The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 1989
Filed:
Mar. 16, 1988
Applicant:
Inventors:
William J Salesky, Irvine, CA (US);
Bruce L Campbell, Pleasant Grove, UT (US);
Assignee:
Smith International, Inc., Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
175329 ; 51309 ; 175374 ; 175410 ; 175414 ;
Abstract
The present invention is a rock bit insert including a polycrystalline diamond surface on an insert body having a head portion made from a material with elasticity and thermal expansion properties advantageously tailored for use in three types of rock bits, as well as the three types of rock bits made with such inserts. The three types of bits are a roller cone rock bit adapted to be used with mud as the drilling fluid, a roller cone rock bit adapted to be used with air as the drilling fluid, and a percussion rock bit.
Published as:
US4811801A; IE890394L; WO8908727A1; NO894552D0; ZA891184B; NO894552L; EP0357723A1; EP0357723A4; JPH02503454A; CA1304736C; IE62492B1; NO178273B; NO178273C;