Spiral Drill Drill Collars
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Spiral Drill Drill Collars
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Features
Basic Infomation
Place of Origin: China
Brand Name: ROSCHEN
Certification: API
Model Number: 9.5inch /8.25inch/8inch/6.5inch/4.75inch
High Light:

Spiral Drill Collars

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Non Magnetic Drill Collars

,

Short nonmagnetic drill collars

Payment & Shipping Terms
Packaging Details: Wooden Box , Bundle
Supply Ability: 20000 sets/m
Specifications
Product Description

 

 

Spiral Drill Drill Collars

 

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%.

 

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

 

 

 

 

 

Short nonmagnetic drill collars (SNMDCs):

SNMDCs are used between a mud motor and a mud collar to neutralize magnetic interference from the following.

 

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.

 

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.

 

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.

 

For more information please contact:

 

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

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Contact Person : Mr. Bill, George, Michael
Tel : 13764195009
Fax : 86-021-54380177
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