8/11/2019 subsea - page 12
1/12
SubseaBOP Stack
Arrangements
8/11/2019 subsea - page 12
2/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 Subsea BOP Stack Arrangement
Table Of ContentsSection 12
Page
1. Subsea BOP Stack Arrangement - A 1
2. Subsea BOP Stack Arrangement - B 2
3. Subsea BOP Stack Arrangement - C 3
4. Subsea BOP Stack Arrangement - D 4
5. Subsea BOP Stack Arrangement - E 56. Subsea BOP Stack Arrangement - F 6
7. Subsea BOP Stack Arrangement - G 7
8. Subsea BOP Stack Arrangement - H 8
9. NTL No. 99-G09 MMS Letter to Lessees 5/10/99 9
8/11/2019 subsea - page 12
3/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 1 Subsea BOP Stack Arrang ement
1) Subsea BOP Stack - Arrangement A
UpperAnnular
Connector
LowerAnnular
Connector
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
LIK LOK
UOC UIC
LOC LIC
Features
1. Can hang off on 2 piperams circulating normally.
2. Can hang off all pipe ramswith shear ram closed.
3. No outlet below lower ram.4. Two routes to circulate kick
with pipe rams closed.
8/11/2019 subsea - page 12
4/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 2 Subsea BOP Stack Arrang ement
2) Subsea BOP Stack - Arrangement B
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
Features1. Can hang off all pipe rams.2. Can hang off on 2 pipe
rams with shear ramclosed.
3. Two routes to circulate kickwith pipe rams closed.
8/11/2019 subsea - page 12
5/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 3 Subsea BOP Stack Arrang ement
3) Subsea BOP Stack - Arrangement C
Features
1. Can hang off all pipe ramscirculating normally.
2. Can hang off on 3 piperams with shear ramclosed.
Upper
Annular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
8/11/2019 subsea - page 12
6/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 4 Subsea BOP Stack Arrang ement
4) Subsea BOP Stack - Arrangement D
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
Features
1. Can hang off 2 pipe ramscirculating normally.
2. Can hang off on 1 piperams with shear ramclosed.
3. One route to circulate kickwith pipe rams closed.
4. No outlet under lower pipe
ram.
8/11/2019 subsea - page 12
7/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 5 Subsea BOP Stack Arrang ement
5) Subsea BOP Stack - Arrangement E
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
Features
1. Can hang off all pipe ramscirculating normally.
2. Can hang off on 2 piperams with shear ramclosed.
8/11/2019 subsea - page 12
8/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 6 Subsea BOP Stack Arrang ement
6) Subsea BOP Stack - Arrangement F
Features
1. Can hang off all pipe ramscirculating normally.
2. Can hang off on 3 piperams with shear ramclosed.
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
UOK UIK
8/11/2019 subsea - page 12
9/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 7 Subsea BOP Stack Arrang ement
7) Subsea BOP Stack - Arrangement G
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UOC UIC
LOC LIC
Features
1. Upper and Lower Annularis on the LMRP.
8/11/2019 subsea - page 12
10/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 8 Subsea BOP Stack Arrang ement
8) Subsea BOP Stack - Arrangement H
UpperAnnular
Connector
LowerAnnular
Blind Shear
Upper PipeRam (UPR)
Middle PipeRam (MPR)
Lower PipeRam (LPR)
Connector
LIK LOK
UIK UOK
C/K Isolation
C/K Isolation
UOC UIC
LOC LIC
Features
1. Upper Inner and Outer KillValves below the Upper
Annular.2. C/K Isolation Valves are on
the LMRP package. Note:these valves are normallyopen.
8/11/2019 subsea - page 12
11/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 9 Subsea BOP Stack Arrang ement
UNITED STATES DEPARTMENT OF THE INTERIORMINERALS MANAGEMENT SERVICE
GULF OF MEXICO OCS REGION
NTL No. 99-G09 Effective Date: May 10, 1999
NOTICE TO LESSEES AND OPERATORS OF FEDERAL OIL, GAS, AND SULPHURLEASES IN THE OUTER CONTINENTAL SHELF, GULF OF MEXICO OCS REGION
Location of Choke and Kill Lines on BOP Stacks
This Notice to Lessees and Operators (NTL) supersedes the Letter to Lessees andOperators, dated November 17, 1994, on this subject. It updates regulatory citationsand includes a statement on the Paperwork Reduction Act of 1995.
The purpose of this NTL is to specify the location of the choke and kill lines servingblowout preventer (BOP) stacks. This is necessary because the requirements at 30CFR 250.406 (oil and gas drilling operations), 250.515 (oil and gas well-completionoperations), 250.615 (oil and gas well-workover operations), 250.1610 (sulphur drillingoperations), and 250.1624 (sulphur well-completion and well-workover operations) donot specify their exact location.
Operators usually install the choke and kill lines above the bottommost ram. However,some operators have requested to install them below the bottommost ram. For chokelines, this is not acceptable. Failure of a choke line installed below the bottommost ramcould result in a blowout because this configuration does not provide a backup systemfor proper well control.
Therefore, the Gulf of Mexico OCS Region District Offices will not approve anApplication for Permit to Drill (APD) or a Sundry Notice and Report (Sundry) to conductwell-workover operations that indicates a BOP stack with a choke line installed belowthe bottommost ram. However, they may approve your requests to install a kill linebelow the bottommost ram. You must include a schematic drawing of the BOP stack
and choke and kill lines with any APD or well-workover Sundry if the tree is to beremoved.
Paperwork Reduction Act of 1995 Statement
This NTL refers to the collection of information on forms MMS-123 and MMS-124. TheOffice of Management and Budget (OMB) has approved the information collectionrequirements for these forms and assigned OMB Control Nos. 1010-0044 and 1010-
8/11/2019 subsea - page 12
12/12
Subsea Engineer s Handbook Section 12
In-Spec Inc. 1999 10 Subsea BOP Stack Arrang ement
0045, respectively. This NTL does not impose additional information collectionrequirements subject to the Paperwork Reduction Act of 1995.
Contact
If you have any questions on this NTL, you may contact Mr. Bill Martin at (504) 736-2849.
Chris C. Oynes
Regional Director