1887
PDF

Abstract

A common cause of failure with surface-controlled, subsurface safety valves (SC-SSSV) is a defect in the down-hole<br>hydraulic line, which controls the valve from the surface. Such a failure generates production losses and requires the<br>intervention of a costly workover rig - usually not immediately available. In order to alleviate this type of situation, a<br>"fail-safe" safety system based on electromagnetic waves (EM) was developed in order to communicate with<br>Downhole Safety Valves (DHSV) without the need for a physical control-line. The surface emitter continuously sends a<br>signal (low frequency) to the SC-SSSV downhole. Both items are designed to be fail-safe. The normally-closed valve<br>remains open while receiving the signal and closes as soon as the signal is lost.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.151.iptc13757
2009-12-07
2021-01-25
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.151.iptc13757
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error