Hardmetal facing for earth boring drill bit

Details Hardmetal facing for earth boring drill bit Hardmetal facing for earth boring drill bit

1997-07-31

1999-11-23

Schoeppel, Roger

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175425, 428557, 75240, E21B 1050

Patent

active

059883022

ABSTRACT:
A steel tooth rolling cutter earth boring drill bit includes a bit body with a threaded upper end for attachment to the end of a drill string, and a lower end including three legs extending downwardly from the bit body and with a rolling cutter rotatably mounted on each leg. A layer of wear resistant material is applied to a portion of each rolling cutter and comprises wear resistant particles in a substantially steel matrix. The steel matrix is integrally formed with the cutter in a rapid, solid state densification powder metallurgy (RSSDPM) process, and includes a duplex microstructure comprising from about 10 to 40 volume percent austenite and from about 60 to 90 volume percent martensite. The duplex microstructure may be achieved by incorporating a minor fraction of pure nickel and/or manganese powder in the powder mix used in the process, thereby providing nickel or manganese enrichment of the austenitic zones of the matrix.

REFERENCES:
patent: 3800891 (1974-04-01), White et al.
patent: 4554130 (1985-11-01), Ecer
patent: 4562892 (1986-01-01), Ecer
patent: 4592252 (1986-06-01), Ecer
patent: 4630692 (1986-12-01), Ecer
patent: 4726432 (1988-02-01), Scott et al.
patent: 4836307 (1989-06-01), Keshavan et al.
patent: 4930675 (1990-06-01), Bedford et al.
patent: 5653229 (1997-08-01), Sreshta et al.

Affiliated with

Also associated with

Rating

Hardmetal facing for earth boring drill 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 Hardmetal facing for earth boring drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hardmetal facing for earth boring drill bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1210547