Why do we dare to say that our kelly bar are the best in China? First of all, it is because of our strict control on the material. When it comes to materials, we never cut corners. The first two sections of kelly.
[pdf] Drilling derricks and Rig Masts consist of a steel framework with a square or rectangular cross-section. Their purpose is to support the hoisting equipment and rack the tubulars while tripping pipe. The numbe.
[pdf] This chapter will explain the various types of drilling rigs used today. It will try to touch on the unique features of each rig type and their relative advantages and drawbacks. This chapter is not meant to be.
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