US2011067930A1PendingUtilityA1

Enhanced secondary substrate for polycrystalline diamond compact cutting elements

39
Individually held — no corporate assignee on recordPriority: Sep 22, 2009Filed: Sep 20, 2010Published: Mar 24, 2011
Est. expirySep 22, 2029(~3.2 yrs left)· nominal 20-yr term from priority
Inventors:Timothy P. Beaton
E21B 10/573B24D 99/005
39
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A cutting structure for a drill bit includes a diamond table affixed to one end of a first substrate. A second substrate is affixed to the other end of the first substrate. The second substrate is made from a different material than the first substrate. The first and second substrates are substantially coaxial.

Claims

exact text as granted — not AI-modified
1 . A cutting structure for a drill bit, comprising:
 a diamond table affixed to one end of a first substrate; and   a second substrate affixed to the other end of the first substrate, the second substrate made from a different material than the first substrate, the first and second substrates being substantially coaxial.   
     
     
         2 . The cutting structure of  claim 1  wherein the diamond table comprises polycrystalline diamond and the first substrate comprises tungsten carbide. 
     
     
         3 . The cutting structure of  claim 1  wherein the second substrate comprises a material composition having higher abrasion resistance proximate a periphery thereof and higher strength proximate a center thereof. 
     
     
         4 . The cutting structure of  claim 1  wherein the second substrate comprises an erosion resistant outer layer. 
     
     
         5 . The cutting structure of  claim 4  wherein the erosion resistant outer layer is disposed except on portions of the second substrate to be affixed to a bit body. 
     
     
         6 . The cutting structure of  claim 4  wherein the erosion resistant outer layer comprises thermally stable polycrystalline diamond. 
     
     
         7 . The cutting structure of  claim 1  wherein the second substrate comprises steel. 
     
     
         8 . The cutting structure of  claim 1  wherein a material composition of the first substrate is substantially uniform. 
     
     
         9 . The cutting structure of  claim 1  wherein the second substrate comprises a material composition having higher abrasion resistance proximate a first longitudinal end thereof and higher strength proximate a second longitudinal end thereof. 
     
     
         10 . The cutting structure of  claim 1  wherein the second substrate material comprises thermally stable polycrystalline diamond. 
     
     
         11 . A drill bit, comprising:
 a bit body; and   at least one polycrystalline diamond compact cutter affixed to the bit body, the cutter comprising at least
 a diamond table affixed to one end of a first substrate and 
 a second substrate affixed to the other end of the first substrate, the second substrate made from a different material than the first substrate, the first and second substrates being substantially coaxial. 
   
     
     
         12 . The drill bit of  claim 11  wherein the diamond table comprises polycrystalline diamond and the first substrate comprises tungsten carbide. 
     
     
         13 . The drill bit of  claim 11  wherein the second substrate comprises a material composition having higher abrasion resistance proximate a periphery thereof and higher strength proximate a center thereof. 
     
     
         14 . The drill bit of  claim 11  wherein the second substrate comprises an erosion resistant outer layer. 
     
     
         15 . The drill bit of  claim 14  wherein the erosion resistant outer layer is disposed except on portions of the second substrate to be affixed to a bit body. 
     
     
         16 . The drill bit of  claim 14  wherein the erosion resistant outer layer comprises thermally stable polycrystalline diamond. 
     
     
         17 . The drill bit of  claim 14  wherein the second substrate comprises steel. 
     
     
         18 . The drill bit of  claim 11  wherein a material composition of the first substrate is substantially uniform. 
     
     
         19 . The drill bit of  claim 11  wherein the second substrate comprises a material composition having higher abrasion resistance proximate a first longitudinal end thereof and higher strength proximate a second longitudinal end thereof. 
     
     
         20 . The drill bit of  claim 10  wherein the bit body comprises a material affixable to the second substrate by welding. 
     
     
         21 . The drill bit of  claim 19  wherein the bit body comprises steel. 
     
     
         22 . The drill bit of  claim 11  wherein the second substrate material comprises thermally stable polycrystalline diamond.

Join the waitlist — get patent alerts

Track US2011067930A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.