EP 0380910 A3 19920527 - METHOD AND APPARATUS FOR HORIZONTAL DRILLING

Title (en)

METHOD AND APPARATUS FOR HORIZONTAL DRILLING

Publication

EP 0380910 A3 19920527 (DE)

Application

EP 90100112 A 19900104

Priority

DE 3902868 A 19890201

Abstract (en)

[origin: CA2008977A1] The present invention comprises a novel method and apparatus for forming a perimeter lined, generally horizontally directed drill hole in a variety of soil formations. More particularly, the present invention discloses a method and apparatus for horizontal drilling which allows for the preparation of reinforced drill holes of a small diameter and precise heading by the use of a directed drilling tool seated within a mantle tube and the simultaneous advancement into various soil formations of this combination.

IPC 1-7

E21B 7/06; E21B 7/20

IPC 8 full level

E21B 7/06 (2006.01); E21B 7/20 (2006.01)

CPC (source: EP US)

E21B 7/068 (2013.01 - EP US); E21B 7/208 (2013.01 - EP US)

Citation (search report)

EP 0109699 A2 19840530 - SHELL INT RESEARCH [NL]
US 4176985 A 19791204 - CHERRINGTON MARTIN D [US]
US 4121673 A 19781024 - CHERRINGTON MARTIN DEE
US 4629012 A 19861216 - SCHUH FRANK J [US]
DE 3534662 A1 19870409 - HUNEKE KARL [DE], et al
DE 3423465 C1 19850502 - CHRISTENSEN INC NORTON

Designated contracting state (EPC)

BE FR GB NL

DOCDB simple family (publication)

DE 3902868 C1 19900607; CA 2008977 A1 19900801; EP 0380910 A2 19900808; EP 0380910 A3 19920527; EP 0380910 B1 19950308; NO 900457 D0 19900131; NO 900457 L 19900802; US 5033556 A 19910723

DOCDB simple family (application)

DE 3902868 A 19890201; CA 2008977 A 19900131; EP 90100112 A 19900104; NO 900457 A 19900131; US 47272590 A 19900131