How Can We Guarantee Quality?

Strictly follow API and industry standards for production, using specialized materials for production Always a pre-production sample before mass production; Always final Inspection before shipment;

What Other Related Products Or Services Does Our Company Have?

Our main products include DTH (DTH hammer and bore capacity ranging from 3-bit "32" (76mm - 800mm) diameters, DTH and large- diameter deep hole drilling, eccentric casing systems (ODEX) and concentic casing systems, reserve circulation hammers and bits, drilling RIGS, rock drilling accessories and other related equipment. Products are widely used in open or underground mining, water conservancy engineering, bridge engineering. construction engineering. Geotechnical engineering and other fields. Our products have been used in China and exported to more than 40 countries and regions.

How To Solve Your Technical Doubts? How To Get A Accurate Price?

Please contact email info@bitschina.et Or WhatsApp+86 15076382950, we will arrange professional personnel as soon as possible to solve your technical doubts one by one and provide you with a price quotation.

Concentric Casing System with Ring Bits

· Geological disaster prevention and control (anchor cables, anchoring, landslied prevention and control, high slope stabilization);

· Curtains and cofferdams (curtains and cofferdams of hydropower stations, reservoirs, etc.);

· Building foundation treatment (slope support treatment of high-rise buildings, bridge piers, deep foundation pits,etc.);

· Tunnel pipe shed support (support treatment of highwat and railway tunnels);

· Water well wall protection.

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WhatsApp +86 15076382950

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Specification

Casing Shoe

Ring Bit

Pilot Bit

Used to connect

the casing tube.

Used to connect the pilot bit and casing shoe.

The major structure of concentric casing system, with buttons and flushing grooves, etc.

Related Parts List
NO.	TIEM	DESCRIPTION
1	Casing tube	a. Threaded casing tube, left hand thread; b.Welding casing tube
2	Drill pipe	Thread: API,REG,IF,NC
3	Stabilizer	Thread of stabilizer is same as that of drill pipe
4	DTH hammer	Thread type: API,REG,IF,NC
5	Casing shoe	a. Threaded casing shoe, left hand thread; b.Welding casing shoe
6	Casing system	1) Eccentric casing system 2) Concentric casing system with rings 3) Concentric casing system with three claws 4) Concentric casing system with wings 5) Concentric casing system with blocks
All above items are available to provide in one stop.

Product Specification

Model	D	T	H	C	G	Bit shank	Weight (kg)
Model	Casing tube OD (mm)	Thickness (mm)	Max OD of pilot bit(mm)	Reamed diameter (mm)	Max OD of normal bit(mm)	Bit shank	Weight (kg)
P76	76	8	57	88	39	R32	3.2
P89	89	8	70	102	58	T38	4.8
P114	114	9	94	128	74	T38,R38	9.5
P127	127	10	105	142	93	T45	11
P140	140	10	116.5	161	99	T45,T51	11.5
P114	114	10	92	128	74	DHD3.5	10
P127	127	10	105	142	93	DHD3.5	13.4
P140	140	10	116.5	161	99	DHD340,SD4,QL40	17
P146	146	10	123	165	110	DHD340,SD4,QL40	21
P168	168	10	141	188	127	DHD350,SD5,QL50	28.7
P178	178	10	155	198	136	DHD350,SD5,QL50	33.6
P194	194	12.7	166	214	145	DHD360,SD6,QL60	44
P219	219	12.7	191	243	170	DHD360,SD6,QL60	59.3
P245	245	12.7	214	268	195	DHD380,SD8,QL80	80.7
P254	254	12.7	224	276	203	DHD380,SD8,QL80	85.7
P273	273	12.7	241	305	221	DHD380,SD8,QL80	102.7
P325	325	12.7	292	350	276	DHD380,NUMA100,SD10	142.3
P355	355	12.7	326	380	306	NUMA100,SD10	189
P406	406	12.7	377	442	350	DHD112,QL120,SD12, NUMA120	292.4
P480	480	12.7	452	510	426	TK14,NUMA125	390
P508	508	12.7	476	541	449	TK18,NUMA180	503.6
P560	560	12.7	530	590	480	TK18,NUMA180	620
P610	610	12.7	558	642	513	TK18,NUMA180	717
P711	711	14.5	676	742	636	TK24	1124
P813	813	18	740	840	700	TK24	1504

Applicable formation: It is suitable for covering layers with more complex geological conditions, such as pebbles, cracks, dead stones, boulders, construction backfill waste, etc.

Working procedure:

upload/attachment/image/202604/07/17755525535894eee10bdaa7762246ba38c056b885_local.png

1.When the drilling starts the pilot bit drive the ring bit down to the hole, foll-owed the casing shoe and casing tube.

2. When drilling the bedrock, reserve rotation of the tools and pull the pilot bit out from the hole, leaving the ring bit in the hole.

3. Pour the concrete or do the next construction work.

4. Using normal bit to drill to the desried depth.

FAQs

Q
How Can We Guarantee Quality?

A
Strictly follow API and industry standards for production, using specialized materials for production Always a pre-production sample before mass production; Always final Inspection before shipment;
Q
What Other Related Products Or Services Does Our Company Have?

A
Our main products include DTH (DTH hammer and bore capacity ranging from 3-bit "32" (76mm - 800mm) diameters, DTH and large- diameter deep hole drilling, eccentric casing systems (ODEX) and concentic casing systems, reserve circulation hammers and bits, drilling RIGS, rock drilling accessories and other related equipment. Products are widely used in open or underground mining, water conservancy engineering, bridge engineering. construction engineering. Geotechnical engineering and other fields. Our products have been used in China and exported to more than 40 countries and regions.
Q
How To Solve Your Technical Doubts? How To Get A Accurate Price?

A
Please contact email info@bitschina.et Or WhatsApp+86 15076382950, we will arrange professional personnel as soon as possible to solve your technical doubts one by one and provide you with a price quotation.