Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1984-05-30
1985-12-24
Leppink, James A.
Wells
Valves, closures or changeable restrictors
Fluid operated
166250, 166332, 166334, E21B 3408
Patent
active
045600040
ABSTRACT:
A spherical valve member type having a drill pipe tester valve and a moving apparatus to provide for moving the spherical valve member axially relative to the housing between its said open and closed positions, thereby permitting downward forces exerted upon the spherical valve member in its said closed position due to fluid pressure in the well test string above the spherical valve member, to be transmitted substantially entirely to the housing through the engagement of the downward facing surface of the lower valve seat structure and the upward facing surface of the housing. A latch device is provided for latching the spherical valve member in its closed position as the well test string is lowered into the well and for subsequently releasing the spherical valve member and allowing it to move to its open position when the well test string is finally positioned within the well. A resilient means is provided to prevent movement of the spherical valve member to its open position until a predetermined force is applied to the tester valve. A pressure compensating piston assembly is provided to compensate for the volume decrease of the tester valve during actuation thereof. Upon picking up the well test string the latching device provides a safety valve feature by moving the spherical valve member back to its closed position.
REFERENCES:
patent: Re27464 (1972-08-01), Taylor, Jr.
patent: Re29471 (1977-11-01), Grioux
patent: 3568715 (1968-02-01), Taylor, Jr.
patent: 3856085 (1974-12-01), Holden et al.
patent: 3967647 (1976-06-01), Young
patent: 4009753 (1977-03-01), McGill et al.
patent: 4064937 (1977-12-01), Barrington
patent: 4116272 (1978-09-01), Barrington
patent: 4270610 (1981-06-01), Barrington
patent: 4319633 (1982-03-01), McMahan et al.
patent: 4421172 (1983-12-01), McMahan
patent: 4445571 (1984-05-01), Hushbeck
patent: 4452313 (1984-06-01), McMahan
patent: 4458762 (1984-07-01), McMahan
patent: 4460040 (1984-07-01), Bowyer
patent: 4489786 (1984-12-01), Beck
Winslow Donald W.
Wray Gary Q.
Bagnell David J.
Duzan James R.
Halliburton Company
Leppink James A.
Weaver Thomas R.
LandOfFree
Drill pipe tester - pressure balanced does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill pipe tester - pressure balanced, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill pipe tester - pressure balanced will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1473899