Epoxidized alpha olefin based lubricant for water-based drilling fluids

Patent metadata

Field	Value
Publication number	US-11214724-B1
Application number	US-202016943434-A
Country	US
Kind code	B1
Filing date	Jul 30, 2020
Priority date	Jul 30, 2020
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

Drilling fluid compositions and methods for using drilling fluid compositions are provided with enhanced lubricating properties that include an aqueous-based fluid, one or more drilling fluid additives, and a lubricating additive. The lubricating additive may be an epoxidized α-olefin and the drilling fluid may include the lubricating additive in an amount ranging from about 1 ppb to about 20 ppb. Methods for using the drilling fluid compositions may further include mixing an aqueous base fluid with one or more drilling fluid additives and a lubricating additive, wherein the lubricating additive includes epoxidized α-olefin and the drilling fluid may include the lubricating additive in an amount ranging from about 0.5 ppb to about 20 ppb, and introducing the drilling fluid to a subterranean formation.

First claim

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1. A drilling fluid comprising:
an aqueous-based fluid; and
a lubricating additive, wherein the lubricating additive is an epoxidized α-olefin that has the general structure of Formula (I):

where x is in a range of from 1 to 40, and
wherein drilling fluid comprises the lubricating additive in an amount ranging from about 1 ppb (pounds per barrel) to about 20 ppb.

2. The drilling fluid composition of claim 1 , wherein the aqueous-based fluid of the drilling fluid comprises greater than 70 wt % (weight percent) of the drilling fluid.

3. The drilling fluid composition of claim 2 where the aqueous-based fluid is a brine.

4. The drilling fluid composition of claim 1 further comprising an additive selected from the group consisting of fluid loss control agents, lost circulation control agents, supplemental weighting agents, fluid loss additives, viscosity adjusters, an alkali reserve, pH adjuster, and a combination thereof.

5. The drilling fluid composition of claim 4 , wherein drilling fluid composition comprises the additive in an amount ranging from 1 to 30 wt %.

6. The drilling fluid composition of claim 1 further comprising a weighting agent.

7. The drilling fluid of claim 1 where a coefficient of friction of the drilling fluid is less than 50% of the coefficient of friction of a similar drilling fluid without the lubricating additive.

8. A method for making a drilling fluid comprising:
mixing an aqueous base fluid with a lubricating additive, wherein the lubricating additive is an epoxidized α-olefin that has the general structure of Formula (I):

where x is in a range of from 1 to 40, and
where the drilling fluid comprises the lubricating additive in an amount ranging from about 1 ppb (pounds per barrel) to about 20 ppb.

9. The method of claim 8 , wherein the aqueous-based fluid of the drilling fluid comprises greater than 70 wt % (weight percent) of the drilling fluid.

10. The method of claim 8 , wherein the aqueous-based fluid is a brine.

11. A method for using a drilling fluid comprising:
introducing a drilling fluid into a wellbore, the drilling fluid comprising:
an aqueous base fluid with a lubricating additive, wherein the lubricating additive is an epoxidized α-olefin that has the general structure of Formula (I):

where x is in a range of from 1 to 40, and

where the drilling fluid comprises the lubricating additive in an amount ranging from about 1 ppb (pounds per barrel) to about 20 ppb.

12. The method of claim 11 where the drilling fluid is introduced into the wellbore through a drill string.

13. The method of claim 11 , where a coefficient of friction of the drilling fluid is less than 50% of the coefficient of friction of a similar drilling fluid without the lubricating additive.

14. The method of claim 11 , where the aqueous-based fluid is a brine.

15. The method of claim 11 further comprising an additive selected from the group consisting of fluid loss control agents, lost circulation control agents, supplemental weighting agents, fluid loss additives, viscosity adjusters, an alkali reserve, pH adjuster, and a combination thereof.

16. The method of claim 15 , wherein drilling fluid comprises the additive in an amount ranging from 1 to 30 wt %.

17. The method of claim 15 , wherein the drilling fluid comprises one or more salts in an amount that ranges from 1 to 300 ppb.

Assignees

• Saudi Arabian Oil Co

Inventors

• Wagle Vikrant
• Ramasamy Jothibasu
• Al-Yami Abdullah S
• Alanqari Khawlah A

Classifications

• C09K2208/34

  Lubricant additives · CPC title

• C09K8/06 Primary

  Clay-free compositions (containing inorganic compounds only C09K8/05) · CPC title

• C09K2208/28

  Friction or drag reducing additives · CPC title

• E21B21/003

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title

• E21B21/062

  by mixing components · CPC title