US3334697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet sub for drilling well bores
Assignee: Tenneco Inc
•
Filing: 1964-11-09
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Granted: 1967-08-08
•
Expires: 1984-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jack H Edwards
- 👤 Jr Leslie B Plumb
- 👤 Jr William T Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:00
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/16; E21B21/10; E21B21/103; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PRESSURE RESPONSIVE JET SUB FOR INCLUDING IN A STRING OF DRILL PIPE FOR REMOVING LIQUID SLUGS FROM THE WELL BORE DURING DRILLING OPERATIONS IN WHICH GAS IN USED AS THE CIRCULATING FLUID, COMPRISING: A GENERALLY TUBULAR BODY MEMBER HAVING A GENERALLY UNOBSTRUCTED AXIAL BORE THERETHROUGH OF GENERALLY UNIFORM SIZE THROUGHOUT, SAID BODY MEMBER HAVING A JET OPENING EXTENDING UPWARDLY AND OUTWARDLY THROUGH THE WALL THEREOF AND WHICH OPENING HAS A REDUCED ORIFICE AT THE UPPER END THEREOF, A RESILIENTLY BIASED PRESSURE RESPONSIVE VALVE MOUNTED ENTIRELY WITHIN THE WALL OF SAID BODY MEMBER AND CONTROLLING THE PASSAGE OF GAS THROUGH SAID JET OPENING, AND ADJUSTING MEANS FOR SETTING SAID VALVE TO OPEN ONLY WHEN THE PRESSURE DIFFERENTIAL BETWEEN SAID AXIAL BORE AND THE ANNULUS AROUND SAID PIPE EXCEEDS A PREDETERMINED LEVEL.
Claim 2
Dependent Claim
131 words
A PRESSURE RESPONSIVE JET SUB FOR INCLUDING IN A STRING OF DRILL PIPE FOR REMOVING LIQUID SLUGS FROM THE WELL BORE DURING DRILLING OPERATIONS IN WHICH GAS IN USED AS THE CIRCULATING FLUID, COMPRISING: A GENERALLY TUBULAR BODY MEMBER HAVING A GENERALLY UNOBSTRUCTED AXIAL BORE THERETHROUGH OF GENERALLY UNIFORM SIZE THROUGHOUT, SAID BODY MEMBER HAVING A JET OPENING EXTENDING UPWARDLY AND OUTWARDLY THROUGH THE WALL THEREOF AND WHICH OPENING HAS A REDUCED ORIFICE AT THE UPPER END THEREOF, A RESILIENTLY BIASED PRESSURE RESPONSIVE VALVE MOUNTED ENTIRELY WITHIN THE WALL OF SAID BODY MEMBER AND CONTROLLING THE PASSAGE OF GAS THROUGH SAID JET OPENING, AND ADJUSTING MEANS FOR SETTING SAID VALVE TO OPEN ONLY WHEN THE PRESSURE DIFFERENTIAL BETWEEN SAID AXIAL BORE AND THE ANNULUS AROUND SAID PIPE EXCEEDS A PREDETERMINED LEVEL.
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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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |