dsfdsfdsf Drill Collar-Xi'an Landrill Oil Tools Co.,Ltd



Drill Collar is one of the most important components of the drill string, which providing pressure on drill bits. 

The production and inspection standard is API 7, API 7-1. The material of the drill collar can be AISI 4145 H or Non-magnetic material.
Landrill provide you all kinds of drill collars like Slick drill collars and Spiral drill collars, OD sizes from 3 1/8”-11”, Length from 10’-31’

drill collar, drill string, drilling,oilfield,forging

Mechanical Property of Slick and Spiral drill collars:
OD Range (in) Yield Strength (MPa) Tensile Strengt h (MPa) Elongation (%) Hardness (HB) Impact Test (J)
3 1/8 ~6 3/4
Mechanical Property of Non-mag Drill Collars:
OD Range (in) Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%) Hardness (HB) Impact Test (J)
3 1/8 ~ 6 3/4
7 ~ 11



Other drilling string products: 

PDC Drill bits Stabilizer Rotary Reamer
Mud Motor Drill Collar Heavy Weight Drill Pipe
Hole Opener Drilling jar Jar Intensifier
Shock Absorber Slide Reamer Variable Gauge Stabilizer

Copyright(c)Xi'an Landrill Oil Tools Co.,Ltd
Address:2-60402 Greenwich Business Suite, Jinye 2nd Road,
Hi-tech Development Zone, Xi'an China