Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...
Patent
1981-10-13
1983-09-27
Novosad, Stephen J.
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
Fluid or cuttings directing or receiving means engaging bore...
277 31, 166 84, E21B 33068
Patent
active
044063334
ABSTRACT:
There is disclosed a rotating head for a rotary drilling rig which is to be secured to the top of the well pipe having an inner rotating portion with an opening therethrough which permits passage of drill pipe, pipe joints, and Kelly tools; the rotating portion has an annular drive rubber formed integrally with the top portion thereof. A rotating head drive bushing having an opening with a cross-sectional shape generally conforming to the cross-section of the Kelly tool to permit only sliding motion therebetween is provided with helical external ridges which produce a disengagable gripping action with the opening in the drive rubber at the top of the rotating portion of the rotating head. The rotating portion has a conventional stripper rubber at the bottom thereof and is mounted with a double roller bearing to provide low friction motion with respect to the fixed portion of the head. The double roller bearing is lubricated with a viscous lubricating material and paddles are provided between the sets of rollers of the double roller bearing for distributing the viscous lubricating material and in particular propel it onto the upper set of bearings; the upper body portion of the rotating head is readily detachable from the lower sleeve portion which is normally welded to the well conductor pipe.
REFERENCES:
patent: 2243439 (1941-05-01), Pranger et al.
patent: 2846247 (1958-08-01), Davis
Falk Joseph
Keegan Robert R.
Novosad Stephen J.
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