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 />
Figure 6-1 A conventional <strong>subsea</strong> blowout preventer stack<br />
6.1.4 Well <strong>in</strong>tervention example<br />
This section describes a workover preformed on a well <strong>in</strong> the North Sea [35]. The ma<strong>in</strong><br />
objective of the <strong>in</strong>tervention is <strong>to</strong> get the DHSV function<strong>in</strong>g aga<strong>in</strong> by replac<strong>in</strong>g the whole<br />
completion. This <strong>in</strong>tervention will <strong>in</strong>clude pull<strong>in</strong>g of the production tub<strong>in</strong>g.<br />
The workover also <strong>in</strong>cluded a replacement of the flow control module, pull<strong>in</strong>g and mill<strong>in</strong>g of a<br />
production packer <strong>to</strong> <strong>in</strong>crease the production potential. These events are neglected from this<br />
workover example.<br />
The description is given by the use of short sentences. A full detailed description is <strong>to</strong>o<br />
extensive for the work of this thesis.<br />
Diploma thesis, <strong>NTNU</strong> 2002<br />
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