Concentric Casing Drilling System with Double Wings

Rock Drilling Tools

Concentric Casing Drilling System with Double Wings

The casing coupling is manufactured from higher-grade material than the casing itself and heat-treated, ensuring reliable and secure connections.
The casing shoe is heat-treated to extend service life.

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Typical Applications

Suitable for overburden formations dominated by loose materials, such as soil, clay, weathered rock layers, sand, and gravel. This drilling system is mainly applied in water well drilling, foundation engineering, slope stabilization projects, and geothermal drilling.

Anchoring

Water well drilling

Technical Specifications

Model	O.D. of casing tube , mm	I.D. of casing tube, mm	Thickness, mm	Max. guide device diameter, mm	Reamed diameter, mm	Min.O.D. of casing shoe, mm	No. of Wings	DTH hammer	Weight , kg
Model	D	I.D. of casing tube, mm	h	H	C	G	No. of Wings	DTH hammer	Weight , kg
T90	114	101	6.5	99	125	90	2	3.5''	15
T115	146	126	10	124	157	117	2	4''	20.5
T136	168	148	10	145	180	136	2	5''	33.5
T142	178	158	10	154	195	142	2	5''	39
T160	194	174	10	172	206	160	2	6''	48

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In what situations is a double-wing casing drilling system used?

In overburden formations composed mainly of loose materials such as soil, clay, weathered rock, sand, and gravel, where borehole verticality is required.

What are the advantages of the double-wing casing drilling system?

It is the only casing drilling system with an appearance and configuration similar to conventional non-casing drill bits, offering strong cost-effectiveness and practical usability.