- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
Roschen Global
 |
| Quantity: | |
|---|---|
Spiral Drill Collars 8inch 8.25inch 9.5inch
ROSCHEN
ROS-DC-SDC 8,8.25,9.5...
Product Description
Spiral Drill Collars 8inch 8.25inch 9.5inch
Drill Collars in Drilling Application
Drill collars play a vital role in drilling process. Due to the structural features, drill collars can provide weight for drilling purpose, which is drill collar’s one and foremost specialty. Gravity works on a number of drill collars to offer enough downward force needed to break rocks with the drill bit.
Apart from providing weight on the bit (WOB), drill collars also work as a shock absorber to dampen the vibration and shaking when drilling takes place. In this way, the drilling process can be carried out in a much steadier state.
Thirdly, the presence of the drill collars allows the pipelines to stay in the tensile state, while guarantees the rigidity of the drill string under great compression. Thus, the drill efficiency and quality are greatly improved.
In addition to the above applications, drill collars can help to control the direction of the bottom hole assembly, avoiding the problem of hole deviation and enhancing the performance of drilling.
Drill collar Connections
All connections are precision-machined to API Spec 7-2 requirements. API relief groove pin and bore back box stress relief are available on request. Thread roots are cold-worked to offer a greater resistance to fatigue. At Command Tubular all connections are phosphate coated to minimize galling during makeup and thread storage compound is applied. Thread protectors are installed to ensure adequate joint protection during shipment.
InterDril Spiral Well Test Drill Collar 4.750” x 45.00 lb/ft PH 6 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 4 3/4"(4.75") | Connection | PH6 | Bend Stress Ratio | |
Nominal ID | 2.25" | OD | 4 3/4"(4.75") | ID | 2.563" |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 45.1 lb/ft | Average Length | 31.00 ft |
Nominal wall weight | 45.00# | Tensile Strength | 362,000lbs | Torsional Strength | |
Nominal wall thickness | Minimum Make Up Torque | 6500 Ib/ft | Maximum Make Up Torque | 8800 lb/ft | |
Drift Size | 2.125" | Fluid Displacement | Fluid capacity | ||
IPC | None | Slip Recess | Special | Elevator Recess | Special |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 1398lbs（635kgs） | ||||
Manufacturing Criteria | API Spec7-1 | ||||
InterDril Spiral Drill Collar 4.750” x 45.00 lb/ft WT38 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 4 3/4"(4.75") | Connection | WT38 | Bend Stress Ratio | 1.42 |
Nominal ID | 2.25" | OD | 4 3/4"(4.75") | ID | 2.563" |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 45.1 lb/ft | Average Length | 31.00 ft |
Nominal wall weight | 45.00# | Tensile Strength | 846,000lbs | Torsional Strength | 32000 |
Nominal wall thickness | Minimum Make Up Torque | 9000 Ib/ft | Maximum Make Up Torque | ||
Drift Size | 2.125" | Fluid Displacement | Fluid capacity | ||
IPC | None | Inspection Criteria | NS-2 | ||
Pin Length | n/a | ||||
Box Length | n/a | ||||
Average weight per joint | 1398lbs（635kgs） | ||||
Manufacturing Criteria | API Spec7-1 | ||||
InterDril Spiral Drill Collar 4.750” 45.00 lb/ft NC38 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 4 3/4"(4.75") | Connection | NC38 | Bend Stress Ratio | 1.42 |
Nominal ID | 2.25" | OD | 4 3/4"(4.75") | ID | 2.563" |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 45.1 lb/ft | Average Length | 31.00 ft |
Nominal wall weight | 45.00# | Tensile Strength | 725,000lbs | Torsional Strength | 32000 |
Nominal wall thickness | Minimum Make Up Torque | 8790Ib/ft | Maximum Make Up Torque | ||
Drift Size | 2.125" | Slip Recess | Yes | Elevator Recess | Yes |
IPC | None | Fluid Displacement | 0.815 Gal/ft | Fluid capacity | |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 1398lbs （635kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 13.744 | ||||
Cross Section Area OD(in²） | 17.721 | ||||
Cross Section Area ID(in²） | 3.976 | ||||
Section Modulus(in³） | 11.769 | ||||
Polar Section Modulus(in³) | 19.984 | ||||
JSH Spiral Drill Collar 4.750” x 49.79 lb/ft NC38 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 4 3/4"(4.75") | Connection | NC38 | Bend Stress Ratio | 2.217 |
Nominal ID | 2 1/4"(2.25") | OD | 4 3/4"(4.75") | ID | 2.25" |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 49.79 lb/ft | Average Length | 31.00 ft |
Nominal wall weight | Tensile Strength | 625,000lbs | Torsional Strength | 17500 | |
Nominal wall thickness | Minimum Make Up Torque | 8790Ib/ft | Maximum Make Up Torque | 11000 | |
Drift Size | 2.125" | Slip Recess | Yes | Elevator Recess | No |
IPC | None | Fluid Displacement | Fluid capacity | ||
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 1543lbs （700kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 13.744 | ||||
Cross Section Area OD(in²） | 17.721 | ||||
Cross Section Area ID(in²） | 3.976 | ||||
Section Modulus(in³） | 9.992 | ||||
Polar Section Modulus(in³) | 19.984 | ||||
InterDril Spiral Drill Collar 6.500” x 87.35 lb/ft NC50 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 6 1/2"(6.5") | Connection | NC50 | Bend Stress Ratio | 2.03 |
Nominal ID | 2 13/16"(2.8125") | OD | 6 1/2"(6.5") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 87.35 lb/ft | Average Length | 31.00 ft |
Nominal weight | 87.00# | Tensile Strength | 1392400lbs | Torsional Strength | 52000 |
Nominal wall thickness | 1.844" | Minimum Make Up Torque | 29700Ib/ft | Maximum Make Up Torque | 32000 lb/ft |
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | No |
IPC | None | Fluid Displacement | 1.33Gal/ft | Fluid capacity | 0.32 Gal/ft |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 1543lbs （700kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 26.97 | ||||
Cross Section Area OD(in²） | 33.183 | ||||
Cross Section Area ID(in²） | 6.213 | ||||
Section Modulus(in³） | 26.016 | ||||
Polar Section Modulus(in³) | 52.032 | ||||
JSH Spiral Drill Collar 6.500” x 87.35 lb/ft NC50 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 6 1/2"(6.5") | Connection | NC50 | Bend Stress Ratio | 2.242 |
Nominal ID | 2 13/16"(2.8125") | OD | 6 1/2"(6.5") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 87.35 lb/ft | Average Length | 31.00 ft |
Nominal weight | 86.79# | Tensile Strength | 1259311lbs | Torsional Strength | 51823 |
Nominal wall thickness | 1.844" | Minimum Make Up Torque | 29445Ib/ft | Maximum Make Up Torque | 32389 lb/ft |
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | No |
IPC | None | Fluid Displacement | 1.33Gal/ft | Fluid capacity | 0.32 Gal/ft |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 2708lbs （1231kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 26.97 | ||||
Cross Section Area OD(in²） | 33.183 | ||||
Cross Section Area ID(in²） | 6.213 | ||||
Section Modulus(in³） | 26.016 | ||||
Polar Section Modulus(in³) | 52.032 | ||||
VAM Drilling Spiral Drill Collar 6.500” x 87.35 lb/ft NC50 Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 6 1/2"(6.5") | Connection | NC50 | Bend Stress Ratio | 2.03 |
Nominal ID | 2 13/16"(2.8125") | OD | 6 1/2"(6.5") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 87.35 lb/ft | Average Length | 31.00 ft |
Nominal weight | 87.00# | Tensile Strength | 1392400lbs | Torsional Strength | 52500 |
Nominal wall thickness | 1.844" | Minimum Make Up Torque | 29700Ib/ft | Maximum Make Up Torque | 32000 lb/ft |
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | Yes |
IPC | None | Fluid Displacement | 1.33Gal/ft | Fluid capacity | 0.32 Gal/ft |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 2708lbs （1231kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 26.97 | ||||
Cross Section Area OD(in²） | 33.183 | ||||
Cross Section Area ID(in²） | 6.213 | ||||
Section Modulus(in³） | 26.016 | ||||
Polar Section Modulus(in³) | 52.032 | ||||
JSH Spiral Drill Collar 8.000” x 120.00 lb/ft 6 5/8 ” REG Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 8"(8") | Connection | 6 5/8" API Regular | Bend Stress Ratio | 2.6 |
Nominal ID | 2 13/16"(2.8125") | OD | 8"(8") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 122.38 lb/ft | Average Length | 31.00 ft |
Nominal weight | 120# | Tensile Strength | 1683400lbs | Torsional Strength | 78700 |
Nominal wall thickness | Minimum Make Up Torque | 49200Ib/ft | Maximum Make Up Torque | 54100 lb/ft | |
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | No |
IPC | None | Fluid Displacement | Fluid capacity | ||
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 3793lbs （1720kgs） | ||||
Manufacturing Criteria | API Spec7/NS-1 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 44.053 | ||||
Cross Section Area OD(in²） | 50.265 | ||||
Cross Section Area ID(in²） | 6.213 | ||||
Section Modulus(in³） | 49.498 | ||||
Polar Section Modulus(in³) | 98.995 | ||||
Subdrill Spiral Drill Collar 8.000” x 144.00 lb/ft 6 5/8 ” REG Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 8"(8") | Connection | 6 5/8" API Regular | Bend Stress Ratio | 2.3 |
Nominal ID | 2 13/16"(2.8125") | OD | 8"(8") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 144 lb/ft | Average Length | 31.00 ft |
Nominal weight | 144# | Tensile Strength | 1834500lbs | Torsional Strength | 85500 lb/ft |
Nominal wall thickness | Recommended Make Up Torque | 8790 Ib/ft | Maximum Make Up Torque | ||
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | Yes |
IPC | None | Fluid Displacement | Fluid capacity | ||
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 4464lbs （2029kgs） | ||||
Manufacturing Criteria | API Spec7 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | |||||
Cross Section Area OD(in²） | |||||
Cross Section Area ID(in²） | |||||
Section Modulus(in³） | |||||
Polar Section Modulus(in³) | |||||
VAM Drilling Spiral Drill Collar 8.000” x 144.00 lb/ft 6 5/8” REG Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 8"(8") | Connection | 6 5/8" API Regular | Bend Stress Ratio | 2.3 |
Nominal ID | 2 13/16"(2.8125") | OD | 8"(8") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 149.6 lb/ft | Average Length | 31.00 ft |
Nominal weight | 144# | Tensile Strength | 1834500 lbs | Torsional Strength | 85500 lb/ft |
Nominal wall thickness | Recommended Make Up Torque | 53300 Ib/ft | Maximum Make Up Torque | ||
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | Yes |
IPC | None | Fluid Displacement | Fluid capacity | ||
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 4638 lbs （2029kgs） | ||||
Manufacturing Criteria | API Spec7 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | |||||
Cross Section Area OD(in²） | |||||
Cross Section Area ID(in²） | |||||
Section Modulus(in³） | 49.498 | ||||
Polar Section Modulus(in³) | |||||
JSH Spiral Drill Collar 8.250” x 130.50 lb/ft JSH 6 5/8” REG Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 8 1/4"(8.25") | Connection | 6 5/8" API Regular | Bend Stress Ratio | 3.211 |
Nominal ID | 2 13/16"(2.8125") | OD | 8 1/4"(8.25") | ID | 2 13/16" (2.8125") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 130.5 lb/ft | Average Length | 31.00 ft |
Nominal weight | Tensile Strength | 1683400 lbs | Torsional Strength | 78700 lb/ft | |
Nominal wall thickness | Recommended Make Up Torque | 53300 Ib/ft | Maximum Make Up Torque | 55630 | |
Drift Size | 2 11/16"(2.6875") | Slip Recess | Yes | Elevator Recess | No |
IPC | None | Fluid Displacement | 2.32 US Gal/ft closed end | Fluid capacity | 0.32 |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 4045 lbs （1834kgs） | ||||
Manufacturing Criteria | API Spec7 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 47.244 | ||||
Cross Section Area OD(in²） | 53.456 | ||||
Cross Section Area ID(in²） | 6.213 | ||||
Section Modulus(in³） | 54.382 | ||||
Polar Section Modulus(in³) | 54.382 | ||||
JSH Spiral Drill Collar 9.500” x 160.82 lb/ft 7 5/8” REG Range 2
Specification | Tool Joint/Connection Specifications | ||||
Nominal OD | 9 1/2"(8.5") | Connection | 7 5/8" API Regular | Bend Stress Ratio | 3.061 |
Nominal ID | 3"(3") | OD | 9 1/2"(9.5") | ID | 3" (3") |
Steel Grade | AISI 4145H Modified | Adjusted Weight | 160.82 lb/ft | Average Length | 31.00 ft |
Nominal weight | Tensile Strength | 2459,066 lbs | Torsional Strength | 132036 lb/ft | |
Nominal wall thickness | 3.250" | Recommended Make Up Torque | 53300 Ib/ft | Maximum Make Up Torque | 90775 |
Drift Size | 2.875" | Slip Recess | Yes | Elevator Recess | Yes |
IPC | None | Fluid Displacement | 2.86 US Gal/ft closed end | Fluid capacity | 0.37 |
Pin Length | n/a | Inspection Criteria | NS-2 | ||
Box Length | n/a | ||||
Average weight per joint | 4985lbs （2261kgs） | ||||
Manufacturing Criteria | API Spec7 | ||||
Drill Collar Capacities | |||||
Cross Section Area Body(in²） | 63.814 | ||||
Cross Section Area OD(in²） | 70.882 | ||||
Cross Section Area ID(in²） | 7.069 | ||||
Section Modulus(in³） | 83.336 | ||||
Polar Section Modulus(in³) | 166.671 | ||||
Spiral Drill Collars
The spiral cut is added to a drill collar to prevent the likelihood of differential wall-sticking by reducing wall contact between the drill collar and the wall of the hole. The spiralling starts 22” from the bottom of the slip recess or 79” from the box end and ends 30” from the pin end. Adding spiralling to drill collars reduces the weight by approximately 4%.
Non-Magnetic Drill Collars
Command Tubular’s non-magnetic drill collars are an integral heavy duty joint that are constructed from a solid bar of austenitic stainless steel. Our non-magnetic drill collars are supplied with a machined surface finish condition.
All non-magnetic collars are hot/cold worked in order to provide them with the necessary mechanical properties. The bars are then trepanned, hot spot inspected and machined. An internal bore treatment is performed on the full length in order to achieve the proper compressive status of the internal diameter.
This provides the collar with optimal resistance to stress corrosion cracking. All of our drill collars are manufactured in accordance with API spec 7, Q1 and recommended practice 7G as applicable.
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
