
444.5mm 17 1/2 inch steel tooth rotary drag bit,Three Wing Scraper Step Drag Bits for Soft Formation
Application
17 1/2 inch steel tooth rotary drag bit is mainly used for water wells, mining, geothermal, environmental and exploration drilling. It is suitable for drilling in soft and soft-medium formations with fast penetration rate and high efficiency, and special for the large diameter holes’ drilling.
The cutting structure is force balanced,non-symmetrical blade and deep junk slots are designed to dramatically improve ROP of the bit.Matrix material of the bit adopts high quality steel and wear-resistance material with high performance is build-up welded on the surface of blades to prevent material from eroding.
Types: Ordinary type; Reinforced type; Super strength type.
Threads: Any female or male threads.
Characteristics
All sizes are generally 3 wings and standard design;
Any size of 4 wings or chevron type is upon customer’s request;
All sizes connection type are AROD,NROD or standard API thread;
Any special size and design is upon customer’s request.
Drag bits diameter:76mm to 445mm;
Step Drag Drill Bits thread sizes: :2 3/8” API Reg, 3 1/2” API Reg,
4 1/2” API Reg, 6 5/8” API Reg, etc;
Keywords:clay cutter,drag bits,drag bit,drag bits for water well drilling,step type drag bits,chevron drag bit,step drag bits,chevron drill bits,chevron drag bit,water well drilling bits
Specification
No. | Bit Diameter | Bit Design | Type | Part No |
inch | mm | Step / Chevron | ||
1 | 2 1/2〞 | 64 | S/C | DB212S/DB212C |
2 | 2 3/4〞 | 70 | S/C | DB234S/DB234C |
3 | 2 15/16〞 | 75 | S/C | DB21516S/DB21516C |
4 | 3〞 | 76 | S/C | DB3S/DB3C |
5 | 3 1/8〞 | 79 | S/C | DB318S/DB318C |
6 | 3 1/4〞 | 83 | S/C | DB314S/DB314C |
7 | 3 1/2〞 | 89 | S/C | DB312S/DB312C |
8 | 3 5/8〞 | 92 | S/C | DB358S/DB358C |
9 | 3 3/4〞 | 95 | S/C | DB334S/DB334C |
10 | 3 7/8〞 | 98 | S/C | DB378S/DB378C |
11 | 4〞 | 102 | S/C | DB4S/DB4C |
12 | 4 1/8〞 | 105 | S/C | DB418S/DB418C |
13 | 4 1/4〞 | 108 | S/C | DB414S/DB414C |
14 | 4 1/2〞 | 114 | S/C | DB412S/DB412C |
15 | 4 5/8〞 | 117 | S/C | DB458S/DB458C |
16 | 4 3/4〞 | 121 | S/C | DB434S/DB434C |
17 | 4 7/8〞 | 124 | S/C | DB478S/DB478C |
18 | 5〞 | 127 | S/C | DB5S/DB5C |
19 | 5 1/8〞 | 130 | S/C | DB518S/DB518C |
20 | 5 1/4〞 | 133 | S/C | DB514S/DB514C |
21 | 5 1/2〞 | 140 | S/C | DB512S/DB512C |
22 | 5 5/8〞 | 143 | S/C | DB558S/DB558C |
23 | 5 3/4〞 | 146 | S/C | DB534S/DB534C |
24 | 5 7/8〞 | 149 | S/C | DB578S/DB578C |
25 | 6〞 | 152 | S/C | DB6S/DB6C |
26 | 6 1/8〞 | 156 | S | DB618S |
27 | 6 1/4〞 | 159 | S | DB614S |
28 | 6 1/2〞 | 165 | S | DB612S |
29 | 6 5/8〞 | 168 | S | DB658S |
30 | 6 3/4〞 | 171 | S | DB634S |
31 | 6 7/8〞 | 175 | S | DB678S |
32 | 7〞 | 178 | S | DB7S |
33 | 7 1/8〞 | 181 | S | DB718S |
34 | 7 1/4〞 | 184 | S | DB714S |
35 | 7 1/2〞 | 191 | S | DB712S |
36 | 7 5/8〞 | 194 | S | DB758S |
37 | 7 3/4〞 | 197 | S | DB734S |
38 | 7 7/8〞 | 200 | S | DB778S |
39 | 8〞 | 203 | S | DB8S |
40 | 8 1/8〞 | 206 | S | DB818S |
41 | 8 1/4〞 | 210 | S | DB814S |
42 | 8 1/2〞 | 216 | S | DB812S |
43 | 8 5/8〞 | 219 | S | DB858S |
44 | 8 3/4〞 | 222 | S | DB834S |
45 | 8 7/8〞 | 225 | S | DB878S |
46 | 9〞 | 229 | S | DB9S |
47 | 9 1/8〞 | 232 | S | DB918S |
48 | 9 1/4〞 | 235 | S | DB914S |
49 | 9 1/2〞 | 241 | S | DB912S |
50 | 9 5/8〞 | 244 | S | DB958S |
51 | 9 3/4〞 | 248 | S | DB934S |
52 | 9 7/8〞 | 251 | S | DB978 |
53 | 10〞 | 254 | S | DB10S |
54 | 12〞 | 305 | S | DB12S |
55 | 12 1/4〞 | 311 | S | DB1214S |
56 | 15〞 | 381 | S | DB15S |
57 | 17 1/2〞 | 445 | S | DB1712S |
Packing& Delivery
Service
In our after sales service system, We establish perfect control system strictly according to ISO-9000 series, in this system, technology date and problem solve solution and preventive measures will be provided in any maintain project, all the spare parts will be used in new OEM products with installation instructions, packing list, manufacturer's instruction, qualification and Warranty certificate.
We provide "one equipment & one case, endless service, namely
the after sales service begin from the order confirmation, last for
the working life of the equipment.
Beijing Jincheng Mining Technology Co., Ltd.
Beijing Jincheng Mining Technology Co., Ltd. (JCDRILL) is located in Beijing, China. For more than 20 years, we have specialized in the research, development, and production of rock blasting drilling rigs, water well drilling rigs, diamond core drilling rigs, anchor drilling rigs, and related accessories & drilling services. With our advanced technology, high-quality equipment, rigorous testing processes, and comprehensive service network, we consistently provide professional drilling solutions to our customers. These strengths have helped establish the “JCDRILL” brand as a trusted name in the market. Currently, JCDRILL products account for 50% of the domestic market and are exported to more than 40 countries. In November 2002, we were awarded ISO9001:2000 certification.
Our manufacturing facilities, covering an area of 9,625 square meters, specialize in the production of rock blasting drilling rigs, water well drilling rigs, diamond core drilling rigs, anchor drilling rigs, and related accessories. We employ more than 500 staff, including 26 experienced engineers from Ingersoll Rand and the former Xuanhua Mining Machinery Company. With our strong technological expertise and robust market service capabilities, we have developed both an efficient marketing system and an excellent service support system, earning the trust of customers worldwide.
Additionally, we serve as an authorized agent for mobile double-screw air compressors from Atlas Copco, Sullair, and Liutech. This allows us to offer drilling rig users high-quality, professional air compressor solutions along with reliable after-sales services.
At JCDRILL, we are committed to our strategic vision: “Survival by Quality, Development by Credit.” We strive to provide users with high-quality drilling solutions. Our after-sales service system follows a strict control framework based on ISO-9000 standards. This system ensures that technical data, problem-solving solutions, and preventive measures are provided for every maintenance project. All spare parts are sourced from new OEM products and come with installation instructions, packing lists, manufacturer documentation, qualification certificates, and warranty certificates.
We uphold the principle of “One Equipment, One Case, Endless Service”—our after-sales support begins from the moment an order is confirmed and lasts throughout the equipment’s entire operational life.