... is suitable to use screw pump for mechanical oil production operation. Screw pump wellhead(API 6A Series)Pressure:2000PSI~20000PSIMediumOil, gas, mud ... wellhead can use PCP to perform production practice. Make prevented valve ,top flange and cross to an integral to decrease height ... ,FF,HH Specification level: PSL1-4Performance Requirement: PR1-2 Screw Pump Wellhead(API 6A)