Theodore H Kritikos

Address:

1001 Raspberry Vly Ct, Hendersonville, TN 37075

Phone:

(615)4312233

VIN:

5TDZK22C68S184969

Make:

TOYOTA

Model:

SIENNA

Year:

2008

US Patent:

52537048, Oct 19, 1993

Filed:

Nov 13, 1990

Appl. No.:

7/611797

Inventors:

Reginald J. Barrus - Jefferson LA
Donald J. Barrus - Los Alamintos CA
Theodore A. Kritikos - New Orleans LA
John W. Owensby - New Orleans LA

Assignee:

KOB, Inc. - Gretna LA

International Classification:

E21B 3402

US Classification:

166 53

Abstract:

The disclosure relates to an improved diaphragm type mud saver valve, commonly referred to as a Kelley valve, which closes automatically to prevent loss and spilling of drilling mud. The improved valve can withstand very high drilling and pump pulsation pressures, for example, the pressures required for drilling wells over 20,000 feet in depth and mud pressures can exceed 15,000 p. s. i. The disclosure prevents the formation of gas pockets by providing gas escape openings and a clearance space between the support and backup element to prevent the extrusion of the diaphragm material through the small openings in a backup sleeve thus extending the life of the diaphragm and allowing proper diaphragm seating.

US Patent:

49695134, Nov 13, 1990

Filed:

Sep 22, 1989

Appl. No.:

7/410889

Inventors:

Reginald J. Barrus - Jefferson LA
Donald J. Barrus - Los Alamintos CA
Theodore A. Kritikos - New Orleans LA
John W. Owensby - New Orleans LA

Assignee:

KOB, Inc. - Gretna LA

International Classification:

E21B 3402

US Classification:

166 53

Abstract:

A mud saver valve for automatically closing to prevent loss and spilling of drilling mud. The valve contains a diaphragm, rigid backup means and diaphragm support means so that the valve can be used in high pressure wells.