Downhole tools for launching obturating members within a wellbore

A remote launch sub, comprising:

• a first sub extending between an uphole end and a longitudinally opposed downhole end and comprising a hollow body and a receptacle;
• a second sub extending between an uphole end and a downhole end and having a central passage in which at least a portion of the first sub is disposed;
• and
• an obturating member secured in the receptacle, wherein the obturating member is releasable from the first sub in response to concurrent application of a threshold axially directed force and a threshold fluid pressure to thereby transition a disconnect device coupled to the remote launch sub from a locked state physically locking and restricting relative axial movement to an unlocked state permitting relative axial movement.

A remote launch sub, comprising:

• a first sub extending between an uphole end and a longitudinally opposed downhole end and having a central passage;
• a second sub extending between an uphole end and a downhole end and having a central passage in which at least a portion of the first sub is disposed;
• and
• an obturating member releasable from the first sub in response to application of a threshold axially directed force to the remote launch sub.

A method for launching an obturating member in a wellbore, the method comprising:

• (a) deploying a drillstring comprising a tubular string, a remote launch sub and a BHA into a wellbore;
• wherein the remote launch sub is coupled to the tubular string and the BHA, and wherein the remote launch sub comprises a first sub connected to a second sub and an obturating member;
• (b) concurrently applying a threshold axially directed force along with a threshold fluid pressure to the first sub through the tubular string;
• and
• (c) releasing the obturating member from the remote launch sub.