Mechanical lifting failures - OGP
Mechanical lifting failures - OGP
Mechanical lifting failures - OGP
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RADD – <strong>Mechanical</strong> <strong>lifting</strong> <strong>failures</strong><br />
Table 4.1 Observed Frequencies of Lifting Operations on Mobile<br />
Installations<br />
Lifting Device<br />
Lifts per Year<br />
Main Crane 24,480<br />
Drilling Derrick 28,670<br />
Other Lifting Device 3,650<br />
Total 56,800<br />
Table 4.2 Calculated Frequencies of Lifts using Main Crane on Fixed<br />
Installations (per year)<br />
Type of installation<br />
Lifts to / from<br />
Vessels<br />
Internal Lifts<br />
Fixed (no drilling) 5520 8,674<br />
Fixed (drilling for 6 months /<br />
year)<br />
8400 10,937<br />
Wellhead platform 552 867<br />
The UK HSE has also published accident data for more recent period up to and<br />
including 2004/2005 [5, 6. 7] These data have not been subjected to the same detailed<br />
statistical analysis as the data presented in this report and for this reason the more<br />
recent experience is not included here. However a review of the data over the period<br />
1980 to 2005 shows that although there is considerable variation from year to year, the<br />
average frequency of dropped objects per installation-year remains approximately<br />
constant. This is consistent with the observation that the technology and <strong>lifting</strong><br />
procedures used on offshore installations have not changed to any great extent over the<br />
period the data were collected.<br />
5.0 References<br />
1. DNV, 2006. WOAD, Worldwide Offshore Accident Databank, version 5.0.1.<br />
2. DNV, 1999. Accident statistics for mobile offshore units on the UK continental shelf in<br />
1980-98, HSE Offshore Technology Report OTO 2000/091 / DNV Report No. 99-2490.<br />
3. DNV, 2002. Accident statistics for fixed offshore units on the UK Continental Shelf 1991-<br />
1999, HSE Offshore Technology Report OTO 2002/012.<br />
4. DNV, 2002. Risk Assessment of Pipeline Protection, Recommended Practice No. DNV-<br />
RP-F107 (amended).<br />
5. HSE, 2006. Offshore Injury, Ill Health and Incident Statistics 2004/2005 (provisional data),<br />
HID Statistical Report HSR 2005 001.<br />
6. HSE, 2005. Accident statistics for Floating Offshore Units on the UK Continental Shelf<br />
1980-2003, Research Report 353, prepared by Det Norske Veritas for the Health and<br />
Safety Executive.<br />
7. HSE, 2005. Accident statistics for Fixed Offshore Units on the UK Continental Shelf 1980 –<br />
2003, Research Report 349, prepared by Det Norske Veritas for the Health and Safety<br />
Executive.<br />
8<br />
©<strong>OGP</strong>
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