Wellbore fluids for use downhole

Patent metadata

Field	Value
Publication number	US-10253234-B2
Application number	US-201615223942-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Jul 29, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A wellbore fluid may include a base fluid, and a ground weight material comprising barite and quartz and having a d50 between about 4 and 8 microns and a d90 between about 15-25 microns. The ground weight material of the wellbore fluid may have a specific gravity of less than or equal to about 4.2.

First claim

What is claimed:

1. A wellbore fluid comprising:
a base fluid; and
a barite-based ground weight material ground from barite ore such that the barite-based ground weight material comprises barite and quartz and has a d 50 between about 4-8 microns and a d 90 between about 15-25 microns, wherein the quartz has a larger average particle size than the barite and the barite-based ground weight material has a weight percent of quartz of about 4-12 percent.

2. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a specific gravity of less than or equal to about 4.2.

3. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a weight percent of quartz ranging between about 5-7 percent.

4. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 90 between about 18-22 microns.

5. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 50 between about 4-8 microns.

6. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 75 between about 12-14 microns.

7. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 85 between about 15-17 microns.

8. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 95 between about 24-34 microns.

9. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 98 between about 32-60 microns.

10. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 98 between about 32-60 microns.

11. The wellbore fluid of claim 1 , wherein the barite-based ground weight material has a d 99.5 between about 48-120 microns.

12. The wellbore fluid of claim 1 , wherein the base fluid is one selected from a water-based fluid, an invert emulsion and a direct emulsion.

13. The wellbore fluid of claim 1 , wherein the mixed wellbore fluid has a viscosity between about 12,000 and 20,000 cP at 0.17 s −1 and between about 1,500 and 2,500 cP at 1.7 s −1 .

14. The wellbore fluid of claim 1 , wherein the mixed wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm.

15. A wellbore fluid comprising:
a base fluid; and
a barite-based weight material ground from barite ore and comprising quartz,
wherein the weight material has a weight percent of quartz ranging between 4-12 percent,
wherein the wellbore fluid has a viscosity of at least 20 lbs/100 ft 2 between 30 and 100 rpm and a viscosity between about 12,000 and 20,000 cP at 0.17 s −1 and between about 1,500 and 2,500 cP at 1.7 s −1 , and
further wherein a particle size distribution of the barite-based weight material has a larger size range of particles comprising quartz particles.

16. The wellbore fluid of claim 15 , wherein the barite-based weight material is selected from the group consisting of barium sulphate (barite), calcium carbonate, dolomite, ilmenite, hematite, olivine, siderite, and strontium sulphate.

17. The wellbore fluid of claim 15 , wherein the barite-based weight material has a specific gravity of less than or equal to about 4.2.

18. The wellbore fluid of claim 15 , wherein the barite-based weight material has a d 50 between about 4-8 microns and a d 90 between about 15-25 microns.

Assignees

• Mi Llc

Inventors

• Bouguetta Chemsseddine
• Matlock Roger Wayne
• Conn Henry Lee
• Bailey Robert
• Friedheim James

Classifications

• C09K8/032 Primary

  Inorganic additives · CPC title

• C09K8/16

  characterised by the inorganic compounds other than clay · CPC title

• C09K8/32

  Non-aqueous well-drilling compositions, e.g. oil-based · CPC title