Sub Sea BOP is one of the most critical well control equipment in deep water drilling and it is a good topic for everybody working on the rig to learn.
Today, we would like to share a valuable VDO training regarding the basic of sub sea BOP. Additionally, we provides learner full VDO transcript to accelerate your learning curve.
Basic Understanding of Sub Sea BOP VDO Transcript
Subsea BOP equipment is similar to a surface stack. There are however some very important differences. This section discusses these differences.
Subsea stacks attached to the well head on the seafloor meanwhile the rig floats on the water hundreds of thousands of feet or meters above. Major parts include;
BOP stack – this is a lot like a surface BOP stack. Other parts are different however, here is the flexible, or ball joint the marine riser with the choke line and kill line, guidelines, the telescopic joint with riser tensioners, the hose bundle and two control pods.
The generic controls the subsea BOP valves from an electric BOP control panel on the rig. This subsea hose bundle carries control signals and the hydraulic fluid from the rig down to the control pod and selected subsea BOP valves.
Marine riser pipe with special pipes and fittings.
It fills from the top of the subsea BOP stack and the drilling equipment located on the floating rig. Crew members run the drill string into the hole inside the riser pipe. The riser pipe also conducts drilling fluid up to the rig. Manufactures attach two smaller pipes called the choke and kill lines to the outside. Crewmembers use them to control the well during a kick or special operations.
Guidelines guide and help position equipment such as the BOP stack to ocean floor. The flexible joint cuts down on bending stresses from the riser pipe and BOP. The telescopic joint compensates for the vertical motion of the floating rig. Crewmembers also attach the riser tensioning system to it.
Riser tensioner lines support the riser pipe. The riser and guideline tensioners put constant tension on the riser pipe and guidelines. This tension suspends the riser pipe. It also compensates for the movement of the rig caused by wave action. Riser tensioning systems usually range in capacity to over 300,000 to almost 1,000,000 pounds and 135,000 to 455,000 kg with 50 feet or 50 m of wire line travel. They utilize up to 12 compression loaded tensioners that use air pressure for compensation.