Schlumberger

MULTIBACK

Combination casing cleaning tool

The MULTIBACK combination casing cleaning tool comprises an integral magnet section to capture ferrous debris, scrapers to dislodge difficult-to-remove debris, and brushes to disturb the sheath and other fluid built upon the inner wall of the sassing or liner. The tool can be run in any combination of magnet, scraper, or brush.

The MULTIBACK tool is a combination of several other M-I SWACO tools, including

  • MAGNOSTAR high-capacity magnet
    The pacesetting MAGNOSTAR magnet was designed specifically for large-volume cleanup applications in high-torque strings.
  • RAZOR BACK casing cleaning tool
    Our standard RAZOR BACK tool represents a step-change improvement over the metal-bladed casing scrapers used previously.
  • BRISTLE BACK casing brush
    The BRISTLE BACK brush is designed to ensure that the multiple profiles of surface wellheads are clean prior to the completion.

By enabling operators to choose the combination of these tools to meet their specific applications or requirements for wellbore cleanup, the MULTIBACK tool reduces rig time. Operators get three tools with only a single connection required.

Additional tools can be added to the workstring to either facilitate more cleaning in a single run or to duplicate tools to ensure better coverage on a short trip.

Make up the tool how you need it

The MULTIBACK tool is a one-piece mandrel with brush or scraper lanterns. It features a bladed-magnet upper section and two areas capable of accepting the RAZOR BACK tool or BRISTLE BACK brush lanterns. The assembly can also be fitted with the new field-redressable brush lantern. The redressable design cuts rig inventory and costs because it means the tools does not have to be returned to US or UK service centers.

Gets the wellbore clean and ready for completions

The strong, flexible scraper lantern has a series of metal blades that provide the force to contact and scour the casing ID to remove mudcake and cement sheaths— including associated gunk and solid debris—and place them in suspension.

The strong, flexible brush lantern, with double crimped steel galvanized bristles to withstand erosive environments, provides scouring action ensures a clean pipe wall. The MULTIBACK tool scrapes and brushes 360° of the casing ID.

The lanterns and stabilizers are nonrotational, which minimizes casing wear while rotating the workstring. Self-centralizing lanterns distribute cleaning force equally for all hole inclinations.

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