Disconnect assembly for cylindrical members
US9512683B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2012 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Oct 9, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An assembly for disconnecting portions of a downhole tubular string, such as a drill stem or drill string, and removing an upper portion of the tubular string from the lower stuck portion in a well, includes a connection between joints of two portions of the tubular string. The assembly includes two tubular members and an inner sleeve having two splines each with different angular pitches or teeth counts. The assembly may include a rotary shouldered threaded connection, wherein the two tubular portions are disconnectable at the rotary shouldered threaded connection in the assembly. The assembly may include a sleeve lock, a selective no-go for landing in a profile, and a selectively deployable unlocking and unblocking tool for activating the assembly. The assembly may include connectable cylindrical members other than downhole tubulars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.