Symmetric Casing Drilling System Features and Advantages

• Standard: RoHS, CE, AISI, API
• Usage: Oil Mining, Coal Mining, Well Drilling, Ore Mining
• Material: High Manganese Steel
• Transport Package: Wooden Box
• Specification: ODEX
• Trademark: ROSCHEN
• Model NO.: 4 1/4 ~ 34 inch
• Origin: China
• HS Code: 84314320
• Production Capacity: 10000

Product Description

Retrievable symmetric drilling system 
 

Retrievable symmetric drilling system by DTH hammer is designed to drill and case a hole simultaneously through unstable ground conditions. The driver rock drill bits incorporated with a satisfactory ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, minimizing the disruption of the drill hole's surrounding.
 
Symmetric Casing Drilling System Features and Advantages:

1. Stable and reliable working performance
2. Full face head design for faster penetration and straighter hole
3. Less torque is required than eccentric drilling
4. Can drill in vertical, horizontal or any direction
5. Minimize disruption to the drilled hole
6. Effective cuttings removal
7. Unlocking-relocking easily
8. Easy to operate and system security
9. Varied ring bit diameters to suit different casing requirement
10. The less vibration of drill rig

 
 Symmetric Casing Drilling System is designed to drill holes of many sizes, ranging from 108 to 863mm (4 1/4 to 34 in), at any angle (including horizontal), to any depth (beyond 100 meters) through unconsolidated formations simultaneously with casing. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, and thus minimizing the disruption of the surrounding of the drill hole. It makes the casing follow easy and the equipment and operation simple, and is recommended to a multitude of applications, such as micro-piling, underpinning, anchoring, marine work and horizontal drilling etc.. 
 

Casing Tube OD		Ring Bit OD		Min. Casing Shoe ID		Pilot Bit Diameter		Hammer Shank Style
mm	inch	mm	inch	mm	inch	mm	inch
108~127	4 1/4 ~ 5	118~134	4 5/8 ~ 5 1/4	78~101	3 1/16 ~ 4	77~92	3 1/32 ~	DHD3.5, Cop34, Mission 30
							3 5/8
140~146	5 1/2 ~	150 ~156	5 27/64 ~	94~117	3 45/64 ~	105~124	4 1/8 ~	DHD340A, SD4, QL40, Mission40
	5 3/4		6 1/8		4 5/8		4 57/64
168~178	6 5/8 ~ 7	178~195	7 ~ 7 5/8	121~150	4 3/4 ~ 5 7/8	125~156	4 59/64 ~	DHD350R, SD5, QL50, Mission50
							6  9/64
194~219	7 5/8 ~	203~234	8 ~ 9 1/4	148~190	5 5/8 ~	150~203	5 7/8 ~ 8	DHD360, SD6, QL60, Mission60
	8 5/8				7 1/2
219~325	8 5/8 ~	235~348	9 1/4 ~	190~284	7 1/2 ~	165~306	6 1/2 ~	DHD380, QL80, SD8, Mission 80
	12 3/4		13 11/16		11  3/16		12  3/64
244~406	9 5/8 ~16	273~440	10 3/4 ~	210~364	8 1/4 ~	190~340	7 1/2 ~	SD10, Numa100
			17  5/16		14  5/16		13 25/64
406~558	16 ~ 22	419~590	16 1/2 ~	328~514	12 27/32 ~	340~440	13 25/64 ~	SD12, DHD112, Numa120, Numa125
			23 1/4		20 1/4		17 3/8
508~762	20 ~ 30	526 ~798	20 45/64 ~	412~716	16 1/4 ~	470~685	18 1/2 ~	SUP205
			31  7/16		28  3/16		26 31/32
609~762	24 ~ 30	637~798	25 ~	513~716	20 3/16 ~	540~685	21 1/4 ~	SUP245
			31  7/16		28  3/16		26 31/32
863	34	900	35  7/16	815	32  3/32	785	30 27/32	SUP325

 

ROSCHEN GROUP is professional in manufacturing and supplying quality bq casing advancer as one of the leading manufacturers and suppliers in China. We now bring you high quality bq casing advancer for sale, competitive in its excellent performance and high precision. Please rest assured to buy.