Deviation device

Details Deviation device Deviation device

1980-01-15

1981-07-07

Leppink, James A.

Boring or penetrating the earth

Boring without earth removal

Fluid passage to exterior of drive point

175 73, 175402, E21B 708

Patent

active

042769426

ABSTRACT:
A deivation device for causing a conductor string to deviate as it is being driven into a subterranean formation.
The deviation device comprises a straight tubular element, open at both ends, wherein the wall of the tubular element at an end part is provided with guide faces normally directed downwardly in the formation. These guide faces are inclined relative to the longitudinal axis of the tubular element and are arranged within the periphery of the tubular element.
Said guide faces consist of a first guide face at the outer side of the tubular element and a second guide face at the inner side of the tubular element. The wall portion of the tubular element which is provided with the first guide face is arranged diametrically opposite to the wall portion of the tubular element which is provided with the second guide face, the guide faces of the tubular element, when taken in diametric cross-section, being substantially parallel to each other and at the same angle to the axis of the tubular element.

REFERENCES:
patent: 1019357 (1912-03-01), Porter et al.
patent: 3051254 (1962-08-01), McClinton
patent: 3415329 (1968-12-01), Marlind
patent: 3610346 (1971-10-01), Ziober
patent: 3899032 (1975-08-01), Reese
patent: 3968847 (1976-07-01), Werblin
patent: 4027734 (1977-06-01), Horvath

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