Dongying Oilman Machinery Equipment Co.,Ltd.
| Payment Terms | L/C, T/T, Western Union, MoneyGram |
| Supply Ability | 2000 pieces per month |
| Delivery Time | 30 work days |
| Packaging Details | In Bundles |
| Product Name | API 7-1 Oilfield Spiral Drill Collar And NMDC Non Magnetic Drill Collar |
| Keywords | Drill Collar |
| Application | Oil Drilling |
| Outer Diameter | 3 1/8" - 11" |
| Tool Joint | NC, IF, REG, FH |
| Hardbanding | Arnco 100XT, Arnco 300XT, BoTn 1000, BoTn 3000 |
| Brand Name | |
| Model Number | All types |
| Certification | API 7-1 |
| Place of Origin | China |
View Detail Information
Explore similar products
Oil Drilling Inside BOP Drop In Check Valve For Drill Stem Lower Safety Valves
Inside BOP Upper Lower Kelly Cock Valve For Drill String
Oil Well Downhole Float Valve Stabilizer ISO Standard Non Magnetic Tungsten
17 1/2" Drill String Components , forging Integral Blade Stabilizer
Product Specification
| Payment Terms | L/C, T/T, Western Union, MoneyGram | Supply Ability | 2000 pieces per month |
| Delivery Time | 30 work days | Packaging Details | In Bundles |
| Product Name | API 7-1 Oilfield Spiral Drill Collar And NMDC Non Magnetic Drill Collar | Keywords | Drill Collar |
| Application | Oil Drilling | Outer Diameter | 3 1/8" - 11" |
| Tool Joint | NC, IF, REG, FH | Hardbanding | Arnco 100XT, Arnco 300XT, BoTn 1000, BoTn 3000 |
| Brand Name | Model Number | All types | |
| Certification | API 7-1 | Place of Origin | China |
| High Light | NMDC Non Magnetic Drill Collar ，SY5411 Non Magnetic Drill Collar ，NC23 non mag drill collars | ||
API 7-1 Oilfield Spiral Drill Collar And NMDC Non Magnetic Drill Collar
Drill collars are extra-heavy integral tools used to concentrate weight onto the drill bit so as to produce sufficient force for the drill bit to break rock efficiently while drilling. They are made of AISI 4145H or 4145H modified steel and are connected between drill pipes and drill bits.
Our drill collar connections comply with dimensional requirements specified in API Spec 7-1. Drill collars also come with slip and elevator recesses for safe and efficient handling. Slip and elevator recesses can be used together or separately.
A. Slick Drill Collar
Note: Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. The Drill collar are manufactured strictly from API Spec7-1 and SY5411 standard.
B. Spiral Drill Collar
Note: Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure. The drill collars are manufactired strictly according to API Spec7-1 and Standard SY5144
C. Spiral Drill Collar With Elevator Groove And Slip Groove
Note: Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers’ requests.
D. Non-magnetic Drill Collar
The as cold rooled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress,corrosion,cracking and the mechanical performance is greatly enganced.
Hot sale API standard drill collar for oil well
| Size (in) | O.D (mm) | I.D. (mm) | Code | Thread | Length (mm) | Weight (kg) |
| 3 1/8 | 79.4 | 31.8(1-1/4) | NC23-31 | NC23 | 9140 | 298 |
| 3 1/2 | 88.9 | 38.1(1-1/2) | NC26-35 | NC26 | 9140 | 364 |
| 4 1/8 | 104.8 | 50.8(2) | NC31-41 | NC31 | 9140/9450 | 474/490 |
| 4 3/4 | 120.6 | 50.8(2) | NC35-47 | NC35 | 9140/9450 | 674/697 |
| 5 | 127 | 57.2(2-1/4) | NC38-50 | NC38 | 9140/9450 | 725/749 |
| 6 | 152.4 | 57.2(2-1/4) | NC44-60 | NC44 | 9140/9450 | 1125/1163 |
| 6 | 152.4 | 71.4(2-13/16) | NC44-60 | NC44 | 9140/9450 | 1022/1056 |
| 6 1/4 | 158.8 | 57.2(2-1/4) | NC44-62 | NC44 | 9140/9450 | 1237/1279 |
| 6 1/4 | 158.8 | 71.4(2-13/16) | NC46-62 | NC44 | 9140/9450 | 1134/1172 |
| 6 1/2 | 165.1 | 57.2(2-1/4) | NC46-65 | NC46 | 9140/9450 | 1352/1398 |
| 6 1/2 | 165.1 | 71.4(2-13/16) | NC46-65 | NC50 | 9140/9450 | 1249/1291 |
| 6 3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9450 | 1471/1521 |
| 7 | 177.8 | 57.2(2-1/4) | NC50-70 | NC50 | 9140/9450 | 1597/1651 |
| 7 | 177.8 | 71.4(2-13/16) | NC50-70 | NC50 | 9140/9450 | 1494/1545 |
| 7 1/4 | 184.2 | 71.4(2-13/16) | NC50-72 | NC50 | 9140/9450 | 1625/1680 |
| 7 3/4 | 196.8 | 71.4(2-13/16) | NC56-77 | NC56 | 9140/9450 | 1895/1960 |
| 8 | 203.2 | 71.4(2-13/16) | NC56-80 | NC56/6-5/8REG | 9140/9450 | 2040/2109 |
| 8 1/4 | 209.6 | 71.4(2-13/16) | 6-5/8REG | 6-5/8REG | 9140/9450 | 2188/2263 |
| 9 | 228.6 | 71.4(2-13/16) | NC61-90 | NC61 | 9140/9450 | 2658/2748 |
| 9 1/2 | 241.3 | 76.2(2-13/16) | 7-5/8REG | 7-5/8REG | 9140/9450 | 2954/3054 |
| 9 3/4 | 247.6 | 76.2(3) | NC70-97 | NC70 | 9140/9450 | 3127/3234 |
| 10 | 254 | 76.2(3) | NC70-100 | NC70 | 9140/9450 | 3308/3421 |
| 11 | 279.4 | 76.2(3) | 8-5/8REG | 8-5/8REG | 9140/9450 | 4072/4210 |
| ** Drill collar can be customized as per customer's design. | ||||||
Packaging & Shipping:
If any needs, pls contact us freely:
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
2017
Total Annual:
100,0000-1000,000
Employee Number:
10~50
Ecer Certification：
Verified Supplier
Machinery Equipment is manufacturer & stockiest of equipments, services and solutions to the upstream to downstream in oil & gas industry. We are aimed at helping customers to obtain the maximum from their each well, providing our customers superior quality at the best value for products... Machinery Equipment is manufacturer & stockiest of equipments, services and solutions to the upstream to downstream in oil & gas industry. We are aimed at helping customers to obtain the maximum from their each well, providing our customers superior quality at the best value for products...
Get in touch with us
Leave a Message, we will call you back quickly!