E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/2
E21B 49/00 (2006.01) E21B 33/124 (2006.01)
Patent
CA 1140042
ABSTRACT OF THE DISCLOSURE 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 in- flating 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 operate pump can be monitored at the surface.
354343
Schlumberger Technology Corporation
Smart & Biggar
LandOfFree
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