Patent US3575237A successfully refreshed from Google Patents.
US3575237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closeoff tool for bores or other openings
Assignee: Lynes Inc
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Filing: 1969-07-10
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Granted: 1971-04-20
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Expires: 1989-07-10
Abstract
Abstract A bore or other opening closeoff tool for inclusion in a tubular string which extends within the bore or other opening, the tool including valve means to close off internally of the tool and tubular string and reinforced inflatable element means which can be expanded to seal off within the surrounding bore or other opening.
Inventors
- 👤 Billy C Malone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:19
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B33/1272
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
190 words
A bore closeoff tool for inclusion between two portions of a tubular string in the bore comprising; a. a mandrel for connection with one portion of the tubular string; b. a housing carried by said mandrel, said housing in cooperation with said mandrel forming a chamber for receiving liquid therein; c. means on said housing for connection with the other portion of the tubular string; d. a reinforced inflatable element carried by said housing; e. piston means on said mandrel and positioned within said chamber; f. there being passage means in the tool for conducting liquid from said chamber to said inflatable element; g. said piston movable within said chamber upon relative longitudinal movement between said mandrel and housing to force liquid from said chamber into said reinforced inflatable element to expand said reinforced inflatable element and seal off the bore; h. said mandrel and said housing having a continuous central bore for commUnicating with the well string; and i. ball valve means rotatably mounted within the bore in said housing operable to close off the continuous central bore in said mandrel and housing from communication with the tubular string.
Claim 2
Dependent Claim
190 words
A bore closeoff tool for inclusion between two portions of a tubular string in the bore comprising; a. a mandrel for connection with one portion of the tubular string; b. a housing carried by said mandrel, said housing in cooperation with said mandrel forming a chamber for receiving liquid therein; c. means on said housing for connection with the other portion of the tubular string; d. a reinforced inflatable element carried by said housing; e. piston means on said mandrel and positioned within said chamber; f. there being passage means in the tool for conducting liquid from said chamber to said inflatable element; g. said piston movable within said chamber upon relative longitudinal movement between said mandrel and housing to force liquid from said chamber into said reinforced inflatable element to expand said reinforced inflatable element and seal off the bore; h. said mandrel and said housing having a continuous central bore for commUnicating with the well string; and i. ball valve means rotatably mounted within the bore in said housing operable to close off the continuous central bore in said mandrel and housing from communication with the tubular string.
Claim 3
Dependent Claim
28 words
The invention of claim 1 including cooperating means on said mandrel and housing to accommodate relative longitudinal movement between said housing and mandrel while preventing relative rotation therebetween.
Claim 4
Dependent Claim
38 words
The invention of claim 1 wherein a restriction is formed in said passage means which restricts flow of liquid from said chamber to said inflatable element and thereby functions as a delaying means for inflation of said element.
Claim 5
Dependent Claim
48 words
The invention of claim 3 including longitudinally extending grooves in said mandrel which terminate at points spaced from the end of said chamber and which serve to communicate liquid from said chamber to said inflatable element upon a predetermined amount of relative movement between said mandrel and housing.
Claim 6
Dependent Claim
14 words
The invention of claim 1 including lock means for retaining said inflatable element inflated.
Claim 7
Dependent Claim
62 words
The invention of claim 5 wherein said lock means includes a buttress-threaded surface on said mandrel, a segmented nut carried by said housing, spring means normally urging said segmented nut radially inwardly and said segmented nut having buttress threads formed thereon for engaging with the buttress-threaded surface on said mandrel to retain said mandrel and housing in a predetermined relative longitudinal position.
Claim 8
Dependent Claim
22 words
The invention of claim 1 including externally accessible valve means carried by said housing for closing said passage means in the tool.
Claim 9
Dependent Claim
33 words
The invention of claim 1 including means carried by said housing and inflatable element to accommodate relative longitudinal movement between one end of said element and said housing while preventing relative rotation therebetween.
Claim 10
Dependent Claim
26 words
The invention of claim 8 wherein said means include cooperating keys and longitudinally extending keyways acting between one end of said inflatable element and said housing.
Claim 11
Dependent Claim
45 words
The invention of claim 8 including spring means acting between said housing and one end of said inflatable element to restrain relative longitudinal movement of said element and housing until a predetermined amount of inflating force is exerted by said inflating liquid within said element.
Claim 12
Dependent Claim
31 words
The invention of claim 10 wherein said spring means includes spring fingers carried by said inflatable element and a groove formed in said housing within which said spring fingers are received.
Claim 13
Dependent Claim
49 words
The invention of claim 1 wherein said chamber on one side of said piston means is adapted to receive a gas under pressure which acts against one side of said piston means to move it and thereby inflate said inflatable element when tension is relieved from the tubular member.
Claim 14
Dependent Claim
14 words
The invention of claim 12 including lock means for retaining said inflatable element inflated.
Claim 15
Dependent Claim
62 words
The invention of claim 13 wherein said lock means includes a buttress-threaded surface on said mandrel, a segmented nut carried by said housing, spring means normally urging said segmented nut radially inwardly and said segmented nut having buttress threads formed thereon for engaging with the buttress-threaded surface on said mandrel to retain said mandrel and housing in a predetermined relative longitudinal position.
Claim 16
Dependent Claim
70 words
The invention of claim 12 including externally accessible valve means carried by said housing for closing said passage means in the tool. 16 The invention of claim 1 including an additional chamber formed in said housing for receiving a gas under pressure, means for communicating said gas under pressure to one side of said piston means and thereby force it to move liquid from said chamber into said inflatable element.
Claim 17
Dependent Claim
28 words
The invention of claim 16 including cooperating means on said mandrel and housing to accommodate relative longitudinal movement between said housing and mandrel while preventing relative rotation therebetweeN.
Claim 18
Dependent Claim
38 words
The invention of claim 16 wherein a restriction is formed in said passage means which restricts flow of liquid from said chamber to said inflatable element and thereby functions as a delaying means for inflation of said element.
Claim 19
Dependent Claim
53 words
The invention of claim 16 including longitudinally extending grooves in said mandrel which terminate at points spaced from the end of said additional chamber and which serve to communicate gas from said additional chamber to one side of said piston means upon a predetermined amount of relative movement between said mandrel and housing.
Claim 20
Dependent Claim
14 words
The invention of claim 16 including lock means for retaining said inflatable element inflated.
Claim 21
Dependent Claim
62 words
The invention of claim 20 wherein said lock means includes a buttress-threaded surface on said mandrel, a segmented nut carried by said housing, spring means normally urging said segmented nut radially inwardly and said segmented nut having buttress threads formed thereon for engaging with the buttress-threaded surface on said mandrel to retain said mandrel and housing in a predetermined relative longitudinal position.
Claim 22
Dependent Claim
22 words
The invention of claim 16 including externally accessible valve means carried by said housing for closing said passage means in the tool.
Claim 23
Dependent Claim
17 words
The invention of claim 1 including spring means for urging said inflatable element towards an extended position.
Claim 24
Dependent Claim
34 words
The invention of claim 1 including cooperating means on said ball valve means and tool to rotate said ball valve means and close it upon relative movement between said ball valve means and tool.
Claim 25
Dependent Claim
36 words
The invention of claim 24 wherein said cooperating means includes: a. pin means carried by said housing; and b. said ball valve means having an opening in its surface in which said pin means is received.
Claim 26
Dependent Claim
101 words
The invention of claim 1 wherein said ball valve means includes: a. a spring supported sleeve having a valve seat on its upper end; b. a ball valve on said seat; c. pin means carried by said housing; d. said ball valve having a groove in its surface in which said pin means is received; e. slidable sleeve means above said ball valve and having a seat abutted against said seat; f. said ball valve being rotatable by coaction between said pin and groove when said slidable sleeve is forced downwardly thereagainst to move the ball valve to a closed position.
Claim 27
Dependent Claim
80 words
The invention of claim 24 wherein said cooperating means includes: a. pin means supporting said ball valve means for rotation in said housing; b. said pin means having a crank arm thereon; c. sleeve means surrounding said ball valve means and having slot means formed therein; and d. spring means supporting said sleeve means whereby said sleeve may move longitudinally relative to said housing whereupon said slot means engages and rotates said crank arm and closes said ball valve means.
Claim 28
Dependent Claim
73 words
The invention of claim 24 wherein said cooperating means includes: a. pivot pin means supporting said ball valve means for rotation within said housing; b. a crank arm extending from said pivot pin means; and c. sleeve means having at least one slot formed therein for engaging said crank arm upon relative movement between said sleeve means and said housing whereby said ball valve means may be rotated to open and close it.
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |