System for subsea diverless metrology and hard-pipe connection of pipelines
US6700835B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Device for subsea metrology of distance and relative orientation of a first termination (10) with a local reference system (xr, yr, zr) and which by means of a jumper spool piece (5) is going to be connected to a separate second termination (20) having a local reference system (xB, yB, zB), characterized by a base metrology unit (2) arranged for being carried by an ROV (4), and arranged for aligned arrangement with the second or the first termination's (20, 10) reference system, and comprising the following features: a wire (3) with an extractable first end (31) being arranged for being attached to a receptacle device (7, 7′) arranged on the termination (10, 20) for receiving the wire's (3) first end (31) or a metrology unit and with a wire tensioner device (32) arranged for tensioning the wire (3) between the base metrology unit (2) and the receptacle device (7, 7′); a wire length sensor (34) arranged for measuring the length (DrB) of the extended taut wire (3); a relative azimuth sensing device (92) arranged to measure [and store] the relative azimuth (&thgr;B, &thgr;r) value of the taut wire (3) with respect to the base metrology unit's (2) mainly horizontal axes (xB…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.