First generation insert seal

Technical features:
 Seal of downhole back-off tool, which can achieve effective sealing in various sand-carrying environments;
 temperature resistance: 150℃;
 Maximum pressure resistance: 7500Psi;
 Test standard: Refer to API 11D10/V3 ；
 Applicable standard seal cylinder size range: 3.25”～6”;
 Provide custom design, production and testing of-standard products;