Horizontal tree block for subsea wellhead and completion method
US6076605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0353
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsea wellhead assembly has a tubular housing having a sidewall, an axial bore, and a housing lateral passage extending from the bore through the sidewall. A blocking sleeve fits around the housing to block the housing lateral passage while drilling through the housing. A tubing hanger is secured to a string of tubing and landed in the housing. The tubing hanger has a vertical passage which communicates with the tubing and a tubing lateral passage which extends from the vertical passage and registers with the housing lateral passage. A lower annulus port is in the sidewall of the housing below the lower seal and leads to a tubing annulus. An upper annulus port is in the sidewall of the housing above the upper seal and leads to the bore of the housing. A tree block having a central opening for receiving the housing is lowered over the housing after removal of the blocking sleeve. The tree block has a tree production passage which registers with the housing lateral passage for directing flow of production fluid from the well. A production valve is mounted to the tree block for opening and closing the tree production passage. A bypass passage in the tree block connects the upper an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.