Independently retrievable subsea tree and tubing hanger system
US6470968B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Nov 24, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/043
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsea wellhead completion system and method for independently retrieving or deploying a subsea completion with a wellhead housing adapted to be supported on a seabed, a tree atop the wellhead housing with a fine alignment key for aligning the tree with the wellhead housing, a tubing hanger atop the tree with a production and an annular tubing string extending downwardly, numerous ports on the tree, engagable gates to open and close one or more of the ports, a deployable running tool that can manipulate the gates and wherein the tubing hanger is composed of the slidably ignitable gates connected to a way for retracting or extending outer seals of the tubing hanger and provide a blocking position against an inner seal and an unblocking position for fluid communication of the bores with each ports of the tubing hanger tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.