US3780804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable mounted bailer for well drilling and cleaning
Assignee: Individual
•
Filing: 1972-10-10
•
Granted: 1973-12-25
•
Expires: 1992-10-10
Abstract
Abstract A well bailer having a sleeve or barrel with a valve head reciprocably supported therewithin and a cooperative arrangement of notches on said barrel and a barrel holder to fit into said notches to facilitate the controlled dumping of the bailer.
Inventors
- 👤 V Pagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:52
CPC Classifications
E; E21; E21B; E21B27/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A well bailer comprising: an elongated hollow barrel having a lower end for placement in a well, a valve head, a support and guide unit for said head reciprocably carried in said barrel and movable to permit said head to engage said lower end of said barrel to form a closure for said barrel, one-way valve means on said head to permit material to enter said barrel when said head is in engagement with said end of said barrel, and means for moving said head out of engagement with said end of said barrel to discharge material from within said barrel.
Claim 2
Dependent Claim
101 words
A well bailer comprising: an elongated hollow barrel having a lower end for placement in a well, a valve head, a support and guide unit for said head reciprocably carried in said barrel and movable to permit said head to engage said lower end of said barrel to form a closure for said barrel, one-way valve means on said head to permit material to enter said barrel when said head is in engagement with said end of said barrel, and means for moving said head out of engagement with said end of said barrel to discharge material from within said barrel.
Claim 3
Dependent Claim
77 words
The well bailer set forth in claim 1 wherein said means for moving said head out of engagement with said end of said barrel comprises: a pair of notches formed in the outside surface of said barrel, a fork member for engagement in said notches to support said barrel against movement, and means for lowering said support and guide unit to move said head relative to said barrel out of engagement with said end of said barrel.
Claim 4
Dependent Claim
47 words
The well bailer set forth in claim 2 wherein said guide and support unit comprises: a rod member fastened to said head and extending the length of said barrel, and a plurality of vanes carried on said rod member to guide same substantially axially of said barrel.
Claim 5
Dependent Claim
37 words
The well bailer set forth in claim 3 wherein said means for lowering said support and guide unit comprises: a bail at the end of said unit opposite said head for attachment to a bailer operating device.
Claim 6
Dependent Claim
74 words
The well bailer set forth in claim 1 wherein said valve head comprises: a cylindrical body portion having an upper and a lower end and a substantially axial opening therethrough, said one-way valve means being mounted on said upper end of said head, and said lower end of said head having a bevel from its outer edge toward said opening in said head to guide material into said opening and through said valve means.
Claim 7
Dependent Claim
31 words
The well bailer set forth in claim 5 wherein: said upper end of said head has aN annular groove to receive said lower end of said barrel to form said closure.
References Cited (Backward Citations)
US3118503A
Cited
US3089544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |