High speed well working apparatus

Disclosed is a rig for working on wells, and including a pair of continuous chains for moving a pair of pipe holders along a mast. Each of the two pipe holders is fixed to a point in each chain. The chains are driven along parallel paths by twin motors with linked drive shafts. The motors are mounte...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BROWN, JOE R
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:	Disclosed is a rig for working on wells, and including a pair of continuous chains for moving a pair of pipe holders along a mast. Each of the two pipe holders is fixed to a point in each chain. The chains are driven along parallel paths by twin motors with linked drive shafts. The motors are mounted on the top of the mast so that only one side of the closed loop on each chain is loaded when the pipe is being pulled from a well. One of the pipe holders may comprise a snubbing head which may be operated in reciprocal motion for high speed snubbing of pipe into a well.