Method for pulling a crown plug
US8869899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jun 23, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided is a method and apparatus for pulling a crown plug comprising: (a) providing a subsea lubricator having a longitudinal through bore and a jack attached to the subsea lubricator, the jack having a landing area; (b) providing a jacking string which includes a landing sub and a crown plug connector, the sub having a landing surface; (c) without the jacking string in step “b”, lowering the subsea lubricator of step “a”, to the horizontal christmas tree and attaching the lubricator to the christmas tree; (d) lowering the jacking string to the lubricator; (e) jacking up the jack such that the landing area of the jack contacts the landing surface of the landing sub; and (f) while the lubricator remains attached to the christmas tree, raising the jacking string and crown plug through and out of the lubricator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.