Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1997-12-22
2000-05-09
Kramer, Dean J.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
294 8629, 294 8633, 4052231, 405224, 166178, 279 57, E21B 2300
Patent
active
060593369
ABSTRACT:
A connector unit is disclosed which comprises a shaft, a plurality of collet fingers, and a sleeve. The plurality of collet fingers are peripherally positioned against the generally cylindrical outside surface of the shaft adjacent the lower end of the shaft. The sleeve has an upper end, a lower end, and a generally cylindrical inside surface positioned peripherally around the shaft. The sleeve is provided with a radially inwardly extending annular flange extending from its inside surface between its upper end and its lower end which forms a seal with the generally cylindrical outside surface of the shaft. An upper annular chamber is formed between the generally cylindrical outside surface of the shaft and the generally cylindrical inside surface of the sleeve above the radially inwardly extending flange and a lower annular chamber is formed between the generally cylindrical outside surface of the shaft and the generally cylindrical inside surface of the sleeve below the radially inwardly extending flange. The shaft further defines first hydraulic fluid passage opening into the upper hydraulic chamber and a second hydraulic fluid passage opening into the lower hydraulic chamber. Supply of hydraulic fluid through the first hydraulic fluid passage to the upper hydraulic chamber moves the sleeve from a first position in which the collet fingers are in an unlatched position with the lower ends of the collet fingers extending past the lower end of the sleeve to a latched position in which the lower ends of the collet fingers are positioned adjacent an inside surface of the sleeve. Also disclosed is a subsea tool which employs the connector.
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Buskop Wendy K.
Chin Paul
Kramer Dean J.
Kvaernet Oilfield Products
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