Pre-made up side entry sub apparatus and method
US7841413B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2009 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Apr 16, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For use with a top drive power unit supported for connection with a well string in a well bore to selectively impart longitudinal and/or rotational movement to the well string, a feeder for supplying a pumpable substance such as cement and the like from an external supply source to the interior of the well string in the well bore without first discharging it through the top drive power unit including a body having flow passages for communicating the pumpable substance from an external source to discharge through the sub and into the interior of the well string below the top drive power unit, and a brace which reduces and/or eliminates the transfer of forces from the chicksan line to the valve and inlet of the side entry sub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.