Mayhew Junior threads Drill Rod 

Mayhew Junior Drill rods with 55mm spanner flats at each end and 4mm wall thickness

Introduction:

Mayhew Junior Rods

We manufacture drill rods from seamless tubing and hardened & tempered alloy steel tool joints.

All our tool joints are pre-machined and heat treated before final machining to ensure accuracy.

All threads are gauged to international standards to ensure interchangebility on existing rods irrespective of supplier.

Below is a breakdown of what the most popular drill pipes are and their benefits.  

Mayhew Jr (Junior) drill pipe engineered with weld on joints:

NC26

2-7/8" IF modified drill pipe

2-7/8" FEDP drill pipe

3-1/2" API drill pipe   

2-3/8" Mayhew Jr Drill Pipe 10 foot stick with welded on tool joints - 2" pipe = 2.375" OD

Choose Wall thickness and quantity below.   

Recommendation is to choose Schedule 160 if using a downhole hammer. 

2-3/8" Mayhew Junior Drill Pipe

1-1/2" CA21 weld on tool joint pair (one pin and one box):  (112CA21TJ)

2-3/8" Mayhew Jr weld on tool joint pair (one pin and one box):  (238MHTJ)        

2-3/8" Mayhew Jr bit subs box to box or box to pin  238MHBB or 238MHBP

2-7/8" IF drill pipe with tool joints

2-7/8" 10 foot length schedule 80 modified IF drill pipe:  (278IF)

Drill pipe is designed to allow the introduction of a drilling fluid or air to the bit and to provide the mechanism to transfer energy developed by the drill motor to the bit.  

The correct selection of drill pipe, in most instances, determine how successful you are and what options you have as far as depth, bore hole size, and push and pull down ability.

The selection of drill pipe is one of the most important decisions mainly due to cost and rig capability.