Title:
掘削方法およびドリル装置
Document Type and Number:
Japanese Patent JP3968309
Kind Code:
B2
Abstract:
The invention relates to a method for drilling, being carried out by a drilling apparatus, having a drilling device ( 1 ) that comprises a casing part ( 2 ) and a drilling unit ( 3 ), in the drilling head (I) of which there are first drilling means ( 4 ) for drilling a center hole and second drilling means ( 5 ) for reaming of the center hole for the casing part ( 2 ) as well as flushing flow arrangement ( 6 ) for flushing of waste, being generated. At least during the drilling situation, the first drilling means ( 4 ) are coupled by a power transmitting and, in order to enable removal of the same from the hole, removable arrangement, such as a bayonet coupling or like, with the second drilling means ( 5 ). A feed flow ( 6 a) of flushing medium, being carried out centrally, is being transferred by internal drillings (X 1 ) inside a first frame part ( 4 a), belonging to the first drilling means ( 4 ), to its outer periphery and a return flow ( 6 b) of flushing medium, in order to accomplish a so called reverse circulation of flushing medium, from the drilling surface (pp 2 ) of the first frame part ( 4 a) through internal drillings (X 2 ) therein into a space (z) between the first frame part ( 4 a) and the casing part ( 2 ). The invention relates also to a drilling apparatus for exploitation of the method described above.
More Like This:
| JP2004036204 | BORING METHOD |
| WO/2014/055287 | FLOW THROUGH GAUGE FOR DRILL BIT |
Inventors:
Gerberet, Jorma
Gerverais, Vesa
Gerverais, Vesa
Application Number:
JP2002579607A
Publication Date:
August 29, 2007
Filing Date:
February 18, 2002
Export Citation:
Assignee:
Oy Atlas Copco Rotex Ab
International Classes:
E21B10/38; E21B7/20; E21B10/64; E21B21/12
Domestic Patent References:
| JP9217578A | ||||
| JP8042276A | ||||
| JP63184689A |
Attorney, Agent or Firm:
Keiichiro Saikyo
Takeshi Sugiyama
Minetarou Hirose
Takeshi Sugiyama
Minetarou Hirose