US3887007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer zone activated valve
Assignee: Dresser Industries Inc
•
Filing: 1974-10-11
•
Granted: 1975-06-03
•
Expires: 1994-10-11
Abstract
Abstract A sliding valve located in the lower end of a packer assembly utilize two differential pressure areas for receiving hydraulic pressure from inside the tubing to actuate the packer and then selectively receiving formation pressure when it exceeds the casing pressure and using the higher formation pressure to maintain the packer set in the casing.
Inventors
- 👤 David Lewis Abney
- 👤 Robert Carl Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:18
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A valve assembly for selectively applying the higher of two available fluid pressures to a well packer assembly, said two fluid pressures arising in the internal bore passage of the tubing string attached to said well packer assembly and the formation pressure below said well packer assembly; said valve assembly comprising: inner mandrel means having an internal bore passage communicating through said packer assembly to the tubing string above said packer assembly; outer housing means located concentrically about said inner mandrel means and forming an annular passage therebetween; first port means between said inner mandrel means internal bore passage and said annular passage; second port means in said housing means between said annular passage and the well formation; and, valve member means in said annular passage responsive to fluidic pressure from said first and second port means and adapted to move in response to the higher of said two pressures to block the port means communicating the lower of said pressures.
Claim 2
Dependent Claim
161 words
A valve assembly for selectively applying the higher of two available fluid pressures to a well packer assembly, said two fluid pressures arising in the internal bore passage of the tubing string attached to said well packer assembly and the formation pressure below said well packer assembly; said valve assembly comprising: inner mandrel means having an internal bore passage communicating through said packer assembly to the tubing string above said packer assembly; outer housing means located concentrically about said inner mandrel means and forming an annular passage therebetween; first port means between said inner mandrel means internal bore passage and said annular passage; second port means in said housing means between said annular passage and the well formation; and, valve member means in said annular passage responsive to fluidic pressure from said first and second port means and adapted to move in response to the higher of said two pressures to block the port means communicating the lower of said pressures.
Claim 3
Dependent Claim
161 words
A valve assembly for selectively applying the higher of two available fluid pressures to a well packer assembly, said two fluid pressures arising in the internal bore passage of the tubing string attached to said well packer assembly and the formation pressure below said well packer assembly; said valve assembly comprising: inner mandrel means having an internal bore passage communicating through said packer assembly to the tubing string above said packer assembly; outer housing means located concentrically about said inner mandrel means and forming an annular passage therebetween; first port means between said inner mandrel means internal bore passage and said annular passage; second port means in said housing means between said annular passage and the well formation; and, valve member means in said annular passage responsive to fluidic pressure from said first and second port means and adapted to move in response to the higher of said two pressures to block the port means communicating the lower of said pressures.
Claim 4
Dependent Claim
161 words
A valve assembly for selectively applying the higher of two available fluid pressures to a well packer assembly, said two fluid pressures arising in the internal bore passage of the tubing string attached to said well packer assembly and the formation pressure below said well packer assembly; said valve assembly comprising: inner mandrel means having an internal bore passage communicating through said packer assembly to the tubing string above said packer assembly; outer housing means located concentrically about said inner mandrel means and forming an annular passage therebetween; first port means between said inner mandrel means internal bore passage and said annular passage; second port means in said housing means between said annular passage and the well formation; and, valve member means in said annular passage responsive to fluidic pressure from said first and second port means and adapted to move in response to the higher of said two pressures to block the port means communicating the lower of said pressures.
Claim 5
Dependent Claim
74 words
The valve assembly of claim 1 wherein said valve member means further cOmprises a cylindrical piston sleeve having first and second differential pressure areas thereon adapted to receive hydraulic pressure from said first and second port means respectively: said piston sleeve having seal means thereon; and, said valve assembly further comprising abutment means between said piston sleeve and said inner mandrel means arranged to limit movement of said piston sleeve in said annular passage.
Claim 6
Dependent Claim
77 words
The valve assembly of claim 2 further comprising first and second fluid bypass means; said first bypass means arranged to allow fluid flow from said first port means, through said piston sleeve to said annular passage; and said second bypass means adapted to allow fluid flow from said second port means, around said piston sleeve to said annular passage; said piston sleeve arranged to allow fluid flow through only one of said bypass means at a time.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |