E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/70
E21B 10/48 (2006.01)
Patent
CA 1252459
Abstract of the Disclosure A characteristic feature of the present invention resides in that the diamond-impregnated layer of the drilling bit matrix is shaped as a parallelepiped having its front and rear faces inclined while the insert is shaped as a triangular prism, one of whose side faces is rigidly coupled to the weld-on layer, and the face, to the inclined rear face of the diamond-impregnated layer.
499985
Abdrazakov Ravil S.
Aubakirov Marat T.
Buzdov Ruslan D.
Khashirov Vladislav K.
Khazhuev Vladimir S.
Kazakhsky Politekhnichesky Institut Imeni V.i.lenina
Marks & Clerk
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