US3786865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockout for well safety valve
Assignee: CAMCO INC US
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Filing: 1973-03-06
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Granted: 1974-01-22
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Expires: 1993-03-06
Abstract
Abstract In a well safety valve for controlling the fluid flow through a well tubing in which the valve closure means is controlled by longitudinal movable tubular member, the improvement of lockout means for locking the valve closure member in the open position by providing a second tubular member axially aligned with the first tubular member and normally positioned below the valve closure member. Means on the second member for moving the second member upwardly for holding the valve closure member open. Holding means for holding the second member in the upward position for locking the valve open. The holding means being releasable for resetting and closing the valve if desired.
Inventors
- 👤 G Tausch
- 👤 F Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/102; E21B2200/00; E21B2200/05; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727; Y10T137/7781; Y10T137/7782
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and having a housing and having a valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the valve closure member, first means for moving the tubular member in a first direction, second means for moving the tubular member in a second direction, the improvement of lockout means for locking the valve closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below the valve closure member, means on the second member for moving the second member upwardly for holding the valve closure member open, and holding means for engaging and holding the second member in the upward position for locking the valve open.
Claim 2
Dependent Claim
149 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and having a housing and having a valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the valve closure member, first means for moving the tubular member in a first direction, second means for moving the tubular member in a second direction, the improvement of lockout means for locking the valve closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below the valve closure member, means on the second member for moving the second member upwardly for holding the valve closure member open, and holding means for engaging and holding the second member in the upward position for locking the valve open.
Claim 3
Dependent Claim
58 words
The apparatus of claim 1 wherein the upper end of the second tubular member is normally positioned to be aDjacent the lower end of the first tubular member when the first tubular member is in its fully extended downward position thereby preventing inadvertent locking out of the valve closure member when the valve is in the open position.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 including releasable holding means for initially holding the second member in the downward position.
Claim 5
Dependent Claim
26 words
The apparatus of claim 1 wherein the means for moving the second member upwardly includes, a tool engaging recess on the interior of the second member.
Claim 6
Dependent Claim
26 words
The apparatus of claim 4 wherein the recess includes beveled edges on the both ends of the recess for preventing accidental acutation of the second member.
Claim 7
Dependent Claim
11 words
The apparatus of claim 1 wherein the holding means is releasable.
Claim 8
Dependent Claim
187 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and including a housing and a valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the valve closure member, spring means for biasing the tubular member in a first direction for closing the valve closure member, a piston and cylinder assembly for moving the first tubular member in a direction for opening the valve closure member, the improvement in lockout means for locking the valve closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below the valve closure member, releasable holding means for initially holding the second member in the downward position, a tool engaging recess on the interior of the second member for moving the second member upwardly for holding the valve closure member open, and locking means between the second member and the housing for locking the second member in the upward position for locking the valve open.
Claim 9
Dependent Claim
187 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and including a housing and a valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the valve closure member, spring means for biasing the tubular member in a first direction for closing the valve closure member, a piston and cylinder assembly for moving the first tubular member in a direction for opening the valve closure member, the improvement in lockout means for locking the valve closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below the valve closure member, releasable holding means for initially holding the second member in the downward position, a tool engaging recess on the interior of the second member for moving the second member upwardly for holding the valve closure member open, and locking means between the second member and the housing for locking the second member in the upward position for locking the valve open.
Claim 10
Dependent Claim
58 words
The apparatus of claim 7 wherein the upper end of the second tubular member is normally postioned to be adjacent the lower end of the first tubular member when the first tubular member is in its fully extended downward position thereby preventing inadvertent locking out of the valve closure member when the valve is in the open position.
Claim 11
Dependent Claim
172 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and including a housing and a flapper valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the flapper valve member, spring means for biasing the tubular member in a direction for closing the flapper closure member, a piston and cylinder assembly for moving the first tubular member in a direction for opening the flapper closure member, the improvement in lockout means for locking the flapper closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below and out of engagement with the flapper closure member, engaging means on the second member for allowing movement of the second member upwardly for engaging and holding the flapper member open, and holding means for engaging and holding the second member in the upward position for holding the valve open.
Claim 12
Dependent Claim
172 words
In a well safety valve for controlling the fluid flow through a well tubing, the valve adapted to be positioned in the well tubing and including a housing and a flapper valve closure member moving between open and closed positions, a first longitudinally movable tubular member for controlling the movement of the flapper valve member, spring means for biasing the tubular member in a direction for closing the flapper closure member, a piston and cylinder assembly for moving the first tubular member in a direction for opening the flapper closure member, the improvement in lockout means for locking the flapper closure member in the open position comprising, a second tubular member axially aligned with the first tubular member and normally positioned below and out of engagement with the flapper closure member, engaging means on the second member for allowing movement of the second member upwardly for engaging and holding the flapper member open, and holding means for engaging and holding the second member in the upward position for holding the valve open.
Claim 13
Dependent Claim
58 words
The apparatus of claim 9 wherein the upper end of the second tubular member is normally positioned to be adjacent the lower end of the first tubular member when the first tubular member is in its fully extended downward position thereby preventing inadvertent locking out of the valve closure member when the valve is in the open position.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |