Title:
APPARATUS FOR DRILLING INCLINED BOREHOLES WITH DRILL BIT SUPPORT
United States Patent 3539024


Inventors:
Irons, John D.
Hester Jr., Ray W.
Bleyl, Donald L.
Application Number:
US3539024DA
Publication Date:
11/10/1970
Filing Date:
08/09/1968
Assignee:
BROWN & ROOT
Primary Class:
Other Classes:
173/44, 173/190, 175/9, 175/220, 414/22.53
International Classes:
E21B15/04; E21B19/14; (IPC1-7): E21B7/04; E21B15/00; E21B19/14
View Patent Images:
US Patent References: