Magnetic vibratory screen clamping

• US 8,695,805 B2
• Filed: 10/15/2012
• Issued: 04/15/2014
• Est. Priority Date: 11/06/2002
• Status: Expired due to Term

• Current Assignee: National Oilwell Varco LP (NOV, Inc.)
• Original Assignee: National Oilwell Varco LP (NOV, Inc.)
• Inventors: Dufilho, Paul, Scott, Eric
• Primary Examiner(s): MATTHEWS, TERRELL HOWARD
• Application Number:
  US13/651,745
• Publication Number:
  US 20130043168A1
• Time in Patent Office: 547 Days
• Field of Search: 209/393, 209/401, 209/403, 209/405, 209/412
• US Class Current: 209/403
• CPC Class Codes: B01D 33/0315 arranged for inward flow filtration
• CPC Class Codes: B01D 33/0376 supported
• CPC Class Codes: B01D 33/37 in parallel connection
• CPC Class Codes: B01D 33/722 containing fixed liquid displacement elements or cores
• CPC Class Codes: B01D 33/76 for discharging the filter cake, e.g. chutes
• CPC Class Codes: B07B 1/42 Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
• CPC Class Codes: B07B 1/46 Constructional details of screens in general; Cleaning or heating of screens
• CPC Class Codes: B07B 13/16 Feed or discharge arrangements
• CPC Class Codes: B07B 13/18 Control

Abstract

The present disclosure is generally directed to vibratory separators that are used for processing drilling fluid, and in particular, vibratory separators that utilize electro-magnetic clamping apparatuses for attaching screen assemblies to a basket assembly. In one exemplary embodiment, an illustrative vibratory separator is disclosed which includes, among other things, a basket assembly having at least one screen support, and at least one screen assembly that is adapted to be releasably secured to the at least one screen support. Additionally, the disclosed vibratory separator also includes an electro-magnetic clamp apparatus that is adapted to releasably secure the at least one screen assembly to the at least one screen support when the electro-magnetic clamp apparatus is energized to a magnetized state, and to release the at least one screen assembly from the at least one screen support when the electro-magnetic clamp apparatus is de-energized to an un-magnetized state.

Claims

1. A vibratory separator, comprising:

a basket assembly comprising at least one screen support;

at least one screen assembly that is adapted to be releasably secured to said at least one screen support; and

an electro-magnetic clamp apparatus that is adapted to releasably secure said at least one screen assembly to said at least one screen support when said electro-magnetic clamp apparatus is energized to a magnetized state and to release said at least one screen assembly from said at least one screen support when said electro-magnetic clamp apparatus is de-energized to an un-magnetized state.

2. The vibratory separator of claim 1, further comprising a control apparatus that is operatively coupled to said vibratory separator, said control apparatus being adapted to send a temporary electric pulse signal to said electro-magnetic clamp apparatus so as to control operation of said electro-magnetic clamp apparatus.

3. The vibratory separator of claim 2, wherein said electro-magnetic clamp apparatus is adapted to be energized to a magnetized state when a temporary electric pulse signal is received from said control apparatus while said electro-magnetic clamp apparatus is in an un-magnetized state, and wherein said electro-magnetic clamp apparatus is further adapted to be de-energized to an un-magnetized state when a temporary electric pulse signal is received from said control apparatus while said electro-magnetic clamp apparatus is in a magnetized state.

4. The vibratory separator of claim 2, wherein said electro-magnetic clamp apparatus is adapted to remain in an un-magnetized state after said electro-magnetic clamp apparatus has been de-energized by a temporary electric pulse signal until said electro-magnetic clamp apparatus receives a further temporary electric pulse signal from said control apparatus, and wherein said electro-magnetic clamp apparatus is adapted to remain in magnetized state after said electro-magnetic clamp apparatus has been energized by a temporary electric pulse signal until said electro-magnetic clamp apparatus receives a further temporary electric pulse signal from said control apparatus.

5. The vibratory separator of claim 2, further comprising:

a vibratory motor apparatus that is operatively coupled to said basket assembly, said vibratory motor apparatus being adapted to accelerate said basket assembly; and

a sensory apparatus that is operatively coupled to said basket assembly, said sensory apparatus being adapted to sense an acceleration of said basket assembly and to generate a signal representing said sensed acceleration.

6. The vibratory separator of claim 5, wherein said sensing apparatus comprises an accelerometer.

7. The vibratory separator of claim 5, wherein said control apparatus is adapted to receive said signal representing said sensed acceleration from said sensory apparatus and to adjust acceleration of said basket assembly based on said received signal.

8. The vibratory separator of claim 7, further comprising a drive apparatus that is operatively coupled to said vibratory motor apparatus, said drive apparatus being adapted to selectively drive said vibratory motor at a selected speed, wherein said control apparatus is adapted to adjust acceleration of said basket assembly by controlling said drive apparatus.

9. The vibratory separator of claim 8, wherein said drive apparatus comprises a variable frequency drive.

10. A vibratory separator, comprising:

a basket assembly comprising at least one screen support;

at least one screen assembly that is adapted to be releasably secured to said at least one screen support;

an electro-magnetic clamp apparatus that is adapted to releasably secure said at least one screen assembly to said at least one screen support when said electro-magnetic clamp apparatus is energized to a magnetized state and to release said at least one screen assembly from said at least one screen support when said electro-magnetic clamp apparatus is de-energized to an un-magnetized state;

a vibratory motor apparatus that is operatively coupled to said basket assembly, said vibratory motor apparatus being adapted to accelerate said basket assembly;

a sensory apparatus that is operatively coupled to said basket assembly, said sensory apparatus being adapted to sense an acceleration of said basket assembly; and

a control apparatus that is operatively coupled to said vibratory separator, said control apparatus being adapted to adjust acceleration of said basket assembly and to control operation of said electro-magnetic clamp apparatus.

11. The vibratory separator of claim 10, wherein said sensory apparatus is adapted to generate a signal representing said sensed acceleration to said control apparatus, and said control apparatus is adapted to receive said signal from said sensory apparatus and to adjust acceleration of said basket assembly based on said received signal.

12. The vibratory separator of claim 11, wherein said control apparatus is adapted to control said electro-magnetic clamp apparatus by sending a temporary electric pulse signal to said electro-magnetic clamp apparatus.

13. The vibratory separator of claim 12, wherein said electro-magnetic clamp apparatus is adapted to be energized to a magnetized state when a temporary electric pulse signal is received from said control apparatus while said electro-magnetic clamp apparatus is in an un-magnetized state.

14. The vibratory separator of claim 13, wherein said control apparatus is adapted to drive said vibratory motor apparatus to increase acceleration of said basket assembly when said sensed acceleration of said basket assembly drops below a predetermined acceleration level and to send at least one temporary electric pulse signal to said electro-magnetic clamp apparatus so as to energize said electro-magnetic clamp apparatus to a magnetized state while increasing said acceleration of said basket assembly.

15. The vibratory separator of claim 14, further comprising a drive apparatus that is operatively coupled to said vibratory motor apparatus, said drive apparatus being adapted to selectively drive said vibratory motor at a selected speed, wherein said control apparatus is adapted to adjust acceleration of said basket assembly by controlling said drive apparatus.

16. The vibratory separator of claim 15, wherein said drive apparatus comprises a variable frequency drive.

17. The vibratory separator of claim 12, wherein said electro-magnetic clamp apparatus is adapted to be de-energized to an un-magnetized state when a temporary electric pulse signal is received from said control apparatus while said electro-magnetic clamp apparatus is in a magnetized state.

18. The vibratory separator of claim 15, wherein said control apparatus is adapted to drive said vibratory motor apparatus to decrease acceleration of said basket assembly when said sensed acceleration of said basket assembly rises above a predetermined acceleration level and to send at least one temporary electric pulse signal to said electro-magnetic clamp apparatus so as to de-energize said electro-magnetic clamp apparatus to an un-magnetized state while decreasing said acceleration of said basket assembly.

19. The vibratory separator of claim 12, wherein said control apparatus is adapted to adjust acceleration of said basket assembly to a substantially constant acceleration level when loading conditions on said screen assembly are changed.

20. The vibratory separator of claim 12, wherein said sensing apparatus comprises an accelerometer.