US3735813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storm choke
Assignee: Individual
•
Filing: 1971-03-12
•
Granted: 1973-05-29
•
Expires: 1991-03-12
Abstract
Abstract There is disclosed a storm choke adapted to close a well tubing and the annulus between the tubing and the well casing into which the tubing is run in response to predetermined changes in the velocity of well fluid flowing upwardly through the tubing and casing, respectively.
Inventors
- 👤 W T Mack
- 👤 T Tyler Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08; E21B33/00; E21B33/10; E21B33/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
168 words
A tubing storm choke, comprising a body having a reduced bore therethrough adapted to form a continuation of a tubing string, a downwardly and outwardly conically shaped metal seat on the body about the lower end of the bore, shiftable means including a similarly shaped metal closure element disposed in the body beneath the seat for movement vertically upwardly from a lower position spaced from the seat to open the bore to an upper position engaged with the seat to close the bore, said shiftable means also including a rod extending upwardly from the closure element and loosely through the bore to provide an annular flow path therebetween, and means on the rod seatable on the body to normally suspend the closure element in its open position, said closure element being urged to said lower position solely in response to the weight of said shiftable means, and to said upper position solely in response to a predetermined change in velocity of well fluid through the annular flow path.
Claim 2
Dependent Claim
168 words
A tubing storm choke, comprising a body having a reduced bore therethrough adapted to form a continuation of a tubing string, a downwardly and outwardly conically shaped metal seat on the body about the lower end of the bore, shiftable means including a similarly shaped metal closure element disposed in the body beneath the seat for movement vertically upwardly from a lower position spaced from the seat to open the bore to an upper position engaged with the seat to close the bore, said shiftable means also including a rod extending upwardly from the closure element and loosely through the bore to provide an annular flow path therebetween, and means on the rod seatable on the body to normally suspend the closure element in its open position, said closure element being urged to said lower position solely in response to the weight of said shiftable means, and to said upper position solely in response to a predetermined change in velocity of well fluid through the annular flow path.
Claim 3
Dependent Claim
28 words
A choke of the character defined in claim 1, wherein means seatable on the body comprises a guide part closely fittable within the body above the reduced bore.
Claim 4
Dependent Claim
28 words
A choke of the character defined in claim 2, including a guide part suspended from the closure element and closely fittable within the body below the reduced bore.
Claim 5
Dependent Claim
38 words
A choke of the character defined in claim 1, wherein the upper end of the rod has a reduced neck to which a weight-imparting member may be releasably connected upon lowering through the tubing string above the body.
Claim 6
Dependent Claim
31 words
A choke of the character defined in claim 1, said shiftable means includes a weight-imparting member adapted to be lowered through the string and onto the upper end of the rod.
Claim 7
Dependent Claim
35 words
A choke of the character defined in claim 1, wHerein said body has threads on its upper and lower ends for connection with threads on the ends of the string above and below the body.
Claim 8
Dependent Claim
152 words
An annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends to connect it in a tubing string for lowering therewith into a well casing, a generally tubular member surrounding the body in spaced relation thereto to form an annular passageway therebetween, an annular, downwardly facing seat about the body, an annular, upwardly facing closure element on the tubular member, means mounting the member from the body for movement upwardly, in response to a predetermined change in the velocity of well fluid within the annulus from a lower position in which the said closure element is below the seat to open the passageway between the body and member and an upper position in which the closure element engages the seat to close said passageway, and means for sealing between the outer side of the tubular member and well casing when said passageway is closed.
Claim 9
Dependent Claim
152 words
An annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends to connect it in a tubing string for lowering therewith into a well casing, a generally tubular member surrounding the body in spaced relation thereto to form an annular passageway therebetween, an annular, downwardly facing seat about the body, an annular, upwardly facing closure element on the tubular member, means mounting the member from the body for movement upwardly, in response to a predetermined change in the velocity of well fluid within the annulus from a lower position in which the said closure element is below the seat to open the passageway between the body and member and an upper position in which the closure element engages the seat to close said passageway, and means for sealing between the outer side of the tubular member and well casing when said passageway is closed.
Claim 10
Dependent Claim
54 words
A choke of the character defined in claim 7, wherein the sealing means includes a sleeve supported by and sealably slidable vertically over the tubular member, and at least one seal ring surrounding the tubular member and radially expandable upon upward movement of the sleeve to seal between said member and the well casing.
Claim 11
Dependent Claim
39 words
A choke of the character defined in claim 8, wherein said tubular member has a downwardly facing shoulder thereabout, and said seal means includes at least one seal ring between the upper end of the sleeve and said shoulder.
Claim 12
Dependent Claim
108 words
A combination tubing and annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends for connecting it in a tubing string, valve means carried by the body for movement from a position opening said bore to a position closing said bore in response to a predetermined increase in velocity of well fluid flowing upwardly through the bore, and valve means carried by the body for movement from a position opening said annulus to a position closing the annulus between said tubing string and casing in response to a predetermined increase in velocity of well fluid flowing upward through the annulus.
Claim 13
Dependent Claim
108 words
A combination tubing and annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends for connecting it in a tubing string, valve means carried by the body for movement from a position opening said bore to a position closing said bore in response to a predetermined increase in velocity of well fluid flowing upwardly through the bore, and valve means carried by the body for movement from a position opening said annulus to a position closing the annulus between said tubing string and casing in response to a predetermined increase in velocity of well fluid flowing upward through the annulus.
Claim 14
Dependent Claim
149 words
A combination tubing and annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends for connecting it in a tubing string, a seat about the bore through the body, a closure element carried by the body for engaging said seat to close said bore in response to a predetermined increase in velocity of well fluid flowing upwardly through the bore, a tubular member carried about the body to provide an annular passageway therebetween, a seat about the outer side of the body, a closure element on the tubular member for engaging the outer seat to close the passageway between the tubing string and casing in response to a predetermined increase in velocity of fluid flowing upwardly through the annulus, and means about the tubular member for sealing between said member and the well casing into which the tubing string is run.
Claim 15
Dependent Claim
149 words
A combination tubing and annulus storm choke, comprising a body having a bore therethrough and means on its upper and lower ends for connecting it in a tubing string, a seat about the bore through the body, a closure element carried by the body for engaging said seat to close said bore in response to a predetermined increase in velocity of well fluid flowing upwardly through the bore, a tubular member carried about the body to provide an annular passageway therebetween, a seat about the outer side of the body, a closure element on the tubular member for engaging the outer seat to close the passageway between the tubing string and casing in response to a predetermined increase in velocity of fluid flowing upwardly through the annulus, and means about the tubular member for sealing between said member and the well casing into which the tubing string is run.
Claim 16
Dependent Claim
58 words
A choke of the character defined in claim 11, wherein the body has inwardly and outwardly enlarged portions intermediate its upper and lower ends, said seat about the bore is formed on the lower end of the inwardly enlarged portion, and the outer seat is formed on the lower end of the outwardly enlarged portion of the body.
Claim 17
Dependent Claim
34 words
A choke of the character defined in claim 12, wherein the upper end of the tubular body haa an inwardly extending portion for guidably sliding over the body above the outwardly enlarged portion thereof.
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |