Function of Annular BOP
Annular BOP can be used only after being provided with hydraulic control system. Usually it is used by either forming a complete set with ram BOP or independently. It can finish the following operations:
● It can be used to seal the tools with different shapes and dimensions such as Kelly, drill pipe joint, drill collar ,casing and cable and so on.
● When there is no drilling tool in the well, It can seal the wellhead completely.
● Under the circumstance of using the Buffer-Storage device ,It can strip –in/out the drilling tools through 35/18 degree butt-welding the drill pipe joints.
Function of Ram BOP
Ram Bop can be used to control the wellhead pressure and effectively prevent the blowout accident in the process of drilling and workover and so on. It can finish the following operations.
● When there is drilling string in the well, It can seal the annular space after it is equipped with the proper pipe rams.
● When there is no drill string in the well, It can seal the wellhead completely after it is equipped with the proper blind rams. In case of emergency, The shear rams can be used to cut offer the drill strings left in the well and seal the wellhead completely.
● Under the circumstances of enclosing the well, It can perform the special operations such as mud circulation , choke and flow, Kill and clean-out etc. Through the choke manifold and kill manifold that are connected to the drilling spooland its shell’s side outlets;
● When it is used together with the choke manifold and kill manifold , It can be effectively control the bottom-hole pressure and acknowledge the near-balance kill operation.
Rating Working Pressure Code
Rating Working Pressure (psi)
Rating Working Pressure (mpa)
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