Description

 High Overpull Hydraulic/mechanical Double Acting Drilling Jar is a new Technology able to dramatically increase the allowable Overpull force. Double acting jar, designed to deliver hydraulic delay when jarring up or down, complete with a mechanical lock in each direction.  The HMDA incorporates a latch mechanism to keep the jar locked in the neutral position and eliminate unexpected jarring while tripping or racking back in the derrick.

Features / Benefits

•   Hydraulic/mechanical Double Acting Drilling Jar is normally operated in the latched position to reduce unexpected jarring while  drilling, and eliminates movement between jar components to increase service life.
  
•   Hydraulic/mechanical Double Acting Drilling Jar operates with a simple up and down motion and is not affected by torque.
  
•   The spline drive and latch mechanism are enclosed in a single, sealed oil chamber without ports that might fill with cuttings and             restrict the down jar stroke.
  
•   The hydraulic delay mechanism is located in a separate chamber to prevent contamination and increase reliability.
  
•    With the latch mechanism in the cocked or latch position ,the inner mandrel and outer housing act integrally ,virtually eliminating seal and inner tool wear during normal drilling condition. There is no need to open or extend the jar before running in the hole.