Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2005-02-08
2005-02-08
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S325400, C175S408000
Reexamination Certificate
active
06851489
ABSTRACT:
A well borehole is prevented from deviating from its intended vertical path as it is being drilled by use of a sub assembly which is eccentrically weighted with respect to its axis of rotation. Such a sub assembly can comprise a straight tubular member weight relieved along one side by, for example, forming a cavity within the heavy walls of the tubular member along the side of the collar. Thus, the eccentric weight is imposed upon the drill bit without providing any protrusions or elbows which are designed to bear on the wall of the borehole. Additionally, as the cavity is contained within the heavy walls of the tubular member, drilling fluids containing various debris cannot inhabit the cavity, thus maintaining a constant eccentric weight upon the drill bit.
REFERENCES:
patent: 3062303 (1962-11-01), Schultz
patent: 3092188 (1963-06-01), Farris et al.
patent: 3141512 (1964-07-01), Gaskell et al.
patent: 3298449 (1967-01-01), Bachman et al.
patent: 3983948 (1976-10-01), Jeter
patent: 4068730 (1978-01-01), Arnold
patent: 4168754 (1979-09-01), Nyholm
patent: 4190122 (1980-02-01), Arnold
patent: 4416339 (1983-11-01), Baker et al.
patent: 4493380 (1985-01-01), Townson
patent: 4699224 (1987-10-01), Burton
patent: 4874045 (1989-10-01), Clayton
patent: 4225009 (1994-02-01), None
Bagnell David
Gay Jennifer H
The Matthews Firm
LandOfFree
Method and apparatus for drilling wells does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for drilling wells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for drilling wells will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3468943