The adaptor is mounted in the drilling tubing in areas of possible formation collapse or potential tool replacement areas. The latch adaptor allows disconnecting the drilling string (with the adaptor itself) from the drilling device in case of formation collapse.

Technical Specifications:

Outside diameter, mm, max 178  
Inside diameter, mm, min  101   
Length, mm  532   
Connecting threads (upper and lower) according to GOST 5286, mm      Z-147 
Ratio of maximal torque to the turning time  2,5-3
Weight, kg  40