Subsea tree workover control system
US8746346B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Oct 5, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0355
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electrical and hydraulic configuration on a subsea tree that facilitates the use of an ROV control system to operate the tree during well installations, interventions, and workovers. An SCM at the tree is in communication with a fixed junction plate that receives a production umbilical during normal operation. The ROV can be deployed to disconnect and park the production umbilical during well installations, interventions, and workovers to prevent accidental operation of the SCM or tree. The junction plate is configured to connect with the ROV and thereby establish communication with the hydraulic lines of the SCM. The ROV may carry an umbilical from a vessel to provide electrical and hydraulic service to the SCM during well operations. In addition, the ROV has facilities to repressurize spent control fluid to thereby allow reuse of the control fluid by the SCM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.