Patent CH241627A successfully refreshed from Google Patents.
US5389883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of gas and water content in oil
Assignee: ABB AS Norway
•
Filing: 1993-09-16
•
Granted: 1995-02-14
•
Expires: 2013-09-16
Abstract
Abstract In order to measure the relative proportions of oil, water and gas passing along a pipe, the pipe is passed through the coils of a number of coil resonators having different resonant frequencies. By measuring changes in the resonant frequencies of the coil resonators the proportions of oil, water and gas in the flow through the pipe can be calculated.
Inventors
- 👤 Richard Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
G; G01; G01N; G01N22/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
Apparatus for measuring the relative proportions of dissimilar fluids within a pipe, comprising: a plurality of coil resonators with different resonant frequencies surrounding the pipe with the pipe passing through the coils of the coil resonators, the coil resonators being split into a plurality of groups each comprising a plurality of coil resonators having the same natural resonant frequency, the resonators of the different groups having different natural resonant frequencies; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation at a plurality of different frequencies into the coil resonators; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by each of the coil resonators.
Claim 2
Dependent Claim
107 words
Apparatus for measuring the relative proportions of dissimilar fluids within a pipe, comprising: a plurality of coil resonators with different resonant frequencies surrounding the pipe with the pipe passing through the coils of the coil resonators, the coil resonators being split into a plurality of groups each comprising a plurality of coil resonators having the same natural resonant frequency, the resonators of the different groups having different natural resonant frequencies; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation at a plurality of different frequencies into the coil resonators; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by each of the coil resonators.
Claim 3
Dependent Claim
47 words
Apparatus as claimed in claim 1, in which the coil resonators are all offset from the pipe, all of the coil resonators in each group being offset by the same amount and the coil resonators of each group being spaced at equal angular intervals around the pipe.
Claim 4
Dependent Claim
17 words
Apparatus as claimed in claim 1, in which sixteen resonators in two groups of eight are used.
Claim 5
Dependent Claim
14 words
Apparatus as claimed in claim 1, in which the electromagnetic radiation is microwave radiation.
Claim 6
Dependent Claim
16 words
Apparatus as claimed in claim 1, in which the dissimilar fluids are oil, water and gas.
Claim 7
Dependent Claim
75 words
Apparatus for measuring the relative proportions of oil, water and gas within a pipe, comprising: a plurality of coil resonators with different resonant frequencies surrounding the pipe with the pipe passing through the coils of the coil resonators; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation at a plurality of different frequencies into the coil resonators; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by each of the coil resonators.
Claim 8
Dependent Claim
75 words
Apparatus for measuring the relative proportions of oil, water and gas within a pipe, comprising: a plurality of coil resonators with different resonant frequencies surrounding the pipe with the pipe passing through the coils of the coil resonators; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation at a plurality of different frequencies into the coil resonators; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by each of the coil resonators.
Claim 9
Dependent Claim
96 words
Apparatus for measuring the relative proportions of dissimilar fluids within a pipe having an axis, comprising: a first coil resonator which includes means for providing a first resonant cavity, the pipe passing through the first resonant cavity, and a first coil inside the first resonant cavity and around the pipe, the first coil having an axis which is displaced from the axis of the pipe; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation into the first coil resonator; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by the first coil resonator.
Claim 10
Dependent Claim
96 words
Apparatus for measuring the relative proportions of dissimilar fluids within a pipe having an axis, comprising: a first coil resonator which includes means for providing a first resonant cavity, the pipe passing through the first resonant cavity, and a first coil inside the first resonant cavity and around the pipe, the first coil having an axis which is displaced from the axis of the pipe; a variable frequency source of electromagnetic radiation for sending electromagnetic radiation into the first coil resonator; and an electromagnetic radiation sensor for measuring electromagnetic radiation emitted by the first coil resonator.
Claim 11
Dependent Claim
69 words
Apparatus as claimed in claims 7, further comprising a second coil resonator which includes means for providing a second resonant cavity, the pipe passing through the second resonant cavity, and a second coil inside the second resonant cavity and around the pipe, the second coil having an axis which is displaced from the axis of the pipe and which is also displaced from the axis of the first coil.
Claim 12
Dependent Claim
19 words
Apparatus as claimed in claim 8, wherein the first and second coil resonators have the same natural resonant frequency.
Claim 13
Dependent Claim
18 words
Apparatus as claimed in claim 8, wherein the first and second coil resonators have different natural resonant frequencies.
Claim 14
Dependent Claim
15 words
Apparatus as claimed in claim 7, wherein the dissimilar fluids are oil, water and gas.
References Cited (Backward Citations)
GB2120791A
Cited
US5101163A
Cited
JPH03144351A
Cited
EP0508854A1
Cited
US5241279A
Cited
US5157339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |