Rock Drilling Bits Eccentric Casing Bit Eccentric Casing System with Ring Bits

Product Description

Product Description:

Overburden Casing System,  also named Eccentric Casing System, is suitable for drilling water wells, geothermal wells, short mircopiles,medium mini-type grouting hole of building, diamond harbour project.

Economy: Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole.

Working Principle:

When drilling, the reamer bit will rotate out to enlarge the hole which enough for the casing tube slide down behind the reamer. When reached required depth, the drill pipe will drill to the reverse direction and the reamer bit will retract, It is allowing the whole drilling system to pass through the casing.

Competitive Advantage:

• High grade tungsten carbide inserts

• Bit bodies manufactured from high grade steel and processed using state-of-the-art CNC machinery and heat treatment

Specification:

Part	Model
	PA90	PA115	PA140	PA165	PA190
Casing Tube(max.O.D.)(mm)	115	142	171	195	222
Casing Tube (min.O.D.) (mm)	102	128	155.6	182.6	205
Guide Sleeve	Effective length: 174mm	Effective length: 174mm	Effective length: 205mm	Effective length: 225mm	Effective length: 250mm
Drill Pipe	Connection Thread: API2 3/8"Reg; O.D.: 76mm; Wrench Flats: 65mm	Connection Thread: API2 3/8"Reg; O.D.: 76mm; Wrench Flats: 65mm	Connection Thread: API2 3/8"Reg O.D.: 89mm Wrench Flats: 65mm	Connection Thread: API3 1/2"Reg O.D.: 114mm Wrench Flats: 95mm	Connection Thread: API3 1/2"Reg O.D.: 114mm Wrench Flats: 95mm
DTH Hammer	DHD35, COP2, MISSION30	COP44, DHD340, MISSION40	DHD55, COP54, MISSION50	COP64, DHD360, MISSION60	COP64,DHD360, MISSION60
Casing Shoe	L3=90mm L4=55mm D3=101.7mm D4=93mm	L3=76mm L4=55mm D3=127.5mm D4=117mm	L3=90mm L4=63mm D3=155.3mm D4=143mm	L3=95mm L4=55mm D3=181.5mm D4=166mm	L3=110mm L4=70mm D3=204.7mm D4=193mm
Guide Device	L1=35mm L2=138mm D1=92mm D2=100mm	L1=48mm L2=136mm D1=115mm D2=126mm	L1=55mm L2=160mm D1=141mm D2=154mm	L1=61.5mm L2=181.5mm D1=165mm D2=178mm	L1=62.8mm L2=185mm D1=191mm D2=203mm
Reamer	D5=91mm L5=70mm Reaming Diameter: 123mm; Reamer has 4*Ф12 buttons	D5=114mm L5=89mm Reaming Diameter: 152mm Reamer has 5*Ф14 buttons	D5=138mm L5=69.5mm Reaming Diameter: 185mm Reamer has 7*Ф14 buttons	D5=164mm L5=79.5mm Reaming Diameter: 211mm Reamer has 7*Ф14 buttons	D5=185.5mm L5=90.2mm Reaming Diameter: 237mm Reamer has 7*Ф16 buttons
Pilot Bit	D6=90mm L6=59mm Gauge button: 8*Ф12 Front button:6*Ф10	D6=114mm L6=67mm Gauge button: 8*Ф14 Front button:6*Ф12	D6=138mm L6=66mm Gauge button: 8*Ф16 Front button:8*Ф14	D6=165.8mm L6=82.5mm Gauge button: 8*Ф16 Front button:8*Ф16	D6=190mm L6=82mm Gauge button: 9*Ф18 Front button:9*Ф16

Different Shanks:



Different Faces Shapes:



Different Buttons Shapes:

A:When drilling starts working,reaming sleeve will open,borehole range will increase,which will casing shoe and casing tube.

B:When finish drilling in overburden layer,pay attention to reverse circulation,reaming sleeve circles up,eccentric drilling bit lifts out from the borehole.

C:The casing that can be left in the borehole to prevent borehole from collapsing while pulling out pipe and grouting concrete.

D:Regular drilling bits can be applied to drill the depth as required in the rock stratum.

FAQ:

Q1: Can I have a sample for testing?

A:Samples are still to be paid but discounted price can be provided. 

Q2: Do you have the inspection procedures?

A:100% strict inspection and testing for every order before packing.

Q3: How can i get the after sale services?

A:Free replacement will provide once the problems casued by our product quality.

Q4: Can I have a visit to your factory before the order?
 

A: Sure, welcome, here is our address: Yantai, Shandong.
 

CONTACT: