Design of threaded flange for valve end of high-pressure wellhead.;

Establishment of database about wellhead design;

Develoment of CAD software for wellhead equipment;

In allusion to the fixed characteristics of wellhead equipment structures in oil and gas production,the powerful parametric functions and open system structure of CAXA software were used to establish a data base of wellhead equipment,structures in database could be revised according to the parameters.

The conditions of wellhead equipments on retention wells offshore, Shengli Oilfieldare briefly presented,as well as the existing shortcomings and problems, and the correspounding aresuggested.