US3887474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a filler for drilling mud
Assignee: GEA Group AG
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Filing: 1972-08-03
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Granted: 1975-06-03
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Expires: 1992-08-03
Abstract
Abstract A process for producing a filler for upgrading drilling fluid, especially for supporting the strata of deep drill holes or bores of the type used for oil and subsurface exploration, comprises the steps of comminuting a sulfur-containing iron mineral which is roasted to a sulfur content of less than 2 percent by weight, neutralizing the comminuted product upon dispersion thereof in water, leaching soluble components from the material and drying the same. The oxidic roasted product is classified to a particle size below 75 microns and a particle size distribution such that no more than 50 percent (preferably less than 30 percent) is below a particle size of 10 microns. Preferably, the composition is classified in the following particle size distribution: 50-55 percent of a particle size between 30 and 75 microns, 10-15 percent of a particle size between 20 and 30 microns, 10-15 percent between 10 and 20 microns, and 20-30 percent in a particle size up to 10 microns.
Inventors
- 👤 Heinz Senfe
- 👤 Artur Bergmann
- 👤 Gerhard Dam
- 👤 Dieter Menzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:49
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/05; B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/44; B03B5/442; C22; C22B; C22B1/00; C22B1/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A process for producing a filler for drilling fluids, comprising the steps of: roasting an iron-and-sulphur-containing mineral mass to produce iron oxide solids containing less than 2 percent by weight sulphur; quenching the roasted solids from a temperature above 200*C in water to a temperature below 100*C; excluding any oxidizing atmosphere from the roasted solid during the quenching thereof; leaching and washing the quenched solids with water to remove water soluble components therefrom; and milling and classifying said solids to a particle size distribution below 75 microns, with no more than 50 percent of the particles thereof having a particle size below 10 microns to consititute said filler said solids are classified to a particle size distribution in the ranges of substantially: 50 to 55 percent 30 to 75 microns 10 to 15 percent 20 to 30 microns 10 to 15 percent 10 to 20 microns 20 to 30 percent up to 10 microns.
Claim 2
Dependent Claim
154 words
A process for producing a filler for drilling fluids, comprising the steps of: roasting an iron-and-sulphur-containing mineral mass to produce iron oxide solids containing less than 2 percent by weight sulphur; quenching the roasted solids from a temperature above 200*C in water to a temperature below 100*C; excluding any oxidizing atmosphere from the roasted solid during the quenching thereof; leaching and washing the quenched solids with water to remove water soluble components therefrom; and milling and classifying said solids to a particle size distribution below 75 microns, with no more than 50 percent of the particles thereof having a particle size below 10 microns to consititute said filler said solids are classified to a particle size distribution in the ranges of substantially: 50 to 55 percent 30 to 75 microns 10 to 15 percent 20 to 30 microns 10 to 15 percent 10 to 20 microns 20 to 30 percent up to 10 microns.
Claim 3
Dependent Claim
158 words
A PROCESS FOR PRODUCING A FILLER FOR DRILLING FLUIDS, COMPRISING THE STEPS OF: ROASTING AN IRON-AND-SULPHUR-CONTAINING MINERAL MASS TO PRODUCE IRON OXIDE SOLIDS CONTAINING LESS THAN 2 PERCENT BY WEIGHT SULPHUR; QUENCHING THE ROASTED SOLIDS FROM A TEMPERATUE ABOVE 200*C IN WATER TO A TEMPERATURE BELOW 100*C; EXCLUDING ANY OXIDIZING ATMOSPHERE FROM THE ROASTED SOLID DURING THE QUENCHING THEREOF; LEACHING AND WASHING THE QUENCHED SOLIDS WITH WATER TO REMOVE WATER SOLUBLE CONPONENTS THEREFROM; AND MILLING AND CLASSIFYING SAID SOLIDS TO A PARTICLE SIZE DISTRIBUTION BELOW 75 MICRONS, WITH NO MORE THAN 50 PERCENT OF THE PARTICLES THEREOF HAVING A PARTICLE SIZE BELOW 10 MICRONS TO CONSTITUTE SAID FILLER SAID SOLIDS ARE CLASSIFIED TO A PARTICLE SIZE DISTRIBUTION IN THE RANGES OF SUBSTANTIALLY: 50 TO 55 PERCENT =30 TO 75 MICONS 10 TO 15 PERCENT = 20 TO 30 MICRONS 10 TO 15 PERCENT = 10 TO 20 MICRONS 10 20 TO 30 PERCENT = UP TO 10 MICRONS.
Claim 4
Dependent Claim
158 words
A PROCESS FOR PRODUCING A FILLER FOR DRILLING FLUIDS, COMPRISING THE STEPS OF: ROASTING AN IRON-AND-SULPHUR-CONTAINING MINERAL MASS TO PRODUCE IRON OXIDE SOLIDS CONTAINING LESS THAN 2 PERCENT BY WEIGHT SULPHUR; QUENCHING THE ROASTED SOLIDS FROM A TEMPERATUE ABOVE 200*C IN WATER TO A TEMPERATURE BELOW 100*C; EXCLUDING ANY OXIDIZING ATMOSPHERE FROM THE ROASTED SOLID DURING THE QUENCHING THEREOF; LEACHING AND WASHING THE QUENCHED SOLIDS WITH WATER TO REMOVE WATER SOLUBLE CONPONENTS THEREFROM; AND MILLING AND CLASSIFYING SAID SOLIDS TO A PARTICLE SIZE DISTRIBUTION BELOW 75 MICRONS, WITH NO MORE THAN 50 PERCENT OF THE PARTICLES THEREOF HAVING A PARTICLE SIZE BELOW 10 MICRONS TO CONSTITUTE SAID FILLER SAID SOLIDS ARE CLASSIFIED TO A PARTICLE SIZE DISTRIBUTION IN THE RANGES OF SUBSTANTIALLY: 50 TO 55 PERCENT =30 TO 75 MICONS 10 TO 15 PERCENT = 20 TO 30 MICRONS 10 TO 15 PERCENT = 10 TO 20 MICRONS 10 20 TO 30 PERCENT = UP TO 10 MICRONS.
Claim 5
Dependent Claim
18 words
The process defined in claim 1 wherein said roasted solids are quenched from a temperature of above 350*C.
Claim 6
Dependent Claim
28 words
The process defined in claim 2 wherein said mass is roasted at a temperature between 400* and 600*C and is quenched without substantial reduction in temperature before quenching.
Claim 7
Dependent Claim
24 words
The process defined in claim 1 wherein said roasted product contains between 0.05 and 10 percent by weight of lead, zinc, copper and/or nickel.
Claim 8
Dependent Claim
30 words
The process defined in claim 4 wherein the lead zinc, copper and/or nickel are present in said roasted product in an amount ranging between 0.05 and 6 percent by weight.
Claim 9
Dependent Claim
21 words
The process defined in claim 4 wherein said roasted product contains 0.05 to 2 percent by weight lead and or zinc..
Claim 10
Dependent Claim
20 words
The process defined in claim 4 wherein said roasted product contains 0.05 to 2 percent by weight copper and/or nickel.
Claim 11
Dependent Claim
12 words
The process defined in claim 1 wherein said mass is flotation pyrite.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |