ABOVE-BIT CENTRALIZER

FIELD: drilling equipment. SUBSTANCE: this relates to devices for centering of drilling tool. Centralizer is component of drilling string lower section and it is intended for preventing clay sticking and thus excluding piston effect. Above-bit centralizer has tubular body with connecting thread at i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KHAKIMOV F.M, KAGARMANOV F.I, SHAJAKHMETOV SH.K, KATEEV R.I
Format:	Patent
Sprache:	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:	FIELD: drilling equipment. SUBSTANCE: this relates to devices for centering of drilling tool. Centralizer is component of drilling string lower section and it is intended for preventing clay sticking and thus excluding piston effect. Above-bit centralizer has tubular body with connecting thread at its ends, and working members installed on its body. Working members are made in the form of disks with slots for passing of circulating flushing fluid. Made in lower disk are flushing passages which are directed upwards into slots of upper disk and they are connected with body inner space. Passages of disks are located at angle of 120 deg. to each other. Installed at outlet of each of aforesaid passages are ejection head-pieces. EFFECT: higher efficiency. 2 cl, 2 dwg$