Title:
Subsurface shifting apparatus
United States Patent 3335802


Inventors:
Seyffert III, Walter H.
Application Number:
US42780665A
Publication Date:
08/15/1967
Filing Date:
01/25/1965
Assignee:
BAKER OIL TOOLS INC
Primary Class:
Other Classes:
166/214
International Classes:
E21B23/02; E21B34/14
View Patent Images:
US Patent References:
3128828N/A1964-04-14
3051243Well tools1962-08-28
2991835Hanger or stop for well tools and means for inserting the same1961-07-11
2949963Sliding sleeve well tool1960-08-23
2924278Valve actuating device1960-02-09
2856007Well tool anchor1958-10-14
2790501Well flow control apparatus and system1957-04-30
2667926Apparatus for cementing wells1954-02-02
2568867Well tool1951-09-25