I.Characteristics 1.The operation of in and out drill rod doesnt need to change slips, which greatlyreduces workers labor intensity. 2.The body of slips has large contact area with drill rod, high load capacity andmeets the requirements of 7000m drill rod operation. 3.The body of slips has lower operational height and doesnt affect wellheadoperation; 4.The slips match sof zp175, zp205, zp275 and zp375. 5.The slips could hold drill pipes of 3-1/2, 4-1/2, 5 and 5-1/2 . No packing
