Impregnated PDC bit

The invention relates to an impregnated PDC bit. The impregnated PDC bit consists of a PDC composite sheet, a diamond-impregnated layer, a matrix, a steel core and a joint, wherein the diamond-impregnated layer, the matrix and the steel core are sintered into a bit body; a flow channel is formed on...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI BAISHENG, FAN SHENGHUA, ZHANG CHONGYAN, HOU QINGYONG, PENG YE, GUAN SHUWEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	The invention relates to an impregnated PDC bit. The impregnated PDC bit consists of a PDC composite sheet, a diamond-impregnated layer, a matrix, a steel core and a joint, wherein the diamond-impregnated layer, the matrix and the steel core are sintered into a bit body; a flow channel is formed on the diamond-impregnated layer and the matrix of the bit body; the PDC composite sheet is soldered in the diamond-impregnated layer or in the diamond-impregnated layer and the matrix; when 0-PDC composite sheet diameter/3 is exposed, the composite sheet stays in a surface impregnated state; the PDC composite sheet covers the crown contour line of the bit; and the joint is connected with the bit body. The impregnated PDC bit not only keeps the advantages of high rate of penetration of PDC bits for shearing and crushing rocks, but also furthest protects the PDC composite sheet by using an impregnated structure. Meanwhile, the diamond-impregnated layer has the functions of plowing, so that the diamond content of the bi