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:
Oct. 13, 1998
Filed:
Mar. 19, 1996
Terry R Matthias, Longlevens, Gloucestershire, GB;
John Hayward, Minchinhampton, Gloucestershire, GB;
Haydn Richard Lamb, Nr. Tewkesbury Gloucestershire, GB;
Other;
Abstract
In a rotary drag-type drill bit, or other downhole component used in subsurface drilling, bearing pads which engage the surface of the earthen formation of the borehole carry wear-resistant bearing inserts received in sockets in the bearing pad. Each bearing insert includes a preform element of the kind normally used as cutting elements in drag-type drill bits, and having a front facing table of polycrystalline diamond bonded to a less hard substrate. The preform element is orientated so that its front diamond surface is tangential to the surface of the bearing pad, or at a slight angle thereto, so as to provide a highly wear-resistant, but non-aggressive bearing insert. The preform element may be bonded to or partly embedded in a carrier which is received within the socket. The element or carrier may be formed with spaced longitudinal ribs to allow it to be force-fitted into the socket, or the element or carrier may be secured within a hollow sleeve which is formed with such ribs.