PRESSURIZED WELL DRILLING SYSTEM
United States Patent 3500943

Inventors:
Bingman Jr., William E.
Publication Date:
03/17/1970
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Assignee:
SHELL OIL CO
Primary Class:
International Classes:
E21B21/06; E21B21/08; E21B21/00; E21B21/04
US Patent References:
3365009Drilling fluid circulation system having flow parameter regulating means
3399739Apparatus for treatment of hydraulic jet drilling liquid
2082329Method of drilling and simultaneously exploring oil wells and the like
3415331Process and an apparatus for bringing under control an unexpectedly producing well




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