Drill pipes are used for lowering into a borehole and lifting a rock-cutting tool, transmitting rotation, creating an axial load on the tool, supplying flushing fluid or compressed air to the bottomhole.

Drill pipes are interconnected by drill locks with a special locking thread. The ends of the pipes are thickened to increase their strength, external (EU), internal (IU) or combined upset (IEU) and are produced in the following strength groups: E-75, E-95, G-105, S-135.

Drill pipes meet the following requirements:

  • specifications API Spec 5D
  • specifications API Spec 7

Specifications

Drill pipe

API Spec 5D

 60,32 7,11 8,23-9,14 11,58-13,72

Е75

Х95

G105

S-135

 locks API Spec 7 external-upset drill pipe
73,02 9,19
88,90 9,35; 11,40
101,60 8,38
114,3 8,56; 10,92
127,0 9,19; 12,7 Х95; G105; S-135
73,02 9,19 8,23-9,14 11,58-13,72 Е75; Х95;

G105; S-135

 locks API Spec 7 internal-upset drill pipe
88,90 9,35; 11,40
101,60 8,38
114,3 8,56; 10,92 Е75
127,0 9,19; 12,7 Е75; Х95;       G105; S-135
88,90 9,35; 11,40 8,23-9,14 11,58-13,72 Х95; G105; S-135 locks API Spec 7 internal-external upset drill pipe
114,3 8,56; 10,92

Е75; Х95;

G105; S-135
127,0 9,19; 12,7
139,7 9,17; 10,54