US3269462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydraulic pressure booster for borehole apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1964-03-17
•
Granted: 1966-08-30
•
Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
- 👤 Ulrich E Voetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
IN A WELL TOOL FOR USE IN WELL BORE, SAID TOOL HAVING HYDRAULICALLY OPERATED MEANS; A HYDRAULIC ACTUATING SYSTEM FOR APPLYING HYDRAULIC PRESSURE TO SAID HYDRAULICALLY OPERATED MEANS; SAID SYSTEM INCLUDING: A HOUSING HAVING A CYLINDER FORMING A BORE, SAID CYLINDER HAVING FLUID INLET AND OUTLET MEANS; PISTON MEANS SLIDABLY AND SEALINGLY RECEIVED IN SAID BORE INTERMEDIATE OF SAID INLET AND OUTLET MEANS; SAID INLET MEANS SERVING TO ADMIT FLUID UNDER PRESSURE TO ONE SIDE OF SAID PISTON MEANS; SAID OUTLET MEANS SERVING TO DISCHARGE FLUID FROM SAID CYLINDER TO SAID HYDRUALICALLY OPERATED MEANS; SAID PISTON MEANS AND CYLINDER HAVING PORTIONS OF DIFFERENT EFFECTIVE CROSS-SECTIONAL AREA SIZED FOR CREATING A PRESSURE DIFFERENTIAL BETWEEN SAID INLET AND OUTLET MEANS; AND MEANS FOR SELECTIVELY CHANGING THE
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |