3 1/8'' * 1 1/4'' Drilling equipment oilfield API non-magnetic drill collar

Product Description 3 1/8'' * 1 1/4'' Drilling Equipment oilfield API non-magnetic drill collar  Material Selected The collars are made of AISI 4145H forging or finish rolling alloy structural steel.
Processing and thermal treatment of the pipe hole
The drill collar are trepanned and drifted to API Spec 7. Grinding crafts adopted finish boring technology eliminates regions of the weld stress concentration, making welding appearance more perfect, and increases their life. The full length thermal treatment ensure the mechanical performances fullfil even exceed API Spec 7 requirements. Its brinell hardness ranges from 285 to 341, moreover, charpy “v” notch minimum impact strength of 40 ft-lb at 70℃ are guaranteed one inch below the surface. 
Traceability
From receipt of mill’s certified raw material to the completion of all the processing, in each process of which complete traceablity mechanism workcraft. Serial numbers are die stamped on bar bodies. Routine and strict inspection procedures
All our drill collars are inspected to comply with the API standards. These inspections include fluorescent magnetic-particle detection and inner ultrasonic flaw detection and hardness detection over the entire body of the drill collar as well as other mechanical performance detection.
Cold rolling process
The thread roots, as well as the elevator recess, shall be cold-rolled. Cold rolling creates such a compressive upper radius stress that increases fatigue resistance by minimizing crack initiation.
Phosphate-coated or copper plating
All connections shall undergo phosphate-coated or copper plating process to ensure corrosion resistance, so as to avoid galled thread.
Slip groove, elevator groove and size
Our company offers optional slip and elevate and accepts reprocesses orders,  improving the handling efficiency and guarantee safety. Unless special specification is required, slip and elevator are processed in compliance with API rp 7G guidelines.
Thread protectors
Steel, cast steel, and plastic steel thread protectors for the drill stem products are subject to your requirements. 1.Product Description of non-magnetic drill collar   

Product:	oilfield API non-magnetic drill collar
Size:	3 1/8"-11"
Delivery time:	30 days after receive the deposit.
Standard	API Spec 7-1
Payment Term:	30% advance by T\T; Balance pay against shipping documents or irrevocable LC at sight

  2.Product Specification: 3:Spiral grooving:    4:Elevator and slip recesses:   Elevator and slip recesses can be machined to meet the customer's requirement accronding to API specifications.      4.Our factory       The foreigner  visiting factory
  Packaging & Shipping     testing equipment     Third Party Inspection          FAQ  1.Are you manufacturer or trader company?
We are manufacturer and we could supply more professional technical services and goods.
2.The goods are new or used, if you will make technical drawing and production plans for us?
All our goods are new ones, the production schedule will offer to you once getting your purchase order.
3.Do you have related inspection equipments?
Yes, our factory is equipment all test equipments, and I could send their pictures and test documents to you.
4. Could you tell me if your price includs the third party inspection charges?
No, our price do not include the third party inspection charge, and we will notice on our Quotation.
5. Where did your products sell out?
United States, Canada, Mexico, Venezuela, Colubia, and other South American Region
Russica, Azerbaijan and Central Asia Countires
UAE, Saudi Arabia and Mddle East Counties  

Contact us if you need more details on Api Non-magnetic Drill Collar. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Drill Collar、Api Non-magnetic Drill Collar. If these products fail to match your need, please contact us and we would like to provide relevant information.

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