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Delta Engineering SE
Mechanical and Ocean Solutions

Blowout Preventer Landing Assist Tool (BLAT)

The BLAT is used to assist in landing a BOP (Blowout Preventer) onto a subsea wellhead. It is is threaded onto 6 5/8" drill pipe (FH or XT-57 Threads), which can be modified per customer request. The BLAT is then lowered through the Telescopic Joint (TJ) and Riser until the BLAT's Anti-Torque Boss makes contact with the Pup Transition Joint(PTJ). The PTJ is bolted between the TJ and riser.

The video shown below is an animation of the BLAT's components and functionality which can be shown to potential customers.

Rotating the drill pipe clockwise (CW) or counterclockwise (CCW) results in the BLAT's load arms extending or retracting. When extended, the load arms make contact with the inner surface of the PTJ, which allows tension to be applied to the drill pipe. Applying more tension to the drill pipe lifts the TJ, PTJ, BLAT, Riser, and BOP. The BLAT has a Safe Working Load of about 2,000 kips.

BLAT Lowered Through Riser

This image shows the BLAT being lowered through the riser to connect with the Blow Out Preventer.

Shown are the riser, choke and kill p-lines, mud p-line , and gas p-lines.