US3578092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling tools
Assignee: Hoechst AG
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Filing: 1966-02-11
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Granted: 1971-05-11
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Expires: 1986-02-11
Abstract
Abstract A drilling tool has been provided which has a gastight cavity therein, the entrance of which cavity is preferably positioned away from a wear surface of the tool and which cavity contains krypton 85 as a wear indicating means either for a bearing wear surface or for an abrasive drilling wear surface. The indicating means are activated when, because of wear, the cavity is punctured and krypton 85 escapes or is expelled by means of auxiliary agents. The method of marking the tools as well as the tools thus marked are within the scope of the invention. Further, the improvement in the method of drilling deep bore holes with a tool possessing these indicating means is similarly within the scope of the disclosed invention.
Inventors
- 👤 Hans-Jurgen Tesch
- 👤 Gunther Haverkamp
- 👤 Herbert Becker
- 👤 Hans Gotte
- 👤 Alexander Wacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
E; E21; E21B; E21B12/00; E21B12/02; B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0957
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
48 words
A drilling tool containing in a closed cavity therein krypton85 or a compound thereof, as a gaseous nonionogenic the cavity being so positioned in the tool that the krypton85 or the compound thereof is liberated when the tool has been subjected to the highest permissible amount of wear.
Claim 2
Dependent Claim
48 words
A drilling tool containing in a closed cavity therein krypton85 or a compound thereof, as a gaseous nonionogenic the cavity being so positioned in the tool that the krypton85 or the compound thereof is liberated when the tool has been subjected to the highest permissible amount of wear.
Claim 3
Dependent Claim
19 words
A tool as claimed in claim 1, wherein the krypton85 is present in the form of an inclusion compound.
Claim 4
Dependent Claim
19 words
A tool as claimed in claim 1, wherein the krypton85 is present in the form of a hydroquinone clathrate.
Claim 5
Dependent Claim
41 words
A process for marking a drilling tool to indicate when the highest permissible amount of wear has taken place, the improvement of which comprises inserting in a cavity in the tool krypton85 or a compound thereof as a gaseous nonionogenic indicator.
Claim 6
Dependent Claim
41 words
A process for marking a drilling tool to indicate when the highest permissible amount of wear has taken place, the improvement of which comprises inserting in a cavity in the tool krypton85 or a compound thereof as a gaseous nonionogenic indicator.
Claim 7
Dependent Claim
19 words
A process as claimed in claim 11, wherein the krypton85 is present in the form of an inclusion compound.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 11, wherein the krypton85 is present in the form of a hydroquinone clathrate.
Claim 9
Dependent Claim
108 words
In a process for marking tools and instruments for drilling deep wells with the aid of a circulating drilling fluid using radioactive tracer substances which serve to indicate the occurrence of the highest permissible amount of wear and which are embedded in bore holes in the tools or instruments in such a manner that upon the occurrence of the highest permissible amount of wear, these tracer substances occur in the circulating fluid and with it are carried to the earth''s surface, the improvement which comprises using krypton85 as a gaseous nonionogenic radioactive tracer substance in conjunction with a propellant expelling the same from the tool into thE fluid.
Claim 10
Dependent Claim
108 words
In a process for marking tools and instruments for drilling deep wells with the aid of a circulating drilling fluid using radioactive tracer substances which serve to indicate the occurrence of the highest permissible amount of wear and which are embedded in bore holes in the tools or instruments in such a manner that upon the occurrence of the highest permissible amount of wear, these tracer substances occur in the circulating fluid and with it are carried to the earth''s surface, the improvement which comprises using krypton85 as a gaseous nonionogenic radioactive tracer substance in conjunction with a propellant expelling the same from the tool into thE fluid.
Claim 11
Dependent Claim
19 words
A process as claimed in claim 7, wherein the krypton85 is present in the form of an inclusion compound.
Claim 12
Dependent Claim
19 words
A process as claimed in claim 7, wherein the krypton85 is present in the form of a hydroquinone clathrate.
Claim 13
Dependent Claim
132 words
In a process for drilling deep bore holes by means of a drilling tool containing indicating means said drilling being aided by a fluid, the improvement which comprises: a. placing in the tool in a gastight cavity krypton 85 and an agent to expel from the tool krypton85 if needed, said cavity being placed at a distance away from a wear surface with a filling opening away from said wear surface for filling said cavity in the tool, said distance corresponding to the permissible amount of wear of said surface, b. indicating a permissible amount of wear of the drilling tool by puncturing said compartment by abrasive wear of said tool, and c. recording a wear indicating occurrence of said krypton85 aided by the drilling fluid acting as a carrier for krypton85.
Claim 14
Dependent Claim
132 words
In a process for drilling deep bore holes by means of a drilling tool containing indicating means said drilling being aided by a fluid, the improvement which comprises: a. placing in the tool in a gastight cavity krypton 85 and an agent to expel from the tool krypton85 if needed, said cavity being placed at a distance away from a wear surface with a filling opening away from said wear surface for filling said cavity in the tool, said distance corresponding to the permissible amount of wear of said surface, b. indicating a permissible amount of wear of the drilling tool by puncturing said compartment by abrasive wear of said tool, and c. recording a wear indicating occurrence of said krypton85 aided by the drilling fluid acting as a carrier for krypton85.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |