US3289691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve sub
Assignee: Individual
•
Filing: 1964-11-09
•
Granted: 1966-12-06
•
Expires: 1984-11-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Kennard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:54
CPC Classifications
F; F16; F16L; F16L29/00; F16L29/007; E; E21; E21B; E21B17/00; E21B21/00; E21B21/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A VALVE SUB FOR INCLUDING IN A DRILL STRING BELOW THE KELLY TO PREVENT LOSS OF DRILLING FLUID WHILE MAKING CONNECTIONS DURING DOWN HOLE DRILLING COMPRISING: A BODY MEMBER HAVING MEANS FOR ATTACHING IN SAID DRILL STRING AND HAVING AN AXIAL BORE THERETHROUGH PISTON MEANS MOUNTED FOR AXIAL MOVEMENT IN SAID BODY MEMBER, SAID PISTON MEANS INCLUDING A TUBULAR MEMBER HAVING AN AXIAL BORE THERETHROUGH OF A DIAMETER SUBSTANTIALLY AS LARGE AS THE DIAMETER OF THE BORE THROUGH THE DRILL STRING, RESILIENT BIASING MEANS FOR URGING SAID PISTON MEANS DOWNWARDLY, FULL OPENING BORE CLOSING MEANS OPERABLY CONNECTED TO THE LOWER END OF SAID PISTON MEANS AND ADAPTED TO BE PLACED IN THE CLOSED POSITION BY MOVEMENT OF SAID PISTON MEANS DOWNWARDLY, AND MEANS FOR APPLYING A PRESSURIZED FLUID TO SAID PISTON MEANS TO THEREBY DRIVE SAID PISTON MEANS UPWARDLY AND TO MOVE SAID BORE CLOSING MEANS TO AN OPEN POSITION.
Claim 2
Dependent Claim
150 words
A VALVE SUB FOR INCLUDING IN A DRILL STRING BELOW THE KELLY TO PREVENT LOSS OF DRILLING FLUID WHILE MAKING CONNECTIONS DURING DOWN HOLE DRILLING COMPRISING: A BODY MEMBER HAVING MEANS FOR ATTACHING IN SAID DRILL STRING AND HAVING AN AXIAL BORE THERETHROUGH PISTON MEANS MOUNTED FOR AXIAL MOVEMENT IN SAID BODY MEMBER, SAID PISTON MEANS INCLUDING A TUBULAR MEMBER HAVING AN AXIAL BORE THERETHROUGH OF A DIAMETER SUBSTANTIALLY AS LARGE AS THE DIAMETER OF THE BORE THROUGH THE DRILL STRING, RESILIENT BIASING MEANS FOR URGING SAID PISTON MEANS DOWNWARDLY, FULL OPENING BORE CLOSING MEANS OPERABLY CONNECTED TO THE LOWER END OF SAID PISTON MEANS AND ADAPTED TO BE PLACED IN THE CLOSED POSITION BY MOVEMENT OF SAID PISTON MEANS DOWNWARDLY, AND MEANS FOR APPLYING A PRESSURIZED FLUID TO SAID PISTON MEANS TO THEREBY DRIVE SAID PISTON MEANS UPWARDLY AND TO MOVE SAID BORE CLOSING MEANS TO AN OPEN POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |