Design and application of special low wellhead for surface driven screw pump well

The reasons for screw pump to operate more unsteadily with the increase of the height of screw pump wellhead are analyzed.On the basis of the structure of existing wellhead,the special low wellhead for surface driven screw pump well is designed.The wellhead not only has all the functions of existing wellhead,but also many advantages,such as low manufacturing cost,steady operation and reducing labor intensity of the work etc.