Description:Name:Spiral Drill Collar
Material: AISI 4145H
Standard: API Spec 7-1 and SY/T5144
Port:Tianjin/Qingdao
Payment Terms:L/C
Packaging Details:As your request
Product detail:
| Product Information |
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Name:Spiral Drill Collar
Material: AISI 4145H
Standard: API Spec 7-1 and SY/T5144
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| Product Detail |
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The Spiral Drill Collar is made from AISI 4145H modified alloy steel, and completely meets the requirement of API Spec
7-1 and SY/T5144 Standard. It is a kind of drill collar which adds three dextrogyrate spiral groove on the outer circle of ordinary drill collar when processing, and the purpose is to reduce the area of contact and friction with the well wall,
which can effectively prevent the pressure sticking. The single weight of the spiral drill collar is round about 4% lighter
than the ordinary drill collar with the same specification, and the shape and thread of the both ends are the same with
the drill collar
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Model
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OD
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ID
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L mm
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DF mm
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BST
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mm
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in
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mm
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in
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NC23-31
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79.4
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3 1/8
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31.8
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1 1/4
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9150
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76.2
|
2.57:1
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NC26-35(2 3/8IF)
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88.9
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3 1/2
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38.1
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1 1/2
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9150
|
82.9
|
2.42:1
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|
NC31-41(2 7/8IF)
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104.8
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4 1/8
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50.8
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2
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9150
|
100.4
|
2.43:1
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|
NC35-47
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120.7
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4 3/4
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50.8
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2
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9150
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114.7
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2.58:1
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NC3850(3 1/2IF)
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127.0
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5
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57.2
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2 1/4
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9150
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121.0
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2.38:1
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NC44-60
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152.4
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6
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57.2
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2 1/4
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9150/9450
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144.5
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2.49:1
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NC44-62
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158.8
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6 1/4
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57.2
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2 1/4
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9150/9450
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149.2
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2.91:1
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NC46-62(4IF)
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158.8
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6 1/4
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71.4
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2 13/16
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9150/9450
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150.0
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2.63:1
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NC46-67(4IF)
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171.4
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6 3/4
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57.2
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2 1/4
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9150/9450
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159.5
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3.18:1
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NC50-67(4 1/2IF)
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171.4
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6 3/4
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71.4
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2 13/16
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9150/9450
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159.5
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2.37:1
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NC50-72(4 1/2IF)
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184.2
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7 1/4
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71.4
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2 13/16
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9150/9450
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169.5
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3.12:1
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NC50-77
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196.8
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7 3/4
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71.4
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2 13/16
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9150/9450
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185.3
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2.70:1
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NC50-80
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203.2
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8
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71.4
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2 13/16
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9150/9450
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190.1
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3.02:1
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6 5/8REG
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209.6
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8 1/4
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71.4
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2 13/16
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9150/9450
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195.7
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2.93:1
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NC61-90
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228.6
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9
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71.4
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2 13/16
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9150/9450
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212.7
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3.17:1
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7 5/8REG
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241.3
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9 1/2
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76.2
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3
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9150/9450
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223.8
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2.81:1
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NC70-100
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254.0
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10
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76.2
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3
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9150/9450
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237.3
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2.81:1
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8 5/8REG
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279.4
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11
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76.2
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3
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9150/9450
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266.7
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2.84:1
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