Seal for a rolling cone cutter earth boring bit

Details Seal for a rolling cone cutter earth boring bit Seal for a rolling cone cutter earth boring bit

1978-12-21

1979-12-18

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

308 82, E21B 908

Patent

active

041790030

ABSTRACT:
A seal acts as a barrier to the drilling fluid, pulverized cuttings and other materials in a borehole preventing the materials from entering the bearing area of a rolling cone cutter earth boring bit and retains lubricant inside the bearing area. A rolling cone cutter is rotatably mounted on a cantilevered bearing pin extending from the bit body. A "Z" seal is positioned between the cutter and bearing pin. An outer rigid seal ring is positioned around the bearing pin. The outer rigid seal ring is split to allow radial expansion and contraction. An inner rigid smaller diameter seal ring is positioned around the bearing pin. The inner rigid seal ring is also split to allow radial expansion and contraction. An elastomer ring is located between the inner and outer rigid rings and affixed to the rigid rings. Fluid in the borehole causes the elastomer ring to force the inner rigid ring to contract into tighter contact with the bearing pin and the lubricant between the bearing pin and the rolling cone cutter causes the elastomer ring to force the outer rigid ring to expand into tighter contact with said rolling cone cutter thereby preventing the ingress or egress of fluid and materials.

REFERENCES:
patent: 1884965 (1932-10-01), Baggett et al.
patent: 2187037 (1940-01-01), Kirkpatrick
patent: 3195421 (1965-07-01), Rumsey et al.
patent: 3277797 (1966-10-01), Tyree, Jr.
patent: 3467448 (1969-09-01), Galle
patent: 3612197 (1971-10-01), Motoyama
patent: 3656764 (1972-04-01), Robinson
patent: 3713707 (1973-01-01), Bennett
patent: 3944306 (1976-03-01), Neilson

Affiliated with

Also associated with

Rating

Seal for a rolling cone cutter earth boring bit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Seal for a rolling cone cutter earth boring bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seal for a rolling cone cutter earth boring bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-450378