Apparatus and method for stripping solids and fluids from a string used in drilling or servicing wells

A seal for replacement within a generally cylindrical passage of a supporting body has three or more overlapping sealing members arranged circumferentially around the passage in the supporting body and forming an annular seal around the pipe inserted into the passage. The sealing members are configu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Greenwood, Dallas, Holtby, Quinn A. J
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:	A seal for replacement within a generally cylindrical passage of a supporting body has three or more overlapping sealing members arranged circumferentially around the passage in the supporting body and forming an annular seal around the pipe inserted into the passage. The sealing members are configured to accommodate an expansion of the pipe by moving to an expanded position by circumferential sliding contact of the sealing members along circumferentially slanted cuts between the sealing members.