US3688115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole fluid density logging tool with non-turbulent measuring chamber flow
Assignee: Schlumberger Technology Corp
•
Filing: 1970-06-08
•
Granted: 1972-08-29
•
Expires: 1990-06-08
Abstract
Abstract A specific embodiment of the invention provides an improved fluid density measuring device for use in producing oil wells. Density is determined by forcing the well fluid to pass through a chamber in the device. The fluid attenuates a beam of gamma radiation that traverses the chamber, the relative changes in the beam intensity providing a measure of the density in question. Streamline surfaces and passageways leading into and out of the chamber eliminate turbulent flow conditions within the measuring chamber and thereby establish the basis for a substantially more accurate log of the production fluid density.
Inventors
- 👤 Stephen Antkiw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:50
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A density logging tool for use in a borehole through which fluids are flowing, comprising a source of gamma radiation, a gamma radiation detector spaced from said source, nozzle means for promoting non-turbulent flow conditions past said source, and further nozzle means spaced from said source for promoting nonturbulent flow conditions in the space between said source and said detector.
Claim 2
Dependent Claim
60 words
A density logging tool for use in a borehole through which fluids are flowing, comprising a source of gamma radiation, a gamma radiation detector spaced from said source, nozzle means for promoting non-turbulent flow conditions past said source, and further nozzle means spaced from said source for promoting nonturbulent flow conditions in the space between said source and said detector.
Claim 3
Dependent Claim
34 words
A tool according to claim 1, further comprising an end member having a surface of revolution formed thereon and adjacent To said spaced nozzle means for enhancing non-turbulent fluid discharge from said nozzle means.
Claim 4
Dependent Claim
30 words
A tool according to claim 2 wherein said gamma ray detection means is spaced from said end member means in a direction that is away from said gamma radiation source.
Claim 5
Dependent Claim
98 words
A gamma ray density production logging tool comprising a housing, a tungsten liner within said housing having a passage therethrough, a gamma radiation source in said housing and adjacent to one end of said tungsten lined passage, nozzle means formed between said gamma radiation source and said housing and said tungsten liner for establishing laminar flow conditions into said passage and further nozzle means formed in the opposite end of said tungsten lined passage, said further nozzle means establishing laminar flow conditions for fluid discharge therefrom, and a radiation detection means located proximate to said further nozzle means.
Claim 6
Dependent Claim
98 words
A gamma ray density production logging tool comprising a housing, a tungsten liner within said housing having a passage therethrough, a gamma radiation source in said housing and adjacent to one end of said tungsten lined passage, nozzle means formed between said gamma radiation source and said housing and said tungsten liner for establishing laminar flow conditions into said passage and further nozzle means formed in the opposite end of said tungsten lined passage, said further nozzle means establishing laminar flow conditions for fluid discharge therefrom, and a radiation detection means located proximate to said further nozzle means.
Claim 7
Dependent Claim
46 words
A tool according to claim 4, further comprising an end member adjacent to and forming a part of said further nozzle means and having a surface of revolution formed thereon in order to establish streamline flow conditions from said passage and into said further nozzle means.
Claim 8
Dependent Claim
29 words
A tool according to claim 5 wherein said radiation detection means comprises a scintillation crystal spaced from said end member in a direction away from said gamma ray source.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |