Rotary drill bit, parts therefor, and method of manufacturing th

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

175411, 175374, E21B 1046, E21B 1050, E21B 1052

Patent

active

045950679

ABSTRACT:
A roller cutter for a rotary drill bit comprising a conical roller cutter body of metal, and a plurality of cutting elements secured to the outer surface of the roller cutter body primarily by welding and being substantially free of mechanical interconnection to the roller cutter body. Each cutting element is an elongate member having a base portion at one end thereof engageable with the roller cutter body and a tip portion at the other end thereof engageable with the formation to be drilled for drilling the formation. The element is formed of a material at its tip portion which has relatively high compressive strength and good wear resistance properties, but which also has a coefficient of thermal expansion and elastic moduli significantly different from those of the metal of the cutter body thereby rendering it incapable of being satisfactorily welded thereto, and being formed of a material at its base portion which has a coefficient of expansion and elastic moduli similar to those of the metal of the cutter body thereby enabling it to be welded thereto. The cutting elements are formed of a composite material having first and second phases, with the volume fractions of these phases varying in a generally continuous composition gradient along the length thereof. In addition, a drag type drill bit, and a method of manufacturing the roller cutter and the drag bit are disclosed.

REFERENCES:
patent: 2687875 (1951-03-01), Morlan et al.
patent: 3599737 (1971-08-01), Fischer
patent: 4078713 (1978-03-01), Marshall
patent: 4105263 (1978-08-01), Sorensen et al.
patent: 4168923 (1979-09-01), Vezirian
patent: 4190127 (1980-02-01), Wolf
patent: 4339009 (1982-07-01), Busby
patent: 4372404 (1983-02-01), Drake
patent: 4381825 (1983-05-01), Padtke
patent: 4453605 (1984-06-01), Short, Jr.
patent: 4484644 (1984-11-01), Cook et al.
patent: 4520881 (1985-06-01), Phaal

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Rotary drill bit, parts therefor, and method of manufacturing th does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary drill bit, parts therefor, and method of manufacturing th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drill bit, parts therefor, and method of manufacturing th will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2268603

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.