Patent US2826533A successfully refreshed from Google Patents.
Patent US4381667A successfully refreshed from Google Patents.
US4381667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of borehole temperature
Assignee: Individual
•
Filing: 1981-04-29
•
Granted: 1983-05-03
•
Expires: 2001-04-29
Abstract
Abstract A borehole survey tool of the type having a chamber for receiving a borehole survey instrument, and a shock absorbing assembly for supporting the survey instrument in the chamber, said shock absorbing assembly including a substantially helical return spring, and wherein there is provided elements for measuring borehole temperature comprising a maximum temperature registering thermometer mountable within a casing, the casing having a body portion and a shoulder portion, the casing being mountable in the borehole survey tool with the body portion received within the helical spring and the shoulder portion interposed between the survey instrument or an element of the survey tool and the adjacent end of the helical spring.
Inventors
- 👤 Thomas L. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:19
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/08; E; E21; E21B; E21B47/00; E21B47/06; E21B47/07; G01K1/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A borehole survey tool of the type having a chamber, a borehole survey instrument in said chamber, and a shock absorbing assembly for supporting the survey instrument in the chamber, said shock absorbing assembly including a substantially helical return spring for exerting a biasing force on said survey instrument, and wherein there is provided means for measuring borehole temperature comprising a casing defining a passage, a maximum temperature registering thermometer mountable within said casing passage, said casing having a body portion and a shoulder portion, said casing being mountable in the borehole survey tool casing with the body portion received within the helical spring and the shoulder portion being engaged with one end of said helical spring.
Claim 2
Dependent Claim
117 words
A borehole survey tool of the type having a chamber, a borehole survey instrument in said chamber, and a shock absorbing assembly for supporting the survey instrument in the chamber, said shock absorbing assembly including a substantially helical return spring for exerting a biasing force on said survey instrument, and wherein there is provided means for measuring borehole temperature comprising a casing defining a passage, a maximum temperature registering thermometer mountable within said casing passage, said casing having a body portion and a shoulder portion, said casing being mountable in the borehole survey tool casing with the body portion received within the helical spring and the shoulder portion being engaged with one end of said helical spring.
Claim 3
Dependent Claim
20 words
A borehole survey tool as claimed in claim 1 wherein the thermometer is supported in the casing by cushioning means.
Claim 4
Dependent Claim
50 words
A borehole survey tool as claimed in claim 2 wherein the body portion of the casing is tubular, each end of the passage is the body portion being closed by an end cap detachably engagable with the body portion and wherein one of said end caps defines said shoulder portion.
Claim 5
Dependent Claim
130 words
A borehole survey tool as claimed in claim 3 wherein the passage is formed with an inclined step in its side wall adjacent one end thereof, said thermometer having a transition portion between a bulb and a graduated stem the transition portion tapering inwardly toward said bulb, the transition portion of the thermometer being disposed adjacent said inclined step in said side wall when said thermometer is mounted in said casing, and wherein said cushioning means includes a resilient support fitted between the transition portion and said inclined step to provide lateral and axial support for said bulb end of said thermometer, a resilient seat providing axial support for the end of said thermometer remote from said bulb, and resilient means providing lateral support for said stem of said thermometer.
Claim 6
Dependent Claim
40 words
A borehole survey tool as claimed in claim 4 wherein the resilient seat comprises a pad which in use bears against said end of the thermometer, and a compression spring disposed between the pad and a portion of the casing.
Claim 7
Dependent Claim
28 words
A borehole survey tool as claimed in claim 4 wherein the resilient means comprises a plurality of spaced resilient packing elements positioned between the thermometer and the casing.
Claim 8
Dependent Claim
27 words
A borehole survey tool as claimed in claim 4 wherein the bulb of the thermometer is at least partially embedded in a substantially soft thermally conductive composition.
Claim 9
Dependent Claim
25 words
A borehole survey tool as claimed in claim 3 wherein the passage is shaped so as to generally conform to the shape of the thermometer.
References Cited (Backward Citations)
US2222829A
Cited
US2879666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |