Title:
Wellhead
United States Patent 3001803


Inventors:
Watts, John D.
Ireland, James C.
Hill, Erwin F.
Application Number:
US58310456A
Publication Date:
09/26/1961
Filing Date:
05/07/1956
Assignee:
GRAY TOOL CO
Primary Class:
Other Classes:
166/89.2, 285/123.6, 285/334.2, 285/339, 285/369
International Classes:
E21B33/047; F16L7/02; F16L39/00
View Patent Images:
US Patent References:
2794505Pipe hanging apparatus1957-06-04
2775471Tube coupling with sealed conical interface1956-12-25
2766829Conduit connections and sealing means therefor1956-10-16
2335355Producting equipment for wells1943-11-30
2074923Casing head1937-03-23
0935412N/A1909-09-28