Is it necessary to install a downhole safety valve in a subsea ... - NTNU
Is it necessary to install a downhole safety valve in a subsea ... - NTNU
Is it necessary to install a downhole safety valve in a subsea ... - NTNU
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Is</strong> <strong>it</strong> <strong>necessary</strong> <strong>to</strong> <strong><strong>in</strong>stall</strong> a <strong>downhole</strong> <strong>safety</strong> <strong>valve</strong> <strong>in</strong> a <strong>subsea</strong> oil/gas well?<br />
6.2.5 The HAZOP analysis<br />
The HAZOP study consists of four basic sequential steps, def<strong>in</strong><strong>it</strong>ion, preparation, exam<strong>in</strong>ation<br />
and documentation. Appendix D will describe the different steps <strong>in</strong> detail. The study of the<br />
BOP handl<strong>in</strong>g procedure is done <strong>to</strong> illustrate the use of a HAZOP analysis. A lot of the<br />
essential documentation and prepara<strong>to</strong>ry work has not been done. Focus has been on the<br />
exam<strong>in</strong>ation. This lim<strong>it</strong>ation is done due <strong>to</strong> the educational perspective of this thesis.<br />
Table 6-2 presents the result of the HAZOP analysis on a BOP handl<strong>in</strong>g procedure. The<br />
columns <strong>in</strong> the HAZOP sheet are based on ref. [2]. A column where exist<strong>in</strong>g safeguards are<br />
listed is left out due <strong>to</strong> the author’s lim<strong>it</strong>ed knowledge of the procedure.<br />
Diploma thesis, <strong>NTNU</strong> 2002<br />
47
Change language