US3762485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the prevention of balling
Assignee: Milchem Inc
•
Filing: 1972-09-05
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Granted: 1973-10-02
•
Expires: 1992-09-05
Abstract
Abstract A process for the prevention of balling while drilling subterranean wells wherein the surface of drilling equipment is exposed to an aqueous circulating system having present therein a polyvalent metal ion, said ion being complexed by an organic complexing component, all as hereinafter described.
Inventors
- 👤 B Chesser
- 👤 F Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:22
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The process of claim 1 wherein the polyvalent metal ion is aluminum.
Claim 2
Dependent Claim
12 words
The process of claim 1 wherein the complexing component is citric acid.
Claim 3
Dependent Claim
104 words
A process for the prevention of balling of formation cuttings upon the surface of drilling equipment used in conjunction with drilling, workover, and completion of a subterranean well, comprising the steps of: A. Preparing an aqueous alkaline system; B. Adding to said sysTem a polyvalent metal ion, said ion being complexed with a complexing component selected from the class consisting of acetic, citric, formic, lactic, oxalic and tartaric acids, the alkali metal and ammonium salts and mixtures thereof; C. Circulating the system into, throughout and out of a subterranean bore hole; D. Contacting formation cuttings with the complexed metal ion in the circulating system.
Claim 4
Dependent Claim
12 words
The process of claim 4 wherein the polyvalent metal ion is aluminum.
Claim 5
Dependent Claim
12 words
The process of claim 4 wherein the complexing component is citric acid.
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |