Apparatus and method for well tubular flotation
US10907439B2 · kind B2 · utility
0Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2019 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flotation device for a wellbore tubular has a flotation disk having a tapered exterior profile. A maximum external diameter of the flotation disk is such to enable free longitudinal movement within the wellbore tubular. A plurality of locking segments each has a tapered interior profile cooperatively engageable with the tapered exterior profile. Each locking segment has gripping elements on an exterior surface thereof to engage an inner wall of the wellbore tubular. The tapered exterior profile and the tapered interior profile cooperate to expand a diameter of the locking segments as profile engagement increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.