US4367651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducer body
Assignee: Schlumberger Technology Corp
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Filing: 1981-03-30
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Granted: 1983-01-11
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Expires: 2001-03-30
Abstract
Abstract A pressure transducer body is described which has a bore running its length and contains (a) a means for receiving a pressure transducer, (b) a fluid reservoir, (c) a stationary elastic plug member having embedded therein a T-shaped rigid pin member, and (d) a chamber for receiving a fluid under pressure. The elements of the transducer body are combined in such a way that pressures of fluids flowing into chamber (d) are accurately measured using conventional pressure transducers even at very high pressures (e.g. 20,000 psi). More importantly, perhaps, the configuration of the transducer body permits accurate pressure measurements on pressurized fluids which are corrosive and/or abrasive. This makes the pressure transducer bodies particularly useful in the oilfield service industries for measuring the pressure of acidizing or hydraulic fracturing fluids used in stimulation.
Inventors
- 👤 Donald C. Cameron
- 👤 Donnie L. Stufflebeam
- 👤 John W. Ekey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0672; E; E21; E21B; E21B47/00; E21B47/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
299 words
A pressure transducer body having a first end and a second end defining a bore of generally circular crosssection which extends, along with its axis of generation, from the first end to the second end, and having (a) means for receiving a pressure transducer, (b) a fluid reservoir, (c) a stationary elastic plug member, and (d) a chamber for receiving a fluid under pressure; said means for receiving a pressure transducer, (a), being located near the first end of said transducer body and in fluid communication with said fluid reservoir, said fluid reservoir, (b), being defined within said bore and being located between said means for receiving a pressure transducer, (a), and said stationary elastic plug member, said stationary elastic plug member, (c), having a first end in fluid communication with said fluid reservoir (b), and a second end adjacent to said chamber for receiving a fluid under pressure, said chamber for receiving a fluid under pressure, (d), being defined within said bore, said plug member (c) also having a rigid pin member, (p), embedded therein; said pin member, (p), being defined by an elongate shaft extending partially through said stationary elastic plug (c), and positioned coaxial to the bore and having (i) a first end disposed toward said fluid reservoir, (b), and defining a flat or substantially flat face which is positioned perpendicular to the bore, and (ii) a second end disposed toward said chamber for receiving a fluid under pressure (d), said second end having an attached head which is external to said plug member, (c), and which has a flat or substantially flat face positioned perpendicular to the bore, the flat face of the head having a surface area greater than a cross-sectional area of the shaft but less than a cross-sectional area of the bore.
Claim 2
Dependent Claim
299 words
A pressure transducer body having a first end and a second end defining a bore of generally circular crosssection which extends, along with its axis of generation, from the first end to the second end, and having (a) means for receiving a pressure transducer, (b) a fluid reservoir, (c) a stationary elastic plug member, and (d) a chamber for receiving a fluid under pressure; said means for receiving a pressure transducer, (a), being located near the first end of said transducer body and in fluid communication with said fluid reservoir, said fluid reservoir, (b), being defined within said bore and being located between said means for receiving a pressure transducer, (a), and said stationary elastic plug member, said stationary elastic plug member, (c), having a first end in fluid communication with said fluid reservoir (b), and a second end adjacent to said chamber for receiving a fluid under pressure, said chamber for receiving a fluid under pressure, (d), being defined within said bore, said plug member (c) also having a rigid pin member, (p), embedded therein; said pin member, (p), being defined by an elongate shaft extending partially through said stationary elastic plug (c), and positioned coaxial to the bore and having (i) a first end disposed toward said fluid reservoir, (b), and defining a flat or substantially flat face which is positioned perpendicular to the bore, and (ii) a second end disposed toward said chamber for receiving a fluid under pressure (d), said second end having an attached head which is external to said plug member, (c), and which has a flat or substantially flat face positioned perpendicular to the bore, the flat face of the head having a surface area greater than a cross-sectional area of the shaft but less than a cross-sectional area of the bore.
Claim 3
Dependent Claim
24 words
The pressure transducer body defined by claim 1 wherein the shaft and attached head of said pin member each have a circular cross section.
Claim 4
Dependent Claim
17 words
The pressure transducer body defined by claim 1 additionally comprising a non-compressible hydraulic fluid which fills (b).
Claim 5
Dependent Claim
17 words
The pressure transducer body defined by claim 3 additionally comprising a pressure transducer in operational communication therewith.
Claim 6
Dependent Claim
37 words
The pressure transducer body defined by any one of claims 1, 2, 3 or 4 wherein the elongate shaft of said pin member terminates at a point near the first end of said stationary elastic plug member.
References Cited (Backward Citations)
CA593563A
Cited
US1243843A
Cited
US2216374A
Cited
US2353191A
Cited
FR1004147A
Cited
US3255633A
Cited
US3718046A
Cited
US3971217A
Cited
GB1401925A
Cited
SU548775A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |