Screw-driven wellhead isolation tool
US6666266B2 · kind B2 · utility
49Cited by
44References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | May 3, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead isolation tool comprises a threaded drive rod coaxially aligned with a tubular mandrel having a smooth outer surface. A motor displaces the threaded drive rod vertically without rotating the drive rod to move the tubular mandrel through a wellhead into a tubular element in a well. The lower end of the tubular mandrel will sealingly engage the tubular element in the well so that treating fluids or other substances such as, but not limited to, chemicals and erosive flows, can be displaced therethrough at high pressures into the well to fracture or otherwise treat the well without damaging the wellhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.