US3603387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowout guillotine
Assignee: Individual
•
Filing: 1970-05-19
•
Granted: 1971-09-07
•
Expires: 1990-05-19
Abstract
Abstract A hinged housing can be opened and then closed around a well casing with a tight seal. A rotary cutter disc is slidably mounted in the housing and operates to cut through the well casing within the housing and to polish the upper end of that part of the severed casing extending into the well. Hydraulic means are then actuated to press a face of the cutter disc against the polished end of the casing to positively close and seal the well.
Inventors
- 👤 William N Schoeffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; B; B23; B23D; B23D45/00; B23D45/003; B23D45/006; B23D45/12; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
A device for cutting through and sealing an oil well casing, comprising: a housing having complementary, relatively movable portions adapted to embrace and sealingly engage and clamp around an oil well casing at axially spaced positions; a chamber in said housing, a first portion of which surrounds said casing between said spaced positions; a rotary cutter disc, having a cutting edge, rotatably mounted in a second portion of said chamber and mounted for movement to project a portion of the same into said first portion to thereby sever said casing and position said disc across a severed end thereof; selectively operable means carried by said housing for forcibly pressing one face of said disc against said severed end of said casing to seal the same; and drive means for rotating said cutter disc, and separate means for moving said disc to project its said portion into said first portion of said chamber .
Claim 2
Independent Claim
153 words
A device for cutting through and sealing an oil well casing, comprising: a housing having complementary, relatively movable portions adapted to embrace and sealingly engage and clamp around an oil well casing at axially spaced positions; a chamber in said housing, a first portion of which surrounds said casing between said spaced positions; a rotary cutter disc, having a cutting edge, rotatably mounted in a second portion of said chamber and mounted for movement to project a portion of the same into said first portion to thereby sever said casing and position said disc across a severed end thereof; selectively operable means carried by said housing for forcibly pressing one face of said disc against said severed end of said casing to seal the same; and drive means for rotating said cutter disc, and separate means for moving said disc to project its said portion into said first portion of said chamber .
Claim 3
Dependent Claim
51 words
A device as defined in claim 1 Wherein said relatively movable portions of said housing comprise a pair of complementary portions hingedly connected together, means for hingedly swinging said complementary portions between open and closed positions, and selectively operable means for locking said complementary portions in closed position about said casing.
Claim 4
Dependent Claim
28 words
A device as defined in claim 1 wherein said pressing means comprises at least one hydraulic ram device and remotely located control means for said hydraulic ram device.
Claim 5
Dependent Claim
40 words
A device as defined in claim 1 wherein said disc is provided with cutting means on its periphery for severing said casing, and polishing means on said one face adjacent said periphery for polishing the severed end of said casing.
Claim 6
Dependent Claim
31 words
A device as defined in claim 4 wherein said one face of said disc, radially inwardly of said polishing means, comprises a facing material softer than the material of said casing.
Claim 7
Dependent Claim
13 words
A device as defined in claim 5 wherein said facing material is bronze.
Claim 8
Dependent Claim
31 words
A device as defined in claim 1 wherein said cutter disc is rotatably mounted on a carriage, slidable in said second portion of said chamber toward and from said first portion.
Claim 9
Dependent Claim
67 words
A device as defined in claim 7 wherein said chamber is a closed chamber in said housing, said drive means comprising a drive shaft extending rotatably and slidably outwardly of said housing substantially parallel to the direction of movement of said carriage, said separate means comprising an elongated member connected at one end to said carriage and extending outwardly of said housing parallel to said drive shaft.
Claim 10
Dependent Claim
23 words
A device as defined in claim 8 wherein said separate means comprises a tubular member, said drive shaft extending through said tubular member.
References Cited (Backward Citations)
US940356A
Cited
US1803945A
Cited
US2840100A
Cited
US2969838A
Cited
US3385314A
Cited
US3532113A
Cited
US3561526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |