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API Heavy well drill pipe
API Heavy well drill pipe
Supplier Info
[China Supplier]
Contact Person : Ms. Wu Edwina
Tel : 86-772-3133116,13607801851
Fax : 86-772-3133116
Product Detail
1. OD: 2 3/8''-5'' (50-127mm) 2. API 5DP/ISO9001: 2008 3. Grade: G105 S135 E75 X95 R780 4. Length: R1 R2 5. LOWEST PRICE

 API Drill pipe

Features

1. The drill collar is according to SY/T5144-1997 and API 7-1 " Specification for Rotary Drill Stem Elements" standard.

2. The material uses AISI 4145H alloy structural steel to carry on the deep hole processing, before thread and spiral groove processing against the total cross-section to quenching and the tempering heat treatment. After thread examination qualified, and carries on cold rolling processing to the thread root and the slips, reduces the thread part fatigue failure to increase the drill collar service life. 

3. Our API drill pipes are of high physical property, for their strictly controlled processing of sulphur and phosphorus.

4. To ensure the materials to meet even surpass the requirements of API Specification, heat treatment is on the basis of the actual chemical analysis of each heat of steel. Strict full-length inspection especially on the weld-neck region ensures the drill pipes are of no defects.

5. All threads are machined by CNC Lathes and inspected with API Spec standard thread gauges. To improve the galling-resistance during initial break-in and drilling operation, all threads are also phosphated or coppered, and all the roots are cold rolled. The products shall be equipped with pressed steel or plastic steel thread protectors on the connections.

Specificaions

Drill collar dimension Specifications
ThreadtypeD/ODD/IDL mmTaiwan shoulderchamfer diameterReference bending strength ratio
mminmminDF mm
NC23-3179.43 1/831.81 1/4915076.22.57:1
NC26-35(2 3/8IF)88.93 1/238.11 1/2915082.92.42:1
NC31-41(2 7/8IF)104.84 1/850.829150or9450100.42.43:1
NC35-47120.74 3/450.829150or9450114.72.58:1
NC38-50(3 1/2IF)127.05   57.22 1/49150or9450121.02.38:1
NC44-60152.46   57.22 1/49150or9450144.52.49:1
NC44-62158.86 1/457.22 1/49150or9450149.22.91:1
NC46-62(4IF)158.86 1/457.22 13/169150or9450150.02.63:1
NC46-65(4IF)165.16 1/271.42 1/49150or9450154.82.76:1
NC46-65(4IF)165.16 1/257.22 13/169150or9450154.83.05:1
NC46-67(4IF)171.46 3/471.42 1/49150or9450159.53.18:1
NC50-67(4 1/2IF)171.46 3/457.22 13/169150or9450159.52.37:1
NC50-70(4 1/2IF)177.87   71.42 1/49150or9450164.72.54:1
NC50-70(4 1/2IF)177.87   57.22 13/169150or9450164.72.73:1
NC50-72(4 1/2IF)184.27 1/471.42 13/169150or9450169.53.12:1
NC50-77196.87 3/471.42 13/169150or9450185.32.70:1
NC50-80203.28   71.42 13/169150or9450190.13.02:1
6 5/8REG209.68 1/471.42 13/169150or9450195.62.93:1
NC61-90228.69   71.42 13/169150or9450212.73.17:1
7 5/8REG241.39 1/276.23     9150or9450223.82.81:1
NC70-97247.69 3/476.23     9150or9450232.62.57:1
NC70-100254.01076.23     9150or9450237.32.81:1
AB Type Drill collar mechanical properties
OD scopeYield strength Mpa Tensile strength MpaElongation %Brinell hardness HBCharpy impact J
mmin
79.4-174.63 1/8-6 7/8≥758≥965≥13≥285≥54
177.8-279.47-11≥689≥931≥13≥285≥54
C Type Drill collar mechanical properties
OD scopeYield strength MpaTensile strength MpaElongation %
mmin
89.9-174.63 1/2-6 7/8≥758≥827≥18
177.8-279.47-11≥689≥758≥20

Photos and details

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