Title:
METHOD AND APPARATUS FOR MOVING A PISTON
Document Type and Number:
WIPO Patent Application WO1999009291
Kind Code:
A9
Abstract:
An apparatus and method for creating a pulling force on a bottom hole assembly is disclosed. The apparatus comprises a housing (42), a piston (70) having a first section (72) and a second section (78), and a venturi member (110), operatively associated with the piston (70). The housing is attached to a work string and the piston (70) is attached to a bottom hole assembly. The first and second sections of the piston and housing form a first chamber (102) and a second chamber (103). The venturi member (111) contains a first passageway (74) for communicating the zone of low pressure created by the venturi member (111) with the first chamber (102); and a second passageway (74) for communicating the inner diameter of the venturi means (111) with the second chamber (103). The venturi member (111) comprises a nozzle (120) operatively associated with the piston (70); a mixing tuber (93A), formed on the inner diameter of the piston; and, a diffuser section (93B) adjoining the mixing tube.
Inventors:
GAZEWOOD MICHAEL J (US)
Application Number:
PCT/US1998/016665
Publication Date:
July 01, 1999
Filing Date:
August 12, 1998
Export Citation:
Assignee:
GAZEWOOD MICHAEL J (US)
International Classes:
E21B4/18; E21B23/04; (IPC1-7): E21B7/00
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