What are the available casing sizes?

Casing sizes range from 114mm to 406mm, including 114, 127, 140, 146, 178, 194, 219, 254, 273, 325, and 406mm, based on specific customer needs.

What is the lead time for orders?

During peak season, the lead time is one month. During off-season, it is within 15 workdays.

What certifications does the product have?

The product holds CE and ISO 9001:2015 certifications.

5 Inch 183mm Overburdon Concentric Casing System Symmetric Drilling Bit

Name: 5 Inch 183mm Overburdon Concentric Casing System Symmetric Drilling Bit
Brand: Zhejiang Sanrock Supply Management Co., Ltd.
SKU: 2046455025

Zhejiang, ChinaZhejiang Sanrock Supply Management Co., Ltd.

US$846.40-866.20

1 Piece

Product profile

After-sales Service

Online Technical Services

Warranty

Online Technical Services

Certification

CE, ISO 9001:2015

Model NO.

183mm-Concentric Casing system

Standard

AISI, JIS

Surface Treatment

Spray-Paint

Manufacturing Process

Forging

Material

Tungsten Carbide, Alloy Steel

Shank

DHD, Ql, SD, Mission

Bit Diameter{Button Lncluded}

160mm

Casing Shoe I.D

152mm

Casing Tube O.D

183 mm

Maximum Reaming O.D

198mm

Application

Coal Mining,Quarry Drilling ,Construction Works

Formation

Soft,Medium and Hard Formation

Different Structures

Concentric System with Ring Bits, Wing and Blocks

Hammer Size

4", 5", 6", 8", 10", 12"

Casing Size

114/ 127/140/146/178/194/219/254/273/325mm

Advantage

High Performance

Transport Package

with Wooden Case Outside, or as Per Your Request

Trademark

SANROCK

Origin

Zhejiang, China

Production Capacity

8000pieces/Month

Key features

Concentric Drilling System: Drills and cases hole simultaneously in unstable ground conditions.

High Penetration Rate: Full face head design with ring bit significantly improves drilling speed.

Versatile Formation Handling: Suitable for soft, medium, and hard formations including coal mining.

Wide Casing Size Range: Supports casing sizes from 114mm to 406mm based on customer needs.

Diverse Shank Options: Compatible with DHD, QL, SD, and Mission shank types.

Strict Quality Control: Experienced QC team performs strict inspection before shipping.

Multiple Payment Methods: Accepts Credit Card, TT, Western Union, LC, and PayPal.

Global Shipping Options: Sea, land, or express courier (DHL, UPS, Fedex) available.

Company profile

High Repeat Buyers ChoiceImporters and ExportersFull CustomizationFlexible Customization

Zhejiang Sanrock Supply Management Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2020-10-16Nearest Port: ningbo, qingdaoAverage Response Time: ≤2.49hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, FAS, CIP, CPT

AI-Powered supplier vetting

SummaryZhejiang Sanrock Supply Management Co., Ltd. is a China-based limited company identified as both a trading company and manufacturer/factory, offering mining machinery and related mechanical and electronic equipment. It reports strong export orientation, with 90% of total sales from exports, self-operated import/export rights, and five years of export experience. Customization is available across sample-based, design-based, full, minor, and flexible formats. However, the supplier is not identified as a professional technical supplier and does not provide 3D software design services. Evidence is insufficient for certification holding, financial credibility, production capacity, and customer cases. Service procedures for supplier approval, corrective actions, and complaint handling exist but lack written records; inventory, overseas warehouse, and overseas showroom capabilities are explicitly absent.

Supplier typeThe supplier is a limited company in Zhejiang, China, classified as both a trading company and manufacturer/factory. Its stated scope covers mining machinery, mechanical equipment, electronic products, supply-chain services, warehousing, and consulting activities.

After-Sales capabilityThe supplier has procedures for handling customer complaints and corrective/preventive actions, but no written records are available. It also explicitly lacks in-stock service capacity, overseas warehouse capability, and overseas showroom capability, while the effectiveness of after-sales execution is not demonstrated.

R&D capabilityThe supplier is explicitly not a professional technical supplier and does not provide 3D software design services. Although it offers several customization formats, the records do not establish research, development, or advanced innovation capability.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This provides direct evidence of broad customization service capability, although it does not establish 3D design support.

Product Q&A

Q:What applications is this system suitable for?

It is suitable for drilling water wells, geothermal wells, construction works, coal mining, quarry drilling, and foundation work in soft, medium, and hard formations.

Q:How does the drilling system work?

The system consists of a central pilot bit, casing shoe, and symmetrical ring bit. The pilot bit guides the drill string while the ring bit and casing shoe assembly are welded to the casing prior to drilling.

Q:What payment methods do you accept?

You can pay by credit card, TT, Western Union, LC, PayPal, Small-amount payment, or Money Gram.

Q:How is the shipment handled?

Large or heavy products are shipped by sea or land. Small and delicate products are shipped via DHL, UPS, Fedex, or TNT. You can also appoint your preferred shipping method.

Q:What is your quality control process?

We have an experienced QC team that performs strict inspection and testing for every order before shipping out.