DUAL CIRCULATING SUB

Limar Oil Tools

Coiled tubing

In the event that circulation is lost, a rupture disc within the Dual Circulating Sub is activated by applying pressure, thus regaining circulation. With the disc ruptured, a drop ball can be pumped down to the BHA for activating a hydraulic disconnect sub, or the secondary circulating piston within the
LiMAR® Dual Circulating Sub. The pressure at which the drop ball activates the circulating piston is determined by the number of shear screws used.

TOOL APPLICATIONS:
To provide a contingent circulating facility within a Coil Tubing BHA

DESIGN FEATURES & BENEFITS:
Selective shear pressure ratings
Standard Benoil rupture disc port
Large thru bore
Connection options to suit customer requirements
Simple, robust design ensuring ease of operation for the end user
Selected components QPQ treated
Hexagonal flats for safe make-up & break-out
Corrosion resistant materials
Assembly Part No. Actual OD Maximum ID Make up Length
112-1500-XXX-RX 1.500" 0.250" 7.35"
112-1687-XXX-RX 1.687" 0.437" 8.00"
112-1750-XXX-RX 1.750" 0.437" 8.00"
112-2125-XXX-RX 2.125" 0.562" 8.13"
112-2375-XXX-RX 2.375" 0.562" 8.23"
112-2875-XXX-RX 2.875" 0.937" 8.50"
112-3125-XXX-RX 3.125" 1.187" 11.06"