Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent
1989-11-14
1989-11-14
Novosad, Stephen J.
Boring or penetrating the earth
With below-ground tool drive prime mover
Fluid rotary type
175 61, 175 73, 175320, E21B 706, E21B 1720
Patent
active
048800678
ABSTRACT:
A non-rotating drill string is formed from a plurality of independent, cylindrical sections pivotally connected together by a latch mechanism. The adjacent ends are partially beveled such that the sections can bend in a single direction. Means are disclosed for varying the effect of the beveled surfaces, thus controlling the angle of bend for a given one of the sections. A downhole mud motor (PDM) drives the drill bit through the use of a flexible drive shaft running through the center of a metal-lined, neoprene drilling fluid hose which runs through the interior of the independent cylindrical sections. The total curvature of the borehole drilled by the system equals the sum of the angles of bend between the individual sections.
REFERENCES:
patent: 2336338 (1943-12-01), Zublin
patent: 2687282 (1954-08-01), Sanders
patent: 2778603 (1957-01-01), McCune
patent: 4042046 (1977-08-01), Capoccia
patent: 4143722 (1979-03-01), Driver
patent: 4227584 (1980-10-01), Driver
patent: 4361193 (1982-11-01), Gravley
patent: 4432423 (1984-02-01), Lyons
patent: 4442908 (1984-04-01), Steenbock
patent: 4446932 (1984-05-01), Hipp
patent: 4577701 (1986-03-01), Dellinger
patent: 4693327 (1987-09-01), Dickinson et al.
Baroid Technology Inc.
Novosad Stephen J.
LandOfFree
Apparatus for drilling a curved borehole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for drilling a curved borehole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for drilling a curved borehole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1847903