Cameron Collet Connector
Cameron Collet Connector
Cameron Collet Connector
As drilling depths have increased over the years, Cameron collet connectors have evolved to address issues concerning higher internal and external pressures, ever-increasing applied bending and tension loads, and extreme operating conditions. Additionally, Cameron collet connectors are designed to fulfill a variety of requirements caused by restricted space, high preload and fatigue life, as well as customer requirements for unique operating environments. Cameron Model 70, HC, HCH4 and DWHC Collet Connectors are typically used for connection of the BOP stack to the wellhead, and to secure the lower riser assembly to the top of the BOP. While these collet connectors utilize the same basic design, their preload and structural load capabilities vary.
All Cameron collet connectors have the following features: High strength and stiffness with a direct load path through the connector. Metal-to-metal sealing AX gaskets on the collet end ensure seal integrity. A new version of the AX gasket with a contingency seal may be used with the DWHC. Positively driven-open collet segments during unlock ensure that no overpull is required to disconnect. A secondary unlock function is also included in the design. Inconel inlays on all sealing surfaces exposed to seawater. Available with studded, flanged or clamped tops. Available with secondary unlock pistons. Inherent self-locking characteristics.
SD24752
HC Collet Connector
HC Collet Connector
The HC Collet Connector is similar to the popular Model 70, but is designed to provide greater preload to withstand higher separating forces. Features include: Short swallow up, tapered hub profile and positive unlocking system allow disconnection at angles up to 30. Shortest swallow up of any major wellhead connector available on the market.
SD24754
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 greater annular piston area for larger locking and unlocking force. Compact design minimizes height and weight.
SD24755
Hub Interchangeability
In addition to the standard wellhead hub, Cameron has designed a unique dual hub wellhead profile to use with the DWHC Connector. This DWHC hub allows other collet connectors to be used in applications where the loading requirements are not as severe. While the standard HC Collet Connector and the Model 70 Collet Connector locks onto the DWHC hub, the DWHC Collet Connector locks onto the standard wellhead hub. No modification to either collet connector is required. Camerons newest collet connector, the HCH4, was designed specifically to fit on a mandrel-style hub.
SD017194
DWHC
HC
Model 70
SD24780
DWHC Hub
DWHC
HC
Model 70
SD24781
Standard Hub 4
SD24782
SD24783
SD24784
SD24785
When selecting a collet connector, factors regarding preload and structural load should be taken into consideration. For instance, the Model 70 is for applications requiring up to 245,000 lb preload. For applications requiring a higher preload of up to 5.875 million lb, the Model HC is available. Both the Model 70 and HC connectors utilize the same structural capacities therefore, preload is the determining factor when choosing between the two. Cameron offers the HCH4, an HC equivalent, to fit on a mandrel-style wellhead. When even higher preload and structural load capacity is called for, the DWHC is the collet connector of choice. Cameron Collet Connector Data Typical Ratings, Normal Operating Conditions/Stresses*
Performance
Pressure Rating (psi/MPa) Bending @ 0 pressure, 0 tension* (ft-lb) Bending @ 0 pressure, 0 tension* (Nm) Bending @ 10,000 psi, 0 tension* (ft-lb) Bending @ 10,000 psi, 0 tension* (Nm) Bending @ 10,000 psi, 2,000,000 lb tension*(ft-lb) Bending @ 10,000 psi, 2,000,000 lb tension*(Nm) Bending @ 15,000 psi, 2,000,000 lb tension* (ft-lb) Bending @ 15,000 psi, 2,000,000 lb tension*(Nm) Preload (lb) Preload (N) Load Shoulder Angle (housing/connector) Maximum Release Angle Water Depth Rating (feet/meters) Connector Style (hub, collet, etc.) Maximum Subsea Wellhead OD (in/mm) Maximum Connector OD (in/mm) Swallow** (in/mm) Weight (studded top) (lb/kg) Operating Pressure (psi/psi) Operating Pressure (MPa/MPa) Hydraulic Volume Required (Open) (gal/liters) Hydraulic Volume Required (Closed) (gal/liters) Interchange Kit for Standard Connector
* ** *** ****
Model 70
10,000/69.00 3,645,000 4,942,000 1,706,000 2,313,000 549,000 744,000 245,000 1,090,000 25/25 10,000/69.00 4,048,000 5,488,000 3,219,000 4,364,000 2,063,000 2,797,000 4,385,000 19,505,000 25/25
HC
15,000/103.50 5,293,000 7,176,000 3,308,000 4,485,000 2,151,000 2,916,000 1,161,000 1,574,000 5,875,000 26,133,000 25/25
DWHC
15,000/103.50 11,500,000 15,591,000 11,750,000 15,930,000 10,300,000 13,964,000 9,300,000 12,609,000 12,000,000 53,379,000 25/10 4**** 10,000/69.00 2,961,000 4,014,000 3,045,000 4,128,000 2,109,000 2,859,000 4,740,000 21,085,000 45/0 4
HCH4
15,000/103.50 1,868,000 2,533,000 2,631,000 3,567,000 1,850,000 2,508,000 1,145,000 1,552,000 8,352,000 37,152,000 45/0 4 Collet with Hub 27.00/685.80 62.00/1574.80 14.63/371.60 25,350/11,499 1500 10.30 25.00/94.63 20.00/75.70 Not required
30
Collet with Hub 31.39/797.31 64.00/1625.60 13.38/339.85 16,600/7530 1500/3000 10.30/20.60 4.97/18.81*** 4.18/15.82 Not required
30
Collet with Hub 31.39/797.31 59.00/1498.60 12.50/317.50 20,600/9344 1500/3000 10.30/20.60 18.50/70.02 14.90/56.40 Not required
10,000/3048
Collet with Hub 31.39/797.31 62.00/1574.80 12.50/317.50 23,100/10,478 1500/3000 10.30/20.60 25.00/94.63 20.00/75.70 Not required
30
10,000/3048
Collet with Hub 35.25/895.35 75.25/1911.35 24.51/622.55 67,000/30,391 1500/3000 20.60 52.80/199.85 42.20/159.73 Not required
Collet with Hub 27.00/685.80 59.00/1498.60 11.63/295.40 23,200/10,524 1500/3000 20.60 18.50/70.02 14.90/56.40 Not required
Ratings are based on API allowable stresses for normal design loads. Top of wellhead to bottom of connector. If the Hydrate seal is used, the swallow will increase by approximately 2(50.8mm). Additional 2.49 gallons (9.43 liters) is necessary for secondary unlock. The 4 release angle limit applies to initial connector/wellhead lift off of zero to 1 (25.4mm). For greater than 1 (25.4mm) of lift off, the connector can be rotated up to 6 while clearing the wellhead.
F = 1,517,112 lb = 1.88 Working Pressure = 15,000 psi DWHC Max Top Tension = 2,000,000 lb FY, Top (lb) M, Top (ft-lb)
10 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 20
10 8 6 4 2 0 0 2 4 Model HC 6 8 10 12 14 DWHC 16 18
A D
Model 70
SD24786
A D
HC
SD24787
C B C B A A D D
HCH4
SD24788
DWHC
SD24789
B
(in/mm)
C
(in/mm)
D
(in/mm)
Weight
(lb/Kg)
38.28/ 972.31
18.75 / 476.25
64.00/ 1625.60
13.38/ 339.85
16,600/7530
*Also available in the following sizes and working pressures: 13-5/8 5000, 10,000 and 15,000 psi; 16-3/4 5000 and 10,000 psi; 20-3/4 2000 and 3000 psi; 21-1/4 2000 , 5000 and 10,000 psi.
HC Collet Connector
Bore Size 18-3/4 18-3/4 Working Pressure* 10,000 psi 15,000 psi Operating Pressure
(psi/MPa)
Preload
(lb/MPa)
Fluid Requirements
(gal/liters)
No Secondary Unlock A B
Secondary Unlock B C
Weight D
(lb/Kg)
3000/20.68 3000/20.68
2,821,000/19,448 5,875,000/40,502
Open Closed (in/mm) (in/mm) (in/mm) (in/mm) (in/mm) (in/mm) 18.50/70.02 14.90/56.40 18.75/476.25 44.00/1117.60 18.75/476.25 59.00/1498.60 12.50/317.50 20,600/9,344 25.00/94.63 20.00/75.70 35.41/899.41 18.75/476.25 43.71/1110.23 18.75/476.25 62.00/1574.80 12.50/317.50 23,100/10,478
*Also available in the following sizes and working pressures: 13-5/8 15,000 psi, 21-1/4 5000 psi
C
(in/mm)
D
(in/mm)
Weight
(lb/Kg)
23,200/10,524 25,350/11,499
*At 3000 psi (20.68 MPa) operating pressure, preload is 6,140,000 lb (42,329 MPa)
B
(in/mm)
C
(in/mm)
D
(in/mm)
Weight
(lb/Kg)
66.78/ 1696.21
18.75/ 476.25
75.25/ 1911.35
24.51/ 622.55
67,000/30,391
Western Hemisphere Cameron PO Box 1212 Houston Texas 77251-1212 Tel 713 939 2211 Fax 713 939 2620 http://www.camerondiv.com
Eastern Hemisphere Cooper Cameron (U.K.) Ltd. 5 Mondial Way Harlington Hayes UB3 5AR Tel 44 181 9901800 Fax 44 181 9901888 http://www.camerondiv.com
Asia Pacific/Middle East Cooper Cameron (Singapore) Pte. Ltd. No. 2 Gul Circle, Jurong Industrial Est Locked Bag Service No. 3 Jurong Town Post Office Singapore 629560 Republic Of Singapore Tel 65 8613355 Fax 65 8616197 http://www.camerondiv.com
Cooper Cameron Corporation, Cameron Division, Printed in USA, 6/99, TG/5M, WR6585/TC1272