Single Wall Drill Pipe

Features of Single Wall Drill Pipe

a. Single wall drill pipe in Caston is made from special pipes used for petroleum. With a unique pipe end upsetting technique, the ends of our drill pipe are in line with API 5D standards
b. The heat treatment for pipes allows for a steel grade of G105 or S135
c. The blank forging technique for joints and the controllable nitriding treatment is conducted in accordance with API SPEC7-1 standards
d. Heat treatment deformation technique is adopted for the welded area, with the welding seams in keeping with API SPEC 7 standards
e. We perform 100% flaw detection test for welding seams and joints
f. 100% inspection is employed for the welding seam on 3 points, which are uniformly distributed on the round section

Manufacturing Technique of HDD Drill Rods

a. Made from pipes especially applied in petroleum, the HDD drill pipes show stable and reliable performance
b. The pipes are given unique 2-step thickening and forming technique
c. The transition area is designed with high smoothness to reduce resistance for mud
d. Caston has developed the one-step forming technique in IF heat treatment production line, setting a precedent in Chinese drilling industry
e. The liquid nitriding technique for joints penetrates deeper into the steel surface than the traditional phosphating process
f. The 2 joints are uniform in surface hardness and hardened layer. The high durability and stability of the joints contributes to extend the drill pipe's life dramatically

Technical Parameters
Size Specification Min overlapping area of pin and box joints (mm) Thread type Steel grade Min bending radius Length of drill pipe when bent at 90°(m) Max bending angle Max inclination percentage (%) Torque (KN. m)
mm inch outer diameter (mm) wall thickness (mm) length (m) weight (Kg) joint outer diameter (mm) pin joint box joint
50 2" 50 6.5 2 20 57 110 175 DH50 G 38 60.0 3.0" 5.2 2.9
50 2" 50 6.5 2.5 25 57 110 175 DH50 S 30 47.1 4.8" 8.3 3
60.3 2 3/8" 60.3 7.5 2 25.3 67 130 180 DH60 G 42 66.0 2.7" 4.8 6
60.3 2 3/8" 60.3 7.5 3 37 67 130 180 DH60 S 33 51.8 5.2" 9.1 6.3
73 2 7/8" 73 8 3 45 80 120 180 DH23 G 58 91.1 3.0" 5.2 12
73 2 7/8" 73 8 4 58 80 120 180 DH23 S 45 70.7 3.8" 5.0 13
73 2 7/8" 73 10 3 58 87 120 180 DH26 G 67 105.0 2.6" 4.5 14.5
73 2 7/8" 73 10 4 78 87 120 180 DH26 S 51 80.0 4.5" 7.8 16
83 3 1/4" 83 9 3 59 92 130 190 WM80 G 73 114.7 2.4" 4.1 16.8
83 3 1/4" 83 9 4.5 84 92 130 190 WM80 S 65 102.1 4.0" 6.9 18
89 3 1/2" 89 10 4.5 102 104 150 230 DH31 G 80 125.7 3.2" 5.6 22.3
89 3 1/2" 89 10 6 130 104 150 230 DH31 S 72 113.0 4.8" 8.3 24

Among the directional drilling tools, we offer single wall drill pipe and other drill rig accessories, including downhole drilling tools, oil drilling tools, exploration drilling tools, geothermal drilling tools, deep well drilling tools, heavy engineering drilling tools, etc. Fully equipped with drill pipe production lines and other process equipment, as each detail is checked during manufacturing, we can provide quality single wall drill pipe and other drilling tools for global customers.

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