Joseph Clifton Mellott
Engineering in Fort Smith, AR
License number
Louisiana PE.0025258
Issued Date
Feb 2, 1993
Expiration Date
Sep 30, 2001
Category
Civil Engineer
Type
Petroleum Engineer
Address
Address
PO Box 8133, Fort Smith, AR 72902
Professional information
Down Hole Air Diverter
US Patent:
7387176, Jun 17, 2008
Filed:
May 7, 2005
Appl. No.:
11/123596
Inventors:
Joseph C. Mellott - Fort Smith AR, US
International Classification:
E21B 7/18, E21B 21/10
US Classification:
175317, 175 71, 175324
Abstract:
A down hole air diverter having a first opening in communication with the central passageway of a drillstring; a second opening in communication with the well bore annulus; and a means to control the flow of pneumatic fluid between the first opening and the second opening. The means to control the flow further includes a first sealing means and a first biasing means to control the first sealing means. The first sealing means allows communication with the well bore annulus when the well bore annulus pressure exceeds the first biasing means pressure and prevents communication when the bias pressure exceeds the bore annulus pressure. A second sealing means prevents communication with the drillstring when the pressure from the second sealing means chamber exceeds the first opening pressure and allowing communication when the first opening pressure exceeds the chamber pressure.