OD: 3 1/8"-11"

Length: 30ft / 31ft / 43ft / r1~r3

Standard: api 5dp/api spec 7-1 e75,x95,g105,s135

Connection Type: nc, reg, fh, if

Thread: nc26, nc31, nc38, nc40, nc46, nc50,5.1 / 2fh

Material: stainless steel / alloy steel /carbon steel / 4145h

Classification: non magnetic drill collar, slick drill collar, spiral drill collar,square drill collars, monel drill collar, pony drill collar, spesifikasi drill collar

Application: oil and gas well drilling, oilfield drilling, mine blasting, water well drilling, geothermal wells drilling, fore poling, coal and nonferrous metal mining projects