Claims
- 1. A slurry composition of matter consisting essentially of fresh water, about 15 to 40 ppb of bentonite, about 4 to 10 ppb of ferrochrome lignosulfonate, about 3/4 to 3 ppb of magnesium oxide, and a sufficient quantity of basic material to result in a pH of the slurry of about 9.5 to 12.
- 2. A slurry composition in accordance with claim 1 wherein said composition contains 30 to 35 ppb of bentonite, 4 to 6 ppb of ferrochrome lignosulfonate, and 3/4 to 1 ppb of magnesium oxide.
- 3. A slurry composition in accordance with claim 1 wherein said composition contains about 4 ppb of ferrochrome lignosulfonate and about 3/4 ppb of magnesium oxide.
- 4. A slurry composition in accordance with claim 1 additionally containing about 1 to 3 ppb of asbestos fibers.
- 5. A slurry composition in accordance with claim 1 wherein said basic material is sodium hydroxide.
- 6. A process to produce a drilling fluid comprising
- (a) mixing 15 to 40 ppb of bentonite, 4 to 10 ppb of ferrochrome lignosulfonate, 3/4 to 3 ppb of magnesium oxide, and a sufficient quantity of basic substance to fresh water to result in a hydrated bentonite slurry composition having a pH of about 9.5 to 12, and
- (b) mixing the resulting hydrated bentonite slurry with a salty drilling liquid containing at least about 8 weight percent sodium chloride in a volume ratio of slurry to salty drilling fluid of about 1:1.
- 7. A process in accordance with claim 6 comprising mixing 1/2 to 2 pounds of sodium hydroxide as said basic substance.
- 8. A process to produce a drilling fluid comprising
- (a) mixing 15 to 40 ppb of bentonite, about 4 ppb of ferrochrome lignosulfonate, about 3/4 ppb of magnesium oxide, and a sufficient quantity of basic substance to fresh water to result in a hydrated bentonite slurry composition having a pH of about 9.5 to 12, and
- (b) mixing the resulting hydrated bentonite slurry with a salty drilling liquid containing at least about 8 weight percent sodium chloride in a volume ratio of slurry to salty drilling fluid within the range of about 1:1 to 1:4.
- 9. A drilling fluid produced by the process of claim 6.
- 10. A drilling fluid produced by the process of claim 7.
- 11. A drilling fluid produced by the process of claim 8.
- 12. In a process for drilling a well with well drilling tools wherein an aqueous drilling fluid is circulated in the well while drilling, the steps comprising
- circulating in said well as said drilling fluid a composition produced by the process of mixing 15 to 40 ppb of bentonite, 4 to 10 ppb of ferrochrome lignosulfonate, 3/4 to 3 ppb of magnesium oxide, and a sufficient quantity of basic substance to fresh water to result in a hydrated bentonite slurry composition having a pH of about 9.5 to 12 and then mixing the resulting hydrated bentonite slurry with a salty drilling fluid containing at least about 8 weight percent of sodium chloride in a volume ratio of slurry to salty drilling fluid of about 1:1.
- 13. A process in accordance with claim 12 wherein said hydrated bentonite slurry composition comprises as said basic material 1/2 to 2 ppb of sodium hydroxide.
- 14. In a process for drilling a well with well drilling tools wherein an aqueous drilling fluid is circulated in the well while drilling, the steps comprising,
- circulating in said well as said drilling fluid a composition produced by the process of mixing 15 to 40 ppb of bentonite, about 4 ppb of ferrochrome lignosulfonate, about 3/4 ppb of magnesium oxide, and a sufficient quantity of basic substance to fresh water to result in a hydrated bentonite slurry composition having a pH of about 9.5 to 12 and then mixing the resulting hydrated bentonite slurry with a salty drilling fluid containing at least about 8 weight percent of sodium chloride in a volume ratio of up to 6 volumes of salty drilling fluid per volume of slurry.
Parent Case Info
This is a continuation-in-part application of our copending patent application, Ser. No. 744,057, filed Nov. 22, 1976, now abandoned, which was a continuation-in-part of application Ser. No. 621,098, filed Oct. 9, 1975, now abandoned.
US Referenced Citations (8)
Non-Patent Literature Citations (1)
Entry |
Mondshine et al., "A New Salt Mud from Q-Broxin/Aquagel", article in Baroid News Bulletin, vol. 15, No. 3, pp. 10-17, (Pub. by Baroid Division of National Lead Co., Houston, Texas). |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
744057 |
Nov 1976 |
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Parent |
621098 |
Oct 1975 |
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