High-Efficiency Scale Removal in North Sea Well | Schlumberger
Tech Report
Location
North Sea, Norway, Europe, Offshore
Details
Lithology
Chalk

Well section
11,467 ft [3,495 m]

Scale removed
7.5 metric tons

Background
An operator needed to reverse declining production in an offshore well that suffered from heavy bariumsulfate (BaSO4) scaling. The Jet Blaster engineered high-pressure jetting service and Neyrfor TTT thru-tubing turbodrill were used in combination to efficiently clean out scale. A multicycle circulating valve (MCCV) was used to preserve the life of downhole tools and to enable higher pump rates for enhanced transport to surface. More than 7.5 metric tons of BaSO4 was removed from an 11,467-ft section of well and recovered at the surface. The scale was successfully ground into fine particles, which helped ease flow to surface.
Products Used

High-Efficiency Scale Removal in North Sea Well

More than 7 metric tons of scale removed using Jet Blaster service and Neyrfor TTT thru-tubing turbodrill

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The Jet Blaster service uses carbide nozzles with swirl eliminators to increase hydraulic efficiency, and the drift ring controls ROP for positive, one-pass cleaning.
Products Used

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