A tool and method of boring and filling the borehole with concrete without removing soil therefrom

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(11)

EP 0 664 373 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	24.04.1996 Bulletin 1996/17

(43)	Date of publication A2:
	26.07.1995 Bulletin 1995/30

(21)	Application number: 95100599.0

(22)	Date of filing: 18.01.1995

(51)	International Patent Classification (IPC)⁶: E21B 10/08, E02D 5/36, E21B 7/26, E21B 33/13, E21B 10/20

(84)	Designated Contracting States:
	BE DE ES FR GB IT NL PT

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Priority:

21.01.1994 IT TO940029

(71)	Applicant: SOILMEC S.p.A.
	I-47023 Cesena (Province of Forli) (IT)

(72)	Inventor:
	Pedrelli, Marco I-47023 Cesena, Forli (IT)

(74)	Representative: Lotti, Giorgio et al
	c/o Ing. Barzanò & Zanardo Milano S.p.A. Corso Vittorio Emanuele II, 61 I-10128 Torino I-10128 Torino (IT)

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References cited: :

(54)	A tool and method of boring and filling the borehole with concrete without removing soil therefrom

(57) A boring tool (10), particularly for use in concrete foundation pile construction, adapted for mounting to the lower end of a rod string (11) rotating about its longitudinal axis (x) and advancing along this axis. The boring tool comprises a roller (12) idly mounted with respect to the rods (11) and rotatable about an axis (y) inclined with respect to the longitudinal axis (x). The roller (12) has end portions (12a, 12b) located on opposite sides with respect to axis (x). The lower end portion (12b) of the roller (12) is fitted with a cutting bit (15) for disgregating soil. The roller has a fuse-like side surface and tapered upper (12a) and lower (12b) end portions, and a larger median portion (12c).

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