Downhole tool with compressible well fluid chamber
Patent
·
OSTI ID:5513229
A downhole tool apparatus is described which consists of: a housing, having a compression chamber defined therein, and having a fill passage means disposed through the housing for placing the compression chamber in open flow fluid communication with a well annulus exterior of the housing so that well fluid may flow into the compression chamber as the apparatus is lowered into a well; an isolation valve means for selectively closing the fill passage means and for thereby trapping the well fluid in the compression chamber; an operating element disposed in the housing; an actuating piston means slidably disposed in the housing, the actuating piston means being operably associated with the operating element so that the operating element is operated in response to movement of the actuating piston means relative to the housing; a bypass passage means disposed through the housing for communicating a flow passage of the housing with the well annulus exterior of the housing; a bypass valve means for selectively closing the bypass passage means; wherein the actuating piston means and the housing are so arranged and constructed that movement of the actuating piston means between first and second positions thereof relative to the housing decreases a volume of the compression chamber and of any well fluid trapped therein.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4595060
- OSTI ID:
- 5513229
- Country of Publication:
- United States
- Language:
- English
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