US3137348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for drilling and completing a well
Assignee: Cooper Industries LLC
•
Filing: 1961-01-06
•
Granted: 1964-06-16
•
Expires: 1981-01-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Ahlstone
- 👤 Marvin R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043; E21B7/00; E21B7/12; E21B7/128; Y; Y10; Y10S; Y10S285/00; Y10S285/92; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
WELLHEAD EQUIPMENT, COMPRISING A HEAD HAVING A BORE THERETHROUGH AND A RECESS THEREIN COMMUNICATING WITH THE BORE, A BOWL IN THE HEAD COMMUNICATING WITH THE BORE BENEATH THE RECESS, A CASING HANGER COMPRISING A PLURALITY OF SLIPS WITHIN THE RECESS, MEANS ON THE HEAD FOR MOVING THE SLIPS OUT OF THE RECESS AND INTO THE BORE TO SUSPEND A CASING THEREFROM, SAID MEANS COMPRISING CYLINDERS ON THE HEAD EACH HAVING A PISTON RECIPROCABLY SLIDABLE THEREIN AND HAVING A STEM CONNECTED TO A SLIP, MEANS FOR RECIPROCATING THE PISTONS WITHIN THE CYLINDERS INCLUDING FLUID LINES INTERCONNECTING THE CYLINDERS ON OPPOSITE SIDES OF EACH PISTON THEREIN, EACH SUCH LINE HAVING A COMMON CONNECTION TO A FLUID PUMPING SYSTEM, EACH PISTON BEING LIMITED IN ITS MOVEMENT TO CASING SUSPENDING POSITION, ALL OF SAID PISTONS HAVING SUBSTANTIALLY EQUAL PRESSURE RESPONSIVE AREAS THEREON AND ALL OF SAID PISTON STEMS HAVING CASING ENGAGING MEANS ON THEIR INNER ENDS EXTENDING
Claim 2
Dependent Claim
153 words
WELLHEAD EQUIPMENT, COMPRISING A HEAD HAVING A BORE THERETHROUGH AND A RECESS THEREIN COMMUNICATING WITH THE BORE, A BOWL IN THE HEAD COMMUNICATING WITH THE BORE BENEATH THE RECESS, A CASING HANGER COMPRISING A PLURALITY OF SLIPS WITHIN THE RECESS, MEANS ON THE HEAD FOR MOVING THE SLIPS OUT OF THE RECESS AND INTO THE BORE TO SUSPEND A CASING THEREFROM, SAID MEANS COMPRISING CYLINDERS ON THE HEAD EACH HAVING A PISTON RECIPROCABLY SLIDABLE THEREIN AND HAVING A STEM CONNECTED TO A SLIP, MEANS FOR RECIPROCATING THE PISTONS WITHIN THE CYLINDERS INCLUDING FLUID LINES INTERCONNECTING THE CYLINDERS ON OPPOSITE SIDES OF EACH PISTON THEREIN, EACH SUCH LINE HAVING A COMMON CONNECTION TO A FLUID PUMPING SYSTEM, EACH PISTON BEING LIMITED IN ITS MOVEMENT TO CASING SUSPENDING POSITION, ALL OF SAID PISTONS HAVING SUBSTANTIALLY EQUAL PRESSURE RESPONSIVE AREAS THEREON AND ALL OF SAID PISTON STEMS HAVING CASING ENGAGING MEANS ON THEIR INNER ENDS EXTENDING
References Cited (Backward Citations)
US1988442A
Cited
US2094690A
Cited
US2187839A
Cited
US2282758A
Cited
US2909359A
Cited
US2891770A
Cited
US2939683A
Cited
US3017931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |