensor apparatus spaced-apart from a second ultrasonic sensor apparatus, the first ultrasonic sensor apparatus above one side of the screen apparatus and the second ultrasonic sensor apparatus above an opposite side of the screen apparatus.

14. The vibratory separator of claim 1 wherein the measurement sensor apparatus is from the group consisting of electrical, optical, electromagnetic, ultrasonic, acoustic, and pulse-echo apparatus.

15. The vibratory separator of claim 1 wherein the angle adjustment apparatus is powered by power apparatus from the group consisting of pneumatic power apparatuses, hydraulic power apparatuses and electric power apparatuses.

16. The vibratory separator of claim 1 further comprising

flow sensor apparatus connected to the vibratory separator for sensing the flow of the material onto the screen apparatus,

the flow sensor apparatus controlled by and in communication with the control system,

the control system adjusting basket angle in response to signals from the flow sensor apparatus.

17. A vibratory separator comprising

a basket for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto,

vibratory apparatus connected to the basket for vibrating the basket,

screen apparatus supported by the basket, the material flowable onto the screen apparatus to form a pool on the screen apparatus, a beach formable on the screen apparatus adjacent the pool,

measurement sensor apparatus connected to the vibratory separator and positioned above the screen apparatus for measuring a distance from the measurement sensor apparatus to a top surface of the pool, the measurement sensor apparatus including a signal production portion for producing signals indicative of said distance and for transmitting said signals,

a control system controlling and in communication with the measurement sensor apparatus for receiving signals from the measurement sensor apparatus indicative of said distance and for processing said signals to calculate a pool depth corresponding to said distance,

angle adjustment apparatus connected to the basket and controlled by the control system for adjusting angle of the basket, thereby adjusting extent of the beach, the angle adjustment apparatus including a basket support pivotably mounted to the base and moving apparatus for selectively moving the basket up and down,

the beach having a rear boundary line and the basket pivotably connected to the base beneath said rear boundary line, the control system controlling extent of the beach such that the rear boundary line is maintained in a position above the pivotal connection, and

the basket at an angle such that the beach is formed adjacent an edge of the pool adjacent an exit end of the screen apparatus.

18. A method for treating material introduced to a vibratory separator, the method comprising

introducing material to a vibratory separator, the vibratory separator comprising a basket for supporting screen apparatus for treating material introduced into the vibratory separator, the basket on a base and pivotable with respect thereto, vibratory apparatus connected to the basket for vibrating the basket, screen apparatus supported by the basket, the screen apparatus having an exit end, the material flowable onto the screen apparatus to form a pool on the screen apparatus and a beach on the screen apparatus adjacent the pool, material not passing through the screen apparatus flowing off an exit end of the screen apparatus, the beach adjacent the exit end of the screen apparatus, the beach having a rear boundary line on the screen apparatus and a front boundary at or near the exit end of the screen apparatus, measurement sensor apparatus connected to the vibratory separator and positioned above the screen apparatus for measuring a distance from the measurement sensor apparatus to a top surface of the pool, the measurement sensor apparatus including a signal production portion for producing signals indicative of said distance and for transmitting said signals, a control system controlling and in communication with the measurement sensor apparatus for receiving signals from the measurement sensor apparatus indicative of said distance and for processing said signals to calculate a pool depth corresponding to said distance, said pool depth related to a location of an edge of said pool adjacent said beach, angle adjustment apparatus connected to the basket and controlled by the control system for adjusting angle of the basket, thereby adjusting extent of the beach, the basket pivotably connected by two spaced-apart pivot members to the base beneath said rear boundary line, the basket pivotable at a pivot point beneath the rear boundary line, and the control system controlling the angle adjustment apparatus to maintain the rear boundary line above a line between the two spaced-apart pivot members and thereby maintain a desired beach extent,

forming a pool of the material on the screen apparatus so that there is a beach on the screen apparatus,

treating the material in the vibratory separator,

adjusting the angle of the basket and the extent of the beach with the angle adjustment apparatus, and

maintaining extent of the beach with the control system.

19. The method of claim 18 wherein the vibratory separator is a shale shaker and the material is drilling fluid with drilled cuttings therein.

20. The method of claim 18 wherein the vibratory separator has flow sensor apparatus connected to the vibratory separator for sensing the flow of the material onto the screen apparatus, the flow sensor apparatus controlled by and in communication with the control system, the control system adjusting basket angle in response to signals from the flow sensor apparatus, the method further comprising

adjusting the basket angle with the angle adjustment apparatus upon cessation of material flowing into the basket to accommodate the recommencement of material flowing into the basket onto the screen apparatus.