Upper marine riser package
US4712620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jan 31, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An upper marine riser package (10/10A) comprising a diverter (D) for diverting uncontrolled gas and return drilling mud therethrough, a flexible joint FJ for allowing tilting motion between a vessel and a riser string (RS), a self-tensioning slip joint (SJ) and riser rotation bearing joint (RB) suspended below said vessel (V) to compensate for vertical motion between a subsea well (W) and a floating vessel (V). The upper marine riser package (10/10A) is sized to be run through a confined opening such as a riser handling spider (HS) and rotary table (RT) and to be suspended and operated below the deck of the vessel (V). The upper marine riser package can be used to eliminate the conventional riser tensioners normally above the platform and can be used in combination with such conventional riser tensioners normally above the platform for deeper and deeper drilling opertion. Two versions of the upper marine riser package (10/10A) ar disclosed, one (10) with an elastomeric bearing type flexible joint (FJ) and the other (10A) with a ball joint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.