Hydraulic tools including removable coatings, drilling systems, and methods of making and using hydraulic tools
US9896885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Mar 28, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49242
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic tool includes a stator, a rotor, and a removable coating. At least one of the stator and the rotor comprises a resilient material. The removable coating has a thickness selected to compensate for expected swelling of the resilient material or an expected contraction of a clearance between the rotor and the stator based on thermal expansion. The removable coating is disposed on a surface of at least one of the rotor and the stator, and the removable coating is formulated to be removed during operation of the hydraulic tool. A method of operating a hydraulic tool includes passing a fluid through the hydraulic tool during rotation of the rotor within the stator and removing at least a portion of the removable coating responsive to rotation of the rotor within the stator as a volume of the resilient material increases responsive to contact with the fluid passing through the hydraulic fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.