Coiled Tubing BOP-Quad Ram BOP
When the tubing exists in the well,with the help of packing of certain size,the BOP can close the circular between the bore and pipe string and prevent the fluid in the well from overflowing.
when there is no string in the well,the BOP can completely close the well head with blind ram.
when in emergency,a slip ram may be used fasten the tubing,and then a shear ram may be used to cut off the tubing in the well,then a blind ram can be used to seal the wellhead completely.
when in emergency,the tubing in the well gose up or down,a silp ram may be used to lock the tubing to avoid any accident.
when the well is closed,with the help of kill manifolds and chock manifolds connected to the spool and side outlet on the body,the BOP can realize some special operations such an throttling and relief.