The LiMAR® High Pressure Motorhead Assembly (MHA) is an evolution of the LiMAR® MHA, designed to operate in the harshest of environments to a working pressure of 15,000 psi.

The MHA houses LiMAR® Single Piece Double Flapper Check Valves, Hydraulic Disconnect and a Dual Circulation Sub in one combined unit. The user has the option of dressing the tool to permit circulation after dropping the ball but prior to disconnecting, a valuable feature in circumstances where the Coiled Tubing is stuck above the BHA.

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  • For use in the BHA directly below the CT connector
  • To provide a double barrier from well pressure & contents
  • Torque-thru hydraulic disconnect option for contingent release
  • Integral dual circulating function for coil-to-tubing circulation
  • For use in height restricted rig-ups
  • Specifically designed for high pressure applications


  • Fishing operations in conjunction with high impulse jars and impact hammers
  • Milling operations in conjunction with hi-torque PDM motors
  • Explosive perforating operations
  • Abrasive perforating operations with availability of especially hardened MHA internals
  • Packer setting operations in conjunction with Inflatable, Hydraulic & Explosive setting tools
  • Acidising, Cementing & Stimulation operations
  • High Temp / High Pressure operations


  • Single piece cartridge type Double Flapper Check Valve safety system
  • Superior torque rating
  • High tensile and compressive strength rating
  • Proprietary High Pressure Tool Joint
  • Optional flow paths during disconnecting
  • 15,000 psi Safe Working Pressure
  • Drop Ball operated release and circulating feature with maximised flo area
  • Benoil type rupture disc fitted as standard
  • Disconnect Sub fitted with LiMAR GS type internal fish neck profile
  • Selected components QPQ treated
  • Hexagonal flats for safe make-up & break-out
  • Connection options to suit customer requirements
  • Corrosion resistant materials
Assembly Part No. Actual OD Maximum ID Disconnect GS Profile Make up Length
230-1687-XXX-RX 1.687"  0.375"  1-1/2" GS 26.18"
230-2125-XXX-RX 2.125" 0.500" 2" GS 29.34"
230-2875-XXX-RX 2.875" 0.937" 3" GS 35.35"

XXX - Last 3 digits of part number denotes connection type - Please refer to the connection code data sheet.
For additional sizes or further information please contact sales

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