Specifications

1,non-magnetic drill collar According to API Spec.7 and SY/T5144
2,made of low carbon stainless steel
3,good low magnetic cond

Non-magnetic drill collar

 

1) All our products accord with API SPEC 7 standard, and we get the right to use the API 7 LOGO.
2) Size: from 3 1/8" ~ 11" available
3) Grade: DNM 110
4) Cargo Readiness: Normally 3 months after deposit

 

 

Materials of the Non-magnetic drill collar are from chrome manganese, low carbon obtained by combining a proprietary chemical analysis and a rotary hammer process. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling.

Magnetic permeability (when MPS=1105/4Nm) relative max μr:1.010.

Magnetic field gradient (hot spots) max: B 0.05micro tesla/100mm.

 

 

Mechanical Property
OD		Yield strength ?.2	Tensile strength	Elongation4(%)
mm	in
79.4--171.4	3 1/8--6 3/4	≥758	≥827	≥18
177.8--279.4	7--11	≥689	≥758	≥20