Multilayer solid lubricant architecture for use in drilling tool applications
| DWPI Title: Coating architecture for use in reciprocating hammer drill, has solid lubricant layer that overlies and in contact with intermediate layer, and has sufficient thickness to completely cover nanolaminate coating |
| Abstract: A coating architecture is disclosed that includes a substrate having a surface finish Ra of 0.3μ or finer, an intermediate layer overlying and in contact with the substrate; and a solid lubricant layer overlying and in contact with the intermediate layer. The test results of applying the coating architecture to a reciprocating hammer drill utilizing the coating is also disclosed. |
| Use: Coating architecture for use in a reciprocating hammer drill i.e. down-the-hole (DTH) hammer drill, used in mining, construction and water well drilling industries. |
| Advantage: The drill extends the life of the reciprocating hammer drill when used in high-temperature oxidizing environments so as to survive high temperatures of use without adversely affecting environments. The diamond-like carbon (DLC) coating layer is applied in sufficient thickness to completely cover the nanolaminate layer, but not so thick as to lose its characteristics as an adherent, solid coating layer, and specifically as a solid lubricant layer, due to excessive residual stresses. |
| Novelty: The architecture comprises a substrate that has a surface finish Ra of 3μ or less. An intermediate coating overlying and in contact with the substrate. A solid lubricant layer overlying, and contacting with the intermediate layer, where the solid layer has sufficient thickness to completely cover the nanolaminate coating. The intermediate layer is a nano-laminate, monolithic ceramic or metallic layer. The solid layer also has a diamond-like carbon (DLC) coating layer, which further contains an amorphous layer that has short range ordered phases of diamond- like structures. |
| Filed: 9/27/2021 |
| Application Number: US17485749A |
| Tech ID: SD 12092.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |