Automatic lock for telescoping joint of a riser system

An automatic locking mechanism for a telescoping joint for a riser functions in several modes. In an operating mode, the joint is free to have its inner and outer barrels (12, 14) move with respect to each other without engaging each other in a locking relationship. In a second position, the telesco...

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Bibliographische Detailangaben
Hauptverfasser:	SCOTT D WARD, ROGER BOISJOLIE, LAN T NGUYEN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	An automatic locking mechanism for a telescoping joint for a riser functions in several modes. In an operating mode, the joint is free to have its inner and outer barrels (12, 14) move with respect to each other without engaging each other in a locking relationship. In a second position, the telescoping joint locks when it is fully retracted. In a third position, the system locks the inner and outer barrels (12, 14) together to hold them in a fixed position. The inner and outer barrels (12, 14) are locked when a movable sleeve (30) is properly positioned to allow spring-loaded dogs (28) to be biased through windows (32) in the sleeve (30) so as to act as a landing shoulder to catch a groove (20) on the outer barrel (12). By putting the actuating sleeve (30) in a variety of positions, the various modes of the locking assembly can be deployed.