Title:
Bridging and heaving plug
United States Patent 2675878


Inventors:
Roy, Macgregor Robert
Application Number:
US31190452A
Publication Date:
04/20/1954
Filing Date:
09/27/1952
Assignee:
Roy, Macgregor Robert
Primary Class:
Other Classes:
166/135, 166/136, 166/202
International Classes:
E21B33/134
View Patent Images:
US Patent References:
2618345Bridge plug and dump bailer1952-11-18
2618344Bridging plug1952-11-18
2605846Deep well bridge1952-08-05
2601614Pipe-cleaning device1952-06-24
2023724Measuring line for well plugs1935-12-10
1497629Bridge builder1924-06-10