TIME DELAYED SECONDARY RETENTION MECHANISM FOR SAFETY JOINT IN A WELLBORE

摘要

Certain aspects and features of the present invention are directed to a safety joint that can be disposed in a wellbore through a fluid-producing formation. The safety joint can include a body configured to be disposed in the wellbore, a primary retention mechanism, a secondary retention mechanism, and a time delay mechanism. The primary retention mechanism can be coupled to the body and can prevent the actuation of the safety joint. The secondary retention mechanism can be coupled to the body and can prevent the actuation of the safety joint in response to the primary retention mechanism allowing the actuation of the safety joint. The time delay mechanism can generate a time delay between the primary retention mechanism allowing the actuation of the safety joint and the secondary retention mechanism preventing the actuation of the safety joint.

主权项

1. 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; a primary retention mechanism coupled to the body, the primary retention mechanism configured to prevent actuation of the safety joint; a secondary retention mechanism coupled to the body, the secondary retention mechanism configured to prevent the actuation of the safety joint in response to the primary retention mechanism allowing the actuation of the safety joint; and a time delay mechanism configured to generate a time delay between the primary retention mechanism allowing the actuation of the safety joint and the secondary retention mechanism preventing the actuation of the safety joint.