Method and apparatus for shutting in a well while leaving drill stem in the borehole
A Standard patent application filed on 22 October 1998 credited to Baird, Jeffrey D.
Details
Application number :
11952
Application type :
Standard
Application status :
LAPSED
Under opposition :
No
Proceeding type :
Invention title :
Method and apparatus for shutting in a well while leaving drill stem in the borehole