Brand Name:MTWK Place of Origin:China Model Number :MTWK-1 Grade :4145H Length :9150 or 9450mm Outer Diameter :3 1/8"-14" Specification :VARIOUS Technique :Seamless Usage :well drilling
The spiral drill collars are made of 4145HMOD modified chromium-molybdenum alloy steel according to API Spec 7-1 . All threads can be phosphated,copperised or cold worked. All threads are machined with CNC Lathes-Double-Shouldered and a special thread, the max diameter of spiral drill collar is 14 inch.
Out diamete: 3 7/8"~ 14"(inch)
Depth of cut: 4.0 ~ 11.9 (mm)
Length: 9150+150(mm)
Out diamete: 3 7/8"~ 14"(inch)
Depth of cut: 4.0 ~ 11.9 (mm)
Length: 9150+150(mm)
Main Products
drill pipe.drill collar, stabilizers, kelly,heavy weight drill pipe