Wells – Packers or plugs – Flow stopping type; e.g. – plug
Patent
1978-09-27
1979-07-17
Leppink, James A.
Wells
Packers or plugs
Flow stopping type; e.g., plug
166125, 285 18, 285DIG23, E21B 2300
Patent
active
041612167
ABSTRACT:
An apparatus is provided for selective mechanically activated latching and fluid activated locking and unlocking of a tubular string within an anchor assembly in a subterranean bore, wherein the anchor assembly has defined thereon co-engaging elements for selectively latching and locking of a tubular string with the anchor assembly. The apparatus comprises a housing which contains second co-engaging means which are complimentarily operational with the first co-engaging means. A longitudinally shiftable sleeve is initially secured to at least one of the housing and the second co-engaging means and is initially positioned with respect to the second co-engaging means whereby the second co-engaging means is selectively and repeatably latchable with respect to the first co-engaging means. A first seat is provided within said shiftable sleeve for sealing receipt of a first sealing element whereby the sleeve is converted to a fluid responsive piston for longitudinal shifting of the sleeve or the second co-engaging means relative to the other of the sleeve and the co-engaging means to a first position whereby the first relative shifting to the first position locks the second co-engaging means with the first co-engaging means. Second seat means for sealing receipt of a second sealing element is provided whereby the sleeve means is again converted to a piston to longitudinally shift either the sleeve means or the co-engaging means relative to the other of the sleeve means and the co-engaging means to a second position to unlock the first and second co-engaging means.
REFERENCES:
patent: 2409811 (1946-10-01), Taylor, Jr. et al.
patent: 3037797 (1962-06-01), Brown
patent: 3051244 (1962-08-01), Litchfield
Baker International Corporation
Leppink James A.
Norvell, Jr. William C.
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