Bottom hole shut-in tool
Patent
·
OSTI ID:6229064
A bottom hole shut-in tool is described for preventing fluid flow in tubing extending within a fluid wel bore, comprising: a concave arcuate seat in a portion of the tubing, the arcuate seat surrounding a fluid passageway; a valve body having a convex arcuate lower end portion substantially conforming in shape to that of the arcuate seat; the arcuate lower end portion of the valve body being comprised of an elastomeric material adapted to seal against fluid flow through the passageway when engaged with the arcuate seat; a probe extending downwardly from the valve body and into the fluid passageway, the valve body and the probe containing aligned bores through which fluid may flow; the valve body containing a cavity connecting with the bore in the valve body, the valve body further including pressure equalizing valve means in the cavity; and the valve body further containing at least one aperture connecting the cavity with the space between the valve body and the tubing, the pressure equalizing valve means comprising plug means for blocking fluid flow from the cavity to the apertures, the cavity containing a concave arcuate seat portion surrounding the bore in the valve body and the plug means having a convex arcuate lower end portion substantially conforming in shape to that of the arcuate seat portion of the cavity.
- Assignee:
- Marathon Oil Co., Findlay, OH
- Patent Number(s):
- US 4804042
- OSTI ID:
- 6229064
- Country of Publication:
- United States
- Language:
- English
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