Drill Collar

Introduction

l   A hardness range of 25 to 341 BHN and a Charpy impact value of 40 ft-lbs are guaranteed at evenly distributed 16 points in any sections at room temperature;

l   Connections are completed (phosphate coated) to protect them from the elements after machining and help prevent galling upon initial make-up;

l   Thread root are cold rolled on API and H-90 connections;

l   Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections

Non-Magnetic Drill Collar

Introduction

l   Non-magnetic drill collars are made from non-magnetic steel bars with low-strength by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability. It will not interfere with the specialized directional equipment and will enhance the performance of the drilling operation.

l   Non-mag drill collars function as housing or the MWD tools, while at the same time provide the weight for drillstring. Non-mag drill collars are suitable for all types of drilling including straight and directional applications.

l   Each drill collar is fully inspected by internal inspection dept. All data obtained are record the inspection certificate furnished with each drill collar. API monogram, serial number, OD,ID, type and size of connections are stamped on recessed mill flats.

l   We can provide three type of non-magnetic drill collar according to the customers’ order; include slick, spiral, and flex non-mag drill collar.

Introduction

Flex non-mag drill collar is thinner and more flexible than standard drill collar. Their ability to make short radius turns, bend for high build angles, and horizontal applications, manufactured with non-mag steel, this drill collar is well suited for housing MWD equipment.