Hydraulically actuated downhole valve apparatus
This patent describes well control apparatus including a valve device with an upper and lower marginal end connected to an elongated tubing means and positioned downhole in a borehole for conducting fluid flow from a lower part of the borehole to the surface of the ground, a packer device associated with the valve device which divides the borehole into an upper and a lower annulus, means placing the upper marginal end of the valve device in communication with the upper borehole annulus and the lower marginal end of the valve device is in communication with the lower borehole annulus. It comprises: an outer annular housing, an annular mandrel slidably received within the housing; a power chamber formed between the mandrel and the housing, a power piston attached to the mandrel and slidably received with the power chamber; means for effecting annulus pressure within the upper variable chamber; latch means by which the mandrel is latched into a plurality of different vertically spaced latch positions as the mandrel is moved respective to the housing, pressure responsive means by which the latch means is released when the upper annulus pressure is increased to a first magnitude of pressure.
- Assignee:
- Halliburton Co., Duncan, OK (United States)
- Patent Number(s):
- US 5156207; A
- Application Number:
- PPN: US 7-700994
- OSTI ID:
- 6781392
- Country of Publication:
- United States
- Language:
- English
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