E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/44
E21B 34/10 (2006.01) E21B 33/076 (2006.01) E21B 34/04 (2006.01) E21B 34/00 (2006.01)
Patent
CA 1200195
TITLE: LUBRICATOR VALVE APPARATUS ABSTRACT OF THE DISCLOSURE A lubricator valve assembly comprises a reciprocably rotatable ball valve which is operated between open and closed positions solely through the selective application of control pressures and/or tubing pressure above the valve to a double acting sleeve type actuating piston. One end of the actuating piston has a valving piston formed thereon which cooperates with seal bore in the housing to effect the opening or closing of a bypass fluid passage extending from a region below the ball valve to a region above the ball valve. Such valving piston also functions as part of a lost motion connection between the actuating sleeve piston and a reciprocable actuator for rotating the ball valve. In opening the ball valve, the valving piston first moves upwardly to establish a fluid bypass around the closed ball valve and then establishes contact with the actuator to rotate the ball valve to an open position. The same fluid bypass may be utilized to pump through fluid around the closed ball valve by applying fluid pressure above the ball valve. Improved sealing elements for the ball valve are also provided.
450978
Baker Oil Tools Inc.
Borden Ladner Gervais Llp
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