Match 8 Inch Hammer Eccentric Overburden Drilling System

• Customized: Customized
• Standard: API
• Length: Taper-length
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: 325
• Type: Center Drill Bit
• Material: High Carbon Steel
• Usage: Well Drilling
• Name: Eccentric Drilling Bit
• Casing Tube O.D.: 325mm
• Maximum O.D. of Guide Device: 297mm
• Bit Diameter: 280mm
• Casing Shoe I.D.: 285mm
• Maximum Reaming O.D.: 355mm
• Hammer Style: 8-10"
• Transport Package: Wooden Case
• Specification: 108-377mm
• Trademark: HW
• Origin: China Shandong
• HS Code: 8207191000
• Production Capacity: 10000PCS/Month
• Package Size: 60.00cm * 30.00cm * 50.00cm
• Package Gross Weight: 50.000kg

Product Description

Product Description

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.

 

working principle:

 

 

 

 

 

Operation steps:

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.

Specifications:

model	casing tube O.D./mm	Maximum O.D. of guide device/mm	bit diameter/mm	casing shoe I.D./mm	maximum reaming O.D./mm	hammer style
108	108	92	84	86	118	3"
114	114	100	92	94	124	3"
127	127	110	100	102	136	3-4"
146	146	124	115	117	156	4"
168	168	146	134	138	178	5"
178	178	156	144	148	193	5"
183	183	160	144	152	193	5"
194	194	178	165	167	208	6"
219	219	203	189	193	237	6-7"
245	245	220	206	210	260	6-8"
273	273	256	238	242	308	8"
325	325	297	280	285	355	8-10"
377	377	351	328	333	420	10-12"

Details:

 

 

Working range:
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.
 

 

 

Company profile:
Shandong Hengwang Group Co., Ltd. is a professional company engaged in research , development, production, sales, application and service of rock drill machines ,drilling tools,and pile driver machines.

 

 

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: Jining, Shandong.