API 16A double ram bop blowout preventer shaffer drilling bop

1,standardAPI 16A 2,Bore dia.7 1/16(180mm)26 3/4(680mm) 3.Pressure:14MPa to 140MPa 4.Produced according to your requirement

  Application

The ram BOP is designed to seal off the tubular annulus or the well. With the ram BOP in the closed position, such operation as circulating drilling fluid, re-leasing pressure and killing the well can be special circumstances; the ram BOP can shear the pipe in the hole to seal off the well. if the ram BOP has variable bore rams ,it can seal off the annular space between the casing and pipes whose sizes are at the mini-mum and maximum of the ram’s range.

  Structural Features

  Body Structure

Shape. The BOP has a body similar to square shape, having a vertical bore through which the pipes can pass and ram cavities in which the rams move in the horizontal direction

Connection types. The BOP are offered with studded, flanged and hubbed top and bottom connections. The sizes of flanges, bolts, clamps and ring grooves all conform to API 16A

  Ram structure

For dual-face ram, the upper face and lower face of the ram are exactly symmetrical. Various drilling tools with different sizes in only necessary to replace the semi-annular rubber sealing ring and ram compact, the others can be interchanged;

  Seal of Ram

The seal of the ram putting into effect of the packing wellhead must depend on four seals. i.e. the seal between the top of ram and housing, the seal between the fore-end of the ram and the pipe -line, the seal between the housing and the side-gate and the seal between piston rod and the side-gate.

  Looking Mechanism of Ram

The manual locking device depends on manpower to rotate handwheel to close or lock the rams. It shall be noted that the manual locking device only can be used to close rams. Be sure to make the manual locking device return to the original position to unlock the rams before opening the rams with hydraulic pressure.

Operating Requirements

  As blowout happens, full-enclosed ram BOP is able to pack off an empty well or semi-enclosed ram is able to pack off the drilling tool with the same size as the ram. If long time of well close is necessary, the ram should be locked up manually and a nameplate should be provided for indication. The wheel is pulled to the station prior to turned back at 1/4~1/2circuit.

  Before opening rams, check whether the manual locking device is unlocked or not. Every time after opening rams, check whether rams are in the full open position or not in order to prevent pipes from damaging rams.

  Release pressure in the control manifold before opening or closing the door in order to prevent damage to O-Ring of the hinge. If the door is not in the full open position or its bolts not installed well, it is not allowed to open or close rams with hydraulic pressure

The ram preventer produced by our company is divided into three forms in structure: HHC type (casting structure), HHF type (forging structure), HHH type (manual structure).