E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/69
E21B 10/00 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)
Patent
CA 1248939
AN EXPOSED POLYCRYSTALLINE DIAMOND MOUNTED IN A MATRIX BODY DRILL BIT ABSTRACT OF THE DISCLOSURE A polycrystalline diamond body is securely retained on the surface of a matrix body bit while being substantially exposed and unsupported above the matrix surface by partial, unsupported disposition of the diamond body below the surface of the matrix material in such a manner that at least two locking points on the diamond body and between the diamond body and matrix material are established. More particularly, depending upon the geometric shape of the diamond body, the diamond body is disposed within the matrix material and extends above the surface of the matrix material by at least 50% of the volume of the diamond and at an orientation such that one or more sides or surfaces of the diamond body are inclined with respect to the normal to the surface of the matrix material, so that when the matrix material is molded about the inclined surfaces of the diamond body a locking wedge is formed thereover. -1-
475707
Carroll Jimmy L.
Grappendorf Richard H.
Meskin Alexander K.
Eastman Christensen Company
Gowling Lafleur Henderson Llp
LandOfFree
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