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
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<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 />
Run <strong>in</strong> hole, set and test tub<strong>in</strong>g hanger crown plug.<br />
Pull out of hole.<br />
Rig down wire l<strong>in</strong>e.<br />
Test x-mas tree for abandonment<br />
16) Pull workover riser<br />
Disconnect tree cap runn<strong>in</strong>g <strong>to</strong>ol.<br />
Set back surface tree <strong>in</strong> moosehole.<br />
Pull workover riser and electric stab assembly.<br />
Lay down surface tree<br />
17) Pull BOP, lay down pipes<br />
Disconnect BOP.<br />
Move rig.<br />
Pull BOP and mar<strong>in</strong> riser.<br />
Lay down pipes<br />
18) Anchor handl<strong>in</strong>g<br />
Install x-mas tree debris cap. Install wellhead protective roof. Pull anchors.<br />
19) End of operations<br />
In chapter 6.2.3 the role of the BOP will be analysed <strong>in</strong> a HAZOP study. The entire workover<br />
process will not be analysed due <strong>to</strong> the lim<strong>it</strong>ation of time <strong>in</strong> this thesis.<br />
Diploma thesis, <strong>NTNU</strong> 2002<br />
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