Use of calcium sulfonate based threaded compounds in drilling operations and other severe industrial applications
The present invention discloses the use of calcium sulfonate based greases compounds for use in application where the compounds are continuously, periodically or intermittently exposed to fluids that tend to contamination, erode, ablate or otherwise remove or interfere with the compounds ability to protect contact surfaces such as those present in threaded connections, and, especially in threaded connections associated with oilfield applications. The present invention also discloses methods for making and using such greases and compounds in application where the compounds are continuously, periodically or intermittently exposed to fluids that tend to contamination, erode, ablate or otherwise remove or interfere with the compounds ability to protect contact surfaces.
1. A method for using a calcium sulfonate complex grease based composition to protect contacting surfaces comprising the steps of:
applying to the contacting surfaces exposed on a continuous, periodic and/or intermittent basis to an active fluid, prior to engaging the surfaces, an amount of a thread composition comprising a calcium sulfonate complex grease and a thread protecting additive system; and
engaging the contacting surfaces, and
exposing the contacting surfaces to the active fluid having a pH greater than or equal to 7 on a continuous, periodic and/or intermittent basis,
where the amount of the composition is sufficient to protect the contacting surfaces from direct metal-to-metal contact during the exposing step.
2. The method of claim 1 , wherein the grease comprises from about 20 wt. % to about 60 wt. % of the calcium sulfonate complex grease and from about 10 wt. % to about 60 wt. % of the thread protecting additive system.
3. The method of claim 1 , wherein the composition further includes an anti-wear additive system and/or an anti-degradant system and the thread protecting additive system compnses one or more boundary lubricants and/or one or more contacting surface protecting agent.
4. The method of claim 3 , wherein the composition comprises from about 40% to about 80% by weight of the calcium sulfonate complex grease, from about 5% to about 60% by weight of one or more boundary lubricants and from about 0.1% to about 10% by weight of one or more contacting surface protecting agent.
5. The method of claim 3 , wherein the composition comprises from about 40% to about 80% by weight of the calcium sulfonate complex grease, from about 5% to about 60% by weight of one or more boundary lubricants and from about 0.1% to about 10% by weight of one or more contacting surface protecting agent and further comprises up to about 12% by weight of an anti-wear additive system and up to about 5% by weight of an anti-degradant system.
6. The method of claim 4 , wherein the composition comprises from about 50% to about 80% by weight of the calcium sulfonate complex grease, from about 10% to about 30% by weight of one or more boundaiy lubricants, and from about 0.2% to about 5% by weight of contacting surface protecting agent, up to about 10% by weight an anti-wear additive system and up to about 4% by weight of an anti-degradant system.
7. The method of claim 1 , wherein the calcium sulfonate complex grease comprises calcium sulfonate dispersed in a base oil.
8. The method of claim 7 , wherein calcium sulfonate complex grease comprises from about 5 to about 40 wt. % calcium sulfonate and from about 95 to about 60 wt. % base oil based on the total weight of the grease.
9. The method of claim 7 , wherein calcium sulfonate complex grease comprises from about 10 to about 30 wt. % calcium sulfonate and from about 90 to about 70 wt. % base oil based on the total weight of the grease.
10. The method of claim 7 , wherein the base oil is selected from the group consisting of synthetic fluids, petroleum fluids, natural fluids, and mixtures or combinations thereof and has a viscosity ranging from about 5 to about 600 centistokes at 40° C. centigrade.
11. The method of claims 1 , wherein the composition is an anti-seize thread compound.
12. A method for using a calcium sulfonate complex greased based composition to protect threaded connections comprising the steps of:
applying to threads of a threaded connection to be exposed on a continuous, periodic and/or intermittent basis to an active fluid, prior to making up the connection, an amount of a thread composition comprising a calcium sulfonate complex grease and an additive system; and
making-up the threaded connection, and
exposing the threaded connection to the active fluid having a pH greater than or equal to 7 on a continuous, periodic and/or intermittent basis,
where the amount of the composition is sufficient to protect the connection from direct metal-to-metal contact during the exposing step.
13. The method of claim 12 , wherein the grease comprises from about 40 wt. % to about 95 wt. % of the calcium sulfonate complex grease and from about 60 wt. % to about 5 wt. % of the additive system.
14. The method of claim 12 , wherein the additive system comprises one or more boundary lubricants, one or more contacting surface protecting agents, one or more an anti-wear additives and/or one or more an anti-degradants.
15. The method of claim 14 , wherein the composition comprises from about 40% to about 80% by weight of the calcium sulfonate complex grease, from about 5% to about 60% by weight of one or more boundary lubricants and from about 0.1% to about 10% by weight of one or more contacting surface protecting agent.
16. The method of claim 14 , wherein the composition comprises from about 40% to about 80% by weight of the calcium sulfonate complex grease, from about 5% to about 60% by weight of one or more boundary lubricants and from about 0.1% to about 10% by weight of one or more contacting surface protecting agent and further comprises up to about 12% by weight of an anti-wear additive system and up to about 5% by weight of an anti-degradant system.
17. The method of claim 12 , wherein the calcium sulfonate complex grease compnses from about 5 to about 40 wt. % calcium sulfonate and from about 95 to about 60 wt. % base oil based on the total weight of the grease.
18. The method of claim 1 wherein calcium sulfonate complex grease comprises from about 10 to about 30 wt. % calcium sulfonate and from about 90 to about 70 wt. % base oil based on the total weight of the grease.
19. The method of claim 9 , wherein the base oil is selected from the group consisting of synthetic fluids, petroleum fluids, natural fluids, and mixtures or combinations thereof and has a viscosity ranging from about 5 to about 600 centistokes at 40° C. centigrade.
20. The method of claims 12 , wherein the composition is an anti-seize thread compound.
21. The method of claims 1 , wherein the active fluid has a pH greater than or equal to 8.
22. The method of claims 1 , wherein active fluid has a pH greater than or equal to 9.
23. The method of claims 12 , wherein the active fluid has a pH greater than or equal to 8.
24. The method of claims 12 , wherein active fluid has a pH greater than or equal to 9.
25. The method of claims 1 , wherein the composition further comprises:
a finely divided fibrous material.
26. The method of claims 1 , wherein the composition further comprises:
a metal powder and/or flake.
27. The method of claims 12 , wherein the composition further comprises:
a finely divided fibrous material.
28. The method of claims 12 , wherein the composition further comprises:
a metal powder and/or flake.