Cheapest Factory Down Hole Hammer Bit Failure - Concentric Casing System With Ring Bit – Spark

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Cheapest Factory Down Hole Hammer Bit Failure - Concentric Casing System With Ring Bit – Spark Detail:

Application

Applied to over burden formation with complex topographic and geological conditions, such as gravel, fissured formation, boulder, landfill of construction etc.

Specification

	D		h	H	C	G
Specification	O. D. of Casing Tube (mm)	I.D. of Casing Tube(mm)	Wall thickness of casing (mm)	Max. O.D. of pilot bit (mm)	Ring Bit O.D. (mm)	Max. O.D. of Normal Bit (mm)	Hammer Type	Weight(kg)
TOP hammer type
P76/7-39	76	62	7	57	88	39	R32	3.2
P89/8-58	89	73	8	70	100	58	T38	5.8
P114/9-84	114	94	10	92	126	84	T45	7.5
P127/10-93	127	107	10	105	142	93	T45	10
P140/10-97	140	120	10	116	161	97	T45,T51	15
DTH hammer type
P114/9-84	114	94	10	94	126	84	COP34/COP32/DHD3.5	12
P127/10-93	127	107	10	105	142	93	COP34/COP32/DHD3.5	16
P140/10-97	140	120	10	116	161	97	COP44/DHD340/M40/SD4/QL40	21
P146/10-110	146	126	10	124	165	110	COP44/DHD340/M40/SD4/QL40	22
P168/12.7-127	168	142.6	12.7	141	188	127	COP54/DHD350/M50/SD5/QL50	27
P178/12.7-131	178	152.6	12.7	150	196	131	COP54/DHD350/M50/SD5/QL50	32.5
P194/12.7-145	194	168.6	12.7	166	214	145	COP64/DHD360/M60/SD6/QL60	42.5
P219/12.7-170	219	193.6	12.7	191	243	170	COP64/DHD360/M60/SD6/QL60	58
P245/12.7-195	245	219.6	12.7	214	268	195	DHD380/COP84/SD8/QL80	78
P254/12.7-203	254	228.6	12.7	224	276	203		84.5
P273/12.7-223	273	247.6	12.7	241	305	223		100
P325/12.7-276	325	299.6	12.7	292	350	276		135
P406/12.7-350	406	380.6	12.7	377	442	350	DHD112/QL120/SD12/N120	280
P508/12.7-416	508	482.6	12.7	478	545	416	DHD112/QL120/SD12/N120	522
P560/12.7-475	560	534.6	12.7	528	595	475	NUMA180SD18/Numa180/TH18/TS18/TK18	620
P610/12.7-513551	610	584.6	12.7	558	645	513	NUMA180	710

Operation Schematic Figure

Concentric casing - 1
Concentric casing - 2
Concentric casing - 3

Step1: The drilling in over burden formation is finished.

Step2: Reverse rotation of the hammer and pull the pilot bit out from the hole.

Step3: Replace the pilot bit with normal bit to continue drilling down.

Product Details

Concentric casing - 4
Concentric casing - 5

Product detail pictures:

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