Sub Adaptor

The Mammoth Sub Adaptor is a short length of drill collar that has male threads on one end and female on the other. It is screwed onto the top or bottom of the drill rod and onto the drill bit.
It serves as a crossover between the drill rod connections and the bit connection

Mammoth Sub Adaptor

Product Description

The Mammoth Sub Adaptor is a short length of drill collar that has male threads on one end and female on the other. It is screwed onto the top or bottom of the drill rod and onto the drill bit. It serves as a crossover between the drill rod connections and the bit connection..

Requirements from customer

Drill manufacturer
Drill model
Drill rod diameter
Shoulder to shoulder length
Actual thread size
Spanner flat position

Benefits of the Mammoth Sub Adaptor

Quality manufacturing
Durability for the best performance
Produced to our outstanding quality control
Fully repairable

Mammoth Sub Adaptor Technical Specifications

Specifications

The Mammoth Top Sub | Bottom Sub can be designed to fit any OEM machine application.
The Mammoth Top Sub | Bottom Sub is not limited to any specific range only.
Mammoth Top Subs | Bottom Subs can be manufactured to customer specifications & thread requirements

Common Specifications

All designs, specifications and components of the equipment described herein are subject to change at the manufacturer’s discretion at any time without prior notice.

Outside Diameter (in)	Outside Diameter (mm)	Recommended Connection
2⅜”	60.3mm	2⅜” REG
2½”	63.5mm	2⅜” REG
2⅝”	66.7mm	2⅜” REG
2¾”	69.9mm	2⅜” REG
2⅞”	73.0mm	2⅞” REG
3″	76.2mm	2⅞” REG
3⅛”	79.4mm	2⅞” REG
3¼”	82.6mm	2⅞” REG
3½”	88.9mm	3½” REG
3¾”	95.3mm	3½” REG
4″	101.6mm	3½” REG / 3½” BECO
4¼”	107.9mm	3½” API / 3½” BECO
4½”	114.3mm	3½” API / 3½” BECO
4¾”	120.7mm	3½” BECO
5″	127.0mm	3½” BECO
5¼”	133.4mm	3½” BECO
5½”	139.7mm	3½” BECO
5¾”	146.1mm	4″ BECO
6″	152.4mm	4″ BECO
6¼”	158.8mm	4″ BECO
6½”	165.1mm	4½” BECO
6⅝”	168.3mm	4½” BECO
6¾”	171.5mm	4½” BECO
7″	177.8mm	4½” BECO / 5¼” BECO
7¼”	184.2mm	5¼” BECO
7½”	190.5mm	5¼” BECO
7⅝”	193.7mm	5¼” BECO
7¾”	196.9mm	5¼” BECO
8″	203.2mm	6″ BECO
8¼”	209.6mm	6″ BECO
8⅝”	219.1mm	6″ BECO
9″	228.6mm	6″ BECO
9¼”	234.9mm	6″ BECO
9½”	241.3mm	6″ BECO
9¾”	247.7mm	8″ BECO
10″	254.0mm	8″ BECO
10¼”	260.4mm	8″ BECO
10½”	266.7mm	8″ BECO
10¾”	273.1mm	8″ BECO

Specification Details

Size Range 60.3 mm – 273 mm
Thread Range 2⅜” REG – 8″ BECO
Top Sub Pin: API / Box: BECO / API
Bottom Sub Pin: API / BECO / Box: API
Bit Thread Sizes Manufactured to suit customer machine and drilling application
Shoulder-to-Shoulder As per customer requirements or specifications
Spanner Flats As per customer requirements or specifications
Material High-strength alloy steel
Manufacturing Process Precision CNC machined and heat treated
Custom Designs Manufactured to customer drawings or OEM specifications

Mammoth Top Subs | Bottom Subs can be manufactured to customer specifications & thread requirements.

When rods must be added to increase the depth of drilling, the loosening of the threads are now performed at the bottom end of the saver sub as opposed to the bottom of the top drive (rotary head) which is the most expensive part of the drill string. This means that the connection between the top end of the saver sub and top drive (rotary head) is seldom used, and suffers minimal wear and tear, whereas the lower connection is used in almost all cases displacing the most wear and tear from the rotary head connection to the much lower cost, saver sub which is expendable and does not represent a major investment. The top drive or rotary head component, on the other hand represent a significant capital outlay and considerable downtime when it needs to be replaced.