US3786866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockout for well safety valve
Assignee: CAMCO INC US
•
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 a longitudinal movable tubular member, the improvement of a lockout means for locking the valve closure member in the open position by providing a second tubular member telescoping with the first tubular member and initially secured thereto. Means for preventing inadvertently locking out the valve while the valve is in the open position. Tool engaging means on the second telescoping section for moving the second section downwardly for opening the valve closure member, and holding means for engaging the second section downwardly for locking the valve open. The holding means may include coacting ratchet teeth between the first and second tubular sections and may be releasable if desired. Or the holding means may include coacting ratchet means between the second section and the valve housing. Tool engaging means may be provided on both the first and second sections for moving the second section downwardly by engaging only the tool engaging means on the second section. Or the second section may be moved downwardly by a tool engaging both the first and second sections and moving the first and second sections apart.
Inventors
- 👤 G Tausch
- 👤 F Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/102; E21B34/103; 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: 16
Claim 1
Independent Claim
144 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 valve closure member moving between open and closed positions, a 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 in lockout means for locking the valve closure member in the open position comprising, said tubular member including first and second telescoping sections, releasable means initially securing the telescoping sections together, tool engaging means on the second telescoping section for moving said second section downwardly for opening the valve closure member, and holding means for engaging the second section for holding the second section downwardly and locking said valve open.
Claim 2
Dependent Claim
144 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 valve closure member moving between open and closed positions, a 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 in lockout means for locking the valve closure member in the open position comprising, said tubular member including first and second telescoping sections, releasable means initially securing the telescoping sections together, tool engaging means on the second telescoping section for moving said second section downwardly for opening the valve closure member, and holding means for engaging the second section for holding the second section downwardly and locking said valve open.
Claim 3
Dependent Claim
65 words
The apparatus of claim 1 wherein the second section is connected to the lower part of the first section, and one of the means for moving the tubular member including a piston and cylinder assembly including coacting seals, but in Which the seals are positioned out of engagement with the second section whereby said second section may be easily moved downwardly without binding in seals.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1 wherein the holding means includes coacting ratchet teeth between the first and second sections.
Claim 5
Dependent Claim
11 words
The apparatus of claim 3 wherein the holding means is releasable.
Claim 6
Dependent Claim
48 words
The apparatus of claim 1 wherein said valve includes a shoulder positioned below the closure member and adjacent the bottom of the downward extent of travel of the tubular member whereby said second section will not be inadvertently moved to the lockout position while the valve is open.
Claim 7
Dependent Claim
21 words
The apparatus of claim 1 wherein the holding means includes coacting ratchet means between the second section and the valve housing.
Claim 8
Dependent Claim
18 words
The apparatus of claim 1 including tool engaging means on the first section for moving the sections apart.
Claim 9
Dependent Claim
22 words
The apparatus of claim 7 wherein the tool engaging means on the first and second sections include a recess in each section.
Claim 10
Dependent Claim
40 words
The apparatus of claim 2 including a normally closed passageway leading from the communication with the cylinder to the interior of the valve housing, and a sliding sleeve positioned internally of the housing for opening said passageway on longitudinal movement.
Claim 11
Dependent Claim
16 words
The apparatus of claim 1 wherein the second section is positioned internally of the first section.
Claim 12
Dependent Claim
191 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 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 opening the valve closure member, a piston and cylinder assembly including coacting seals for receiving fluid for moving the tubular member in a direction for closing the valve closure member, the improvement in lockout means for locking the valve closure member in the open position comprising, said tubular member including first and second telescoping sections, said second section telescoping internally of the first section and positioned out of engagement with said seals, releasable means initially securing the telescoping sections together, a tool engaging recess positioned on the interior of the second section for moving said second section downwardly for opening the valve closure member, and holding means for engaging the second section for holding the second section in a downward position and locking said valve open.
Claim 13
Dependent Claim
191 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 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 opening the valve closure member, a piston and cylinder assembly including coacting seals for receiving fluid for moving the tubular member in a direction for closing the valve closure member, the improvement in lockout means for locking the valve closure member in the open position comprising, said tubular member including first and second telescoping sections, said second section telescoping internally of the first section and positioned out of engagement with said seals, releasable means initially securing the telescoping sections together, a tool engaging recess positioned on the interior of the second section for moving said second section downwardly for opening the valve closure member, and holding means for engaging the second section for holding the second section in a downward position and locking said valve open.
Claim 14
Dependent Claim
19 words
The apparatus of claim 11 wherein the holding means includes coacting engaging means between the first and second sections.
Claim 15
Dependent Claim
21 words
The apparatus of claim 11 wherein the holding means includes coacting engaging means between the second section and the valve housing.
Claim 16
Dependent Claim
49 words
The apparatus of claim 11 wherein said valve includes a shoulder positioned below the closure member and the adjacent the bottom of the downward extent of travel of the tubular member whereby said second section will not be inadvertently moved to the lockout position while the valve is open.
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 |