API 16A Double Ram BOP – Pipe, Blind, VBR & Shear Ram Configurations

RIGRS Double Ram BOP

RIGRS supplies double ram BOPs for drilling and workover applications requiring two independent ram functions in one preventer body.
Typical configurations include Pipe Ram + Blind Ram, Pipe Ram + Blind Shear Ram and Variable Bore Ram + Blind/Shear Ram. The final configuration should be selected according to bore size, working pressure, tubular OD, well-control requirement and available stack space.

According to the number of rams, it can be divided into single ram BOP, double ram BOP, triple ram BOP;

According to the function of the ram, it can be divided into full-sealed ram BOP, semi-sealed ram BOP, shear ram BOP, variable ram BOP;

According to the locking method, it can be divided into manual locking ram BOP, hydraulic locking ram BOP;

According to the side door switch mode, it can be divided into rotary side door ram BOP, linear motion side door ram BOP.

Ultra-high pressure Double Ram BOP is used for drilling and development of deep, ultra-deep, and unconventional oil and gas fields. The ultra-high pressure Double Ram BOP is made of metal materials with high strength, high toughness, and hydrogen sulfide resistance, and rubber materials with high-pressure sealing. Anti-corrosion alloy surface treatment technology is adopted for the Double Ram BOP inner cavity. It has high safety, reliability, and convenient operability. The design technology, manufacturing process, and performance of the ultra-high pressure Double Ram BOP have reached the international advanced level.

Ram BOP Features:

• Double ram BOP suspends and stabilizes string
• Double ram BOP with side outlets could be used for choke and blowout
• Double ram BOP can be used in operation under pressure
• Double ram BOP seals annular space between tubing and casing or wellbore

Why Open / Close Volume and Closing Ratio Matter

Hydraulic operating data should be checked when installing a replacement BOP or integrating the unit into an existing system.
Open / close volume affects the hydraulic fluid volume required to operate the rams.
Closing ratio helps engineers evaluate the relationship between hydraulic operating pressure and ram closing force.
Buyers replacing an existing BOP should compare this data with the existing equipment rather than checking bore and working pressure alone.

RIGRS Ram BOP – FAQ

Q1: What ram combination should I use in a double ram BOP?

A: The combination depends on required functions. Common configurations include Pipe + Blind, Pipe + Blind Shear, VBR + Blind and VBR + Blind Shear.

Q2: Can a VBR replace several fixed pipe rams?

A: A VBR can cover several tubular ODs within its qualified range, reducing the need for multiple fixed pipe-ram sizes. The exact range must be confirmed for the specific ram.

Q3: Why should I check BOP open and close volumes?

A: They help confirm whether the existing hydraulic system can operate the replacement BOP correctly and provide sufficient fluid volume.

Q4: What dimensions are needed for a replacement BOP?

A: Flange-to-flange height, body width, bonnet-open clearance, connection specification and weight should be checked.

Q5: What information is required to verify a shear ram?

A: Provide pipe OD, wall thickness, grade and available hydraulic operating pressure. Additional tubular details may be required depending on the application.

Q6: Can you quote from an existing BOP drawing?

A: Yes. An existing GA drawing, nameplate and stack arrangement are useful for checking basic dimensional and connection compatibility before quotation.