MILLING DRILL BIT WITH HERMETICALLY SEALED OIL-FILLED SUPPORTS Russian patent published in 1994 - IPC

Abstract RU 2007539 C1

FIELD: well drilling. SUBSTANCE: duct 10 with check valve 11 is located in the upper part of housing 1. Duct 10 through its outlet part communicates with the chamber of lubricator 5 under sleeve 6. Check valve 11 is made for operation at a probable shut-off of through hole 13 in the bottom part of sleeve 6 by diaphragm 7. During operation lubricant is additionally forced out of ducts 9, and durability of the drill bit increases. EFFECT: facilitated procedure. 2 dwg

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RU 2 007 539 C1

Authors

Zaburdaev A.K.

Pozdnjakov V.I.

Guk R.I.

Murzabekov T.K.

Dates

1994-02-15—Published

1991-07-23—Filed