Patent US4215748A successfully refreshed from Google Patents.
US4215748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockout for a well injection valve
Assignee: Camco International Inc
•
Filing: 1979-01-11
•
Granted: 1980-08-05
•
Expires: 1999-01-11
Abstract
Abstract A lockout for use with a fluid injection valve which injects fluids in a tubing string of a well. The lockout, when actuated, holds the injection valve open for allowing passage of well tools therethrough; but when deactuated, allows the injection valve to operate normally. In combination with a spring-loaded, normally closed injection valve, which is opened by pressure actuating a flow tube in response to injection flow, of a lockout having a second flow tube coaxially aligned with the first flow tube for engagement therewith, piston means connected to the second flow tube and adapted to be actuated by fluid pressure from the well surface for moving the second flow tube against the first flow tube for holding the injection valve open, and a biasing spring acting against the second flow tube for moving the second flow tube away from the first flow tube whereby the injection valve may operate normally and independently of the lockout.
Inventors
- 👤 Clare A. Pace
- 👤 Ronald E. Pringle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:16
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/105; E21B2200/00; E21B2200/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
In combination with an injection valve for injecting fluids in the tubing string of a well and which is opened by pressure actuating a flow tube in response to injection flow in which the flow tube is spring biased towards the closed position, of a valve lockout comprising, a second flow tube coaxially aligned with the first flow tube for engagement therebut but unconnected thereto, piston means connected to the second flow tube and adapted to be actuated by fluid pressure from the well surface for moving the second flow tube against the first flow tube for holding the injection valve open, and biasing means acting against the second flow tube for moving the second flow tube away from the first flow tube whereby the injection valve may operate normally.
Claim 2
Dependent Claim
130 words
In combination with an injection valve for injecting fluids in the tubing string of a well and which is opened by pressure actuating a flow tube in response to injection flow in which the flow tube is spring biased towards the closed position, of a valve lockout comprising, a second flow tube coaxially aligned with the first flow tube for engagement therebut but unconnected thereto, piston means connected to the second flow tube and adapted to be actuated by fluid pressure from the well surface for moving the second flow tube against the first flow tube for holding the injection valve open, and biasing means acting against the second flow tube for moving the second flow tube away from the first flow tube whereby the injection valve may operate normally.
Claim 3
Dependent Claim
186 words
The combination of a temporary lockout with an injection valve for use in the tubing string of a well comprising, a housing, a valve element in the housing, a first tube longitudinally movable in the housing for controlling the actuation of the valve element, pressure differential means connected to the first tube and responsive to injection flow in the housing for moving the tube in a direction for moving the valve element to the open position, first biasing means connected to the first tube for moving the tube in a direction for allowing the valve element to move to the closed position, a second tube movable in the housing and coaxially aligned with and positioned above the first tube for engagement therewith, piston means in the housing engaging the second tube and adapted to be actuated by hydraulic pressure from the well surface for moving the second tube against the first tube for holding the valve element in the open position, and biasing means acting against the second flow tube for moving the second tube away from the first tube whereby the valve may operate normally.
Claim 4
Dependent Claim
186 words
The combination of a temporary lockout with an injection valve for use in the tubing string of a well comprising, a housing, a valve element in the housing, a first tube longitudinally movable in the housing for controlling the actuation of the valve element, pressure differential means connected to the first tube and responsive to injection flow in the housing for moving the tube in a direction for moving the valve element to the open position, first biasing means connected to the first tube for moving the tube in a direction for allowing the valve element to move to the closed position, a second tube movable in the housing and coaxially aligned with and positioned above the first tube for engagement therewith, piston means in the housing engaging the second tube and adapted to be actuated by hydraulic pressure from the well surface for moving the second tube against the first tube for holding the valve element in the open position, and biasing means acting against the second flow tube for moving the second tube away from the first tube whereby the valve may operate normally.
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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |