Full bore sampler valve with time delay
Patent
·
OSTI ID:6534169
A downhole tool is described for trapping a fluid sample from a producing formation intersected by a well bore, comprises: a housing assembly having an axial bore therethrough, a portion of the bore being of enlarged diameter; and a tubular mandrel assembly slidably disposed within the housing assembly and longitudinally movable from a first position removed from the enlarged diameter bore portion to a second position spanning the enlarged diameter bore portion and creating at the second position a longitudinally extending annular sample chamber. A method of taking a fluid sample from a producing formation intersected by a well bore, comprising: disposing a testing string including a sampler valve in the well bore; axially flowing the producing formation through the testing string and the sampler valve; and substantially simultaneously creating an annular sample chamber in the sampler valve and trapping a sample of the producing formation flow therein while maintaining an open, substantially unrestricted axial bore through the sampler valve.
- Assignee:
- Halliburton Co., Duncan, OK
- Patent Number(s):
- US 4665983
- OSTI ID:
- 6534169
- Country of Publication:
- United States
- Language:
- English
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