Symmetric Overburden Drilling Equipment

Detail

Parameters

We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, top hammer button bits, coupling, cross bits, drill rods located in Xiamen,Fujian,China.

Product specifications: Concentric/Symmetric Casing overburden Drilling System with Ring Bit

Casing Tube OD(mm)	Casing Tube ID(mm)	Reamed Dia(mm)	Casing Shoe ID(mm)	Polit bit Dia(mm)	Hammer Type	Drill Pipe (mm)
108	95	118	80	70	DHD3.5/QL30	76
114	101	128	90	80	DHD3.5/QL30	76
127	114	141	100	90	DHD3.5/QL30	76
140	124	154	110	98	DHD340/QL40	76
146	126	160	114	102	DHD340/QL40	76
168	148	182	132	120	DHD350/QL50	76/89
178	158	192	142	130	DHD350/QL50	76/89
183	163	198	152	138	DHD350/QL50	89/114
194	174	210	164	148	DHD360/QL60	89/114
219	199	235	184	170	DHD360/QL60	89/114
245	225	261	210	192	DHD380/QL80	114
273	253	293	238	219	DHD380/QL80	114/127
325	305	348	294	270	SD10/NUMA100	127
406	382	426	374	350	SD12/NUMA125	140

The Concentric/Symmetric casing system product line includes the enhanced system with striking faces and extracting highly resistant.

In horizontal drilling, the friction between the soil and the casing can become very important and Symmetrix reinforced bits are designed to resist abrasion under these conditions.

These systems are targeted for drilling in leading which the cutting ring is recovered for reuse. They can also be used for drilling deep holes vertical when it is not necessary to use an inside diameter of annular cutting important.

Reinforced systems are available for tubing sizes ranging between 140 mm and 1220 mm (5 1/ 2 "and 48").

Quality warranty
Our products are made of high quality steel and all spares parts are inspected strictly before shipping.
Production time
within 15-25 days after receiving the advance payment or full payment.

Transportation
according to your requests.

Package
The material of packing is ply-wooden cases and pallet to avoid the damage in transportation.