DH-422 Retrievable Mechanical Packer Application:  Apply for operation such as water plugging and fracturing in the oil field,Website:http://www.dhpetrotools.com, it can also be used as the bridge plug in the well.  Feature:  •  The usage range of the tools and instruments on the packer is wider than the ordinary packer.  •  There is no O-ring, preventing the packer invalidation because of the leak of the O-ring.  •  Double grip supporting, the anchor state is stable, preventing the packer  invalidation because of the moving of the string. Meanwhile, the packer can work  in either compression, tensile or neutral state because of bidirectional anchor.  •  One of the upper slips uses special teeth thread, makes the packer easy to be released.  • There's a emergency unlock device to ensure packer can be released successfully.  Parameters: Casing (in) OD. (in) ID. (in) Length (in) Temp. (℉) Pressure (psi) Thread (in) 5 4.49 2.28 84.49 250-300 5000-10000 2-7/8 EU 5-1/2 4.72 2.44 88.03 250-300 5000-10000 2-7/8 EU 6 5.31 2.44 88.90 250-300 5000-10000 2-7/8 EU 6-5/8 5.51 2.44 90.28 250-300 5000-10000 2-7/8 EU 6-5/8 5.67 2.99 92.24 250-300 5000-10000 3-1/2 EU 7 5.83 2.99 93.39 250-300 5000-10000 3-1/2 EU 7 5.98 2.99 95.08 250-300 5000-10000 3-1/2 EU 7-5/8 6.50 3.46 98.94 250-300 5000-10000 4 EU 8-5/8 7.28 3.46 98.94 250-300 5000-10000 4 EU 9-5/8 8.27 3.46 103.50 250-300 5000-10000 4 EU 9-5/8 8.46 3.94 105.35 250-300 5000-10000 4-1/2 EU