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Drill Collar for Oil Water Well Drilling API Standard
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Product: Views:163Drill Collar for Oil Water Well Drilling API Standard 
Unit price: Negotiable
Delivery date: Since the payment date Days delivery
Valid until: Long-term effective
Last updated: 2017-12-21 03:34
Drilling process mainly from the following aspects of the role
(1) apply a drill bit to the drill bit;
(2) to ensure the necessary strength under compression conditions;
(3) to reduce the drill bit vibration, swing, and beating, so that the drill work smoothly;
(4) control wells oblique.

Descriptions of oil drill collar:  

1) Standard: API 7-1
2) Size: 3 1/8"--11"
3) Length: 10'--31'
4) Material: AISI 4145H,AISI4145H mod, Mon-mag material  


A drill collar is a device used in the drilling of oil wells for weighting the drill bit, enabling it to drill through rock. It is a bar made of solid steel, either plain carbon steel or a non-magnetic steel alloy, drilled lengthwise to permit the passage of drilling fluids. A drill collar forms the lowest element of a drill string, which encompasses all the elements of a down-hole process from the surface to the rock bit.

 Our company
Beijing superior Drilling Equipment Co., Itd is a comprehensive enterprise set PDC bits, tricone bits production sales. The company was founded in 1989, covers an area of 27 acres, is located in the vast expanse of Hebei Plain, is located in the central area of the major oil fields, unique geographical location, has a strong design, development and production capacity.


Contact me: Yilia
Sitio web: http://superiorbit.com/