8" O. D. X 2 13/16" ID, 6 5/8 Reg, 150 Ppf Spiral Drill Collar: 8 1/4" Outside Diameter X 2 13/16" Inside Diameter, with Slip Recesselevator Recessno Hard Band

• Manufacturing Process: Forging
• Surface Treatment: Sand Blast
• Operation Pressure: Atmospheric Pressure
• Material: Steel
• Warranty: 1 Year
• Application: Oilfield
• Model NO.: 8′′
• Colour: Customer Requirement
• Transport Package: Container
• Specification: various type
• Trademark: UPET
• Origin: China
• HS Code: 8431431000
• Production Capacity: 200000 Sets/Year

Product Description

Quick Details
Condition:New
Warranty:1 YEAR
Applicable Industries:Machinery Repair Shops, Retail, Energy & Mining
Local Service Location:None
Showroom Location:None
Place of Origin:Shandong, China
Type:Non Magnetic Drill Collar
Machine Type:Drilling Tool
Certification:API
Material:High Manganese Steel
Processing Type:Forging
Use:Well Drilling
Size:3 1/8" -11"
Thread protector:Yes
Supply Ability
Supply Ability:500 Piece/Pieces per Month
Packaging & Delivery
Packaging Details:standard export package
wooden box:as your request
Port:Qingdao
Lead Time :

Quantity(Pieces)	1 - 50	>50
Est. Time(days)	30	To be negotiated

Product Description

We supply slick drill collars, spiral drill collars and non-magnetic drill collars; their sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below, we can supply other drill collars at customers' request.
Materials:  
Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finishes are available.  
Rigid Inspection Procedures: 
We inspect all our drill collars to ensure compliance with API SPEC 7-1 standards. These inspections include visual dimensional checks as well as ultrasonic inspections over the entire body of the drill collar.   
Cold Rolling:  
Drill collar thread roots, as well as elevator recess upper radius, are cold-rolled. Cold rolling creates a compressive recess upper radius stress condition that increases fatigue life by minimizing crack initiation.
Phosphate-coated or Copper Plating:  
All connections are phosphate-coated or copper plated to improve resistance to corrosion.     
Slip Groove, Elevator Groove and Size:
Lake offers optional slip and elevator recesses to improve handling efficiency and safety. Unless otherwise specified, slip and elevator recesses are machined in compliance with API spec 7-1 guidelines.   
Thread Protectors: 
Our company offers steel, cast steel and plastic steel thread protectors for its drill stem products.

 

Technical parameter

Nominal size	D		d		L	DF(mm)	Bending Strength
							ratio
	mm	In	mm	in	mm
NC31-41(2-7/8IF)	104.8	37994	50.8	2	9150	100.4	2.43:1
NC35-47	120.7	38050	50.8	2	9150	114.7	2.58:1
NC38-50(3-1/2IF)	127	5	57.2	37260	9150	121	2.38:1
↓	↓	↓	↓	↓	↓	↓	↓
7-5/8REG	241.3	39815	76.2	3	9150/9450	223.8	2.81:1
NC70-97	247.6	39876	76.2	3	9150/9450	232.6	2.57:1
NC70-100	254	10	76.2	3	9150/9450	237.3	2.81:1

Company Information
UPET OILFIELD EQUIPMENTS CO.,LTD is one of the most well-known suppliers for the oilfield equipments in China, was established in 2000, and now has grown up to a star company which is not big but very strong in this field with our persistant effort step by step in the past years.Our products refer to the whole areas of oilfields, from a very small spare part to a very big complete rig system. Our main products are: pump spare parts, mud pumps&packages, DC/AC Motors, solid control equipments, power units, truck-mounted rigs, workover rigs, land rigs, drilling pipes and drilling tools etc. All of our products are manufactured according to the API Standard, and we are authorized to use API monogram.
Our products have been exported to 15 countries& areas around the world, 80% of our exsisting customers have done the business with us by more than 5 times, no one-off customer. We will continue to expand our range, and win more customers' trust with our better and better performance.
We welcome the win-win cooperation relationship with the partners from any places in the world, each customer is our god and helper. Warmly welcome you to come to China and visit us!
With us, you will save money, time, trouble, and most important point is that you can sleep better.