Patent US2728557A successfully refreshed from Google Patents.
US2728557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling off-bottom position of pellet impact drill
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-07-15
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Granted: 1955-12-27
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Expires: 1973-07-15
Abstract
No abstract record available.
Inventors
- 👤 Eugene M Mcnatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B7/00; E21B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
AN APPARATUS FOR DRILLING A BORE HOLE IN THE EARTH BY PELLET IMPACT WHICH COMPRISES A TUBULAR SUPPORT MEMBER, A CYLINDER FIXED TO AND SURROUNDING SAID SUPPORT MEMBER, A NOZZLE BARREL SLIDABLY SURROUNDING SAID SUPPORT MEMBER, SAID NOZZLE BARREL TERMINATING BELOW SAID SUPPORT MEMBER IN A PRIMARY NOZZLE IN FLUID COMMUNICATION WITH THE BORE OF SAID SUPPORT MEMBER AND TERMINATING AT ITS UPER END IN A PISTON FITTING SLIDABLY WITHIN SAID CYLINDER IN A MANNER DEFINING A FIRST ANNULAR CHAMBER BELOW SAID PISTON BETWEEN SAID CYLINDER AND SAID NOZZLE BARREL AND A SECOND ANNULAR CHAMBER ABOVE SAID PISTON BETWEEN SAID CYLINDER AND SAID SUPPORT MEMBER, SAID CYLINDER HAVING A LOWER EXTERIOR PORT INTO SAID FIRST ANNULAR CHAMBER, AN UPPER EXTERIOR PORT INTO SAID SECOND ANNULAR CHAMBER AND A PASSAGEWAY ESTABLISHING FLUID COMMUNICATION BETWEEN SAID FIRST ANNULAR CHAMBER AND THE BORE OF SAID SUPPORT MEMBER, A SECONDARY NOZZLE FIXED TO SAID NOZZLE BARREL AND SPACED BELOW SAID PRIMARY NOZZLE, SAID SECONDARY NOZZLE INCLUDING A SEGMENT MOVABLE IN RESPONSE TO CHANGES IN THE PRESSURE DIFFERENTIAL ACROSS SAID SECONDARY NOZZLE, AND MEANS CONTROLLING THE OPENING OF SAID LOWER PORT IN RESPONSE TO THE MOTION OF SAID MOVABLE SEGMENT.
Claim 2
Independent Claim
195 words
AN APPARATUS FOR DRILLING A BORE HOLE IN THE EARTH BY PELLET IMPACT WHICH COMPRISES A TUBULAR SUPPORT MEMBER, A CYLINDER FIXED TO AND SURROUNDING SAID SUPPORT MEMBER, A NOZZLE BARREL SLIDABLY SURROUNDING SAID SUPPORT MEMBER, SAID NOZZLE BARREL TERMINATING BELOW SAID SUPPORT MEMBER IN A PRIMARY NOZZLE IN FLUID COMMUNICATION WITH THE BORE OF SAID SUPPORT MEMBER AND TERMINATING AT ITS UPER END IN A PISTON FITTING SLIDABLY WITHIN SAID CYLINDER IN A MANNER DEFINING A FIRST ANNULAR CHAMBER BELOW SAID PISTON BETWEEN SAID CYLINDER AND SAID NOZZLE BARREL AND A SECOND ANNULAR CHAMBER ABOVE SAID PISTON BETWEEN SAID CYLINDER AND SAID SUPPORT MEMBER, SAID CYLINDER HAVING A LOWER EXTERIOR PORT INTO SAID FIRST ANNULAR CHAMBER, AN UPPER EXTERIOR PORT INTO SAID SECOND ANNULAR CHAMBER AND A PASSAGEWAY ESTABLISHING FLUID COMMUNICATION BETWEEN SAID FIRST ANNULAR CHAMBER AND THE BORE OF SAID SUPPORT MEMBER, A SECONDARY NOZZLE FIXED TO SAID NOZZLE BARREL AND SPACED BELOW SAID PRIMARY NOZZLE, SAID SECONDARY NOZZLE INCLUDING A SEGMENT MOVABLE IN RESPONSE TO CHANGES IN THE PRESSURE DIFFERENTIAL ACROSS SAID SECONDARY NOZZLE, AND MEANS CONTROLLING THE OPENING OF SAID LOWER PORT IN RESPONSE TO THE MOTION OF SAID MOVABLE SEGMENT.
References Cited (Backward Citations)
US1659876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |