Mayhew Junior Drill Rod

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.

Product Details

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.

Mayhew Junior Drill Pipe

Mayhew Junior Drill Pipe


Mayhew Junior Drill Rod

Mayhew Junior Drill Rod


Mayhew Junior Rods

Mayhew Junior Rods



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.  

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


Mayhew Junior Rods Specifications
DescriptionPipe ODPipe WallConnection ODConnection IDLength(ft)
2-3/8 IF Flush3 1/20.3753 1/21 3/420
2-3/8 IF2 3/8.280/2543 1/21 3/410, 15, 20
2-3/8 FEDP2 3/8.280/2543 1/81 1/210, 15, 20
2-3/8 Mayhew Jr2 3/8.280/25431 1/210, 15, 20
2-3/8 Mayhew Jr2 3/80.192 3/41 1/25, 10
2-7/8 Mayhew Jr Pipe Flush2 7/80.3622 7/81 1/210, 15, 20
Mayhew Reg. Flush3 1/20.3753 1/21 1/220
Mayhew Reg.2 3/8.280/2543 1/2 or 3 1/41 1/210, 15, 20
2-7/8 IF4 1/20.3374 1/82 1/210, 15, 20
3-1/2 IF5 1/20.3624 3/42 11/1610, 15, 20
3-1/2 API Reg Flush4 1/20.3374 1/21 1/210, 15, 20
4-1/2 API Reg Flush5 1/2.362/.4785 1/22 1/410, 15, 20
AWJ/AW w/Flats1 3/4.188/.2501 3/4 5/85,10
NWJ/NW w/Flats2 5/8.188/.2502 5/81-1/4 or 1-3/85,10


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

1.2-7/8" 10 foot length schedule 80 modified IF drill pipe:  (278IF) 


NameABCDEFGH
TOOL JOINTS:1
2 3/8 API Regular2-3/8"3-1/8"2-5/8"35360° API1
2 7/8 API Regular2-7/8"3 3/433 1/25360° API1 1/4
3 1/2 API Regular3 1/24 1/43 1/23 3/45360° API1 1/2
4 1/2 API Regular4 1/25 1/24-5/8"4 1/45360° API1 1/4
2 3/8 API Internal Flush2-3/8"3-3/8"2-7/8"34260° API1 3/4
2 7/8 API Internal Flush2-7/8"4-1/8"3 25/643 1/24260° API2-1/8"
3 1/2 API Internal Flush3 1/24 3/44  1/6444260° API2 11/16
2 3/8 Mayhew Junior2-3/8"2 3/42 21/642 1/44260° Mod. API1 1/2
2 3/8 Mayhew Regular2-3/8"3 1/42 35/64341 1/260° Mod. API1-5/8"
2 7/8 Mayhew Full Hole2-7/8"3 3/43  3/643-3/8"41 1/260° Mod. API2
2 3/8 Failing Exploration2-3/8"2 31/322 1/22 3/44260° Mod. API1 1/2
2 7/8 Failing Exploration2-7/8"3 3/43-1/8"3 1/44260° Mod. API1-7/8"
2 3/8 Hughes Acme Regular2-3/8"3-1/8"219/32343-3/8"29° Acme1
2 3/8 Winter Weiss2-3/8"3 1/4235/64341 1/260° Mod. API1 1/2
2 7/8 Winter Weiss2-7/8"37/16235/64341 1/260° Mod. API1 1/2
3 1/2 API Full Hole3 1/24-5/8"43 3/45360° Mod. API27/16
FLUSH JOINT TAPERED THREAD
United Geophysical (1 11/16 OD)111/16111/161-3/8"16329° Acme1


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