Patent US3584645A successfully refreshed from Google Patents.
US3584645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control valve for wells
Assignee: Cook Testing Co
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Filing: 1969-12-30
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Granted: 1971-06-15
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Expires: 1989-12-30
Abstract
Abstract A tubular body for use in a well has a downward facing seat engaged by a ball which moves upward out of an inclined pocket on one side of the body. An offset axial flow passage on the other side of the body communicates with a chamber between the pocket and the seat, so that the ball is lifted to contact the seat by aspirator action upon excessive rate of flow through the passage. A sleeve encircling a portion of the body forms an end wall of the inclined pocket and seal means between the body and the sleeve above and below the pocket prevent leakage. Latches on spring fingers on the body hold the device in position within a well pipe.
Inventors
- 👤 Gary A Radig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:50
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
In a device for controlling upward flow of fluid in a well, the combination of: a tubular body having a centrally positioned downward facing annular seat therein, the body having a central chamber below the seat and an inclined pocket on one side thereof communicating with the chamber, a sleeve encircling a portion of the body and forming an end wall of the inclined pocket, axially spaced sealing means between the body and the sleeve above and below said pocket, the body having an offset axial passage on the other side thereof remote from the end wall and communicating with the chamber, and a ball movable from an inoperative position in the pocket through the chamber to an operative sealing position in contact with said seat, to control flow through the body.
Claim 2
Dependent Claim
132 words
In a device for controlling upward flow of fluid in a well, the combination of: a tubular body having a centrally positioned downward facing annular seat therein, the body having a central chamber below the seat and an inclined pocket on one side thereof communicating with the chamber, a sleeve encircling a portion of the body and forming an end wall of the inclined pocket, axially spaced sealing means between the body and the sleeve above and below said pocket, the body having an offset axial passage on the other side thereof remote from the end wall and communicating with the chamber, and a ball movable from an inoperative position in the pocket through the chamber to an operative sealing position in contact with said seat, to control flow through the body.
Claim 3
Dependent Claim
19 words
The combination set forth in claim 1 wherein the offset axial passage is smaller in diameter than the ball.
Claim 4
Dependent Claim
47 words
The combination set forth in claim 1 wherein the proportions of the inclined pocket and the offset axial passage are such in relation to said ball that the offset axial passage is substantially unobstructed when the ball is in its inoperative position in contact with said sleeve.
Claim 5
Dependent Claim
24 words
The combination set forth in claim 1 wherein the outer surface of the sleeve is substantially flush with the outer surface of the body.
Claim 6
Dependent Claim
30 words
The combination set forth in claim 1 wherein the sleeve is telescopically mounted on the body to permit insertion of the ball into the pocket before installation of the sleeve.
Claim 7
Dependent Claim
40 words
The combination set forth in claim 1 wherein the sleeve is provided with an internal recess to receive a portion oF the ball and wherein removable retainer means is provided to prevent relative movement of the sleeve and the body.
Claim 8
Dependent Claim
23 words
The combination set forth in claim 1 wherein means are provided on the body for securing it in position within a well tube.
Claim 9
Dependent Claim
35 words
The combination set forth in claim 1 wherein spring fingers are provided on the body, and wherein a latching lug is provided on each spring finger for engagement with an element of a well tube.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |