Downhole inflatable packer pump and testing apparatus
A downhole pump is described comprising: case means attachable to a lower testing string portion and defining a pumping chamber therein; mandrel means connectable to an upper testing string portion for mutual rotation therewith and rotatable within the case means. The mandrel means comprises cam means thereon and the case means and the mandrel means defining a piston chamber therebetween; piston means disposed in the piston chamber and having cam follower means thereon for following the cam means and reciprocating the piston means with respect to the case means in response to rotation of the mandrel means with respect to the case means; diaphragm means sealingly positioned between the piston chamber and the pumping chamber and preventing fluid communication therebetween, whereby fluid movement in the pumping chamber is responsive to fluid movement in the piston chamber and; pressure equalizing means for equalizing a hydrostatic fluid pressure in the pumping chamber with a hydrostatic fluid pressure in the piston chamber.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4706746
- OSTI ID:
- 5863399
- Country of Publication:
- United States
- Language:
- English
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