FR2283303A1 - Shut-off valve for borehole - blow-out arrester - Google Patents
Shut-off valve for borehole - blow-out arresterInfo
- Publication number
- FR2283303A1 FR2283303A1 FR7429768A FR7429768A FR2283303A1 FR 2283303 A1 FR2283303 A1 FR 2283303A1 FR 7429768 A FR7429768 A FR 7429768A FR 7429768 A FR7429768 A FR 7429768A FR 2283303 A1 FR2283303 A1 FR 2283303A1
- Authority
- FR
- France
- Prior art keywords
- valve
- pressure
- shut
- valve body
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000002706 hydrostatic effect Effects 0.000 abstract 3
- 239000012530 fluid Substances 0.000 abstract 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
- E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads
- E21B34/045—Valve arrangements for boreholes or wells in well heads in underwater well heads adapted to be lowered on a tubular string into position within a blow-out preventer stack, e.g. so-called test trees
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
In a shut-off valve intended to be lowered on a pipe string into a blow-out valve shaft in the outlet of a borehole, provided in known manner, with (i) a housing with a channel passing through it and a displaceable valve body which opens this channel in a first position and closes it in a second, (ii) a pressure-sensitive operating element connected to a pressure pipe for displacing the valve body to the first position and a closure element which displaces the valve body to the second position on reduction of the pressure in the pressure pipe, the improvement whereby the operating element is exposed to the hydrostatic pressure of the fluid surrounding the housing in order to compensate for the hydrostatic pressure of the fluid in the pressure pipe. More especially, the valve body is constructed as a pivotable ball with a passageway opening which can be brought into line with the channel in the housing. Overcomes problems which exist in known shut-off valves, inter alia the high pressure which must be exerted on the operating piston when the valve is held open to overcome the hydrostatic pressure of the medium surrounding the valve, and the fact that if a cable passing through the valve breaks above the valve, this cannot be shut because the cable cannot be withdrawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7429768A FR2283303A1 (en) | 1974-08-30 | 1974-08-30 | Shut-off valve for borehole - blow-out arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7429768A FR2283303A1 (en) | 1974-08-30 | 1974-08-30 | Shut-off valve for borehole - blow-out arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2283303A1 true FR2283303A1 (en) | 1976-03-26 |
Family
ID=9142718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7429768A Withdrawn FR2283303A1 (en) | 1974-08-30 | 1974-08-30 | Shut-off valve for borehole - blow-out arrester |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2283303A1 (en) |
-
1974
- 1974-08-30 FR FR7429768A patent/FR2283303A1/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |