| Customization: | Available |
|---|---|
| After-sales Service: | 12 Months |
| Warranty: | 12 Months |
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Heat Treatment of drill collar adopts unique medium frequency inductance heating method for hardening and tempering,during which steel parts rotate continuously to get even heating.In the course of hardening,it adopts anular internal and external injection water cooling method to get even and high strength.Drilling collar material after whole length heat treatment could guarantee 285-341 Brinell hardness 1" below the surface of the pipe body.
Drill collar includes open faced,spiral groove,square,lopsided and pipe slips,elevator groove,wearing ring drill collar.The length of the drill collar could be 10 feet to 30 feet with 3-1/20'' to 11" external diameter.Data information of common size
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.
Technical specification and parameters
|
Drill Collar Number |
O.D |
I.D |
Length |
Bevel Diameter |
Refbend g Strength ratio |
||
|
mm |
in |
mm |
in |
||||
|
NC23-31 |
79.4 |
3 1/8 |
31.8 |
1 1/2 |
9150 |
76.2 |
2.57:1 |
|
NC26-35(2 3/8 IF) |
88.9 |
3 1/2 |
38.1 |
1 1/2 |
9150 |
82.9 |
2.42:1 |
|
NC31-41(2 7/8 IF) |
104.8 |
4 1/8 |
50.8 |
2 |
9150 |
100.4 |
2.43:1 |
|
NC35-47 |
120.6 |
4 3/4 |
50.8 |
2 |
9150 |
114.7 |
2.58:1 |
|
NC38-50(3 1/2 IF) |
127.0 |
5 |
57.2 |
2 1/4 |
9150 |
121.0 |
2.38:1 |
|
NC44-60 |
152.4 |
6 |
57.2 |
2 1/4 |
9150&9450 |
144.5 |
2.49:1 |
|
NC44-60 |
152.4 |
6 |
71.4 |
2 13/16 |
9150&9450 |
144.5 |
2.84:1 |
|
NC44-62 |
158.8 |
6 1/4 |
57.2 |
2 1/4 |
9150&9450 |
149.2 |
2.91:1 |
|
NC46-62(4IF) |
158.8 |
6 1/4 |
71.4 |
2 13/16 |
9150&9450 |
150.0 |
2.63:1 |
|
NC46-65(4IF) |
165.1 |
6 1/2 |
57.2 |
2 1/4 |
9150&9450 |
154.8 |
2.76:1 |
|
NC46-65(4IF) |
165.1 |
6 1/2 |
71.4 |
2 13/16 |
9150&9450 |
154.8 |
3.05:1 |
|
NC46-67(4IF) |
171.4 |
6 3/4 |
57.2 |
2 1/4 |
9150&9450 |
159.5 |
3.18:1 |
|
N50-67(4 1/2 IF) |
171.4 |
6 3/4 |
71.4 |
2 13/16 |
9150&9450 |
159.5 |
2.37:1 |
|
NC50-70(4 1/2 IF) |
177.8 |
7 |
57.2 |
2 1/4 |
9150&9450 |
164.7 |
2.54:1 |
|
NC50-70(4 1/2 IF) |
177.8 |
7 |
71.4 |
2 13/16 |
9150&9450 |
164.7 |
2.73:1 |
|
NC50-72(4 1/2 IF) |
184.2 |
7 1/4 |
71.4 |
2 13/16 |
9150&9450 |
169.5 |
3.12:1 |
|
NC56-77 |
196.8 |
7 3/4 |
71.4 |
2 13/16 |
9150&9450 |
185.3 |
2.70:1 |
|
NC56-80 |
203.2 |
8 |
71.4 |
2 13/16 |
9150&9450 |
190.1 |
3.02:1 |
|
6 5/8 REG |
209.6 |
8 1/4 |
71.4 |
2 13/16 |
9150&9450 |
195.7 |
2.93:1 |
|
NC61-90 |
228.6 |
9 |
71.4 |
2 13/16 |
9150&9450 |
212.6 |
3.17:1 |
|
7 5/8 REG |
241.3 |
9 1/2 |
76.2 |
3 |
9150&9450 |
223.8 |
2.81:1 |
|
NC70-97 |
247.6 |
9 3/4 |
76.2 |
3 |
9150&9450 |
232.8 |
2.57:1 |
|
NC70-100 |
254 |
10 |
76.2 |
3 |
9150&9450 |
237.3 |
2.81:1 |
|
8 5/8 REG |
279.4 |
11 |
76.2 |
3 |
266.7 |
2.84:1 |
|
Advantages of Drill Collar Production Process
In the process of heat treatment, the drill collar has added a special normalizing process, which makes the thread part grain more refined, enhances the drill collar thread strength, and effectively improves the service life of the drill collar.
Sreel Mark |
Chemical Composition % |
||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Al |
|
|
4145H |
0.42~0.48 |
0.15~0.35 |
0.90~1.20 |
≤0.03 |
≤0.03 |
0.90~1.20 |
0.15~0.25 |
≤0.2 |
0.025~0.045 |
|
Other Elements:N≤0.015,Ni≤0.5 |
|||||||||
|
Drill Collar Mechanical Performance |
||||||||
|
Drill Collar Outside Diameter Range |
Yield Strength |
Tensile Strength |
Elongation |
|
Charpy Impact |
|||
|
mm |
in |
MPa |
Psi |
MPa |
Psi |
|||
|
79.4~171.4 |
3-1/8~6-3/4 |
≥758 |
≥110000 |
≥965 |
≥140000 |
≥13 |
285~341 |
≥54 |
|
177.8~279.4 |
7~11 |
≥689 |
≥100000 |
≥930 |
≥135000 |
≥13 |
285~341 |
≥54 |
|
Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand |
||||||||
1) About Packing
Inner packing: white box, color boxes (upon request), Outer packing: cartons or pallets
2) Terms of payment:
We accept T/T,L/C
3)Terms of Shipment:
About 30 days after receiving the advance payment,or according to both parties agreement
4)Ports of shipment:
Tianjin,Qingdao, shanghai or other required Port, by sea or air
5)Guarantee:
One year since delivery.
6)Inspection:
100% testing before delivery.
Shandong Yacheng Petroleum Technology Co.,Ltd.(YCPT) is located in the second largest oilfield in Dongying city. We are the subsidiary of Xincheng Petroleum of Xincheng Petroleum Group,which was founded since 2003. We are first class supplier in vendor list of CNPC,and CNOOC,and member of CCOIC, CCPIT and so on.
We have 19 years of experience in research,development and manufacturing of oil drilling equipment and drilling string, We have professional sales and after-sales service teams We are committed to develop, manufacture and supply of oilfield equipment, like oil and gas Gate Valve, Mud Pump and Spare Parts, Handling Tools,Drilling String, Well Control Equipments.
We have established a complete quality control system, all products & equipment manufactured as per international standard ISO 9001 and API standard. Based on our talented experienced technician team and sincerely marketing strategy, we have exported our products to more than 30 countries. The positive feedback from our clients are encouraging us to do much better and more strict on self-requirement. We will continue to provide quality products with favorable prices to all customers!
Welcome to Dongying city and visit our company. Let's open the delightful business cooperation!
1. who are we?
We are based in Shandong Province, China, start from 2016,sell to Eastern Europe(17.00%),Mid East(16.00%),Southeast Asia(16.00%),South America(15.00%),North America(14.00%),Eastern Asia(10.00%),Western Europe(8.00%),Oceania(2.00%),Africa(2.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
API 6A Gate Valve / Mud Pump Spare Parts / Handling Tools / Drilling String / API 16A Well Control Equipments
4. why should you buy from us not from other suppliers?
we have been exporting drill pipe, handing tools,mud pump parts and well control equipments to well-known oil service companies in the world .
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,CIP,FCA,CPT,Express Delivery;
Accepted Payment Currency:null;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash;
Language Spoken:English,Chinese,Russian.
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