Emmen
Emmen
Celle
Aberdeen
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Tag

Well integrity

UBD – Live well drilling and completion

During managed pressure drilling (MPD) with a conventional drilling rig into a gas bearing formation severe losses were encountered. Surface pressures up to 180 Bar were recorded. The well was temporarily killed by pumping 250 mT of LCM material and a viscous seal pill and the drilling rig was demobilized. In total 5300 m³ of […]

Straddle recovery on a Live gas well

The well is a gas producer with a deviation of 48º that was completed with 5”completion in 1985. Well integrity problems forced the operator to shut-in the well and to plan a re-completion workover. Reservoir condition was such that killing the well would cause a significant production loss due to formation damage. HWO/Snubbing operation was […]

Safeguarding a blown out well

This was a gas storage well that supplied gas to the German capital, Berlin. A down-hole explosion occured during regular maintenance, which caused the well to blow out. This explosion caused major damage to the completion, casing and well-head. The primary objective was to safeguard the well by changing out the well-head and gaining access […]

Offshore Fishing

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The platform was located on an Oil Producing Field in the Mediterranean off the coast of Sicily. The wells were completed in the mid 1980´s to produce heavy 15.5 API oil. Over the course of thirty years the integrity of these wells had suffered, thus a workover campaign utilising HWO was initiated. The platform previously […]

Coil Tubing Recovery

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The platform was located on a Large Gas Producing Field in the Central North Sea. The Wells were beginning to water out and in an attempt to increase production the decision was made to run Coil Tubing Velocity Strings. During the first string installation a runaway occurred which resulted in the shear seals being closed […]

LIVE WELL CONNECTOR

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Four existing multi-lateral horizontal gas wells located in the Southern North Sea were initially completed barefoot but production eventually ceased due to blockage of the production conduit by reservoir solids (sand and rocks). To mitigate this problem, 2-7/8” pre-drilled liner pipe made up in lengths of up to 200m was to be deployed on wireline […]

Live well Coiled Tubing Recovery

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This gas injector/producer well was drilled in 2014 to a depth of 2635 mAH. After the well was completed and tested, coiled tubing was used to retrieve a 5.75” RPT standing valve installed in the packer tailpipe. Pressure differential over the valve was equalized using nitrogen. Coiled tubing was not able to free the valve. […]