DamavanD® has been working in Drill-stem testing (DST) well testing
service by providing solutions that are safe and environmentally responsible.

The APR tools are operated by simply applying and releasing annulus pressure. If there is a need to close the tester valve in an emergency, bleeding the annulus pressure off will close the tool, permitting corrective measures to be taken.

DST test tools are full opening, other tools can be run on wireline or coiled tubing to perforate, test, sample, treat the formation, and retest all in a single trip.

Two major applications for APR test tools
are for wells drilled:

• In directional holes where pipe manipulation is difficult
• From floating vessels.