Wells – With eduction pump or plunger – With packer or plug
Patent
1979-12-14
1982-03-23
Leppink, James A.
Wells
With eduction pump or plunger
With packer or plug
166187, E21B 4300, E21B 33127
Patent
active
043208002
ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a drill stem testing apparatus that utilizes upper and lower inflatable packer elements to isolate an interval of the borehole includes a unique pump system that is adapted to supply fluids under pressure to the respective elements in response to manipulation of the pipe string extending to the surface. The pump system includes a first pump assembly that is operated in response to rotation of the pipe string for inflating the lower packer element, and a functionally separate second pump assembly that is operated in response to vertical movement of the pipe string for inflating the upper packer element. The rotationally operated pump assembly is uniquely designed to limit the inflation pressure that is supplied to the lower packer, whereas the inflation pressure generated by the vertically operated pump can be monitored at the surface.
REFERENCES:
patent: 2863511 (1958-12-01), Moosman
patent: 3308887 (1967-03-01), Nutter
patent: 3439740 (1969-04-01), Conouer
patent: 3712758 (1973-01-01), Lech et al.
patent: 3876000 (1975-04-01), Nutter
patent: 3876003 (1975-04-01), Kisling
patent: 3926254 (1975-12-01), Evans
Leppink James A.
Schlumberger Technology Corporation
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