API Drilling Collar of Downhole Drilling Equipment
1. Quick detail:
A. Material:AISI 4145H Modified Alloy steel, Non-mag Material
B. Size: 3-1/8"-11"
C. Inspection&Test: When producing, traceability are maintained from the receipt of raw material to completion of final products, and serial numbers are die-stamped on each workpiece body. During each manufacturing process, inspection and test are performed.
D. Main Market:Middle East, North America, Europe
E. Export Percentage: 95%
F. Supply Ability: 1000 sets per month
2. Goods Description:
Drill collars are manufactured strictly according to API Spec7-1 standard with material of AISI 4145 Mod. Kingwell supplies slick drill collars, spiral drill collars and non-magnetic drill collars etc. The size of drill collar Kingwell is from 3-1/8 to 11 inches. Besides models listed in the table below, other drill collars at customers' specific request can be available.
API Drilling Collar Detail:
3. Drilling Collar Technical parameter
Drill Collar Model | D | d | L(mm) | DF(mm) | Bending Strength ratio | Drill Collar | ||
mm | In | mm | in | |||||
QW-DC3-1/8 | 79.4 | 3-1/8 | 31.8 | 1-1/2 | 9,150 | 76.2 | 2.57:1 | NC23-31 |
QW-DC 3-1/2 | 88.9 | 3-1/2 | 38.1 | 1-1/2 | 9,150 | 82.9 | 2.42:1 | NC26-35(2-3/8IF) |
QW-DC 4-1/8 | 104.8 | 4-1/8 | 50.8 | 2 | 9,150 | 100.4 | 2.43:1 | NC31-41(2-7/8IF) |
QW-DC 4-3/4 | 120.7 | 4-3/4 | 50.8 | 2 | 9,150 | 114.7 | 2.58:1 | NC35-47 |
QW-DC 5 | 127 | 5 | 57.2 | 2-1/4 | 9,150 | 121 | 2.38:1 | NC38-50(3-1/2IF) |
QW-DC 6A | 152.4 | 6 | 57.2 | 2-1/4 | 9,150/9,450 | 144.5 | 2.49:1 | NC44-60 |
QW-DC 6B | 152.4 | 6 | 71.4 | 2-13/16 | 9,150/9450 | 144.5 | 2.84:1 | NC44-60 |
QW-DC 6-1/4A | 158.8 | 6-1/4 | 57.2 | 2-1/4 | 9,150/9,450 | 149.2 | 2.91:1 | NC44-62 |
QW-DC 6-1/4B | 158.8 | 6-1/4 | 71.4 | 2-13/16 | 9,150/9,450 | 150 | 2.63:1 | NC46-62(4IF) |
QW-DC 6-1/2A | 165.1 | 6-1/2 | 57.2 | 2-1/4 | 9,150/9,450 | 154.8 | 2.76:1 | NC46-65(4IF) |
QW-DC 6-1/2B | 165.1 | 6-1/2 | 71.4 | 2-13/16 | 9,150/9,450 | 154.8 | 3.05:1 | NC46-65(4IF) |
QW-DC 6-3/4A | 171.4 | 6-3/4 | 57.2 | 2-1/4 | 9,150/9,450 | 159.5 | 3.18:1 | NC46-67(4IF) |
QW-DC 6-3/4B | 171.4 | 6-3/4 | 71.4 | 2-13/16 | 9,150/9,450 | 159.5 | 2.37:1 | NC50-67(4-1/2IF) |
QW-DC 7A | 177.8 | 7 | 57.2 | 2-1/4 | 9,150/9,450 | 164.7 | 2.54:1 | NC50-70(4-1/2IF) |
QW-DC 7B | 177.8 | 7 | 71.4 | 2-13/16 | 9,150/9,450 | 164.7 | 2.73:1 | NC50-70(4-1/2IF) |
QW-DC 7-1/4 | 184.2 | 7-1/4 | 71.4 | 2-13/16 | 9,150/9,450 | 169.5 | 3.12:1 | NC50-72(4-1/2IF) |
QW-DC 7-3/4 | 196.8 | 7-3/4 | 71.4 | 2-13/16 | 9,150/9,450 | 185.3 | 2.70:1 | NC56-77 |
QW-DC 8 | 203.2 | 8 | 71.4 | 2-13/16 | 9,150/9,450 | 190.1 | 3.02:1 | NC56-80 |
QW-DC 8-1/4 | 209.6 | 8-1/4 | 71.4 | 2-13/16 | 9,150/9,450 | 195.7 | 2.93:1 | 6-5/8REG |
QW-DC 9 | 228.6 | 9 | 71.4 | 2-13/16 | 9,150/9,450 | 212.7 | 3.17:1 | NC61-90 |
QW-DC 9-1/2 | 241.3 | 9-1/2 | 76.2 | 3 | 9,150/9,450 | 223.8 | 2.81:1 | 7-5/8REG |
QW-DC 9-3/4 | 247.6 | 9-3/4 | 76.2 | 3 | 9,150/9,450 | 232.6 | 2.57:1 | NC70-97 |
QW-DC 10 | 254 | 10 | 76.2 | 3 | 9,150/9,450 | 237.3 | 2.81:1 | NC70-100 |
QW-DC 11 | 279.4 | 11 | 76.2 | 3 | 9,150/9,450 | 266.7 | 2.84:1 | 8-5/8 REG |
Xi'an Kingwell Oilfield Machinery Co.,Ltd is a highly reputable supplier for oilfield equipment and services to Oil & Gas industries and provide complete solutions.
With over 10 years developing, we were developed from the beginning drilling service to manufacture factory who produce OCTG, DST tools and Solid Control products.
KINGWELL have experienced team, stronger enough to meet any challenge, we do believe honest is the base of business and cooperation, our aim is to build solid relationship with any part of honest. kingwell can provide highly efficient services to its clients resulting in accurate and timely deliveries at the best prices.
It is a professional supplier for oilfield products according to the API standard. We exporting ALL KINDS OF OILFIELD MACHINERY AND TOOLS with super Quality and Competitive Price in CHINA.
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