US 7,320,373 B2 | ||
One-step directional coring or drilling system | ||
Philippe R. Fanuel, Brussels (Belgium); Luis E. Quintana, Brussels (Belgium); and Olivier Mageren, Gilly (Belgium) | ||
Assigned to Halliburton Energy Services, Inc., Houston, Tex. (US) | ||
Filed on Sep. 05, 2006, as Appl. No. 11/470,123. | ||
Application 11/470123 is a continuation of application No. 11/089912, filed on Mar. 25, 2005, granted, now 7,117,958. | ||
Application 11/089912 is a continuation of application No. PCT/BE03/00161, filed on Sep. 25, 2003. | ||
Claims priority of application No. 2002/0563 (BE), filed on Sep. 26, 2002. | ||
Prior Publication US 2007/0017707 A1, Jan. 25, 2007 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. E21B 7/08 (2006.01) |
U.S. Cl. 175—61 [175/82; 166/117.6] | 1 Claim |
1. An assembly for sidetracked drilling, in a wall of a borehole previously drilled in a formation comprising:
a guide element;
an expansible device fixed to the front end of the guide element operable to be selectively expanded by an actuation means;
a sidetracking channel formed in the guide element in alignment with an internal space, upstream of the expansible device
in the direction of advance;
a longitudinal cavity formed in the guide element parallel to the longitudinal axis and arranged to allow passage from the
internal space to the actuation means of the expansible device;
in the internal space of the guide element, an external tube of a core barrel including a core bit fixed to the front end
of the external tube;
the core bit arranged operable to slide, after having been released, in the internal space and in the sidetracking channel
and then progress to the formation;
the external tube of the core barrel configured to direct drilling fluid to actuate the expansible device.
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