The Switch Sub is a multi-conductor device that enables the tractor conveyance of non-rigid downhole seismic geophone arrays into highly deviated and horizontal wells. The Switch Sub is positioned at the top of the toolstring (between the cable head and geophone array) and the PowerTrac® tractor is placed below the seismic tools.
The device has two positions controllable via surface command:
Service Name | Switch Sub 371 |
Tool body outer diameter | 3.15 inches/80.0mm |
Length | 2.50 ft./0.76m |
Minimum restriction ID | 3.28 inches/83.3mm |
Pressure rating | 15,000 psi/1,034 bar |
Temperature rating | 177 °C/350 °F |
Electrical feed through | Yes |