Method and apparatus for on-grade boring

Details Method and apparatus for on-grade boring Method and apparatus for on-grade boring

2006-08-08

2006-08-08

Barrett, Suzanne Dino (Department: 3673)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Advancing subterranean length of pipe or cable

C405S184300

Reexamination Certificate

active

07086808

ABSTRACT:
A method for installation of an underground pipe includes an initial step of boring a pilot hole through the ground at a predetermined grade angle by extending a drill string having a steerable boring bit mounted thereon through the ground. Upon reaching an end location for the pilot hole, the bit is removed from the drill string, and an expander having a diameter greater than the pilot hole is attached to the drill string, which expander is backed by an impact device such as a pneumatic impactor including a striker that delivers repeated impacts to a rearwardly facing surface of the expander, and by a pipe drawn along behind the expander. The expander is pulled back through the pilot hole at the grade angle while the impactor is operated to aid progress of the expander through the ground and pull the pipe into place behind the expander. Typically in this method the replacement pipe is coupled to a rear end of the expander and the boring bit has a sonde housing containing a sonde attached thereto to indicate to an operator the orientation of a steering face on the boring bit.

REFERENCES:
patent: 4024721 (1977-05-01), Takada et al.
patent: 4507019 (1985-03-01), Thompson
patent: 4784230 (1988-11-01), Cherrington et al.
patent: 4907658 (1990-03-01), Stangl et al.
patent: 4953638 (1990-09-01), Dunn
patent: 4983071 (1991-01-01), Fisk et al.
patent: RE33793 (1992-01-01), Cherrington et al.
patent: 5098225 (1992-03-01), Rockower et al.
patent: 5171106 (1992-12-01), Rockower et al.
patent: 5306101 (1994-04-01), Rockower et al.
patent: RE35271 (1996-06-01), Fisk et al.
patent: 5580188 (1996-12-01), Nowak
patent: 5651639 (1997-07-01), Wentworth et al.
patent: 5778991 (1998-07-01), Runquist et al.
patent: 5782311 (1998-07-01), Wentworth
patent: 6148935 (2000-11-01), Wentworth et al.
patent: 6261027 (2001-07-01), Wentworth et al.
patent: 6269889 (2001-08-01), Wentworth
patent: 6283299 (2001-09-01), Lee
patent: 6305880 (2001-10-01), Carter et al.
patent: 6390087 (2002-05-01), Wentworth et al.
patent: 6411094 (2002-06-01), Gard et al.
patent: 6454025 (2002-09-01), Runquist et al.
patent: 6536539 (2003-03-01), Merecka et al.
patent: 6585062 (2003-07-01), Rozendaal et al.
patent: 6659198 (2003-12-01), Camp
patent: 6668946 (2003-12-01), Rankin et al.
patent: 6682264 (2004-01-01), McGillis
patent: 6755593 (2004-06-01), Wentworth et al.
patent: 6761507 (2004-07-01), Wentworth et al.
patent: 2003/0044238 (2003-03-01), Wentworth et al.
patent: 2003/0084764 (2003-05-01), Wentworth
patent: 2004/0028476 (2004-02-01), Payne et al.
patent: 2004/0184885 (2004-09-01), McGillis
Miller Xpandit brochure on Trenchless Pipe Replacement, Miller Pipeline Corporation, 1994 (8 pages).
Underground Construction, Rehab Product Focus on Trenchless Pipe Replacement, article on Miller Pipeline Bursting System (Circle No. 217) and article on Nowak Pipe Reaming (Circle No. 218), p. 62, Mar. 2004 (1 page).
“Combined Dry Percussive/Fluid Lubricated Directional Drilling Systems for the Trenchless Installation of Pipes, Ducts & Cables,” Steve Vick, www.stevevick.com, 7 pages.

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