Nanping N Wu

US Patent:

20020195234, Dec 26, 2002

Filed:

Jun 25, 2001

Appl. No.:

09/891576

Inventors:

Nanping Wu - Madison WI, US

International Classification:

F28F009/26
F28F003/12

US Classification:

165/144000, 165/168000

Abstract:

An evaporator for use in a plate freezer utilizing carbon dioxide as the refrigerant has a duct with an elliptical shaped cross section. The duct allows a refrigerant, such as carbon dioxide, to pass through the evaporator to create a low-temperature freezer space.

US Patent:

51616149, Nov 10, 1992

Filed:

May 31, 1991

Appl. No.:

7/708161

Inventors:

Nanping Wu - Madison WI
Carl R. Marschke - Phillips WI

Assignee:

Marguip, Inc. - Phillips WI

International Classification:

E21B 3500

US Classification:

166277

Abstract:

An apparatus for providing access to the casing of a burning oil well near the wellhead includes a sled-like carriage which is moved over the ground surface into a position straddling the well casing. A heat shield carried by the sled shields personnel and equipment thereon from the well fire. An excavator is mounted on the sled behind the heat shield for movement toward and beneath the heat shield to excavate a cavity around the well casing. A platform apparatus on the sled, including a pair of jaws openable to allow receipt of the casing, covers the excavated cavity into which a known well plugging device is moved for attachment to the well production pipe after the outer casing is cut away.