| abstract |
A coiled tubing drill system for use in a subsea environment for providing a subsea injector head, coiled tubing, a drill mechanism for drilling, reaming and sampling, and a subsea coiled tubing winch with synchronized control and automatic racking of the subsea injector head, sufficient drilling and back-drag forces required for drilling operations, wherein: the coiled tubing is carried on the underwater coil winch, the tail end of the coiled tubing is connected with the drilling tool mechanism, and in the operation process, the coiled tubing is pushed and pulled back by the clamping force of the underwater injection head on the coiled tubing. The underwater directional drilling device is main equipment for underwater drilling, reaming and sampling, can be arranged on an equipment platform, realizes automatic directional drilling operation on the seabed through water surface remote control operation, and is suitable for seabed sunken ship salvaging, seabed pipeline non-excavation installation, seabed geological detection and sampling and the like. |