Stabilizer device for rotary string of drill rods with...

Details Stabilizer device for rotary string of drill rods with... Stabilizer device for rotary string of drill rods with...

2005-08-30

2005-08-30

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C175S323000

Reexamination Certificate

active

06935442

ABSTRACT:
The stabilizer (1) has a tubular central body (3) having means for connection (3a, 3b) to a first and a second component of the string of drill rods and at least one external contact element (4) with a wall (2a) of the borehole (2). The external element (4) for contact of the stabilizer (1) with the wall (2a) of the borehole (2) has at least one means for activation (6) of a means (7) co-operating with the wall (2a) of the borehole (2) to limit the friction between the contact element (4) and the wall (2a) of the borehole (2). The activation means can consist of inter-blade spaces (6) for acceleration of the circulation (7) of the drilling liquid or by a means for coupling in rotation of the external element (4) and the central body (3) of the stabilizer (1).

REFERENCES:
patent: 1824466 (1931-09-01), Criley
patent: 2072320 (1937-03-01), Thomas
patent: 2715552 (1955-08-01), Lane
patent: 3370657 (1968-02-01), Wade
patent: 4984633 (1991-01-01), Langer et al.
patent: 4989679 (1991-02-01), Amaudric du Chaffaut
patent: 5931239 (1999-08-01), Schuh
patent: 6250405 (2001-06-01), Moore et al.
patent: 6702042 (2004-03-01), Genevois et al.
patent: 2 625 253 (1989-06-01), None

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