Eccentric Overburden Drilling Equipment

Eccentric drill bit is used for casing following drilling while drilling in soil layer.

Product Description
Specification

Eccentric Reamer System Operating Steps
1		2
At the beginning of drilling, the eccentric reaming sleeve spins out along the eccentric guide bit and begins reaming to ensure that the casing and drilling system advance simultaneously.		When drilling into the right position, carefully reverse, eccentric reaming sleeve cycle, and eccentric drilling system from the casing pull out.








3		4
The casing is pulled upwards and the concrete slurry or other filler is sprinkled at the bottom of the hole.		Conventional drilling tools are used in the bedrock to reach the required depth.

Type	① Casing Tube	② Drill Pipe	③ Guide Sleeve	④ TH-hammer	⑤	⑥	⑦	⑧
Type	① Casing Tube	② Drill Pipe	③ Guide Sleeve	④ TH-hammer	Casing Shop	Guide Device	Reamer	Pilot bit
NOD90	Maximun: 115mm	Connection Thread:	Effective length:	ND35, Cop32, IR3.5, NQL30	L3=90mm L4=55mm D3=101.7mm D4=93mm	L1=35mm L2=138mm D1=92mm D2=100mm	D5=91mm L5=70mm	D6=90mm L6=59mm
	Minmum: 102mm	API2 3/8”Reg	174mm				Reaming Diameter: 123mm	Gauge button
		O.D: 76mm					Reamer has 4XФ12 buttons	8 X Ф12
		Wrench Flats: 65mm						Front button
								6 X Ф10
NOD115	Maximun: 142mm	Connection Thread:	Effective length:	ND45, Cop44, NSD4, DHD340A, NQL40, NM4	L3=76mm L4=55mm D3=127.5mm D4=117mm	L1=48mm L2=136mm D1=115mm D2=126mm	D5=114mm L5=89mm	D6=114mm L6=67mm
	Minmum: 128mm	API2 3/8”Reg	174mm				Reaming Diameter: 152mm	Gauge button
		O.D: 76mm					Reamer has 5XФ14 buttons	8 X Ф14
		Wrench Flats:						Front button
		65mm						6 X Ф12
NOD140	Maximun: 168mm	Connection Thread:	Effective length:	ND55, Cop54, NSD5, DHD350R, NQL50	L3=90mm L4=63mm D3=155.3mm D4=143mm	L1=55mm L2=160mm D1=141mm D2=154mm	D5=138mm L5=69.5mm	D6=138mm L6=66mm
	Minmum: 155.40mm	API2 3/8”Reg	205mm				Reaming Diameter: 185mm	Gauge button
		O.D: 89mm						8 X Ф16
		Wrench Flats:					Reamer has 7XФ14 buttons	Front button
		65mm						8 X Ф14
NOD165	Maximun: 193.70mm	Connection Thread:	Effective length:	ND65, Cop64, NSD6, DHD360, NQL60	L3=95mm L4=55mm D3=181.5mm D4=166mm	L1=61.5mm L2=181.5mm D1=165mm D2=178mm	D5=164mm L5=79.5mm	D6=165.80mm L6=82.50mm
	Minmum: 181mm	API2 1/2”Reg	225mm				Reaming Diameter: 211mm	Gauge button
		O.D: 114mm					Reamer has 7XФ14 buttons	8 X Ф16
		Wrench Flats:						Front button
		65mm						8 X Ф16
NOD190	Maximun: 219mm	Connection Thread:	Effective length:	ND65, Cop64, NSD6, DHD360, NQL60	L3=110mm L4=70mm D3=204.7mm D4=193mm	L1=62.8mm L2=185mm D1=191mm D2=203mm	D5=164mm L5=79.5mm	D6=165.80mm L6=82.50mm
	Minmum: 205mm	API2 1/2”Reg	225mm				211mm	Gauge button
		O.D: 114mm					Reamer has 7XФ14 buttons	8 X Ф16
		Wrench Flats:						Front button
		95mm						8 X Ф16
NOD240	Maximun: 273mm	Connection Thread:	Effective length:	ND85, Cop84, NSD8, DHD380, NQL80	L3=110mm L4=65mm D3=259mm D4=241mm	L1=70mm L2=190mm D1=240mm D2=257mm	D5=238mm L5=100mm	D6=240mm L6=89.50mm
	Minmum: 260.4mm	API2 1/2”Reg	343mm				Reaming Diameter: 308mm	Gauge button
		O.D: 114mm					Reamer has 16XФ16 buttons	12 X Ф18
		Wrench Flats:						Front button
		95mm						32 X Ф16
NOD280	Maximun: 324mm	Connection Thread:	Effective length:	NSD10, NUMA100	L3=125mm L4=75mm D3=304mm D4=281mm	L1=97mm L2=254mm D1=280mm D2=303mm	D5=266mm L5=120mm	D6=280mm L6=135mm
	Minmum: 305mm	API2 1/2”Reg	305mm				Reaming Diameter: 378mm	Gauge button
		O.D: 114mm					Reamer has 22XФ18 buttons	12 X Ф18
		Wrench Flats:						Front button
		95mm						27 X Ф16

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