High Torsional Strength Double Shoulder Rotary Connection Oil
Drilling 2-3/8" to 10-1/2" Drill Pipe
ROSCHEN DS CONNECTIONS
Double Shoulder ab. DS
Roschen has engineered, tested and acquired industry approval for
two types of double-shouldered connection.
* The Double Shoulder connection is a generic API double shoulder
connection, which is widely used throughout the industry in
extended reach drilling.
* The MT connection is an enhanced Double Shoulder connection with
additional 25% torsional strength allowing clients to drill the
most challenging wells.
PERFORMANCE:
RS-Double Shoulder connection offers higher strength capability
than API connections in all aspects
- Up to 40% more torsional strength than API through the high
strength secondary make-up shoulder absorbing high frictional load
- Streamlined OD / ID geometry for improved hydraulic performance
or fishing ability without compromising torsional capacity
- DPM-DS pin and box connection made up to a smooth ID transition
to allow smoother fluid flow with minimized turbulence and energy
loss inside the connection. The tendency for mud or cement trap in
crevices are eliminated.
- Fully interchangeable with new or used tool joints and
accessories with API connections
CHARACTERISTICS:
RS-DS connection is available in drill pipe sizes from OD 2-3/8" to
6-5/8". Other sizes are available upon request. The connection is
also available in a wide range of steel grades including sour
service and high strength.
| Connection | OD | ID | Tensile Capacity | Torsional Capacity | Make-Up Torque Maximum |
| in | mm | in | mm | Ibs | daN | ft-Ibs | N-m | ft-Ibs | N-m |
| RS-DS26 | 3-1/2 | 89 | 1-3/4 | 44 | 339,800 | 151,143 | 9,900 | 13,423 | 6,400 | 8,677 |
| RS-DS38 | 5 | 127 | 2-7/16 | 62 | 767,100 | 341,206 | 32,300 | 43,793 | 21,000 | 28,472 |
| RS-DS40 | 5-1/4 | 133 | 2-9/16 | 65 | 907,800 | 403,789 | 39,500 | 53,555 | 25,000 | 33,895 |
| RS-DS46 | 6 | 152 | 3-1/4 | 83 | 976,300 | 434,258 | 47,200 | 63,995 | 30,700 | 41,624 |
| RS-DS50 | 6-5/8 | 168 | 3-1/4 | 83 | 1,374,700 | 611,467 | 77,400 | 104,940 | 50,300 | 68,198 |
| RS-DS55 | 7 | 178 | 4 | 102 | 1,371,300 | 609,954 | 78,500 | 106,432 | 50,300 | 68,198 |
Roschen Inc. is constantly striving to improve its products and
must therefore, reserve the right to change designs, materials,
specifications and price without notice.
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For more information, please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com ; http://www.roschen.net
http://www.roschen.cn ; http://www.roschendrill.com
http://www.roschenmining.com ; http://www.roschendrilling.com
