Document Type and Number:
United States Patent US2735652
Kind Code:
A
Publication Date:
February 21, 1956
Export Citation:
Primary Class:
International Classes:
E21B25/16; E21B25/00
Domestic Patent References:
| 1841790A | Device for recording dips in formation of well bores | |||
| 1864113A | Apparatus and method of taking core samples of rock in bore holes | |||
| 1935078A | Magnetic orienter for well core barrels | |||
| 2034257A | Core barrel | |||
| 2147544A | Orienting sub | |||
| 2197062A | Orienting core barrel | |||
| 2292838A | Method and apparatus for imparting directional magnetic properties to core samples | |||
| 2489566A | Core orienting apparatus | |||
| 2544979A | Apparatus for orienting tools in well bores |