Baosteel's high-torsion anti-sulfur drill pipe Turkmenistan
2021-07-04
Recently, Baosteel successfully developed a high-torque, anti-sulfur drill pipe. The first 5,000-meter product has been successfully shipped and exported to Turkmenistan.
The natural gas project on the right bank of the Amu Darya River in Turkmenistan is the largest overseas gas exploration and development cooperation project so far in China. It is developed by CNPC and some of its natural gas is exported to China via the West-East Gas Pipeline. The operating conditions of the gas field are very complex and require the drill pipe to have high torsion and sulfur resistance. Last year, CNPC Chuanqing Drilling Company ordered 17,000 meters of high-torsion anti-sulfur drill pipe from Baosteel, of which 5,000 meters supplied the right bank of Amu Darya in Turkmenistan.
In order to complete the first batch of contracts, Baosteel technicians worked closely with production operators to boldly improve the heat treatment production process, and conquered the world-wide challenges of high-strength, large-wall-thickness, sulfur-resistant joint heat treatment. Baosteel technicians also specially drafted a guide to go downhole to ensure the correct use of the product by users. For the smooth export of products, Baosteel's marketing staff not only provided a Russian quality guarantee book, but also actively cooperated with users to carry out export inspection work and were well received by users.
Friction Welding Drill Pipe and Adapter
Friction welding drill pipe and adapter are in accordance with API SPEC 5DP and SY/T5561-2008 Specifications.The steel grade are DZ250,R780,G105,S135 that are after partly or overall heat treatment.The adapter part adopts thermal refining to superior alloy steel 35CrMo or 4137H that`s after thread hardening treatment and phosphating to better antiseize.It also can be produced upon customers` requirements.
Technical specifications of Friction welding drill pipe
|
Drill Pipe Diameter |
Upset Type |
RSC Model |
Steel Grade |
mm Wall Thickness |
mm External diameter of upset end |
mm Internal diameter of upset end |
|
|
mm |
in |
||||||
|
60 |
2 3/8 |
EU |
NC26 |
DZ50,R780 |
6/7.11 |
65.1 |
46.10 |
|
EU |
NC26 |
G105,S135 |
7.11 |
65.1 |
39.67 |
||
|
73 |
27/8 |
EU |
NC31 |
DZ50,R780 |
9 |
81.0 |
54.64 |
|
EU |
NC31 |
G105,S135 |
9.19 |
81.0 |
50.80 |
||
|
89 |
31/2 |
EU |
NC38 |
DZ50,R780 |
10 |
98.4 |
66.09 |
|
EU |
NC38 |
G105,S135 |
9.35 |
98.4 |
63.50 |
||
|
114 |
41/2 |
IEU |
NC46 |
DZ50,R780 |
8 |
127.0 |
92.00 |
|
IEU |
NC46 |
G105,S135 |
8.56 |
119.1 |
73.02 |
||
|
EU |
NC50 |
G105,S135 |
8.56 |
127.0 |
90.47 |
||
|
127 |
5 |
IEU |
NC50 |
DZ50,R780 |
10 |
130.2 |
90.47 |
|
IEU |
NC50 |
G105,S135 |
9.19 |
130.2 |
90.47 |
||
|
139.7 |
51/2 |
IEU |
51/2FH |
G105,S135 |
9.17 |
144.5 |
96.82 |
|
168 |
65/8 |
IEU |
65/8FH |
G105,S135 |
9.19 |
176.2 |
135.00 |
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