Connecting device suitable for under oil well

The utility model discloses a connecting device suitable for under oil well, including the first shell in malong, malong first shell is inside set gradually the torpedo body, installation base, safeties, swivelling joint head the torpedo body, safeties install the base from the both sides embedding respectively, the first envelope inner layer in malong is provided with the sealing layer, still including sealed chamber, sealed chamber sets up in swivelling joint head side. The utility model discloses a with the torpedo body, safeties installs the base from the both sides embedding respectively,swivelling joint head side sets up sealed chamber, with the torpedo body, safeties embedding installation base can stabilize more, avoid the process interrupt that connecting device was using to openthe work that influences, adopt sealed chamber in addition, insurance such as sealing layer measure, can the effectual leakproofness that improves the device, insulating nature, avoidance means in the pit when using the oil d