Title:
Wellhead cementing assembly with by-pass
United States Patent 3155175
US Patent References:
Control head
- - 1976238
Casing-head structure
- - 2202192
Method of batch cementing
- - 2293904
Multi-purpose wellhead apparatus for oil wells
- - 3077931
Control head
- - 1976238
Casing-head structure
- - 2202192
Method of batch cementing
- - 2293904
Multi-purpose wellhead apparatus for oil wells
- - 3077931
Inventors:
Johnson, Glenn D.
Publication Date:
11/03/1964
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Export Citation:
Assignee:
SHELL OIL CO
Primary Class:
Other Classes:
285/123.300, 166/358, 285/404, 166/368, 166/352
International Classes:
E21B7/128; E21B33/043; E21B33/14; E21B7/12; E21B33/03; E21B33/13
Foreign References:
| GB814520A |