Patent US2504200A successfully refreshed from Google Patents.
Patent US3438654A successfully refreshed from Google Patents.
US3438654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well completion apparatus
Assignee: Rockwell Manufacturing Co
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Filing: 1964-05-04
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Granted: 1969-04-15
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 John G Jackson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047; E21B33/0422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
APPARATUS COMPRISING: A WELLHEAD BODY HAVING A SUBSTANTIALLY CYLINDRICAL VERTICAL BORE THERETHROUGH AND A WALL AROUND SAID BORE, PIPE HANGER MEANS POSITIONED WITHIN SAID BORE, MEANS ON SAID PIPE HANGER MEANS TO SUPPORT A WELL PIPE THEREBELOW, SEAL MEANS ABOVE AND SUPPORTED BY SAID PIPE HANGER MEANS POSITIONED TO SEALINGLY ENGAGES SAID VERTICAL BORE AND A TUBULAR MEMBER EXTENDING UPWARDLY FROM SAID WELL PIPE, UPON BEING VERTICALLY COMPRESSED, MEANS ON SAID BODY ENGAGEABLE WITH SAID SEAL MEANS TO COMPRESS IT DOWNWARDLY AND THEREBY CAUSE IT TO BE MOVED INTO SUCH SEALING ENGAGEMENT INDEPENDENTLY OF THE LOAD OF THE WEIGHT OF THE WELL PIPE, MEANS ON SAID PIPE HANGER MEANS ENGAGEABLE WITH A PORTION OF SAID BORE FOR PARTIAL SUPPORT OF THE PIPE HANGER MEANS UPON MOVEMENT OF SAID PIPE HANGER MEANS DOWNWARDLY IN SAID BORE TO A PREDETERMINED POSITION, AND RETRACTABLE MEANS EXTENDING THROUGH THE WALL OF SAID BODY INTO SAID BORE AND ENGAGING AND PARTIALLY SUPPORTING SAID PIPE HANGER MEANS AT SAID PREDETERMINED POSITION.
Claim 2
Dependent Claim
165 words
APPARATUS COMPRISING: A WELLHEAD BODY HAVING A SUBSTANTIALLY CYLINDRICAL VERTICAL BORE THERETHROUGH AND A WALL AROUND SAID BORE, PIPE HANGER MEANS POSITIONED WITHIN SAID BORE, MEANS ON SAID PIPE HANGER MEANS TO SUPPORT A WELL PIPE THEREBELOW, SEAL MEANS ABOVE AND SUPPORTED BY SAID PIPE HANGER MEANS POSITIONED TO SEALINGLY ENGAGES SAID VERTICAL BORE AND A TUBULAR MEMBER EXTENDING UPWARDLY FROM SAID WELL PIPE, UPON BEING VERTICALLY COMPRESSED, MEANS ON SAID BODY ENGAGEABLE WITH SAID SEAL MEANS TO COMPRESS IT DOWNWARDLY AND THEREBY CAUSE IT TO BE MOVED INTO SUCH SEALING ENGAGEMENT INDEPENDENTLY OF THE LOAD OF THE WEIGHT OF THE WELL PIPE, MEANS ON SAID PIPE HANGER MEANS ENGAGEABLE WITH A PORTION OF SAID BORE FOR PARTIAL SUPPORT OF THE PIPE HANGER MEANS UPON MOVEMENT OF SAID PIPE HANGER MEANS DOWNWARDLY IN SAID BORE TO A PREDETERMINED POSITION, AND RETRACTABLE MEANS EXTENDING THROUGH THE WALL OF SAID BODY INTO SAID BORE AND ENGAGING AND PARTIALLY SUPPORTING SAID PIPE HANGER MEANS AT SAID PREDETERMINED 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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |