US2761218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill hole inclinometer
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-03-23
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Granted: 1956-09-04
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Walter J Bielstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:23
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/0236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A BOREHOLE INCLINOMETER COMPRISING, IN COMBINATION, A SECTION OF PIPE ADAPTED TO BE ARRANGED IN AND FORM A PART OF THE DRILL STEM, A VALVE ASSEMBLY CONSISTING OF A FIXED PART AND A MOVABLE PART MOUNTED IN SAID SECOND OF PIPE, SAID MOVABLE PART BEING ARRANGED TO ASSUME A FIRST POSITION IN WHICH THE VALVE ASSEMBLY HAS A PREDETERMINED FLOW AREA AND LONGITUDINALLY MOVABLE UNDER THE INFLUENCE OF FLUID PRESSURE IN SAID SECTION OF PIPE FROM THE FIRST POSITION TO A SECOND POSITION WHILE MAINTAINING SAID FLOW AREA SUBSTANTIALLY CONSTANT AND LONGITUDINALLY MOVABLE FROM SAID SECOND TO A THIRD POSITION WHERE THE VALVE HAS A LESSER FLOW AREA, A PENDULUM MOUNTED BY A UNIVERSAL JOINT ON SAID MOVABLE PART AND HAVING A FIRST STOP AND A SECOND STOP SURFACE, FIRST AND SECOND STOP MEMBERS MECHANICALLY CONNECTED TO SAID SECTION OF DRILL PIPE WITH SAID FIRST STOP MEMBER LONGITUDINALLY SPACED FROM THE FIRST STOP SURFACE OF THE PENDULUM WHEN THE MOVABLE PART OF THE VALVE ASSEMBLY IS IN ITS FIRST POSITION A DISTANCE APPROXIMATELY EQUAL TO THE LONGITUDINAL DISTANCE BETWEEN THE FIRST AND SECOND POSITIONS OF THE MOVABLE PART OF THE VALVE ASSEMBLY AND SAID SECOND STOP MEMBER LONGITUDINALLY SPACED FROM THE SECOND STOP OF THE PENDULUM A LONGITUDINAL DISTANCE SUBSTANTIALLY EQUAL TO THE LONGITUDINAL DISTANCE BETWEEN THE FIRST AND THIRD POSITIONS OF THE MOVABLE PART OF THE
Claim 2
Dependent Claim
227 words
A BOREHOLE INCLINOMETER COMPRISING, IN COMBINATION, A SECTION OF PIPE ADAPTED TO BE ARRANGED IN AND FORM A PART OF THE DRILL STEM, A VALVE ASSEMBLY CONSISTING OF A FIXED PART AND A MOVABLE PART MOUNTED IN SAID SECOND OF PIPE, SAID MOVABLE PART BEING ARRANGED TO ASSUME A FIRST POSITION IN WHICH THE VALVE ASSEMBLY HAS A PREDETERMINED FLOW AREA AND LONGITUDINALLY MOVABLE UNDER THE INFLUENCE OF FLUID PRESSURE IN SAID SECTION OF PIPE FROM THE FIRST POSITION TO A SECOND POSITION WHILE MAINTAINING SAID FLOW AREA SUBSTANTIALLY CONSTANT AND LONGITUDINALLY MOVABLE FROM SAID SECOND TO A THIRD POSITION WHERE THE VALVE HAS A LESSER FLOW AREA, A PENDULUM MOUNTED BY A UNIVERSAL JOINT ON SAID MOVABLE PART AND HAVING A FIRST STOP AND A SECOND STOP SURFACE, FIRST AND SECOND STOP MEMBERS MECHANICALLY CONNECTED TO SAID SECTION OF DRILL PIPE WITH SAID FIRST STOP MEMBER LONGITUDINALLY SPACED FROM THE FIRST STOP SURFACE OF THE PENDULUM WHEN THE MOVABLE PART OF THE VALVE ASSEMBLY IS IN ITS FIRST POSITION A DISTANCE APPROXIMATELY EQUAL TO THE LONGITUDINAL DISTANCE BETWEEN THE FIRST AND SECOND POSITIONS OF THE MOVABLE PART OF THE VALVE ASSEMBLY AND SAID SECOND STOP MEMBER LONGITUDINALLY SPACED FROM THE SECOND STOP OF THE PENDULUM A LONGITUDINAL DISTANCE SUBSTANTIALLY EQUAL TO THE LONGITUDINAL DISTANCE BETWEEN THE FIRST AND THIRD POSITIONS OF THE MOVABLE PART OF THE
References Cited (Backward Citations)
US2435934A
Cited
US2329732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |