Cased Hole Multi Stage Stimulation
60-602 MK11S Straddle Packer
Product Overview

The MK-11S is a high performance mechanical packer type straddle system intended for use on coiled tubing. The system allows the selective treatment of multiple zones in a single trip and is ideally suited for horizontal, cased liner, multi-stage stimulation completions either with perforated liner or with ported collar communication to the annulus. Since the MK-11S is a packer type tool that is fully set and then fully released after each treatment, problems associated with cup type tools are completely eliminated. Spacing between the packing elements is adjustable to suit short or long intervals. After each treatment a bypass valve above the tool opens allowing pressure equalization and clean up of sand or debris above the tool. An additional integral un-loader valve allows clean up of sand and debris from between the packing elements. The MK-11S is specifically intended for high sand volume applications and includes design features which ensure that sand will not impede operation of the tool. The tool is set and packed off with tubing tension so is equally suited for shallow or deep applications. An optional collar or profile locator allows precise location of the tool over perforations or ports. Additional accessories include, a safety release sub as well as a swivel sub.


  • Shortest most compact straddle system available ensures ease of handling and trouble free deployment in all well profiles.
  • Packer type sealing elements eliminate problems associated with cup type tools.
  • Packs off with tension for shallow or deep applications.
  • By-pass allows equalization and clean up of sand or debris from between elements.
  • Tubing mounted un-loader valve allows clean up from above elements.
  • Integral unloader valve allows clean up from between the elements.
  • When in the set position increased tubing pressure boosts pack off force.
  • Simple straight pick up and set down operation to change from run to set positions.
  • High sand concentrations will not effect operation of the tool.
  • Interval spacing completely adjustable.
  • Ideal for horizontal or vertical cased hole multi-zone stimulations.
  • Works with perforated casing or with ported collars.
  • Optional collar or profile locator for precise positioning.
  • Available in corrosion resistant alloys for hostile environments.
  • Standard and premium thread connections available.
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