Well tool with selective bypass functions

Details Well tool with selective bypass functions Well tool with selective bypass functions

1984-09-12

1986-04-15

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

166145, 166237, 166242, E21B 3412

Patent

active

045821402

ABSTRACT:
A downhole tool such as a formation tester valve which provides a bypass while allowing a choice of several possible functions of this bypass to be made by rearrangement of the parts of the tool. In a first arrangement, a bypass is provided which is open while the tool is run into the well, and is then closed and latched closed upon operation of the tool by setting down weight on the tool. Subsequent reopening of the tool does not reopen the bypass. In a second arrangement, an open bypass is provided as the tool is run into the well. The bypass again is closed when weight is set down on the tool to operate the tool, but in the second arrangement, the bypass reopens when weight is picked up to reopen the tool. In a third arrangement, the bypass port may be eliminated when it is desired to run the tool without a bypass.

REFERENCES:
patent: 2740479 (1956-04-01), Schwegman
patent: 3066738 (1962-12-01), Myers
patent: 3351133 (1967-07-01), Clark, Jr. et al.
patent: 3361207 (1968-01-01), Chenoweth
patent: 4319633 (1982-03-01), McMahan et al.
patent: 4350205 (1982-09-01), Goldschild et al.

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