04320800 is referenced by 37 patents and cites 7 patents.

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.

Inflatable packer drill stem testing system
Application Number
Publication Number
Application Date
December 14, 1979
Publication Date
March 23, 1982
James M Upchurch
Sugar Land
Schlumberger Technology Corporation
E21B 33/127
E21B 43/00
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