High torque constant velocity joint for downhole drilling power transmission
US10975623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2016 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Feb 28, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/208
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A constant velocity joint for downhole power transmission has a first insert mounted in a radially extending drive shaft arm. The first insert engages a second insert mounted along a slot formed in a tubular housing disposed to receive the arm. The material for the two inserts may be different, having different galling properties. An insert may be shaped to have at least a flat surface, a cylindrical surface intersecting the flat surface, and a conical surface intersecting the cylindrical surface. The inserts may extend beyond the cavities in which they are mounted. Opposing cavity walls adjacent the cavity opening may be angled away from one another to permit the insert to flex under a load. The back wall of a cavity and back surface of an insert may be arcuate to permit rotational movement of the insert under a load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.