David K Nelsen
Engineers in Ponca City, OK
License number
Colorado 27571
Issued Date
May 13, 1991
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
Conocophillips, Ponca City, OK 74601
Professional information
Reduction Of Metal Stresses In Delayed Coking Drums
US Patent:
5804038, Sep 8, 1998
Filed:
Sep 8, 1997
Appl. No.:
8/925229
Inventors:
David K. Nelsen - Ponca City OK
Assignee:
Conoco Inc. - Ponca City OK
International Classification:
C10B 3900, C10B 4500, C10B 2900
US Classification:
201 39
Abstract:
The metal stresses in a delayed coke drum are reduced by externally cooling the coke drum near the junction of the drum shell and the supporting skirt thereof during the quench step. This reduces the metal stresses at the area around the welds of the drum skirt.
Delayed Coking Cycle Time Reduction
US Patent:
5891310, Apr 6, 1999
Filed:
Jun 20, 1997
Appl. No.:
8/879573
Inventors:
David K. Nelsen - Ponca City OK
Assignee:
Conoco Inc. - Ponca City OK
International Classification:
C10B 2904, C10B 1700
US Classification:
201 10
Abstract:
The cycle time for a delayed coker unit is reduced by externally heating the coke drum near the junction of the drum shell and the supporting skirt thereof prior to beginning the hot coker feed fill step. This reduces the thermal stresses at the area around the welds of the drum skirt.