Symmetric Overburden Casing System

• Certification: ISO 9001:2008
• Surface Treatment: Without Processing
• Manufacturing Process: Forging
• Material: Alloy Steel
• Model: Concentric Casing System with Ring Bit
• Matched Drill Rig: DTH Drill Rig
• Model NO.: 140-710MM
• Application: Pile Drilling
• Parts: Ring Bit,Pilot Bit
• Transport Package: Wooden Case or Carton
• Specification: OD168-OD813
• Trademark: Teamwhole
• Origin: China
• HS Code: 82071990
• Production Capacity: 5000PCS/Month

Product Description

Application Range
It is recommended to drill in rock formation where contains some ovals and fractures.

Design Principles
 Make the casing follow easy and the equipment and operation simple 

Outstanding Advantages
1.The stable and reliable working performance and the less vibration of drill rig.
2.Flexible to open and close.

Operation Procedure
1.when the drilling starts, the ring bit slides down through the grooves on pilot bit,and reams to drive the casing shoes and tubes into the hole.
2.When finished the drilling in overburden rock formations, raise the drilling tools and the blocks will get closed through the grooves , and the drilling tools can be pulled out from the hole.
3. Next construction can be followed.

Teamwhole concentric casing drilling systems

 

Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, 

silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.

Use concentric system can drill this complex formation very well.

The systems are available through the whole product range the smallest being for 114 mm (4 1/2") casing and 

largest size available at the moment is for 1220 mm (48") casing.

 

Application Range

Applied to over burden formations with complex topographic and geological conditions,such

as gravel,fissured formation,boulder,landfill of construction refuse etc.

Drill at any angle

good  straightness of borehole

Maximum depth of borehole can reach 150 meters

Intergrated ring bit and casing shoe(permanent)

Model	Outer Dia. of Casing Tube (mm)	Inner Dia. of Casing Tube(mm)	Wall thickness of casing (mm)	Ring Bit Outer Dia (mm)	Ring Bit Inner Dia (mm)	Max Outer Dia of Normal Bits (mm)	Hammer Type	Weight (kg)
For DTH Drilling
R114/6.5-80	114	101	6.5	122	80	78	COP32/COP34/DHD3. 5/BR3/MACH303	11.5
R127/10-93	127	107	10	136	93	91		15
R133/10-96	133	113	10	141	96	94	COP44/DHD340/MACH44 /MISSION40SD4/XL4/QL40	15.5
R139/10-102	139	119	10	147	102	100		19.5
R152/10-114	152	132	10	160	114	112		25
R168/10-130	168	10	148	177	130	128	COP54/DHD350/MACH5 0/MISSION50/SD5/QL50	36.5
R177/10-139	177	10	157	187	139	137		43
R193/12.7-152	193	167.6	12.7	203	152	150	COP62/COP64/DHD360/MISSION6 0/SD6/XL6/QL60/TD150	49
R219/12.7-175	219	193.6	12.7	232	175	173		61
R244/12.7-198	244	218.6	12.7	254	198	196	COP84/DHD380/SD 8/QL80/TS180	78
R254/12.7-205	254	228.6	12.7	266	205	203		90
RP273/12.7-224	273	247.6	12.7	285	224	222		130
R323/12.7-271	323	297.6	12.7	338	271	269		188
R406/12.7-350	406	380.6	12.7	420	350	348	DHD112/QL120/SD12/NUMA120	335
R457/12.7-376	457	431.6	12.7	477	376	374		440
R508/16-444	508	476	16	524	444	442		520
R558/16-491	558	526	16	575	491	489	QL200/SD18/NUMA18 0/TH18/TS18/TK18	610
R609/16-553	609	577	16	637	553	551		670
R660/16-590	660	628	16	678	590	588		780
R711/16-639	711	679	16	731	639	637	QL200S/TH32/TK24	930
R762/16-690	762	730	16	781	690	688		1070
R812/16-734	812	780	16	834	734	732		1285
R863/16-788	863	831	16	882	788	786		1450
R914/16-835	914	882	16	935	835	833		1720
R1016/16-911	1016	984	16	1033	911	909	QL300	22

Intergrated ring bit and casing shoe with retrievable available

 

 

Solitary ring bit(permanent)

 

Model	Outer Dia. of Casing Tube (mm)	Inner Dia. of Casing Tube(mm)	Wall thickness of casing (mm)	Ring Bit Outer Dia (mm)	Ring Bit Inner Dia (mm)	Max Outer Dia of Normal Bits (mm)	Hammer Type	Weight (kg)
For DTH Drilling
P114/8-73	114	98	8	129	73	71	COP32/COP34/DHD3. 5/BR3/MACH303	12
P139/10-98	139	119	10	159	98	96	COP44/DHD340/MACH44 /MISSION40/SD4/XL4/QL40	17
P152/10-92	152	132	10	162	92	90		20.5
P168/12.7-123	168	142.6	12.7	188	123	121	COP54/DHD350/MACH50 /MISSION50/SD5/QL50	29
P177/12.7-129	177	151.6	12.7	196	129	127		40.5
P193/12.7-145	193	167.6	12.7	214	145	143	COP62/COP64/DHD360 /MISSION60/SD6/XL6/QL60/TD150	43.5
P219/12.7-144	219	193.6	12.7	231	144	142		51
P244/12.7-160	244	218.6	12.7	258	160	158	COP84/DHD380/SD8/QL80/TS180	73
P273/12.7-191	273	247.6	12.7	291	191	189		101.5
P323/12.7-238	323	297.6	12.7	339	238	236		151
P406/12.7-362	406	380.6	12.7	428	362	360	DHD112/QL120/SD12/NUMA120	266
P457/14.2-406	457	428.6	14.2	475	406	404		386
P508/16-445	508	476	16	518	445	443		452
P558/12.7-475	558	532.6	12.7	570	475	473	QL200/SD18/NUMA180/TH18/TS18/TK18	494
P609/16-551	609	577	16	628	551	549		610
P660/16-565	660	628	16	680	565	563		691
P711/16-642	711	679	16	732	642	640	QL200S/TH32/TK24	930
P762/16-667	762	730	16	781	667	635		1003
P812/16-736	812	780	16	838	736	714		1150
P914/16-836	914	882	16	932	836	834		1580
P1016/16-911	1016	984	16	1033	911	909	QL300	2175