![]() ![]() Section 6.2.3.2.2 a) advises what the minimum nominal I.D. Question: Do Sections 6.3.1.1, 7.3.1.1, and 7.4.1.1 require in-service control systems to always be 100% in compliance with the latest API 16D, or are these sections referring only to specific requirements of 16D like the precharge? API 53 also states in various sections that you shall meet API 16D, Method A, B, or C for precharge calculations, which is calling out a specific requirement of API 16D. Sections 6.3.1.1, 7.3.1.1, and 7.4.1.1 state “Control systems for subsea BOP stacks shall be designed, manufactured, and installed in accordance with API 16D”. This can also be affected by a contractual agreement or regulatory requirements.ĪPI 53, Section 2 (Normative References), states “For undated references (no date included in the listing), the latest edition of the referenced document applies”. The intent is that compliance with the normative references applies at the time the rig is built and/or the BOP system or components are installed. Therefore, in service equipment on a rig may not comply with all of the requirements of the latest edition of the relevant equipment specification. If it is repaired or remanufactured, it may be brought up to the latest edition of the equipment specification if possible. The intent is that the pipe ID be as close as practical to the ID of the valves.īackground: When a piece of equipment is built to an API equipment specification it complies with the specification at the time it was built. Referring to Section 6.2.3.2.2, can you please clarify further the meaning of the size range shown and your interpretation of nominal diameter? For the specific well mentioned in this question, the equipment can only be tested to 5000 psi (see 6.5.3.2.6). Reply 1: API 53 does not address de-rating. Question 2: Is only one remote operated choke is required? ![]() Question 1: Referencing 6.2.2.8 and 6.2.2.9, is it correct that the equipment is technically de rated to 5000 psi for the wellhead? The choke manifold has one remote operated drilling choke. The equipment is being used on a 5000 psi well head. Referring to Section 6.1.2.12, can a surface BOP stack arrangement with one annular, one blind shear ram, and two pipe rams, with the fifth device being optional, be considered a Class 5 stack arrangement?īackground: A drilling contractor has a well control system with BOPs, choke and kill manifolds rated at 10,000 psi. The stack must contain one annular, one blind shear ram, two pipe rams, and the fifth device can be an annular or pipe ram. Reply No a Class 5 surface BOP stack arrangement must contain five devices at a minimum. API Std 53 - Blowout Prevention Equipment Systems for Drilling Wells Last update: August 12, 2015 ![]()
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