Packer bypass
Patent
·
OSTI ID:6882311
A packer bypass apparatus is described for use in a testing string having a pump in an upper testing string portion and a packer in a lower testing string portion. The bypass apparatus consists of: a case adapted for attachment to the lower testing string portion and having a longitudinally central opening therethrough with at least one transverse port therein; an inner flow tube disposed in the central opening of the case such that the case and the flow tube define a substantially annular flow passageway therebetween in communication with the packer; a bypass mandrel reciprocably disposed in the flow passageway and movable between an open and a closed position, the mandrel defining a bypass passageway therein for providing communication between the flow passageway and a well annulus when in the open position; a piston having an upper portion adapted for attachment to the upper testing string portion and a lower portion disposed in the flow passageway above the mandrel and reciprocable between a first position and a second position; and latching means on the lower portion of the piston for latchingly engaging the mandrel in the closed position when the piston is moved to the second position, whereby the mandrel may be moved from the closed position to the open position as the piston is moved from the second position to the first position.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4756364
- OSTI ID:
- 6882311
- Country of Publication:
- United States
- Language:
- English
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