Alignment apparatus for a sliding sleeve subterranean tool
US10125575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2014 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Aug 21, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An alignment device for a sliding sleeve in a housing in a tubular string features a patterned alignment ring that remains stationary. The sliding sleeve in one of its end positions has a mating profile such that profile misalignment results in profile alignment as the sliding sleeve is axially advanced toward the alignment ring. In a choke application the fully closed position of the choke brings the profiles together to induce relative rotation into an aligned configuration of the ports on the sliding sleeve with the ports on the surrounding housing. Misalignment can occur when tools are run through the sliding sleeve for other downhole operations and the design parameters for the choke prevent the use of alignment lugs in axial slots. The mating profiles do not reduce the drift dimension through the sliding sleeve and allow higher housing pressure ratings for deep set applications with large operating differential pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.