US PATENT SUBCLASS 89 / 1.15
WELL PERFORATORS
Current as of: June, 1999
Click HD for Main Headings
Click for All Classes
DEFINITION
Classification: 89/1.15
WELL PERFORATORS:
(under the class definition) Subject matter used to make a hole in a well pipe and/or the surrounding bore.
SEE OR SEARCH CLASS
166, Wells,
55+, 63 and 297 for perforating well pipes.
175, Boring or Penetrating the Earth,
2+, for a process or means for penetrating the earth by means of a below ground explosion and including a device for firing a bullet or shaped charge to penetrate the earth formation or perforate a casing or other wall member in the bore.
