Product features: It is used in drill string which are one of the most important component to provide drilling bit of pressure and the drill string rigid role. All connections are phosphate-coated or copper plating to improve resistance to galling. Our company offers steel and cast steel and plastic steel thread protectors for its drill stem products.

Material: Drill collars are made from AISI 4145H, 4145H Mod.and Non-mad material.

Standard: API Spec7, API Spec7-1 and SY/T Standard.

Type: Slick drill collar
Spiral drill collar

Hard band: We can supply three type of hard banding, Arnco 100, Arnco 200 and Arnco 300. Also can made according to customers’ requirments.

Output: 600pcs per month.

Size: OD: 3 1/8”~~11”;   ID: 1 1/2”Min.   Length:10’~~31’