Spiral Drill Drill Collars

 

 

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