BSEE has outlined the minimum RTM and RTM plan requirements in the regulations.  Since the 2016 Rule, the RTM planning requirements have been designed to be “flexible, performance-based measures that better reflect BSEE’s intention that operators use RTM as a tool to improve their own ability to prevent well control incidents while providing BSEE with sufficient access to RTM information to evaluate system improvements.”  2016 final rule preamble, 81 FR 25897; see also 2019 final rule preamble, 84 FR 21942 (“The 2016 WCR’s RTM requirements were themselves largely performance-based, relying primarily on the operator’s development of an RTM plan tailored to its operations but built off of core principles. The revisions implemented here do not reflect a sea change in philosophy…”).  With respect to enforcement, the final rule preamble states: “This regulation requires that operators develop and implement RTM plans, and specifically requires that those plans be made available to BSEE upon request.  If BSEE has any concerns with an operator’s RTM operations, then BSEE may undertake inspections and enforcement actions to ensure compliance with the regulations.  BSEE has additional options such as routine onsite inspections or verifications through the permitting process to ensure that RTM plans are implemented in compliance with the regulations.”  84 FR 21943.  The regulations since 2016 have required that operators both “develop and implement” RTM plans.  30 CFR 250.724(c) (emphasis added).  These principles are unchanged in this rulemaking.  

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As a general principle, BSEE considers the term “significant and/or prolonged” loss of RTM capability as a period of time “that potentially could increase the risk of a well-control event.”  2016 final rule preamble, 81 FR 25938.  “BSEE did not intend that proposed requirement to apply to minor or routine interruptions in RTM capabilities that pose no significant risk to safety or of a LWC.”  2016 final rule preamble, 81 FR 25897.  This regulation is not prescriptive and thus does not establish an express time period.  An operator should use its ordinary prudence and industry expertise to establish in its RTM plan which losses of RTM capability should be characterized as “significant and/or prolonged,” taking into account the prior BSEE descriptions.  Although it is generally the operator’s responsibility to initially define in its plan which losses of RTM capability will be considered “significant and/or prolonged” based on the facts associated with the RTM system’s interruption, BSEE would typically expect that a reasonably prudent operator would take action under its plan pursuant to 250.724(c)(6) if that operator loses any real-time monitoring capabilities for a 24 hour period. 

Ram BOP

Ram BOP

Ram blowout preventer (Ram BOP) is a special assembly used during drilling as part of blowout prevention system. The shut-off valves in ram preventers close by forcing or ramming themselves together. Ram BOPs close the well by rams which operate in unison and actuated by hydraulic cylinders. Ram BOP consists of BOP body, hydraulic open and close ports, bonnet, rams, bonnet seals, ram guide pins, connecting rod seals. Ram BOP has several types of rams, such as Pipe Ram, Blind Ram, Blind Shear Ram and Shear Ram. Locking Screw Housing consists of operating piston, locking screw, bonnet bolt, bonnet, ram change piston, ram change cylinder, operating cylinder, intermediate flange, plastic packing fitting, lifting eye. 

Intermediate flange separates BOP hydraulic system from the well bore ladings and contains well bore pressure. BOP body is main pressure-containing vessel which contains well bore pressure. Drilling operator usually determines specification of outlets and spools. Hydraulic ports provide means of connecting hydraulic lines for opening and closing rams, as well as providing means of maintenance. Ram change piston designed to open the bonnet assembly, as well as to allow close pressure to reach the close side of the operating piston. Replaceable sealing is provided by ram change cylinders. BOP Bonnet is a special part of BOP for hydraulic system.

Ram BOP operation principle applies hydraulic pressure to open and close the rams. Hydraulic pressure applied through the ram closed port in the BOP body moves the BOP’s operating piston inwards closing the rams. The rams are opened by hydraulic pressure applied through open ports.  

Operating fluid for onshore operation is a light hydraulic oil, which is most recommend type of fluids. Fuel oil is not recommended as it causes damage to rubber seals. Another type of operating fluids is water but having lubricant and antifreeze as a component of water mixture. Water mixture is recommended mostly for offshore drilling operations.

Maintenance of BOP consists of several operations, including bonnet opening and closing. To move the bonnet away from the BOP, the bonnet bolts shall be unscrewed, and hydraulic pressure shall be applied to closed port of ram, which provides access to the rams and other parts for maintenance. The bonnet is closed by applying hydraulic pressure though open port. Then, rams are pulled outward towards the bonnets before the bonnets begin moving toward the preventer body, assuring that rams never obstruct the bore with pipe in the hole. Hydraulic pressure holds the bonnets closed until the bonnet bolts are screwed back. Another maintenance work with BOP is bolt tensioner operation in BOPs with bolt tension system. The purpose of this operation is bonnet opening for removing bonnet bolt nut, which applies pressure to tensioner unit and its piston acts against the bolts. This stretches portion of the bolts between the threads at the tensioner and the treads in BOP body.    

In Ram BOP, wedge lock mechanism can be applied. The principle in U BOP also applied hydraulic pressure which locks and unlocks by pressure ports, thus opening and closing ram BOP.

Range of operating pressure of ram BOP is between 2000 and 15000 psi. Ram BOP is designed, fabricated, and tested as per API Spec. 16A.      

Rein Wellhead Equipment offers quality and cost-effective Ram BOPs from China, which are available in many sizes and pressure rating meeting the requirements of the client. 

Pressure

psi

2000

3000

5000

10000

If you are looking for more details, kindly visit 21 1/4”ram bop.

15000

MPa

Bore Size

Inch

7-1/16

9”

11”

13-5/8”

16-3/4”

18-3/4”

21 1/4

Hydraulic connection size

NPT

1”

Connection (Top - Bottom)

Studded - flanged

Flanged - flanged 

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