The products uses two-way slide to ensure reasonable force on rubber barrel and prolong its service life. Rubber barrel uses structure of "wire-capsule expansion packer rubber barrel ", using NBR rubber modified special technology with temperature resistance of 120 ?, HNBR rubber barrel modified technology with temperature resistance of 150 ?,FPM peroxide cross-linking technology with temperature resistance of 180 ?. Liner composed of high strength material (Si3N4) isused in tool?s hole shrinkage position and sliding sleeve sealing position to raise anti-wear and operation reliability.
