Patent US3817094A successfully refreshed from Google Patents.
US3817094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well monitoring apparatus
Assignee: Mobil Oil AS
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Filing: 1970-07-27
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Granted: 1974-06-18
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Expires: 1990-07-27
Abstract
Abstract Method and apparatus for monitoring the operation of a well which is produced by a beam pumping unit. A load transducer is secured to the surface support structure of the beam pumping unit such that it generates a signal representative of load changes in the support structure as the walking beam is reciprocated. The transducer may take the form of an elongated bar which is secured to the support structure by longitudinally spaced rigid connections. The transducer bar as disclosed is mounted on the top of the walking beam.
Inventors
- 👤 R Montgomery
- 👤 J Stoltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:03
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; E; E21; E21B; E21B47/00; E21B47/008; E21B47/009
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
95 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and a walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, and transducer Means secured to the top of said beam at a location between said pivotal mounting and the connection between said beam and said rod string for generating a signal representative of load changes in said beam as it is reciprocated.
Claim 2
Dependent Claim
95 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and a walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, and transducer Means secured to the top of said beam at a location between said pivotal mounting and the connection between said beam and said rod string for generating a signal representative of load changes in said beam as it is reciprocated.
Claim 3
Dependent Claim
109 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and a walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, and transducer means secured to said beam for generating a signal representative of load changes in said beam as it is reciprocated, said transducer means comprising an elongated bar secured to a surface of said beam by longitudinally spaced rigid connections and means responsive to deformation in said bar between said connections for generating said signal.
Claim 4
Dependent Claim
109 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and a walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, and transducer means secured to said beam for generating a signal representative of load changes in said beam as it is reciprocated, said transducer means comprising an elongated bar secured to a surface of said beam by longitudinally spaced rigid connections and means responsive to deformation in said bar between said connections for generating said signal.
Claim 5
Dependent Claim
16 words
The system of claim 2 wherein said bar is secured to the top of said beam.
Claim 6
Dependent Claim
17 words
The system of claim 3 wherein said bar is prestressed in tension with respect to said beam.
Claim 7
Dependent Claim
25 words
The system of claim 2 wherein at least a portion of said bar intermediate said rigid connections is offset from said surface of said beam.
Claim 8
Dependent Claim
19 words
The system of claim 2 wherein said rigid connections are spaced by a distance of at least 6 inches.
Claim 9
Dependent Claim
98 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and an I-shaped walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, an elongated transducer bar secured to the top flange of said walking beam by longitudinally spaced rigid connections, and means responsive to deformation in said bar between said connections for generating a signal representative of load changes in said beam as it is reciprocated.
Claim 10
Dependent Claim
98 words
In a system for monitoring a well produced by a downhole pump, the combination comprising: a surface support unit including a sampson post and an I-shaped walking beam pivotally mounted on said sampson post for reciprocal movement by a prime mover, a sucker rod string for operating said pump connected to said walking beam, an elongated transducer bar secured to the top flange of said walking beam by longitudinally spaced rigid connections, and means responsive to deformation in said bar between said connections for generating a signal representative of load changes in said beam as it is reciprocated.
Claim 11
Dependent Claim
22 words
The system of claim 7 wherein at least a portion of said bar intermediate said rigid connections is offset from said flange.
Claim 12
Dependent Claim
19 words
The system of claim 8 wherein said rigid connections are spaced by a distance of at least 6 inches.
Claim 13
Dependent Claim
29 words
The system of claim 9 wherein said bar includes a section of reduced cross section intermediate said rigid connections and said deformation responsive means is located on said section.
Claim 14
Dependent Claim
35 words
The system of claim 9 wherein said deformation responsive means comprises a plurality of strain gauges connected to form the arms of a wheatstone bridge and bonded to said bar alternately in tension and poisson.
Claim 15
Dependent Claim
27 words
The system of claim 11 further comprising an output circuit for said bridge including means for imposing an adjustable bias on the output signal from said bridge.
Claim 16
Independent Claim
58 words
An apparatus for monitoring the strain level in a well pumping rod string comprising: a pumping unit for actuating said rod string, said pumping unit including an oscillating beam and means pivotally supporting said beam and deformation responsive transducer means secured to said beam for generating a signal representative of load changes in said beam as it oscillates.
Claim 17
Independent Claim
58 words
An apparatus for monitoring the strain level in a well pumping rod string comprising: a pumping unit for actuating said rod string, said pumping unit including an oscillating beam and means pivotally supporting said beam and deformation responsive transducer means secured to said beam for generating a signal representative of load changes in said beam as it oscillates.
References Cited (Backward Citations)
US2163665A
Cited
US2691300A
Cited
US2920298A
Cited
US3102420A
Cited
US3199685A
Cited
US3359791A
Cited
US3343409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |