Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1998-06-03
2000-08-15
Suchfield, George
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166317, 166319, E21B 3410
Patent
active
061021261
ABSTRACT:
A circulation valve is disclosed for use in a tubing-conveyed tool string. The valve is adapted to be open as the tool string is run into the well, enabling circulation flow from the tubing into the well bore. To close the valve, the circulation flow rate is increased. The valve has a housing with an inner bore and defining both a passage in hydraulic communication with the tubing and a side port for hydraulic communication between the passage and the well. A piston disposed within the inner bore of the housing is adapted to be moved along the inner bore of the housing by elevated tubing pressure to block the side port of the housing. A set of shear pins retain the piston in its initial position until broken by the elevated tubing pressure. The piston defines a side port for hydraulic communication between the passage and the side port of the housing with the piston in its initial position, the size of the side port being selected to cause a sufficient pressure buildup within the tubing at a predetermined flow rate to shear the pins and move the piston. Some embodiments have an air chamber between the piston and housing. Methods of use are also disclosed.
REFERENCES:
patent: 4008760 (1977-02-01), DeMoss
patent: 4324293 (1982-04-01), Hushbeck
patent: 4513764 (1985-04-01), Yonker
patent: 4534414 (1985-08-01), Pringle
patent: 4651827 (1987-03-01), Helderle et al.
patent: 4657082 (1987-04-01), Ringgenberg
patent: 4771831 (1988-09-01), Pringle et al.
patent: 5181569 (1993-01-01), McCoy et al.
patent: 5609178 (1997-03-01), Hennig et al.
patent: 5873414 (1999-02-01), Von Gynz-Rekowski
Description of FLUP valve (undated).
Description of RSCV valve (undated).
Babineau James W.
Edwards A. Glen
Huber Klaus B.
Schlumberger Technology Corporation
Suchfield George
LandOfFree
Pressure-actuated circulation valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure-actuated circulation valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-actuated circulation valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1997357