Shape memory alloy shaft alignment coupler for downhole tools
US11619104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2020 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Apr 9, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus comprising a housing having a housing throughbore extending therethrough along a central axis; a motor drive shaft disposed in the housing throughbore; a component drive shaft disposed in the housing throughbore; and an alignment coupler mechanically coupling the motor drive shaft with the component drive shaft. The alignment coupler comprises: an alignment coupler body having an alignment coupler body throughbore extending therethrough; a spherical bolt comprising a spherical first end and an elongated section extending from the spherical first end to a second end; a thermally expandable material (TEM) section; a spring section comprising one or more springs; and one or more spherical spacers. The alignment coupler enables alignment of the motor drive shaft and the component drive shaft within the apparatus during assembly of the apparatus, and heating of the TEM provides rigidity to the assembled apparatus prior to use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.