Source: https://www.ecfr.gov/cgi-bin/text-idx?mc=true&node=se30.2.250_1734&rgn=div8
Timestamp: 2020-08-09 06:02:31
Document Index: 263365579

Matched Legal Cases: ['art 250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250', '§250']

Title 30 → Chapter II → Subchapter B → Part 250 → Subpart G → §250.734
§250.734 What are the requirements for a subsea BOP system?
(ii) Both shear rams must be capable of shearing at any point along the tubular body of any drill pipe (excluding tool joints, bottom-hole tools, and bottom hole assemblies such as heavy-weight pipe or collars), workstring, tubing and associated exterior control lines, appropriate area for the liner or casing landing string, shear sub on subsea test tree, and any electric-, wire-, slick-line in the hole; under MASP. At least one shear ram must be capable of sealing the wellbore after shearing under MASP conditions as defined for the operation. Any non-sealing shear ram(s) must be installed below a sealing shear ram(s).
(3) Have the accumulator capacity, to provide fast closure of the BOP components and to operate all critical functions; The accumulator capacity must:
(i) Close each required shear ram, ram locks, one pipe ram, and disconnect the LMRP.
(ii) Have the capability to perform ROV functions within the required times outlined in API Standard 53 with ROV or flying leads.
(iii) Have bottles located subsea for the autoshear and deadman (which may be shared between those two systems) to secure the wellbore. These bottles may also be utilized to perform the secondary control system functions (e.g., ROV or acoustic functions).
(4) Have a subsea BOP stack equipped with remotely operated vehicle (ROV) intervention capability; You must have the ROV intervention capability to close each shear ram, ram locks, one pipe ram, and disconnect the LMRP under MASP conditions as defined for the operation. You must be capable of performing these functions in the response times outlined in API Standard 53 (as incorporated by reference in §250.198). The ROV panels on the BOP and LMRP must be compliant with API RP 17H (as incorporated by reference in §250.198).
(iv) Autoshear/deadman functions and an EDS mode must close, at a minimum, two shear rams in sequence and be capable of performing their expected shearing and sealing action under MASP conditions as defined for the operation.
(v) Your sequencing must allow a sufficient delay when closing your two shear rams in order to provide maximum sealing efficiency.
(7) Demonstrate that any acoustic control system will function in the proposed environment and conditions; If you choose to use an acoustic control system in addition to the autoshear, deadman, and EDS requirements, you must demonstrate to the District Manager, as part of the information submitted under §250.731, that the acoustic control system will function in the proposed environment and conditions. The District Manager may require additional information as appropriate to clarify or evaluate the acoustic control system information provided in your demonstration.
(12) Before removing the marine riser, displace the fluid in the riser with seawater; You must maintain sufficient hydrostatic pressure or take other suitable precautions to compensate for the reduction in pressure and to maintain a safe and controlled well condition. You must follow the requirements of §250.720(b).
(16) Use a BOP system that has the following mechanisms and capabilities; (i) No later than May 1, 2023, you must have the capability to position the entire pipe completely within the area of the shearing blade. This capability cannot be a separate ram BOP or annular preventer, but you may use those during a planned shear.
(ii) If your control pods contain a subsea electronic module with batteries, a mechanism for personnel on the rig to monitor the state of charge of the subsea electronic module batteries in the BOP control pods.
(b) If you suspend operations to make repairs to any part of the subsea BOP system, you must stop operations at a safe downhole location. Before resuming operations you must:
(1) Submit a revised permit with a written statement from an independent third party documenting the repairs and certifying that the previous certification in §250.731(c) remains valid;
(2) Upon relatch of the BOP, perform an initial subsea BOP test in accordance with §250.737(d)(4), including deadman in accordance with §250.737(d)(12)(vi). If repairs take longer than 30 days, once the BOP is on deck, you must test in accordance with the requirements of §250.737;
(3) Upon relatch of the LMRP, you must test according to the following:
(i) Pressure test riser connector/gasket in accordance with §250.737(b) and (c);
(ii) Pressure test choke and kill stabs at LMRP/BOP interface in accordance with §250.737(b) and (c);
(iii) Full function test of both pods and both control panels;
(iv) Verify acoustic pod communication (if equipped); and
(v) Deadman test with pressure test in accordance with §250.737(d)(12)(vi).
(4) Receive approval from the District Manager.
[81 FR 26022, Apr. 29, 2016, as amended at 84 FR 21980, May 15, 2019]