Collet Connectors For BOP Stacks Connector Brochure
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Collet Connectors
Connectors for BOP stacks
Drilling challenge
Offshore drilling environments have ventured into increased water depths,
greater pressures, and harsher environments. Collet connectors need to
be reliable with a long fatigue life to help drillers improve safety, minimize
operational downtime, and maximize equipment availability and uptime.
Cameron collet connectors
Our collet connectors continue evolving to provide greater bending and
tension capabilities in deeper waters and higher pressures. These collet
connectors are designed to withstand the bending stresses and separating
forces caused by well pressure, riser tension, and vessel motion for long,
reliable operation. With five models to choose from, our collet connectors
meet various preload requirements to help resist hub separation. All
of these collet connectors utilize metal-to-metal sealing to ensure seal
integrity and perform successful disconnect when required for enhanced
operational safety.
Working pressures: up to 15,000 psi†
† Cameron is currently developing a 20,000 psi connector line of products
Applications:
■ BOP stack to wellhead connection
■ LMRP to lower stack connection
Features:
■ High strength and stiffness with a direct load path through
the connector
■ Cameron-designed AX, CX, and AX/AT gaskets. Other gasket designs are
also available
■ Positively driven-open collet segments during unlock with a secondary
unlock function for successful disconnect
■ Inconel inlays on all sealing surfaces exposed to seawater
■ Option of studded, flanged, or clamped tops
■ Inherent self-locking characteristics
Collet Connector Selection
Cameron offers five collet connector models that meet varying connection sizes and
types, preload requirements, and height restraints.
EVO-Con* collect connector
■ Built upon proven design
■ Interchangeable parts allow ultimate versatility—the same connector fits various wellhead brands
and sizes (including 27-in H4 and 30-in H4)
■ Strength of DWHC with a shorter swallow
■ Simple design has only one hydraulic circuit which uses less hydraulic fluid for locking and unlocking
Technical Specifications
Model 70 HC HCH4 EVO-Con DWHC
Preload, lbf Up to 245,000 Up to 5.91 MM Up to 4.34 MM Up to 8.92 MM Up to 12.05 MM
Height, in [mm] 38.45 [797.31] 44.00 [1117.60] 44.00 [1117.60] 63.06 [1601.7] 66.78 [1696.21]
Maximum Subsea Wellhead OD, in [mm] 31.39 [797.31] 31.39 [797.31] 27.00 [685.80] 30.00 [762.00] 35.25 [895.35]
Maximum Connector OD, in [mm] 64.00 [1625.60] 62.00 [1574.80] 62.00 [1574.80] 72.00 [1828.80] 75.25 [1911.35]
EVO-Con collet connector
Model 70* collet connector
■ Cylinders may be easily repaired or replaced
■ Short swallow, tapered hub profile and positive unlocking system allow disconnection at
angles up to 30°
■ 25° angles on the clamp segment faces and a large actuating piston area create a greater
clamping force at a given hydraulic pressure
■ Standard manual override
■ Actuated by hydraulic cylinders which provide high clamping preloads
HCH4
■ Includes standard HC operating system and load carrying components
■ Unique locking design includes three load shoulders on the collet segment or fingers, allowing the
HC connector to lock onto an H4 wellhead and maintain a direct load path
■ Designed specifically to fit on a mandrel-style hub
■ Simple design has only one hydraulic circuit which uses less hydraulic fluid for locking and unlocking
HC* high-capacity collet connector
■ Short swallow, tapered hub profile and positive unlocking system allows disconnection at
angles up to 30°
■ Shortest swallow of any major wellhead connector available on the market
■ Large actuating piston area creates a greater preload at a given hydraulic pressure than the Model 70
■ Higher applied loads can be tolerated without causing hub face separation because of the
higher preloads
■ Uses annular cylinder with larger annular piston for higher locking and unlocking force
■ Compact design minimizes height and weight
■ Has a hydraulic secondary unlock
■ Simple design has only one hydraulic circuit which uses less hydraulic fluid for locking and unlocking
DWHC* deepwater, high-capacity collet connector
■ Engineered for high loads encountered in ultra-deepwater applications
■ Segment and hub geometry and a large actuating piston area create a greater clamping force
■ Flange exceeds API standards with a thicker neck, a larger bolt circle, and a larger bolt diameter to
match the capacity of the DWHC
■ Hub profile accommodates high load-carrying capacity
■ Provides 21MMlb total equivalent tension capacity, based on API design criteria
■ Simple design has only one hydraulic circuit which uses less hydraulic fluid for locking and unlocking
Model 70 collet connector
HCH4 collet connector
HC collet connector
DWHC collet connector
Operational Data and Dimensions
Model 70 connector
C
D
A
B
EVO-Con connector
C
D
A
B
HC connector
C
A
B
D
HCH4 connector
A
C
B
D
DWHC connector
A
C
B
D
Collet Connector Dimensions
Bore wellhead
size, in
Working
pressure, psi
Fluid requirements, galUS [L]
A, in [mm] B, in [mm] C, in [mm] D, in [mm] Weight,§ lbm [kg]Open Close
Model 70†
18⁄ 10,000 4.97 [18.81]‡6.27 [23.72] 38.28 [972.31] 18.75 [476.25] 64.00 [1625.60] 13.54 [339.85] 16,000 [7530]
HC††
18⁄ 10,000 18.50 [70.02] 14.90 [56.40] 44.00 [1117.60] 18.75 [476.25] 59.00 [1498.60] 12.50 [317.50] 20,600 [9,344]
18⁄ 15,000 25.00 [94.63] 20.00 [75.70] 43.71 [1110.23] 18.75 [476.25] 62.00 [1574.80] 12.50 [371.50] 23,100 [10,478]
HCH4§§
18⁄ 10,000 18.50 [70.02] 14.90 [56.40] 44.00 [1117.60] 18.75 [476.25] 59.00 [1498.60] 11.63 [295.40] 23,200 [10,524]
18⁄ 15,000 25.00 [94.63] 20.00 [75.70] 43.72 [1110.49] 18.75 [476.25] 62.00 [1574.80] 11.63 [295.40] 25,350 [11,499]
EVO-Con‡‡
18⁄, 27 15,000 36.12 [136.71] 28.37 [107.38] 63.06 [1601.7] 18.75 [476.23] 72.00 [1828.8] 13.24 [336.4] 44,902 [20,367]
18⁄, 30 15,000 36.12 [136.71] 28.37 [107.38] 63.06 [1601.7] 18.75 [476.23] 72.00 [1828.8] 13.24 [336.4] 41,815 [18,967]
DWHC
18⁄ 15,000 52.80 [199.85] 42.20 [159.73] 66.78 [1696.21] 18.75 [476.25] 75.25 [1911.35] 24.51 [622.55] 67,000 [30,391]
† Also available in the following sizes and working pressures—13⁄ in 5000 and 10,000 psi; 16⁄ in 10,000 psi.
§ Additional 2.49 galUS [9.43 L] is necessary for secondary unlock.
‡ Except for the EVO-Con, weights shown are for a studded top configuration.
†† Also available in the following sizes and working pressure—13⁄ in 15,000 psi; 21⁄ in 5000 psi.
§§ Also available in the following size and working pressure—16⁄ in 10,000 psi.
‡‡ Dimensions shown include hydrate seal and flanged top design.
Note: Hydrate seal available for all models
DWHC connector Model 70 connectorHC connector
DWHC hub
Load Paths
A load path is the way the applied loads are transmitted through the connector. The more direct the load path, the fewer components it travels through,
yielding a stiffer, more stable connection. In turn, this stiff and stable connection directly affects resistance to hub face separation. All of Cameron collet
connectors have direct load paths which provide high resistance to hub face separation.
Connector Versatility
The DWHC collet connector can be used with the standard wellhead hub, as well as a unique, Cameron-designed dual wellhead hub profile. This DWHC
hub allows other collet connectors to be used in applications where the loading requirements are not as severe. The DWHC collet connector locks onto the
wellhead hub, while the standard HC collet connector or Model 70 lock onto the DWHC hub without any modification to either collet connector.
Model 70 load path
sk-154590-01R
EvoCon
Model 70 connector
load path
HC connector
load path
HCH4 connector
load path
EVO-Con connector
load path
DWHC connector
load path
Hub Interchangeability
DWHC connector
HCH4 connector EVO-Con connector§
Model 70 connectorHC connector
Standard hub
H4 Hub (27 in)
§ The EVO-Con is available with an adapter kit for H4 27-in and 30-in wellheads.
Collet Connector Data—Performance
Performance
Model 70 HC HCH4 EVO-Con
27 in‡
EVO-Con
30 in‡
DWHC
10,000 psi 15,000 psi 10,000 psi 15,000 psi
Pressure rating,
psi [MPa]
10,000 [69.00] 10,000 [69.00] 15,000 [103.40] 10,000 [69.00] 15,000 [103.40] 15,000 [103.40] 15,000 [103.40] 15,000 [103.40]
Bending at 0 pressure,
0 tension,† ft.lbf
3,645,000 4,048,000 5,293,000 2,961,000 3,316,000 5,650,000 8,550,000 11,000,000
Bending at 0 pressure,
0 tension,† N.m
4,942,000 5,488,000 7,176,000 4,014,000 4,516,000 7,660,000 11,592,000 14,914,000
Bending at 10M psi,
0 tension,† ft.lbf
1,706,000 3,219,000 3,308,000 3,045,000 3,975,000 5,800,000 9,040,000 10,100,000
Bending at 10M psi,
0 tension,† N.m
2,313,000 4,364,000 4,485,000 4,128,000 5,389,000 7,864,000 12,257,000 13,694,000
Bending at 10M psi,
2MMlb tension,† ft.lbf
549,000 2,063,000 2,151,000 2,109,000 2,969,000 4,800,000 7,960,000 9,100,000
Bending at 10M psi,
2MMlb tension,† N.m
744,000 2,797,000 2,916,000 2,859,000 4,025,000 6,508,000 10,792,000 12,338,000
Bending at 15M psi,
2MMlb tension,† ft.lbf
– – 1,161,000 – 2,369,000 4,350,000 7,500,000 7,950,000
Bending at 15M psi,
2MMlb tension,† N.m
– – 1,574,000 – 3,212,000 5,898,000 10,169,000 10,779,000
Preload, lbf 245,000 4,385,000 5,910,000 4,740,000 4,337,000 5,513,008 8,922,000 12,050,000
Preload, N 1,090,000 19,505,000 26,289,000 21,085,000 19,292,000 24,523,000 39,687,000 53,601,000
Load shoulder angle
housing [connector]
25° [25°] 25° [25°] 25° [25°] 45° [0°] 45° [0°] 45° [0°] 45° [0°] 25° [10°]
Maximum release angle ≤30° ≤30° ≤30° 4° 4° 4° 4° 4°‡
Water depth rating,
ft [m]
≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048] ≤10,000 [3,048]
Connector style
(hub, collet, etc.)
Collet with hub Collet with hub Collet with hub Collet with hub Collet with hub Collet with hub Collet with hub Collet with hub
Maximum subsea
wellhead OD, in [mm]
31.39 [97.31] 31.39 [797.31] 31.39 [797.31] 27.00 [685.80] 27.00 [685.80] 27.00 [685.80] 30.00 [762.00] 35.25 [895.35]
Maximum connector OD,
in [mm]
64.00 [1,625.60] 59.00 [1,498.60] 62.00 [1,574.80] 59.00 [1,498.60] 62.00 [1,574.80] 72.00 [1,828.80] 72.00 [1,828.80] 75.25 [1,911.35]
Swallow,§ in [mm] 13.38 [339.85] 12.50 [17.50] 12.50 [317.50] 11.63 [295.40] 11.63 [295.40] 11.51 [292.35] 11.51 [292.35] 24.51 [622.55]
Operating pressure,
psi nominal [maximum]
1,500 [3,000] 1,500 [3,000] 1,500 [3,000] 1,500 [3,000] 1,500 [3,000] 1,500
[2,000 max]††
1,500 [3,000] 1,500
[1,500 max]§§
Operating pressure,
MPa nominal [maximum]
10.30 [20.60] 10.30 [20.60] 10.30 [20.60] 10.30 [20.60] 10.30 10.30 [13.70] 10.30 [20.60] 10.30 [20.60]
† Ratings are based on API allowable stresses for normal design loads. Bending capacities listed above are for the connector. The top connection will provide bending capacity limitations.
§ Wellhead datum to bottom of connector. If the hydrate seal is used, the swallow will increase by approximately 2 in [50.8 mm].
‡ The 4° release angle limit applies to initial connector/wellhead lift off of 0 to 1 in [25.4 mm]. For greater than 1 in [25.4 mm] of lift off, the connector can be rotated up to 6° while clearing the wellhead.
†† Exceeding 2,000 psi maximum lock pressure may result in damage of the 27-in wellhead.
§§ Exceeding 1,500 maximum lock pressure may result in damage of the wellhead.
‡‡ Interchange kit available for 27-in and 30-in H4 profiles.
Additional options and capacities are available. Contact your Cameron representative for more information.
