Casing string torque transfer and suspension system and method for mandrel casing hangers
US10648243B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2017 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Jul 28, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0415
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A casing string torque transfer and suspension system and method for mandrel casing hangers. A running tool for a mandrel casing hanger suspending a casing string includes a pair of rotary drive rings secured around the running tool, a torque transfer ring of the pair of drive rings including a series of sloping teeth that removably couple to the mandrel casing hanger, the drive rings transferring torque to the casing string to rotate the casing string in a right-handed direction during one of running of the casing string, cementing of the casing string or a combination thereof, and the pair of rotary drive rings transferring axial loads to the casing string when the running tool is threaded to the mandrel casing hanger. Rotation of the rotary drive rings in a left-handed direction retracts the rotary drive rings as the running tool separates from the mandrel casing hanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.