Hydrocarbon recovery drill string apparatus, subterranean hydrocarbon recovery drilling methods, and subterranean hydrocarbon recovery methods
Disclosed are hydrocarbon recovery drill string apparatus, subterranean hydrocarbon recovery drilling methods, and subterranean hydrocarbon recovery methods. In one embodiment, a hydrocarbon recovery drill string apparatus includes an elongated assembly within which a rotatable drill rod is received. The assembly comprises a longitudinal axis, a drill rod entrance end, and a drill rod exit end. The assembly comprises a tailcuttings diverter pipe proximate the drill rod exit end, with the tailcuttings diverter pipe defining an initial fluid flow path of the tailcuttings from the longitudinal axis which is acute from the longitudinal axis. Other apparatus and method aspects are contemplated.
1. A hydrocarbon recovery drill string apparatus, comprising:
an elongated assembly within which a rotatable drill rod is received, the assembly comprising a rotating head apparatus comprising:
a male bearing spindle through which the drill rod is rotatably received, the male bearing spindle comprising threads, the male bearing spindle threads comprising a longitudinal outer surface;
a female spindle receiver through which the drill rod is rotatably received, the female spindle receiver comprising threads which threadedly receive the male bearing spindle threads, the female spindle receiver threads comprising a longitudinal inner surface against which a non-metallic seal is received, the longitudinal outer surface of the male bearing spindle threads bearing against the non-metallic seal; and
a rotatable head received rotatably by and about the male bearing spindle, the drill rod being rotatable with the rotatable head.
2. The apparatus of claim 1 wherein the rotatable head extends over the female spindle receiver.
3. The apparatus of claim 1 wherein the non-metallic seal comprises an o-ring.
4. The apparatus of claim 1 wherein the longitudinal inner surface of the female spindle receiver threads comprises a groove within which the non-metallic seal is received.
5. The apparatus of claim 4 wherein the non-metallic seal comprises an o-ring.
6. The apparatus of claim 1 comprising roller bearings received between the male bearing spindle and the rotatable head.
7. The apparatus of claim 1 wherein the male bearing spindle comprises a radially extending surface portion having another non-metallic seal received thereagainst, the rotatable head comprising a portion projecting radially inward that longitudinally bears against and rotates relative to the non-metallic seal that is received against the radially extending surface portion.
8. A hydrocarbon recovery drill string apparatus, comprising:
an elongated assembly within which a rotatable drill rod is received, the elongated assembly comprising a rotating head apparatus comprising:
a bearing spindle apparatus through which the drill rod is rotatably received, the bearing spindle apparatus comprising a radially extending surface portion, a non-metallic seal received against the radially extending surface portion; and
a rotatable head assembly received by and about the bearing spindle apparatus, the rotatable head assembly comprising a portion projecting radially inward that longitudinally bears against and rotates relative to the non-metallic seal, the drill rod being rotatable with the rotatable head.
9. The apparatus of claim 8 wherein the rotatable head assembly comprises a longitudinal first section and a longitudinal second section which bolt relative to one another, roller bearings being received between the bearing spindle apparatus and the longitudinal first section, the radially inward projecting portion comprising part of the longitudinal second section.
10. The apparatus of claim 9 comprising packing received by the longitudinal second section and through which the drill rod is slidably received.
11. The apparatus of claim 10 wherein the rotatable head assembly comprises a longitudinal third section which bolts relative to the longitudinal second section and bears against the packing.