Piston and cylinder assembly of a downhole tool, downhole tool with a piston and cylinder assembly, and method of assembling the piston and cylinder
US12345157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2022 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | May 24, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A piston and cylinder assembly of a downhole tool including a rotary steerable tool. The piston has an outer wall in direct sliding contact with a wall of the cylinder. The cylinder has a retainer for the piston, the retainer has a retaining part and the piston has a retained part, such that the retaining part and the retained part cooperate to retain the piston in the cylinder. The invention separates the function of retaining the piston from sealing the piston to cylinder interface. The invention also relates to a method of assembling the piston and cylinder including rotating the piston relative to the cylinder so that at least a portion of the retained part becomes aligned with at least a portion of the retaining part, and locking the piston against subsequent rotation relative to the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.