There are 38 API drill collars from 18 suppliers on EC21.com
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Usage:Drill collars are used to provide weight on bit so that drill pipes are kept in tension. Especially drill collars can keep drill bits centralized and hole track by large rigidity
Material: AISI 4145H, 4145H Mod and Non-magnetic material.
Standard:API Spec7, API Spec7-1 and SY/T Standard.ALSO WE CAN SUPPLY DS-1 and NS-1 STANDARD.
Type:Slick drill collar
Spiral drill collar
Non-magnetic material.
Hard band: Arnco100XT, Arnco200XT and Arnco300XT; Botn1000, Botn3000, TCS8000, TCS-Titanium, Armacor M etc. Also we can make according to customers’ requirements.
Size:OD: 3 1/8”~~11”; ID: 1 1/2”Min. Length:10’~~31’
Detail specification
|
Standard size ,bores and connection for Drill Collar |
|||||||
|
Style of connection |
OD |
ID |
Length |
Bevel |
Bending strength Ratio |
||
|
mm |
in |
mm |
in |
mm |
diameter mm |
||
|
NC23-31 |
79.4 |
3 1/8 |
31.8 |
1 1/4 |
9150 |
76.2 |
2.57:1 |
|
NC26-35(23/8IF) |
88.9 |
3 1/2 |
38.1 |
1 1/2 |
9150 |
82.9 |
2.42:1 |
|
NC31-41(27/8IF) |
104.8 |
4 1/8 |
50.8 |
2 |
9150 |
100.4 |
2.43:1 |
|
NC35-47 |
120.7 |
4 3/4 |
50.8 |
2 |
9150 |
114.7 |
2.58:1 |
|
NC3850(31/2IF) |
127.0 |
5 |
57.2 |
2 1/4 |
9150 |
121.0 |
2.38:1 |
|
NC44-60 |
152.4 |
6 |
57.2 |
2 1/4 |
9150or9450 |
144.5 |
2.49:1 |
|
NC44-62 |
158.8 |
6 1/4 |
57.2 |
2 1/4 |
9150or9450 |
149.2 |
2.91:1 |
|
NC46-62(4IF) |
158.8 |
6 1/4 |
71.4 |
2 13/16 |
9150or9450 |
150.0 |
2.63:1 |
|
NC46-65(4IF) |
165.1 |
6 1/2 |
57.2 |
2 1/4 |
9150or9450 |
154.8 |
2.76:1 |
|
NC46-65(4IF) |
165.1 |
6 1/2 |
71.4 |
2 13/16 |
9150or9450 |
154.8 |
3.05:1 |
|
NC46-67(4IF) |
171.4 |
6 3/4 |
57.2 |
2 1/4 |
9150or9450 |
159.5 |
3.18:1 |
|
NC50-67(41/2IF) |
171.4 |
6 3/4 |
71.4 |
2 13/16 |
9150or9450 |
159.5 |
2.37:1 |
|
NC50-70(41/2IF) |
177.8 |
7 |
57.2 |
2 1/4 |
9150or9450 |
164.7 |
2.54:1 |
|
NC50-70(41/2IF) |
177.8 |
7 |
71.4 |
2 13/16 |
9150or9450 |
164.7 |
2.73:1 |
|
NC50-72(41/2IF) |
184.2 |
7 1/4 |
71.4 |
2 13/16 |
9150or9450 |
169.5 |
3.12:1 |
|
NC50-77 |
196.8 |
7 3/4 |
71.4 |
2 13/16 |
9150or9450 |
185.3 |
2.70:1 |
|
NC50-80 |
203.2 |
8 |
71.4 |
2 13/16 |
9150or9450 |
190.1 |
3.02:1 |
|
6 5/8REG |
209.6 |
8 1/4 |
71.4 |
2 13/16 |
9150or9450 |
195.7 |
2.93:1 |
|
NC61-90 |
228.6 |
9 |
71.4 |
2 13/16 |
9150or9450 |
212.7 |
3.17:1 |
|
7 5/8REG |
241.3 |
9 1/2 |
76.2 |
3 |
9150or9450 |
223.8 |
2.81:1 |
|
NC70-97 |
247.6 |
9 3/4 |
76.2 |
3 |
9150or9450 |
232.6 |
2.57:1 |
|
NC70-100 |
254.0 |
10 |
76.2 |
3 |
9150or9450 |
237.3 |
2.81:1 |
|
8 5/8REG |
279.4 |
11 |
76.2 |
3 |
9150or9450 |
266.7 |
2.84:1
|
|
Mechanical Property of Drill Collar |
||||||
|
OD |
Yield Strength |
Tensile Strength |
Elongation |
Brinell Hardness HB |
Charpy |
|
|
mm |
in inch |
σ 0.2 Mpa |
σ b Mpa |
4% |
AKVJ |
|
|
79.4-171.4 |
3 1/8-6 3/4 |
≥758 |
≥965 |
≥13 |
285-341 |
≥54 |
|
177.8-279.4 |
7-11 |
≥689 |
≥930 |
|||
|
Stress Relief Groove for Thread Connection |
|||||
|
Style of Connection |
Length between Inner Thread Shoulder and the last Dens |
Diameter of Inner Thread |
Taper of the Hole nest to inner Thread |
Outer Thread Diameter |
Length between alternative Inner Thread Shoulder and Stress Relief Groove |
|
±1.59mm |
Dcb+0.40,-0 |
±20.83 |
DRG+0 -0.79 |
LRG +0 -3.18 |
|
|
mm |
mm/m |
mm |
mm |
||
|
NC35 |
82.6 |
82.15 |
166.67 |
82.15 |
85.73 |
|
NC38(3 1/2IF) |
88.9 |
88.11 |
166.67 |
89.3 |
92.08 |
|
NC44 |
101.6 |
101.6 |
166.67 |
106.36 |
104.78 |
|
NC46(4IF) |
101.6 |
106.76 |
166.67 |
109.93 |
104.78 |
|
NC50(4 1/2IF) |
101.6 |
117.48 |
166.67 |
120.65 |
104.78 |
|
NC56 |
114.3 |
121.84 |
250 |
134.14 |
117.48 |
|
NC61 |
127 |
132.95 |
250 |
149.25 |
130.18 |
|
NC70 |
139.7 |
152 |
250 |
171.05 |
142.88 |
|
6 5/8REG |
114.3 |
134.14 |
166.67 |
137.72 |
117.48 |
|
7 5/8REG |
120.7 |
133.35 |
250 |
162.72 |
123.83 |
|
8 5/8REG |
123.8 |
149.25 |
250 |
184.94 |
127 |
|
Note: The connection of NC23、26、31 and 2 3/8IF are without stress relief groove mould for their thin wall. |
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Package:
1.Standard Senwell export package
2.Requested by customers
Our Services:
1.High quality products with favorable price at right delivery
2.Customized products
3.Warranty
When enquiry, please kindly advise below:
1.Size: as above chart
2.Connection
3.Quantity
4.Port of destination if you need CNF or CIF price
5.Your ideal delivery date if you need the goods urgently
Company Profile
Shaanxi Senwell Drilling Equipment Co., Ltd. (SENWELL) is a comprehensive corporation, of which the business scope is manufacture, trade and sale. SENWELL is located in the center of the high development district which is in the east of Xi'an, Shaanxi Province. Supported by abundant technology resources of the high development district, our company is engaged in designing, researching & developing, testing and manufacturing oilfield equipment and providing relative services.
| Registration Date | 2014/05/07(Year/Month/Date) |
|---|---|
| Buyer / Seller in EC21 | Seller |
| Business Type | Trading Company |
| Year established | 2008 |
| Employees total | 11 - 50 |
| Annual revenue | USD 1,000,001 - 2,000,000 |
| Company | Shaanxi Senwell Drlling Equipment Co., Ltd |
|---|---|
| Address | No.11 Tangyan South Road, High-Tech District,Xi'an,Shaanxi China XianShanxii710065China |
| Phone | 86 - 29 - 85370919 |
| Fax | 86 - 29 - 85370919 |
| Homepage | http://www.oiltoolsdp.com |
| Contact | sara wang |