US3155401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well head assembly
Assignee: Individual
•
Filing: 1961-02-06
•
Granted: 1964-11-03
•
Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Musolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:33
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; Y; Y10; Y10S; Y10S285/00; Y10S285/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
WELL HEAD ASSEMBLY APPARATUS COMPRISING: A FIRST HOUSING HAVING A LONGITUDINAL BORE PORTION AND FORMED WITH AN UPWARDLY-FACING SHOULDER; A SECOND HOUSING HAVING AN ANNULAR PORTION IN LONGITUDINALLY SLIDABLY COUPLED POSITION WITHIN SAID BORE PORTION, SAID SECOND HOUSING BEING FORMED WITH A DOWNWARDLY-FACING SHOULDER THAT RESTS UPON SAID UPWARDLY-FACING SHOULDER; AT LEAST ONE RECESS FORMED AROUND THE INSIDE SURFACE OF SAID BORE PORTION; UPPER AND LOWER OUTWARDLY-FACING ANNULAR GROOVES FORMED AROUND THE OUTER SURFACE OF SAID ANNULAR PORTION, SAID UPPER GROOVE AND SAID RECESS BEING IN OPPOSITE, CONCENTRIC JUXTAPOSITION WHEN SAID ANNULAR PORTION IS IN COUPLED POSITION WITHIN SAID BORE PORTION AS AFORESAID, AND THE LOWER SURFACE OF SAID UPPER GROOVE SLOPING RADIALLY OUTWARDLY AND DOWNWARDLY; AN ANNULAR PACKING RING AND AN ANNULAR PACKING RETAINER RING POSITIONED IN SAID LOWER GROOVE, SAID PACKING RING AND SAID RETAINER RING BEING IN COAXIAL END-TO-END ABUTMENT THEREIN, SAID RETAINER RING BEING ABOVE SAID PACKING RING AND, THE UPPER SURFACE OF SAID RETAINER RING SLOPING RADIALLY OUTWARDLY AND DOWNWARDLY; AT LEAST ONE ELONGATED ARCUATE SHOE MEMBER CARRIED IN SAID RECESS AND SLIDABLE RADIALLY THEREOF BETWEEN A RETRACTED POSITION AND AN EXTENDED POSITION
Claim 2
Dependent Claim
188 words
WELL HEAD ASSEMBLY APPARATUS COMPRISING: A FIRST HOUSING HAVING A LONGITUDINAL BORE PORTION AND FORMED WITH AN UPWARDLY-FACING SHOULDER; A SECOND HOUSING HAVING AN ANNULAR PORTION IN LONGITUDINALLY SLIDABLY COUPLED POSITION WITHIN SAID BORE PORTION, SAID SECOND HOUSING BEING FORMED WITH A DOWNWARDLY-FACING SHOULDER THAT RESTS UPON SAID UPWARDLY-FACING SHOULDER; AT LEAST ONE RECESS FORMED AROUND THE INSIDE SURFACE OF SAID BORE PORTION; UPPER AND LOWER OUTWARDLY-FACING ANNULAR GROOVES FORMED AROUND THE OUTER SURFACE OF SAID ANNULAR PORTION, SAID UPPER GROOVE AND SAID RECESS BEING IN OPPOSITE, CONCENTRIC JUXTAPOSITION WHEN SAID ANNULAR PORTION IS IN COUPLED POSITION WITHIN SAID BORE PORTION AS AFORESAID, AND THE LOWER SURFACE OF SAID UPPER GROOVE SLOPING RADIALLY OUTWARDLY AND DOWNWARDLY; AN ANNULAR PACKING RING AND AN ANNULAR PACKING RETAINER RING POSITIONED IN SAID LOWER GROOVE, SAID PACKING RING AND SAID RETAINER RING BEING IN COAXIAL END-TO-END ABUTMENT THEREIN, SAID RETAINER RING BEING ABOVE SAID PACKING RING AND, THE UPPER SURFACE OF SAID RETAINER RING SLOPING RADIALLY OUTWARDLY AND DOWNWARDLY; AT LEAST ONE ELONGATED ARCUATE SHOE MEMBER CARRIED IN SAID RECESS AND SLIDABLE RADIALLY THEREOF BETWEEN A RETRACTED POSITION AND AN EXTENDED POSITION
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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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |