Patent ID: 9745836
Date: 2017-08-29
CPC Classifications: E21B

Claim:
1. An assembly including a safety joint configured to be disposed in a wellbore through a fluid-producing formation, the safety joint comprising: a body configured to be disposed in the wellbore, the body movable between a first position and a second position; a primary retention mechanism coupled to the body, the primary retention mechanism configured to be in a first state to prevent actuation of the safety joint and to be in a second state to allow the actuation of the safety joint; a secondary retention mechanism coupled to the body, the secondary retention mechanism configured to be in a third state to prevent the actuation of the safety joint and to be in a fourth state to allow the actuation of the safety joint, the body being movable to the second position to place the secondary retention mechanism in the third state in response to the primary retention mechanism being in the second state; and a time delay mechanism configured to generate a time delay and prevent the safety joint from actuating during the time delay, the time delay being the time between the primary retention mechanism being in the second state and the body being movable to place the secondary retention mechanism in the third state.