Design Of 8-1/2 -9-7/8 TGX-K Type Of Enlarge-while-drilling Tool Under The Casing

This topic is researching for the design of "enlarge-while-drilling under the casing" , In the previous drilling process, The lower part borehole diameter must be less than a layer of the inner diameter of the casing, While the conventional drilling program will bring greatly inconvenience for the corresponding casing down into the well and completion, Largely as the creasing of complex well such as the super deep wells, the high-deviated wells and the highly-displacement wells and so on, Especially as the development of Marine deep-water drilling, Make the well body structure more and more complex, more and more casing stratigraphy, more small clearance between each layer casing and the holes, This will directly affect the casing and cementing operations and the completion homework and development of oil and gas, But our complex drilling are increasing, Offshore oil also began to stepped into deep-water, It's imminent for the enlarge-while-drilling tools under the casing, For breaking foreign monopoly, It's very necessary to develope our TGX - K enlarge-while-drilling tool under casing with our independent intellectual property.Design and drawing the structure and size of the enlarge-while-drilling tool using 2d software AUTOCAD and 3d software PRO/E according to the requirements of the technical and economic index, Then selection the material of the tool according to the work environment it works in and check on the strength of the main parts using some basic check formula and ANSYS software according to the previous designed size and selectioned material, when we make the ansys analysis we should equivalent and simplified the model which can conducive to grid division and make the results more accurate.