DTH Drill Pipe

Detail

Parameters

DTH drill pipe

Key features of a high quality DTH pipe are durability, accuracy and manage ability. SANSUNG's pipes are made from cold drawn piping, providing a superior surface finish and tolerance compared to conventional pipes made from hot rolled piping. This drastically reduces the risk of scaling from the pipes entering the hammer, a major cause of premature hammer failure.

The joints are friction welded to achieve maximum strength,and the threads of the end-pieces are heat treated for optimum durability and strength of the thread profile. This not only ensures long thread life, but also makes coupling and uncoupling quick and simple, reducing drilling time.

Pipe diameter should be close to the hammer diameter to provide optimum flushing, reducing the chances of getting stuck.

In most applications, SANSUNG standard API threads will be the best choice. SANSUNG also offers a wide range of subs and crossover subs to meet an array of demands, all manufactured to the same standards as the pipes.

The high pressure air is delivered to DTH hammer by DTH drill pipe, simultaneously it transfers the rotation and press force to the DTH hammer.

Standard DTH drill pipe:

Diameter: 76mm, 89mm, 102mm, 114mm, 127mm, 140mm, 152mm

Length: 1000mm, 1500mm, 2000mm, 3000mm, 5000mm, 6000mm

Thread： 2 3/8” API REG, 2 7/8” API REG, 3 1/2” API REG, 4 1/2” API REG, 2 3/8 API IF, 3 1/2 API IF

Special DTH drill pipe:

The drill pipe for Atlas Copco – Ingersol Rand T4, Schramm T64, Atlas Copco F6, L6 and L8, and the drill pipe for Sandvik DriltechD25/D40K

Drill Tube

A	C			J		D	Allowed	Approx	E
O D	Tool Joints			Length shoulder		Across	Pull Down	Weight unit	Width
(mm)	Tool Joints			to flat		Flat	Unit.	3m long	Spanner flat
Connection	C1	C2	J1	J2	(mm)	(KNm)	kgs	(mm)
Φ76	API 2 3/8” REG	25.4	38.1	16	90.5	65	5.4	26.6	38.1
Φ89	API 2 3/8” REG	28.6	38.1	11.1	76.2	69.8	11.2	53.4	60.3
Φ102	API 3 1/2” REG	44.4	57.1	15.8	90.5	63.5	14.2	53.1	50.8
Φ114	API 3 1/2” REG	38.1	57.1	15.8	69.8	92.2	22.2	77.4	69.8
Φ127	API 3 1/2” REG	44.4	57.1	12.7	95.2	20.6	47	114	58.8s
Φ140	API 3 1/2” REG	44.4	57.1	12.7	95.2	120.6	47	114	50.8
Φ152	API 4 1/2” REG	76.2	85.7	19	120.6	130.1	52.9	127	60.3

Box-Box Adapters

Connection		Length	Length	Width	Std bore	Outside diameter		Across
Connection		Length	Spanner	Spanner flats	Std bore	Top	Bottom	Flat
Box up	Box down	C	J	E	d	D1	D2	F
A	B	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)
API 2 3/8” REG	API 2 3/8” REG	219	57.1	50.8	38.1	88.9	88.9	69.85
API 2 7/8” REG	API 2 3/8” REG	219	69.85	50.8	38.1	114.3	88.9	98.4
API 2 3/8” REG	API 3 1/2” REG	128.6	57.1	50.8	38.1	88.9	114.3	69.8
API 3 1/2” REG	API 3 1/2” REG	241.3	69.85	50.8	44.45	114.3	114.3	98.4
API 3 1/2” REG	API 4 1/2” REG	269.8	88.9	50.8	58.7	114.3	146	98.4
API 2 7/8” REG	API 3 1/2” REG	241.3	69.85	50.8	44.45	114.3	51.7	98.4
API 4 1/2” REG	API 2 7/8” REG	250.8	76.2	50.8	44.45	114.3	146	98.4

Pin-Box Adapters

Connection		Length	Length	Width	Std bore	Outside diameter		Across
Connection		Length	Spanner	Spanner flats	Std bore	Top	Bottom	Flat
Box up	Pin down	C	J	E	d	D1	D2	F
A	B	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)
API 2 3/8” REG	API 2 3/8” REG	140	50.8	65	24	88.9	88.9	69.85
API 2 3/8” REG	API 2 7/8” REG	134.9	69.85	50.8	31.75	88.9	88.9	69.85
API 2 3/8” REG	API 3 1/2” REG	146	39.7	50.8	25.4	114.3	88.9	98.4
API 3 1/2” REG	API 3 1/2” REG	101.6	39.7	50.8	44.45	127	127	98.4
API 3 1/2” REG	API 4 1/2” REG	134.9	39.7	50.8	52.4	114.3	146	98.4
API 2 7/8” REG	API 2 3/8” REG	134.9	39.7	50.8	31.75	88.9	88.9	69.85
API 2 7/8” REG	API 3 1/2” REG	134.9	39.7	50.8	44.45	114.3	114.3	98.4
API 2 7/8” REG	API 4 1/2” REG	174.6	100	50.8	44.45	114.3	146	98.4

Pin-Pin Adapters

Connection		Length	Length	Width	Std bore	Outside diameter		Across
Connection		Length	Spanner	Spanner flats	Std bore	Top	Bottom	Flat
Pin up	Pin down	C	J	E	d	D1	D2	F
A	B	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)
API 2 3/8” REG	API 2 3/8” REG	70	20	50.8	24	78	78	65
API 2 3/8” REG	API 2 7/8” REG	152.4	50.8	50.8	25.4	88.9	88.9	69.85
API 2 3/8” REG	API 3 1/2” REG	96	35	50.8	24	114.3	114.3	98.4
API 3 1/2” REG	API 3 1/2” REG	177.8	63.5	50.8	44.45	114.3	114.3	98.4
API 3 1/2” REG	API 4 1/2” REG	92	12.7	69.85	38.1	114.3	139.7	120.65
API 4 1/2” REG	API 4 1/2” REG	203.2	76.2	50.8	58.7	146	146	120.65