Title:
Well drilling apparatus
United States Patent 2960311


Inventors:
Scott, Paul J.
Application Number:
US64815257A
Publication Date:
11/15/1960
Filing Date:
03/25/1957
Assignee:
Scott, Paul J.
Primary Class:
Other Classes:
173/28, 173/197, 175/170, 414/22.54
International Classes:
E21B7/02; E21B19/15
View Patent Images:
US Patent References:
2848196Portable drilling rig1958-08-19
2803434Rotary well drilling machine1957-08-20
2728555Portable drill rigs1955-12-27
2651181Floating telescopic piling template1953-09-08
2594098Drilling apparatus1952-04-22
2490471Posthole digger1949-12-06
1377575N/A1921-05-10
0110359N/A1870-12-20