US3906471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High side meter
Assignee: Baroid Technology Inc
•
Filing: 1973-09-12
•
Granted: 1975-09-16
•
Expires: 1993-09-12
Abstract
Abstract A capacitive-type inclinometer cell, which rotates with the drill pipe, is located in a wellbore. A capacity transmitter, located downhole near the inclinometer, converts the capacity changes of the inclinometer into a rectangular wave which can be transmitted to the surface. At the surface, an electronic unit converts the rectangular wave into a voltage which can be displayed on a meter calibrated to read degrees.
Inventors
- 👤 Elbert N Shawhan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:56
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/22; E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/12; G01; G01C; G01C9/00; G01C9/02; G01C9/06; G01C9/18
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
99 words
In a telemetering system, an inclination sensing arrangement comprising: a sealed housing; means in the housing providing first and second capacitances; dielectric means in said housing for varying the value of said first capacitance in response to variations in the value of inclination, whereby the value of said first capacitance is representative of the value of said inclination; circuit means for generating a rectangular vave voltage; and circuit means coupling said first and second capacitances to said generating circuit means, for varying the time duration of one polarity of said rectangular wave voltage in proportion to said first capacitance.
Claim 2
Dependent Claim
99 words
In a telemetering system, an inclination sensing arrangement comprising: a sealed housing; means in the housing providing first and second capacitances; dielectric means in said housing for varying the value of said first capacitance in response to variations in the value of inclination, whereby the value of said first capacitance is representative of the value of said inclination; circuit means for generating a rectangular vave voltage; and circuit means coupling said first and second capacitances to said generating circuit means, for varying the time duration of one polarity of said rectangular wave voltage in proportion to said first capacitance.
Claim 3
Dependent Claim
34 words
Telemetering system according to claim 1, including also means receptive of said rectangular voltage wave for generating a voltage representative of the time duration of a preselected one of said portions of said wave.
Claim 4
Dependent Claim
39 words
Telemetering system according to claim 1, including also means receptive of said rectangular voltage wave for generating a voltage representative of the difference between the time durations of said negative portion and of said positive portion of said wave.
Claim 5
Dependent Claim
31 words
Arrangement defined in claim 1, wherein said dielectric means varies the value of each of said first and second capacitances in response to variations in the value of said physical quantity.
Claim 6
Dependent Claim
32 words
Arrangement of claim 4, wherein said first and second capacitances are varied in opposite senses by said dielectric means, thereby to maintain the sum of said first and second capacitances substantially constant.
Claim 7
Dependent Claim
61 words
Arrangement defined in claim 1, wherein said dielectric means varies the value of each of said first and second capacitances in response to variations in the value of said physical quantity; said system including also means receptive of said rectangular voltage wave for producing a voltage representative of the time duration of a preselected one of said portions of said wave.
Claim 8
Dependent Claim
32 words
Arrangement of claim 6, wherein said first and second capacitances are varied in opposite senses by said dielectric means, thereby to maintain the sum of said first and second capacitances substantially constant.
Claim 9
Dependent Claim
30 words
Arrangement defined in claim 1, wherein the capacitance providing means comprises a pair of capacitance plates spaced apart from each other and from the housing and contacting the dielectric means.
Claim 10
Dependent Claim
29 words
Arrangement of claim 8, wherein the dielectric means varies the capacitance of each of said plates, relative to the housing, in response to the physical quantity to be measured.
Claim 11
Dependent Claim
32 words
Arrangement of claim 9, wherein said first and second capacitances are varied in opposite senses by said dielectric means, thereby to maintain the sum of said first and second capacitances substantially constant.
Claim 12
Dependent Claim
86 words
Arrangement defined in claim 1, wherein the providing and varying means comprises a cylindrical metallic housing, a circular channel within said housing and concentric with the axis thereof, a body of a dielectric liquid in said channel forming a liquid pendulum, and a first metallic plate fixedly mounted in and electrically insulated from said housing and extending into said channel into contact with said liquid, whereby rotation of said housing about its axis results in a variation of the capacitance between said plate and said housing.
Claim 13
Dependent Claim
60 words
Arrangement recited in claim 11, including also an additional metallic plate fixedly mounted in said housing and electrically insulated from said housing and from said first plate and extending into said channeL into contact with said liquid, whereby rotation of said housing about its axis results in a variation of the capacitance between each of said plates and said housing.
Claim 14
Dependent Claim
36 words
Arrangement of claim 12, wherein said plates are disposed respectively on opposite sides of said axis, thereby to result in variation of the capacitances in opposite senses upon a rotation of the housing about its axis.
Claim 15
Dependent Claim
29 words
System according to claim 13, including also means for producing a voltage representative of the time duration of a preselected one of said portions of said rectangular voltage wave.
Claim 16
Dependent Claim
78 words
An inclination sensor, comprising: a container; a dielectric fluid partially filling the container; capacitive plate means in the container positioned perpendicular to a horizontal axis on which inclination is to be sensed, said plate means being positioned in a capacitive relationship with a surface of said container and being shaped to have an amount of surface area in the fluid which varies with said angle; and oscillatory means for generating signals indicative of capacitance of said capacity relationship.
Claim 17
Dependent Claim
78 words
An inclination sensor, comprising: a container; a dielectric fluid partially filling the container; capacitive plate means in the container positioned perpendicular to a horizontal axis on which inclination is to be sensed, said plate means being positioned in a capacitive relationship with a surface of said container and being shaped to have an amount of surface area in the fluid which varies with said angle; and oscillatory means for generating signals indicative of capacitance of said capacity relationship.
Claim 18
Dependent Claim
27 words
Apparatus of claim 15 wherein the plate means comprises two plates, one on each side of the axis and each being a mirror image of the other.
Claim 19
Dependent Claim
103 words
Apparatus for sensing an inclination angle, comprising: a container; a dielectric fluid partially filling the container; a capacitive plate arrangement in the container having two plates spaced about and lying in a plane perpendicular to a horizontal axis on which the angle is to be sensed, said plate being positioned with one on each side of said axis and each being a mirror image of the other and said plate arrangement being positioned in a capacitive relationship with the surface of said container; and oscillatory means in communication with the two plates for generating signals indicative of said capacitive relationship of said plates.
Claim 20
Dependent Claim
103 words
Apparatus for sensing an inclination angle, comprising: a container; a dielectric fluid partially filling the container; a capacitive plate arrangement in the container having two plates spaced about and lying in a plane perpendicular to a horizontal axis on which the angle is to be sensed, said plate being positioned with one on each side of said axis and each being a mirror image of the other and said plate arrangement being positioned in a capacitive relationship with the surface of said container; and oscillatory means in communication with the two plates for generating signals indicative of said capacitive relationship of said plates.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |