Double Drifters Casing System for Precision Geothermal Drilling Projects Concentric Casing Drilling Tools

• Customization: Available
• Customized: Customized
• Standard: AISI, API
• Length: Stub-length
• Type: Drill Tool
• Material: Alloy Steel
• Usage: Well Drilling
• Matched Drill Rig: DTH Drill Rig
• Inserts Design: Spherical; Ballistic; Parabolic
• Product Name: Casing System
• Processing Type: Forging
• Use: Well Drilling,Coal Mining,Quarry Drilling
• Application: Water Well Drilling
• Color: Customized
• Features: Fast Speed, High Efficiency
• Advantage: High Performance
• Video Outgoing-Inspection: Supported
• Condition: New
• Parts: Pilot Bit Blcoks
• Face Design: Flat;Convex;Concave
• Dimension: 118mm-216mm
• Key Word: Concentric Casing Drilling Tools
• Transport Package: Wooden Box
• Specification: 76-1000mm
• Origin: Changsha, Hunan, China
• HS Code: 82071990
• Production Capacity: 15, 000PCS/Year

Product Description

Product Description

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

Economy: Concentric 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.

A driver bit and a ring are assembled to a complete concentric system bit which is suit for 114-1067mm diameter tube.

Outstanding Advantage:

• Enhance penetration and perpendicularity

• Reduce torque requirements

• Deal with straight, oblique hole and other angle holes

• Lowest effect with environment

• High grade tungsten carbide inserts

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

External dia.(mm): 125/155/188/215/238/276/293/345/375/432...1090
Casing dia.(OD*ID,mm): 114*102/139*127/168*153/194*181...1067*1041
 

Product Parameters

 

A	B	C	D	E	F
Outer Dia Of Casing Tube (mm)	Inner Dia Of Casing Tube(mm)	Reamed Dia(mm)	Min Inner Dia Of Casing Shoe(mm)	Drill Pipes(mm)	Max.Outer Dia of Normal Bit(mm)
114	101-103	127	91	76	77
127	114-116	136	101	76	82
140	124-127	152	117	76	92
146	127-132	154	117	76	105
168	149-155	184	140	76	105
178	159-165	194	150	76.89	125
193	173-180	206	164	76.89	140
219	199-206	234	184	89.114	150
244	224-231	260	210	89.114	165
273	251-257	305	240	114	190
323	301-310	348	284	114.127	220
406	382-388	440	364	127	255
457	433-439	488	413	140	340
508	484-490	538	464	140	385
558	534-540	590	514	140	440
610	586-592	642	566	140	485
660	636-642	694	615	168	540
711	687-693	745	665	168	590
762	738-744	798	716	168	640
863	839-845	900	815	168	685

Product detailed photos: