Patent US3763933A successfully refreshed from Google Patents.
US3763933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable safety valve
Assignee: Hydril LLC
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Filing: 1971-04-06
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Granted: 1973-10-09
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Expires: 1991-04-06
Abstract
Abstract A new and improved subsurface safety valve which is inserted into well tubing without requiring removal of the tubing, and which replaces worn, deteriorated and fully or partially inoperative safety valves in the well tubing to prevent blow-outs in wells. The replacement subsurface safety valve may be subsequently removed after insertion without requiring removal of the well tubing.
Inventors
- 👤 J Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/105; E21B34/106; E21B2200/00; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/8593; Y10T137/87917; Y10T137/87981
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
117 words
A flow control valve for positioning with a first housing having a first controlled valve mounted with the first housing for controlling flow of fluid through a flow passage formed in the first housing, comprising: a. a second valve housing adapted for movement relative to the first housing; b. second valve means mounted with said second valve housing and adapted to be positioned with the first housing for movement to and from open and closed positions for controlling flow through the flow passage; and c. actuating means for operating said second valve means to and from open and closed positions for controlling flow through the flow passage in association with the operation of the first controlled valve.
Claim 2
Dependent Claim
117 words
A flow control valve for positioning with a first housing having a first controlled valve mounted with the first housing for controlling flow of fluid through a flow passage formed in the first housing, comprising: a. a second valve housing adapted for movement relative to the first housing; b. second valve means mounted with said second valve housing and adapted to be positioned with the first housing for movement to and from open and closed positions for controlling flow through the flow passage; and c. actuating means for operating said second valve means to and from open and closed positions for controlling flow through the flow passage in association with the operation of the first controlled valve.
Claim 3
Dependent Claim
27 words
The structure of claim 1, wherein said actuating means comprises: means for operating said second valve means in response to the controls of the first controlled valve.
Claim 4
Dependent Claim
18 words
means for moving said stopper valve means to and from positions opening and closing the well tubing; and
Claim 5
Dependent Claim
18 words
means for moving said stopper valve means to and from positions opening and closing the well tubing; and
Claim 6
Dependent Claim
17 words
actuating means for operating said second valve means to and from the open and closed positions; and
Claim 7
Dependent Claim
17 words
actuating means for operating said second valve means to and from the open and closed positions; and
Claim 8
Dependent Claim
31 words
means for seating said second valve means and said actuating means adjacent the controlled valve for operating said actuating means to prevent blowouts in the well with said second valve means.
Claim 9
Dependent Claim
31 words
means for seating said second valve means and said actuating means adjacent the controlled valve for operating said actuating means to prevent blowouts in the well with said second valve means.
Claim 10
Dependent Claim
50 words
control means for controlling said means for moving; and b. a second valve means movable through the well tubing to a location adjacent said controlled safety valve when desired, said second valve means responding to said control means of said controlled safety valve to open and close the well tubing.
Claim 11
Dependent Claim
50 words
control means for controlling said means for moving; and b. a second valve means movable through the well tubing to a location adjacent said controlled safety valve when desired, said second valve means responding to said control means of said controlled safety valve to open and close the well tubing.
Claim 12
Dependent Claim
62 words
The structure of claim 2 wherein said means for operating comprises: a. first control means moving said second valve means; b. second control means mounted with the first housing for controlling said first control means; and c. each of said control means acting in response to the controls of the first controlled valve to control the position of said second valve means.
Claim 13
Dependent Claim
23 words
The structure of claim 1, wherein said second valve means comprises: a valve member rotating to and from the open and closed position.
Claim 14
Dependent Claim
28 words
The structure of claim 1 further including: spring means mounted with said second housing for responding to said actuating means for urging operation of said second valve means.
Claim 15
Dependent Claim
33 words
The structure of claim 1, further including: means for spacing said second valve means with respect to the first controlled valve for seating adjacent their first controlled valve to control said actuating means.
Claim 16
Dependent Claim
32 words
The structure of claim 6, wherein said means for spacing comprises: spacing member means for engaging the first controlled valve when the second valve is moved into position adjacent the first valve.
Claim 17
Dependent Claim
22 words
The structure of claim 1, including: means for mounting said second valve means with the first housing adjacent the first controlled valve.
Claim 18
Dependent Claim
20 words
The structure of claim 8, wherein said means for mounting comprises: resilient mounting collar means for engaging the first housing.
Claim 19
Dependent Claim
28 words
The structure of claim 8, wherein said means for mounting comprises: resilient mounting collar means for engaging an annular groove formed in the interior of the first housing.
Claim 20
Dependent Claim
32 words
The structure of claim 1, further including: a. means for moving the second valve means in the flow passage; and b. means for attaching the second valve with said means for moving.
Claim 21
Dependent Claim
29 words
The structure of claim 11, wherein said means for attaching comprises: a plurality of attaching member means for releasably mounting said second valve means with said means for moving.
Claim 22
Dependent Claim
21 words
The structure of claim 12 further including: releasable shear pins for releasably mounting the attaching members with said second valve means.
Claim 23
Dependent Claim
53 words
The structure of claim 11, further including: a. means for spacing said flow control valve with respect to the first controlled valve for seating adjacent the first controlled valve to control said flow control valve; and b. means for removing said means for spacing from the flow passage wherein flow may be continued.
Claim 24
Independent Claim
39 words
An apparatus for preventing well blowouts, comprising: a. a controlled valve mounted with the flow tubing in the well; and b. a second valve movable into said controlled valve when said controlled valve becomes defective, or when desired, comprising:
Claim 25
Independent Claim
39 words
An apparatus for preventing well blowouts, comprising: a. a controlled valve mounted with the flow tubing in the well; and b. a second valve movable into said controlled valve when said controlled valve becomes defective, or when desired, comprising:
Claim 26
Dependent Claim
31 words
The structure of claim 15, wherein said second valve means further includes: means for opening and closing said second valve means in response to the controls of the controlled safety valve.
Claim 27
Dependent Claim
22 words
The structure of claim 15, further including: a. control fluid means for controlling the opening and closing of said controlled safety valve.
Claim 28
Independent Claim
20 words
An apparatus for preventing well blowouts, comprising: a. a controlled safety valve mounted with the tubing in the well, comprising:
Claim 29
Independent Claim
20 words
An apparatus for preventing well blowouts, comprising: a. a controlled safety valve mounted with the tubing in the well, comprising:
Claim 30
Dependent Claim
31 words
The structure of claim 18, wherein said control means comprises: a. first control means for controlling said means for moving; and b. second control means for controlling said means for moving.
Claim 31
Dependent Claim
40 words
The structure of claim 19, wherein said first control means comprises: a. means for controlling said means for moving to open said stopper valve means; and b. means for controlling said second valve means to open said second valve means.
Claim 32
Dependent Claim
40 words
The structure of claim 19, wherein said second control means comprises: a. means for controlling said means for moving to close said stopper valve means; and b. means for controlling said second valve means to close said second valve means.
Claim 33
Dependent Claim
22 words
The structure of claim 18, further including; means for utilizing said control means for controlling the operation of said second valve means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |