Multilayer solid lubricant architecture for use in drilling tool applications
| DWPI Title: Reciprocating hammer drill for use in e.g. mining industry, has feed tube comprising feed tube exterior surface opposed to interior surface of piston, where intermediate layer is selected from group consisting of titanium carbonitride |
| 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: Reciprocating hammer drill e.g. down-the-hole hammer drill used in mining, construction, and water well drilling industries and used in hard rock drilling. |
| 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 reciprocating hammer drill has a casing (40) and a feed tube is positioned within the casing. A feed tube is provided with a feed tube exterior surface is opposed to the interior surface of the piston. The piston exterior surface or the feed tube exterior surface comprises a substrate (42) with an interface (44) surface. An intermediate layer (46) is overlying and in contact with the substrate interface surface. A solid lubricant coating layer is overlying and in contact with the intermediate layer. The intermediate layer is selected from the group including a metallic layer selected from the group consisting of silicon and titanium, a monolithic ceramic layer, and a nanolaminate layer selected from the group consisting of a titanium carbonitride and aluminum titanium nitride. |
| Filed: 9/20/2018 |
| Application Number: US16136546A |
| Tech ID: SD 12092.0 |
| 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. |