DH-531 Retrievable Hydraulic Packer  Application  Apply for acid treatment and fracture.  Features  • Can inverse well-flush when it fracturing sand plug to make sure  the packer can be released safe.  • Flexible claw ball seat ensure inner diameter.  • Self-setting cup design provide setting force,Website:http://www.dhpetrotools.com,and it can prevent sand in a  way.  • Hydraulic anchor and packer integrated design can prevent fracturing string  going up in the process.  • Backwashing valve design can backwash when fracturing sand plug.Casing (in)OD. (mm)ID. (mm)Length (mm)Temp. (℃)Pressure (MPa)Thread (in)5-1/24.331.6562.17250-3007000-100003-1/2 NU B * 2-7/8 NU P5-1/24.531.8963.98250-3007000-100003-1/2 NU B *2-7/8 NU P5-3/44.722.0565.08250-3007000-100003-1/2 NU B * 2-7/8 NU P65.312.3666.61250-3007000-100003-1/2 NU B * 2-7/8 NU P6-5/85.512.3667.83250-3007000-100003-1/2 EU B * 2-7/8 EU P6-5/85.672.4469.13250-3007000-100003-1/2 EU B * 2-7/8 EU P75.832.7670.08250-3007000-100003-1/2 EU B * 3-1/2 NU P75.982.7670.59250-3007000-100003-1/2 EU B * 3-1/2 NU P7-5/86.502.9971.69250-3007000-100003-1/2 EU B * 3-1/2 NU P8-5/87.282.9972.95250-3007000-100004 NU B * 3-1/2 NU P9-5/88.273.1573.62250-3007000-100004 EU B * 3-1/2 NU P9-5/88.463.1576.06250-3007000-100004 EU B * 3-1/2 NU P