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Circulating Sub
High Performance Accessory
The Drop Ball Circulating Sub is designed to run immediately above or
below the BHA. Activation is accomplished by dropping the S.S. Ball from
the surface and applying pump pressure. This causes the shear pins in the
sub to shear, allowing the Sleeve to drop from its primary position to its
secondary position, opening the two sub ports which divert the flow to the
annulus.
Tool Assy Tool OD
Tensile Yield lbf (kN)
Torsional Yield ft*lbf (N*m)
Standard Drop Ball Size
Pressure Rating psi (kPa)
615-313
3-1/8"
236,000 (1,050)
4,500 (189)
15/16" (23.8 mm)
5,000 (34.5)
615-475
4-3/4"
445,000 (1,979)
13,500 (568)
2-1/4" (57.15 mm)
5,000 (34.5)
615-650
6-1/2"
602,000 (2,677)
23,000 (969)
2-1/2" (63.5 mm)
5,000 (34.5)
615-800
8"
1,200,000 (5,337)
51,000 (2,149)
2-1/2" (63.5 mm)
5,000 (34.5)
™©2016 Logan International Inc. All rights reserved. PDS/LOT/CS 3-29-2016