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Non-Magnetic Slick Drill Collars 8.25inch 9.5inch

Drill collars are extremely heavy-duty industrial tubular used to drill into the ground and are used in conjunction with drill pipe. While drill pipe makes up the majority length of a drill string, drill collars make up only a small amount.
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Product Description


Non-Magnetic Slick Drill Collars 8.25inch 9.5inch

About Drill Collars

 

Drill collars are extremely heavy-duty industrial tubular used to drill into the ground and are used in conjunction with drill pipe. While drill pipe makes up the majority length of a drill string, drill collars make up only a small amount.

 

For example: a 10,000ft drill string may be comprised of 9,000ft of drill pipe, and only 500ft of drill collars. Much like drill pipe, drill collars are made in 31ft lengths and are screwed together vertically on the drilling rig. In contrast, to drill pipe, drill collars are thick-walled and heavy, with very limited flexibility. Drill collars are used at the bottom of the drill string, just above the drill bit. They are used mainly for weight on the drill bit but also work as a shock absorber to dampen the vibrations and impact forces caused by drilling.

 

There are two main types of drill collars, slick or spiral grooved, however, both styles accomplish the same task. Spiral groove drill collars were introduced in more recent years and are thought to help prevent the drill string from getting stuck in the hole by allowing drilling debris and lubricant to pass more freely around the drill collar.

Non-Magnetic Slick Drill Collar 4.750” NC38

Specification


Tool   Joint/Connection Specifications

Nominal OD

4   3/4"(4.75")

Connection

NC38

Bend Stress   Ratio


Nominal ID

2   11/16"(2.6875")

OD

4 3/4"   (4.75")

ID

2   11/16"(2.6875")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength

587300lbs

Torsional   Strength

18100 lb/ft

Magnetic   Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

2   9/16"(2.5625")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

18%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

120,00 psi   Minimum

827 Mpa

Yield Strength

110,00 psi   Minimum

758 Mpa

Impact Strength

Above 60J lb/ft   charpy V notch

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Slick Drill Collar 6.750” NC50

 

Specification


Tool   Joint/Connection Specifications

Nominal OD

6   3/4"(6.75")

Connection

NC50

Bend Stress   Ratio


Nominal ID

3   1/4"(3.25")

OD

6 3/4"   (6.75")

ID

3   1/4"(3.25")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic   Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

3   1/8"(3.125")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

18%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

120,00 psi   Minimum

827 Mpa

Yield Strength

110,00 psi   Minimum

758 Mpa

Impact Strength

Above 60J lb/ft   charpy V notch

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Drill Collar 8.000” x 6 5/8” REG Drill Collar

Specification


Tool   Joint/Connection Specifications

Nominal OD

8"(8")

Connection

 6 5/8 REG

Bend Stress   Ratio


Nominal ID

2   13/16"(2.8125")

OD

8"(8")

ID

2   13/16"(2.8125")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

3   11/16"(3.6875")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

20%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

110,00 psi   Minimum

758 Mpa

Yield Strength

100,00 psi   Minimum

689 Mpa

Impact Strength

Above 60J lb/ft

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Drill Collar 8.250” x 6 5/8” REG

Specification


Tool   Joint/Connection Specifications

Nominal OD

8 1/4"   (8.25")

Connection

 6 5/8 REG

Bend Stress   Ratio


Nominal ID

3 1/2"(3.5")

OD

8   1/4"(8.25")

ID

3   1/4"(3.25")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic   Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

3   3/8"(3.325")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

20%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

110,00 psi   Minimum

758 Mpa

Yield Strength

100,00 psi   Minimum

689 Mpa

Impact Strength

Above 60J lb/ft

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Drill Collar 9.500” x 7 5/8” REG

Specification


Tool   Joint/Connection Specifications

Nominal OD

9 1/2"   9.5")

Connection

 7 5/8 REG

Bend Stress   Ratio


Nominal ID

3   "(3")

OD

9   1/2"(9.5")

ID

3   "(3")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic   Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

2   7/8"(2.875")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

20%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

110,00 psi Minimum

758 Mpa

Yield Strength

100,00 psi   Minimum

689 Mpa

Impact Strength

Above 60J lb/ft

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Drill Collar 9.500” x 7 5/8” REG

Specification


Tool   Joint/Connection Specifications

Nominal OD

9 1/2"   9.5")

Connection

 7 5/8 REG

Bend Stress   Ratio


Nominal ID

3 1/32   "(3.031")

OD

9   1/2"(9.5")

ID

3 1/32   "(3.031")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

2   29/32"(2.9063")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

20%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

110,00 psi   Minimum

758 Mpa

Yield Strength

100,00 psi   Minimum

689 Mpa

Impact Strength

Above 60J lb/ft

Hardness(Brinell)

Minimum 285 BHN

 

Non-Magnetic Drill Collar 9.500” x 7 5/8” REG

Specification


Tool   Joint/Connection Specifications

Nominal OD

9 1/2"   9.5")

Connection

 7 5/8 REG

Bend Stress   Ratio


Nominal ID

4   "(4")

OD

9   1/2"(9.5")

ID

4   "(4")

Material Grade

P530

Adjusted Weight


Average Length

31.00 ft

Grain Size

ASTM

Tensile Strength


Torsional   Strength


Magnetic   Permeability

1.001max

Recommended Make   Up Torque


Maximum Make Up   Torque


Drift Size

3 3/8"(3.325")

Slip Recess

N/A

Elevator Recess

N/A

Hardbanding

None

Fluid   Displacement


Fluid capacity


IPC

None


Inspection   Criteria

NS-2

Elongation

20%

Chemical   Properties

Phosphorus   <0.05%


Sulphur   <0.03%

Average Weight   Per Joint


Manufacturing   Criteria

API Spec7-1

Drill Collar   Capacities

Tensile Strength

110,00 psi   Minimum

758 Mpa

Yield Strength

100,00 psi   Minimum

689 Mpa

Impact Strength

Above 60J lb/ft

Hardness(Brinell)

Minimum 285 BHN

 

Drill Collars

 

Stabil Drill’s high-performance drill collars add mechanical integrity and weight to the bit, helping you run with superior strength.

 

Made by machining solid bars of steel, drill collars are thick-wall tubulars that help break up the rock below by adding weight to the lower end of the assembly. Available in a variety of designs and specifications, all of our drill collars are composed of AISI 4145-modified alloy steel, heat-treated to meet API standards.

 

Each of our drill collar’s connections is cut in-house using constant profile cutting tools and applying standard API relief features—cold rolled and electroplated. Meticulous product inspections are applied at every step to ensure zero surprises.

 

ROSCHEN Supply Group offers new drill collars. Drill collars comprise about one-third of all product sales for ROSCHEN Supply Group. The new drill collars we provide come from only reputable steel manufacturers and are made to outperform all industry requirements.

 

In their initial phase of manufacturing, drill collars are solid round bars of 4145 carbon steel. The bars are then quenched and tempered in a heat treatment process to attain the required metallic properties and hardness for drilling. Once heat treatment is complete, a hole is machined through the bar in a coring/honing process known as trepanning. This hole is better known as the ID or the inner diameter. After the trepanning is complete, the ends are machine threaded which makes the connections. 


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



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